ENERGY STAR Program Requirements
for Set-top Boxes
DRAFT 3 - Version 2.0
January 14, 2008
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Table of Contents
Partner Commitments
Commitments
Performance for Special Distinction
Eligibility Criteria
Section 1: Definitions
Section 2: Qualifying Products
Section 3: Energy Efficiency and Power Management Criteria
Section 4: Testing Products for ENERGY STAR
Section 5: User Interface
Section 6: Effective Date
Section 7; Future Specification Revisions
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L- NE- KGV SIAR
PAR. Ni'M
ENERGY STARฎ Program Requirements
for Set-top Boxes
Partner Commitments
DRAFT 3 - Version 2.0
January 14, 2008
52
Commitment
The following are the terms of the ENERGY STAR Partnership Agreement as it pertains to the
manufacturing of ENERGY STAR qualified set-top boxes (STBs). The ENERGY STAR Partner must
adhere to the following program requirements:
•	comply with current ENERGY STAR Eligibility Criteria, defining the performance criteria that must be
met for use of the ENERGY STAR certification mark on set-top boxes and specifying the testing
criteria for set-top boxes. EPA may, at its discretion, conduct tests on products that are referred to as
ENERGY STAR qualified. These products may be obtained on the open market, or voluntarily
supplied by Partner at EPA's request;
•	comply with current ENERGY STAR Identity Guidelines, describing how the ENERGY STAR marks
and name may be used. Partner is responsible for adhering to these guidelines and for ensuring that
its authorized representatives, such as advertising agencies, dealers, and distributors, are also in
compliance;
•	qualify at least one ENERGY STAR set-top box model within 30 days of activating the set-top box
portion of the agreement. When the manufacturing Partner qualifies the product, it must meet the
specification (e.g., Version 2.0, Tier 1) in effect at that time;
•	for all qualified STBs sold at retail or directly to the consumer, provide clear and consistent labeling of
ENERGY STAR qualified set-top boxes. The ENERGY STAR mark must be clearly displayed on the
product, or via electronic notification.
1. via electronic notification:
-	The ENERGY STAR mark must appear in cyan, black, or white (as described in the ENERGY
STAR Identity Guidelines');
-	The ENERGY STAR mark must be at least 10% of the screen by area, may not be smaller
than 76 pixels x 78 pixels, and must be legible;
-	The ENERGY STAR mark must appear for a duration not less than five seconds at power up,
or at another event/location proposed by partner and approved by EPA in advance of
distribution to consumers; and
-	The ENERGY STAR mark must be displayed as part of the auto power down notification, or at
another event/location proposed by partner and approved by EPA in advance of distribution to
consumers.
Note: EPA welcomes feedback on the above proposal, which allows flexibility in displaying the ENERGY
STAR mark at power up and power down.	
2. via a permanent or temporary label on product:
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- Label must follow guidance for certification marks provided in the ENERGY STAR Identity
Guidelines (https://www.enerqystar.qov/index.cfm?c=loqos.pt guidelines).
For all qualified STBs sold to service providers, Partner may, but is not required to, provide labeling. If
labeling is provided, then it must meet the requirements above for electronic notification or physical
labeling. Appropriate labeling of boxes provided to subscribers is the responsibility of the service
provider. However, Partner may provide this labeling for service providers. Partner must clearly
communicate the requirements for configuration and installation that are necessary for the STB to
maintain ENERGY STAR qualification and receive labeling.
Note: Based on stakeholder comments, the above labeling requirements have been clarified. In
the case where a STB is sold to a service provider, the service provider is responsible for ensuring
that the STB is appropriately labeled. However, Partner may provide labeling for service provider.
•	for all qualified products, clearly display the ENERGY STAR mark:
1.	In product literature (i.e., user manuals, spec sheets, etc.);
2.	On product packaging for products sold at retail; and
3.	On the manufacturer's Internet site where information about ENERGY STAR qualified models
is displayed;
•	explain the conditions under which the model is able to earn the ENERGY STAR in product guide and
specification sheets for each qualified product. For STBs sold at retail, include information on how
using the product in conjunction with a Service Provider subscription (cable, satellite, IP) can impact
the product's energy use, and what steps the consumer must take to assure that the product still
meets ENERGY STAR criteria. In addition, these materials shall notify service providers that they
must complete an ENERGY STAR Partnership Agreement before labeling any STB, or claiming to
provide ENERGY STAR qualified STBs in advertising or promotions.
•	provide to EPA, on an annual basis, an updated list of ENERGY STAR qualified set-top box models.
Once the Partner submits its first list of ENERGY STAR qualified set-top box models, the Partner will
be listed on the ENERGY STAR Web site. Partner must provide annual updates in order to remain on
the list of participating product manufacturers;
•	provide to EPA, on an annual basis, unit shipment data or other market indicators to assist in
determining the market penetration of ENERGY STAR. Specifically, Partner must submit the total
number of ENERGY STAR qualified set-top boxes shipped (in units by model) or an equivalent
measurement as agreed to in advance by EPA and Partner. Partner is also encouraged to provide
ENERGY STAR qualified unit shipment data segmented by meaningful product characteristics (e.g.,
type, presence of additional functions, or other as relevant), total unit shipments for each model in its
product line, and percent of total unit shipments that qualify as ENERGY STAR. The data for each
calendar year should be submitted to EPA, preferably in electronic format, no later than the following
March and may be provided directly from the Partner or through a third party. The data will be used
by EPA only for program evaluation purposes and will be closely controlled. Any information used will
be masked by EPA so as to protect the confidentiality of the Partner;
•	notify EPA of a change in the designated responsible party or contacts for set-top boxes within 30
days.
Performance for Special Distinction
In order to receive additional recognition and/or support from EPA for its efforts within the
Partnership, the ENERGY STAR Partner may consider the following voluntary measures and should keep
EPA informed on the progress of these efforts:
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consider energy efficiency improvements in company facilities and pursue the ENERGY STAR mark
for buildings;
•	purchase ENERGY STAR qualified products. Revise the company purchasing or procurement
specifications to include ENERGY STAR. Provide procurement officials' contact information to EPA
for periodic updates and coordination. Circulate general ENERGY STAR qualified product information
to employees for use when purchasing products for their homes;
•	feature the ENERGY STAR mark(s) on Partner Web site and in other promotional materials. If
information concerning ENERGY STAR is provided on the Partner Web site as specified by the
ENERGY STAR Web Linking Policy (this document can be found in the Partner Resources section on
the ENERGY STAR Web site at www.enerqvstar.gov). EPA may provide links where appropriate to
the Partner Web site;
•	ensure the power management feature is enabled on all ENERGY STAR qualified monitors and
computers in use in company facilities, particularly upon installation and after service is performed;
•	provide general information about the ENERGY STAR program to employees whose jobs are relevant
to the development, marketing, sales, and service of current ENERGY STAR qualified product
models;
•	provide a simple plan to EPA outlining specific measures Partner plans to undertake beyond the
program requirements listed above. By doing so, EPA may be able to coordinate, communicate,
and/or promote Partner's activities, provide an EPA representative, or include news about the event in
the ENERGY STAR newsletter, on the ENERGY STAR Web pages, etc. The plan may be as simple
as providing a list of planned activities or planned milestones that Partner would like EPA to be aware
of. For example, activities may include: (1) increase the availability of ENERGY STAR qualified
products by converting the entire product line within two years to meet ENERGY STAR guidelines; (2)
demonstrate the economic and environmental benefits of energy efficiency through special in-store
displays twice a year; (3) provide information to users (via the Web site and user's manual) about
energy-saving features and operating characteristics of ENERGY STAR qualified products: and (4)
build awareness of the ENERGY STAR Partnership and brand identity by collaborating with EPA on
one print advertorial and one live press event;
•	provide quarterly, written updates to EPA as to the efforts undertaken by Partner to increase
availability of ENERGY STAR qualified products, and to promote awareness of ENERGY STAR and
its message.
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ENERGY STAR
ENERGY STAR Program Requirements
for Set-top-Boxes
Eligibility Criteria
DRAFT 3 - Version 2.0
January 14, 2008
1) Definitions: Below are the definitions of the relevant terms in this document.
STB Types
All STB types can come as stand-alone tuners or as part of a larger device with other tuners and/or
secondary functions such as, but not limited to, DVR and DVD playback/recording.
A.	Cable STB: A STB whose principal function is to receive television signals from a broadband,
hybrid/[fiber] coaxial, community cable distribution system and deliver them to a consumer display
and/or recording device. Source: CSA C380-06 modified.
B.	Internet Protocol (IP) STB: A STB whose principal function is to receive television/video signals
encapsulated in IP packets and deliver them to a consumer display and/or recording device.
Source: CSA C380-06.
C.	Satellite STB: A STB whose principal function is to receive television signals from satellites and
deliver them to a consumer display and/or recording device. Source: CSA C380-06.
D.	Terrestrial STB: Any STB whose principal function is to receive television signals over the air
(OTA) and deliver them to a consumer display and/or recording device. Source: CSA C380-06.
E.	Thin-Client/Remote: A STB that is designed to interface between a Gateway STB and a TV (or
other output) that has no ability to interface with the service provider directly and relies solely on a
Gateway box for content. Any STB that meets the definition of Cable, Satellite, IP or Terrestrial
STB is not a Thin-Client/Remote STB.
Components
F.	Conditional Access: The encryption, decryption, and authorization techniques employed to protect
content from unauthorized viewing. CableCARD and Downloadable Conditional Access (DCAS)
are examples of this technology.
G.	Data Over Cable Service Interface Specification (DOCSIS): An international suite of standards
that define interface requirements for cable modems involved in high-speed data and video/audio
content distribution over cable television systems.
Functionalities
H. Base Functionality: For purposes of this specification, the primary functionality that defines the
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criteria that apply to a STB. The Base Functionality is one of the following: Cable, Satellite, IP,
Terrestrial or Thin-Client/Remote. (See Section 3 below.)
I. Additional Functionalities: Additional Functionalities consist of one or more of the following:
Additional Tuners, Additional Tuners - OTA/IP, Advanced Video Processing, DVR, High Definition
Resolution (does not apply to terrestrial), Removable Media Player, Removable Media
Player/Recorder, Gateway, and Cable Card.
Additional Functionalities
J. Additional Tuners: An additional tuner provides a second source of media content either from a
physically separate A/V input or from the primary input (used concurrently); they need not be for
the same source media type. Out-Of-Band tuners built in compliance with standards ANSI/SCTE
55-1 2002 and ANSI/SCTE 55-2 2002 and other similar types of technologies are not considered
additional tuners for the purposes of this specification. For example, a device with additional
tuners has the ability to tune into two or more separate streams of video simultaneously and place
those on separate outputs (outputs being either physical outputs, picture-in-picture, or recording
mechanisms). Note that network-based outputs are not covered under the additional tuners
definition but are covered in the definition of a gateway device.
K. Additional Tuners - Terrestrial / IP: An Additional Tuner of Terrestrial or IP type.
L. Advanced Video Processing/Codecs: Advanced methods for video encoding, transcoding and
decoding. Examples include, but are not limited to, H.264/MPEG 4 and SMPTE 421M.
M. Digital Versatile Disk (DVD): An optical disc storage media format that can be used for data
storage, including movies, with high video and sound quality.
N. Digital Video Recorder (DVR): A device that records video in a digital format to a rewritable disk
drive or other non-volatile storage media local to the unit. The term covers DVR functions
integrated in a STB; it does not include software for personal computers that enables video
capture and playback to and from the computer's data storage nor does it include server based
DVR capabilities.
O. High Definition Resolution: Video with resolutions greater than 480i/p.
P. Out-Of-Band Tuners: Tuners compliant with standards ANSI/SCTE 55-1 2002 and ANSI/SCTE
55-2 2002 and other similar types of technologies used to gain access to data channels outside of
the audio/video source signal. These may facilitate two-way communication and allow the box to
send diagnostic information back to the Service Provider as well as enabling Pay-Per-View
content and other rich media interactive content.
Q. Removable Media Player: A device, such as a DVD player, whose primary purpose is the
decoding of digitized video signals on a DVD.
R. Removable Media Player/Recorder: A device, such as a DVD recorder, whose primary purpose is
the production or recording of digitized video/audio signals on a DVD.
S. Gateway STB: A STB that meets the definition for Cable, Satellite, IP or Terrestrial STB above
and is capable of providing independent content to multiple TVs.
T. CableCARD(TM): A plug-in card that complies with the ANSI/SCTE 28 interface that is inserted
into a Digital Cable Ready device to enable the decryption of premium services and provide other
network control functions. Also know as a "Card" or a "Point of Deployment" (POD module).
CableCARD(TM) is a registered trademark of CableLabsฎ. Source: CSA C380-06 modified.
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Operational Modes and Power States
U. On/Active: An operational state in which the STB is actively delivering one or more of its principal
functions and some or all of its applicable secondary functions.
V. Sleep: A state in which the STB has less power consumption, capability, and responsiveness than
in the On/Active state. The STB may enter a Sleep state from the On/Active state after:
a.	the user pushes a power/standby button on the remote or on the unit; or
b.	the STB auto power downs to a Sleep state. The energy consumption after auto power
down to Sleep and after a user initiated power down to Sleep may, or may not be,
equivalent.
Note: Based in part on stakeholder feedback, EPA has decided to use the term "Sleep" rather
than "Standby" to avoid confusion with other EPA specifications and international standards.
Miscellaneous
W. Auto Power Down: The capability to automatically switch from the On state to a Sleep state after
a period of time without user input, generally based on the amount of time the unit has remained
"idle" from last active use, i.e., user input such as channel change, volume change, menu access,
etc.
X. Cable. Satellite, and Telecom Service Provider: An entity that provides video (and possibly other)
content to subscribers with whom it has an ongoing financial relationship. A service provider in the
context of ENERGY STAR is one that distributes to end users STBs covered by this specification
under an agreement such as a lease or rental arrangement.
Y. CSA: The Canadian Standards Association is a not-for-profit, membership-based association that
works in Canada as well as globally to develop standards that affect areas such as public safety
and health, quality of life, the environment, and trade.
Z. C380-06: CSA's test procedure for the measurement of energy consumption of STBs.
AA. Digital Television Adapter (DTA): Receives terrestrial (over the air), digital signals and converts
them to an analog output suitable for analog TVs. DTAs do not provide digital signal output. For
the purposes of this specification, the DTA category does not include converters that work with
satellite or cable digital signals, nor does it cover devices with multi-functionality such as DVD
players with digital to analog conversion capability. Source: ENERGY STAR Digital-to-Analog
Converter Box specification.
DTAs are addressed under the Version 1.1 ENERGY STAR specification for Digital-to-Analog
Converter Boxes, and are not included in this Set-top box specification.
BB. Game Console: A stand-alone device whose primary use is to play video games. The primary
inputs for game consoles are special hand held controllers rather than a mouse and keyboard
used by conventional computers. Game consoles are also equipped with audio-visual outputs for
use with televisions as the primary display, rather than an external monitor or integrated display.
These devices typically do not use a conventional operating system, but often perform a variety of
multimedia functions such as: DVD/CD playback, digital picture viewing, and digital music
playback. Source: ENERGY STAR Version 4.0 Computers specification.
Game consoles are addressed by the ENERGY STAR Version 4.0 Computers specification, and
are not included in this Set-top Box specification.
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CC.TEC: Total Energy Consumption. TEC is an assessment tool used in this specification that
provides flexibility to approach the issue of energy efficiency while retaining a comparable metric
to assess performance. In this specification, efficiency criteria are noted in terms of calculated
energy use over a year for a typical user (kWh/yr) rather than power (Watts) for On and Sleep
states.
DD.UUT: Unit Under Test (UUT) refers to the product being tested. Source: CSA C380-06 modified.
2) Qualifying Products: In order to qualify as ENERGY STAR under Tier 1 of this specification,
STBs must meet the definition for these products in Section 1 and meet the technical requirements in
Section 3. The following devices that fall within the definition of a STB, or provide functions similar to
STBs, do not qualify under this Tier 1 specification. EPA envisions that the below excluded products list
will likely be modified for the Tier 2 phase of this specification:
Tier 1 Excluded Products:
•	Game Consoles (See definition above)
•	DTAs (See definition above)
•	IP set-top boxes sold or provided outside of a dedicated service or service contract
•	Products that qualify under the ENERGY STARฎ Program Requirements for Consumer
Audio and DVD Products
Note: Following the proposal sent out to stakeholders and discussed during the October 31st call,
this draft excludes for Tier 1 products that qualify under the ENERGY STAR Audio and DVD
specification. Terrestrial tuners in DVD products may be addressed in any future revision of the
Audio and DVD specification, or integrated into Tier 2 of the STB specification.	
3) Energy Efficiency and Power Management Criteria: Only those products addressed by
the Qualifying Products definition in Section 2 that meet the following criteria may qualify for ENERGY
STAR.
A)	Calculated TEC Criteria
The criterion for ENERGY STAR qualified STBs is a calculated TEC (in annual kWh). The criterion
(herein called an "allowance") is an allowance for Base Functionality, plus allowances for specific,
additional functionalities present across a duty cycle. This duty cycle is further explained in Section 4.
B)	Base Functionality Allowance
The Base Function shall be established as detailed below.
a.	If the STB meets the definition of Cable STB above, regardless of whether the cable
reception is considered the "principal function" by the manufacturer or service provider,
and/or the STB is capable of receiving cable service after installation of a CableCARD™
or other type of conditional access (CA) system, the Base Functionality is CABLE.
b.	If the STB Base Function is not CABLE, and the STB meets the definition of Satellite STB
above, regardless of whether the satellite reception is considered the "principal function"
by the manufacturer or service provider, the Base Functionality is SATELLITE.
c.	If the STB Base Function is not CABLE or SATELLITE, and the STB meets the definition
of IP STB above, regardless of whether the IP reception is considered the "principal
function" by the manufacturer or service provider, the Base Functionality is IP.
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d.	If the STB Base Function is not CABLE, SATELLITE, or IP, and the STB meets the
definition of Terrestrial STB above, regardless of whether the terrestrial reception is
considered the "principal function" by the manufacturer or service provider, the Base
Functionality is TERRESTRIAL.
e.	If the STB Base Function is not CABLE, SATELLITE, IP or TERRESTRIAL, and the STB
otherwise meets the definition of Thin-Client/Remote, the Base Function is THIN-
CLIENT/REMOTE.
Table 1: Base Functionality Annual Energy Allowance
Base Functionality
Tier 1 Annual Energy
Allowance (kWh/year)
Tier 2 Annual Energy
Allowance (kWh/year)
Cable
70
50
Satellite
88
56
IP
45
36
Terrestrial
27
22
Thin-Client/Remote
27
22
Note: EPA relied heavily on power measurements reported in Roth, Kurt & Kurtis McKenney,
TIAX, "Energy Consumption by Consumer Electronics in U.S Residences," January 2007 to
establish allowances for Tier 1. Results were compared against the data set provided by the
NRDC of currently installed STBs. This also applies to Additional Functionalities as shown in
Table 2.
EPA believes establishing criteria for Tier 2 is important to provide a target for energy savings
within the next few years. The basis for the proposed Tier 2 allowances involved two scenarios
with approaches that manufacturers and service providers could use to meet the criteria. The 3-
Watt Sleep was assumed for a scenario in which a STB was designed to allow for a substantial
amount of time in the Sleep mode. An Excel Workbook detailing the assumptions was shared with
stakeholders after the San Diego meeting and is available on the ENERGY STAR Web site. EPA
will review, with stakeholder engagement, the proposed Tier 2 levels, well in advance of the Tier 2
effective date to ensure that these levels remain appropriate.	
C) Additional Functionalities Allowance
The Additional Functionalities Allowance, if applicable, shall be determined using values from Table 2.
Table 2: Additional Functionalities Annual Energy Allowance
Additional Functionalities
Tier 1 Annual Energy
Tier 2 Annual Energy

Allowance (kWh/year)
Allowance (kWh/year)
Additional Tuners
53
16
Additional Tuners - Terrestrial /IP
14
8
Adv. Video Processing
18
12
DVR
60
32
High Definition1
35
12
Removable Media Player
12
8
Removable Media Player/Recorder
23
10
Gateway
44
25
Cable Card
15
TBD
1 Credit for High Definition applies to all STBs except those with Base Functionality of TERRESTRIAL.
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Note: Changes made to Tables 1 and 2 above in this Draft 3 specification are based on feedback from
stakeholders and additional EPA investigation. Specific changes are listed below.
Table 1: Base Functionality Annual Energy Allowance
•	A base functionality for Thin-Client/Remote has been added as part of a solution to
incorporate Home Networking.
•	Allowances for the IP Base Functionality have been added to the table.
•	Tier 2 allowances for Cable and Satellite have been increased in response to stakeholder
concerns that meeting the Draft 2 Tier 2 values was not feasible given the time frame.
Table 2: Additional Functionalities Annual Energy Allowance
•	Tier 1 DVR allowance has been reduced based on stakeholder feedback.
•	Clarification has been made regarding the allowance that Additional IP Tuners receive.
•	Tier 2 allowances for Additional Tuners, Advanced Video Processing, Removable Media
Player, and Removable Media Player/Recorder have been raised from Draft 2, in response to
stakeholder concerns that meeting the Draft 2 values is not feasible in the given time frame.
•	Allowances for Cable Card and Gateway Functionalities have been added. (See special
requirements for Gateway in section 4(F) below.) A Tier 2 criterion for Cable Card is TBD as
EPA plans to revisit the need for a Cable Card allowance as the Tier 2 effective date
approaches.
D) Calculating Device Allowances
To calculate the ENERGY STAR allowance for a given device, take the sum of the base functionality
allowance and all applicable additional functionalities allowances. (Note there may not be any
additional functions in devices such as standard cable or satellite STBs.) This sum is the calculated
annual kWh limit, or TEC value. This sum equals the maximum amount of energy the box can use in
a given year as calculated following the ENERGY STAR test procedure.
Annual Energy Allowance (kWh/year) = Base Functionality Allowance + Additional Functionalities
Allowance
Examples:
(A)	Under Tier 1, the energy allowance for a high-definition, Cable STB with DVR to qualify for
ENERGY STAR would be 165 kWh/y (70 kWh/y for the base function, 35 kWh/y for the high
definition and 60 kWh/y for the DVR).
(B)	Under Tier 2, the energy allowance for the same product would drop to 94 kWh/y.
E) STBs Using an External Power Supply
To qualify, the external power supply must be ENERGY STAR qualified or meet the no-load and active
mode efficiency levels provided in the ENERGY STAR Program Requirements for Single Voltage Ac-Ac
and Ac-Dc External Power Supplies. The ENERGY STAR specification and qualified product list can be
found at: www.enerqvstar.gov/powersupplies.
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Note: To clarify the above paragraph, manufacturers have two options to meet this requirement: (1) use an
ENERGY STAR qualified EPS (see link in text above to the qualified products list), or (2) test the power
supply they intend to use following the ENERGY STAR test procedure to determine it meets the ENERGY
STAR specification. STB manufacturers may also request that EPS manufacturer test EPS product and
certify that it meets ENERGY STAR requirements.
F) Gateway STBs
When using the Gateway Additional Functionalities energy allowance to establish the criteria for a STB,
the following procedure should be followed. This allowance should only be used for STBs that can provide
independent content to more than one TV. Specific requirements for Gateway STBs are also included.
•	First, test the multi-room STB and compare the results to the specification criteria assuming the
STB will deliver content to only one TV, i.e., do not include the Gateway allowance. If the STB
passes, then it qualifies as an ENERGY STAR qualified STB under any installation configuration,
i.e., it can be used for one or more TVs.
•	If the STB does not pass the single TV STB test, then determine if it qualifies as a Gateway STB.
o Add the Gateway additional annual energy allowance listed in Table 2 to the criteria
established for the STB. Compare the test results to the more lenient Gateway criteria to
see if the STB qualifies for ENERGY STAR,
o If the STB qualifies as a Gateway STB, manufacturer must clearly indicate in product
literature that product only qualifies for ENERGY STAR when providing content to more
than one TV.
4) Testing Products for ENERGY STAR:
A) Product Testing Set-up. Procedures, and Documentation:
The test results produced by the ENERGY STAR test procedure (AKA; modified CSA 380-06) shall be
used as the primary basis for determining ENERGY STAR qualification. Manufacturers are required to
perform tests and self-certify those models that meet the ENERGY STAR requirements.
B)	TEC Assessment
In this specification, the power consumed in the On and Sleep states will be multiplied by the number of
hours a defined typical device spends in On and Sleep. The result will be a single energy value
representing the energy usage of the device over the course of an entire year.
To determine if a STB meets the ENERGY STAR specification criteria (Annual Energy Allowance), the
TEC of the STB shall be calculated as follows. If the TEC assessed for the product is less than the Annual
Energy Allowance calculated from Section 3D, the product meets the criteria and has earned the
ENERGY STAR.
C)	Equation 1: Base Assessment
Applies To All Products
Calculate the Base energy consumption by multiplying the measured power consumption as specified in
this test procedure by the hours per day values in the equations below. If the UUT (Unit Under Test) does
not include the capability for auto power down, then use the first equation (a). If the product does include
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auto power down capability, and it meets the requirements in section (F) below then use the second
equation (b).
Ptv, Psieep and PAutoPDare power levels in Watts as measured according to the ENERGY STAR test
procedure.
a) Annual energy (kWh/yr) for a product with no auto power down
kWk,,, = 0365 x (14 x ptv + io x psleep)
b) Annual energy (kWh/yr) for a product with auto power down capability
kWhB,„ = 0 365 >< ((7 >< p,v)+(io * ps„,)+ (7 x -Pป„.pd))
Examples:
(C)	The UUT (HD DVR cable STB, Tier 1) does not have auto power down capability, and the
measurement during the test procedure are as follows: PTV = 24.0 Watts and PSieep= 18.0 Watts. The
annual energy consumption is then:
kWhBase= 0.365 *(14 *24.0 + 10* 18.0) = 188.3 kWh/yr
(D)	The UUT (HD DVR cable STB, Tier 1) does have auto power down capability, and the measurements
during the test procedure are similar to example A: PTV = 24.0 Watts, Psieep = 18.0 Watts and PAutoPD =
18 Watts. The annual energy consumption is then:
	kWhBase = 0.365 *(7 *24.0 + 10* 18.0 + 7* 18.0) = 173 kWh/yr	
Note: EPA used an analysis of available Nielson data to develop the above user models. The above is
based on the statistical probability that a user is watching TV at any given time (segregated into 1/2 hour
segments) with assumptions regarding which segments viewers were most likely to be watching. This
yielded three distinct viewing periods - morning, afternoon, and evening.
EPA understands that for most products, the power levels for PSieeP and PAut0 PD will be the same. However,
it is important for EPA to provide the flexibility for cases where these levels differ; therefore, two equations
have been provided in this specification.	
D) Equation 2: Playback And Record Assessment
The table and equation below illustrate how to calculate from the values measured in the test procedure
the annual energy consumption for the added functionalities such as playback and record. These apply
only to products with a DVR, Removable Media Playback, or Removable Media Playback with Record
capabilities. Sum the results for all functionalities applicable to the UUT.
Ptv, Ppiayback and PReCord are power levels in Watts as measured according to the ENERGY STAR test
procedure.
2
kWHpiay/Record = 0-365 X^(Pmod(, - PTy ) X Hmoi e
1
Table 3: Duty Cycle
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DVR
Removable
Removable
Additional

(Hours/Day)
Media
Media
Tuner


Playback
Playback w/
Usage


(Hours/Day)
Record




capability

Mode


(Hours/Day)

Hours On-Playback
2
2
2
1
(H Playback)




Hours On-Record
3
0
1
2
(H Record)




Example:
(E) Consider the Cable STB with DVR product in example (C) above with a PTV of 24.0 Watts. Following
the test procedure, it is found that Ppiayback is 30.0 Watts and PreCord is 32.0 Watts
	kWhpiay/Record = 0.365 * ((30.0 - 24.0) * 2 + (32.0 - 24.0) * 3) = 13.1 kWh/yr	
Note: EPA arrived at the preceding Duty Cycle figures in Table 3 based on conversations with industry,
recent press reports, Neilson data, and professional judgment.
E) Total Energy Consumption
If the STB includes a DVR, Removable Media Playback, or Removable Media Playback with Record
capability, add the results of Equation 1 and Equation 2. If the STB does not include DVR, Removable
Media Playback, or Removable Media Playback w/ Record capability, the TEC is equal to Equation 1.
Example:
(F) In the case of a STB with a DVR, Removable Media Playback, Removable Media Playback with
Record capability, the TEC would be the sum of Equation 1, and Equation 2 (188.3 + 13.1) for a total
of 201.4 kWh/yr for this STB. This product would not meet the ENERGY STAR requirements. If,
however, the product had auto power down capability, the TEC would be 186.1 kWh/yr (173 + 13.1)
and the product would qualify for ENERGY STAR.	
Note: Draft 2 Section 4(E) Electronic Program Guide and System Update Requirements has been
removed. The maximum allowable time for exiting Sleep is intended to apply only in a case where a
manufacturer claims an auto power down capability and uses equation "b" for the base assessment in
section 4 (C)(b). Note: the term "Standby" has been replaced with "Sleep" throughout this draft of the
specification.	
F) Auto Power Down
Auto power down capability is not a requirement under this specification. However, credit for anticipated
energy savings for STBs that include auto power down capability is provided in Section C: Equation 1:
Base Assessment - if the requirements in this subsection (F) are met.
When claiming the presence of Auto Power Down functionality for purposes of using equation 1 b (Section
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638	C: Equation 1: Base Assessment) and calculating the TEC, the following requirements must be met:
639
640	1. The STB must be shipped from the manufacturer with the auto power down setting engaging at
641	four hours or less of inactivity. It is acceptable for the current program to complete before
642	switching to the Sleep state. The energy-related settings shipped as the default by the
643	manufacturer shall persist unless the user chooses at a later date to manually: a) disable the auto
644	power down, or b) adjust the default time period from four hours or less to some other value.
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/Vote; Based on stakeholder comment, the requirement that default energy-related settings "shall not
be capable of being altered during the initial user set-up process and..." has been removed. EPA
recognizes that in many, if not the majority of cases, the STB will be configured to meet a subscriber's
needs at the time of installation of the STB by an installer working for the service provider.	
2. The STB may exit an automatically-initiated Seep mode in order to scan for program and system
information, scheduling information, or any other maintenance activity. If this occurs, the STB
may exit the Sleep mode for no longer than two hours in a twenty-four (24) hour period that the
device would otherwise remain in Sleep mode.
G) Submittal of Qualified Product Data to EPA
Partners are required to report data on those models that meet the ENERGY STAR guidelines to EPA.
The test results must be reported to EPA using the Set-top Box Version 2.0 Qualifying Product Information
(QPI) Form or Online Product Submittal Tool (OPS).
5) User Interface: Although not mandatory, manufacturers are strongly recommended to design
products in accordance with the Power Control User Interface Standard — IEEE 1621 (formally known as
"Standard for User Interface Elements in Power Control of Electronic Devices Employed in
Office/Consumer Environments"). Compliance with IEEE 1621 will make power controls more
consistent and intuitive across all electronic devices. For more information on the standard, see
http://eetd.LBL.gov/Controls.
6) Effective Date: The date that manufacturers may begin to qualify products as ENERGY STAR
under this Version 2.0 specification will be defined as the effective date of the agreement. The ENERGY
STAR specification for STBs (Version 2.0) Tier 1 is effective December 15, 2008. Tier 2 will become
effective on December 15, 2010. Any previously executed agreement on the subject of ENERGY STAR
qualified set-top boxes terminated effective February 2, 2005.
1.	Qualifying and Marking products under the Tier 1 Version 2.0 specification: All products, including
models originally qualified under Version 1.0, with a date of manufacture on or after December 15,
2008, must meet the new (Version 2.0) requirements in order to qualify for ENERGY STAR. The
date of manufacture is specific to each unit and is the date (e.g., month and year) on which a unit
is considered to be completely assembled.
2.	Qualifying and Marking products under the Tier 2 Version 2.0 specification: All products, including
models originally qualified under Tier 1 Version 2.0, with a date of manufacture on or after
December 15, 2010, must meet the Tier 2 requirements in order to qualify for ENERGY STAR.
3.	Elimination of Grandfathering: EPA will not allow grandfathering under this Version 2.0 ENERGY
STAR specification. ENERGY STAR qualification under previous Versions is not
automatically granted for the life of the product model. Therefore, any product sold,
marketed, or identified by the manufacturing partner as ENERGY STAR must meet the current
specification in effect at the time of manufacture of the product.
7) Future Specification Revisions: EPA reserves the right to revise the specification should
technological and/or market changes affect its usefulness to consumers or industry or its impact on the
environment. In keeping with current policy, revisions to the specification will be discussed with
stakeholders. In the event of a specification revision, please note that ENERGY STAR qualification is not
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698	automatically granted for the life of a product model. To qualify as ENERGY STAR, a product model must
699	meet the ENERGY STAR specification in effect on the model's date of manufacture.
700
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