Homepage - RF Cafe
Webmaster: Kirt Blattenberger | KB3UON | Sitemap | ©1996-2014     Visit RF Cafe on
      Menu below is just a small sample of what is here!          Visit RF Cafe on Facebook Visit RF Cafe on Twitter Visit RF Cafe on LinkedIn
Custom Search
More than 10,000 searchable pages indexed.
•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

FCC Part 15 Radio Frequency Devices
Section 15.117

The Federal Communications Commission (FCC) is the authority in the United States of America that creates and enforces the use of airwaves throughout the entire radio frequency spectrum. This group of documents contains the entirety of the FCC Part 15 regulations that concern unlicensed radio frequency devices. As with all government documents, this material is in the public domain and may be freely copied so long as the content is not changed. This copy is provided as a convenience for RF Cafe visitors. 

Click here for the Table of Contents.
[Code of Federal Regulations]
[Title 47, Volume 1]
[Revised as of October 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR15.117]
[Page 774-776]
 
                       TITLE 47--TELECOMMUNICATION
 
              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION
 
PART 15_RADIO FREQUENCY DEVICES--Table of Contents
 
                    Subpart B_Unintentional Radiators
 
Sec. 15.117  TV broadcast receivers.
    (a) All TV broadcast receivers shipped in interstate commerce or 
imported into the United States, for sale or resale to the public, shall 
comply with the provisions of this section, except that paragraphs (f) 
and (g) of this section shall not apply to the features of such sets 
that provide for reception of digital television signals. The reference 
in this section to TV broadcast receivers also includes devices, such as 
TV interface devices and set-top devices that are intended to provide 
audio-video signals to a video monitor, that incorporate the tuner 
portion of a TV broadcast receiver and that are equipped with an antenna 
or antenna terminals that can be used for off-the-air reception of TV 
broadcast signals, as authorized under part 73 of this chapter.
    (b) TV broadcast receivers shall be capable of adequately receiving 
all channels allocated by the Commission to the television broadcast 
service.
    (c) On a given receiver, use of the UHF and VHF tuning systems shall 
provide approximately the same degree of tuning accuracy with 
approximately the same expenditure of time and effort: Provided, 
however, That this requirement will be considered to be met if the need 
for routine fine tuning is eliminated on UHF channels.
    (1) Basic tuning mechanism. If a TV broadcast receiver is equipped 
to provide for repeated access to VHF television channels at discrete 
tuning positions, that receiver shall be equipped to provide for 
repeated access to a minimum of six UHF television channels at discrete 
tuning positions. Unless a discrete tuning position is provided for each 
channel allocated to UHF television, each position shall be readily 
adjustable to a particular UHF channel by the user without the use of 
tools. If 12 or fewer discrete tuning positions are provided, each 
position shall be adjustable to receive any channel allocated to UHF 
television.
 
    Note: The combination of detented rotary switch and pushbutton 
controls is acceptable, provided UHF channels, after their initial 
selection, can be accurately tuned with an expenditure of time and 
effort approximately the same as that used in accurately tuning VHF 
channels. A UHF tuning system comprising five pushbuttons and a separate 
manual tuning knob is considered to provide repeated access to six 
channels at discrete tuning positions. A one-knob (VHF/UHF) tuning 
system providing repeated access to 11 or more discrete tuning positions 
is also acceptable, provided each of the tuning positions is readily 
adjustable, without the use of tools, to receive any UHF channel.
    (2) Tuning controls and channel readout. UHF tuning controls and 
channel readout on a given receiver shall be comparable in size, 
location, accessibility and legibility to VHF controls and readout on 
that receiver.
    Note: Differences between UHF and VHF channel readout that follow 
directly from the larger number of UHF television channels available are 
acceptable if it is clear that a good faith effort to comply with the 
provisions of this section has been made.
    (d) If equipment and controls that tend to simplify, expedite or 
perfect the reception of television signals (e.g., AFC, visual aids, 
remote control, or signal seeking capability referred to generally as 
tuning aids) are incorporated into the VHF portion of a TV broadcast 
receiver, tuning aids of the same type and comparable capability and 
quality shall be provided for the UHF portion of that receiver.
    (e) If a television receiver has an antenna affixed to the VHF 
antenna terminals, it must have an antenna designed for and capable of 
receiving all UHF television channels affixed to the UHF antenna 
terminals. If a VHF antenna is provided with but not affixed to a 
receiver, a UHF antenna shall be provided with the receiver.
    (f) The picture sensitivity of a TV broadcast receiver averaged for 
all channels between 14 and 69 inclusive shall not be more than 8dB 
larger than the peak picture sensitivity of that receiver averaged for 
all channels between 2 and 13 inclusive.
    (g) The noise figure for any television channel 14 to 69 inclusive 
shall not exceed 14 dB. A TV receiver model is considered to comply with 
this noise figure if the maximum noise figure for channels 14-69 
inclusive of 97.5% of all receivers within that model does not exceed 14 
dB.
    (1) The responsible party shall measure the noise figure of a number 
of UHF channels of the test sample to
[[Page 775]]
give reasonable assurance that the UHF noise figure for each channel 
complies with the above limit.
    (2) The responsible party shall insert in his files a statement 
explaining the basis on which it will rely to ensure that at least 97.5% 
of all production units of the test sample that are manufactured have a 
noise figure of no greater than 14 dB.
    (3) [Reserved]
    (4) In the case of a TV tuner built-in as part of a video tape 
recorder that uses a power splitter between the antenna terminals of the 
video tape recorder and the input terminals of the TV tuner or a TV 
broadcast receiver that uses a power splitter between the antenna 
terminals of two or more UHF tuners contained within that receiver, 4 dB 
may be subtracted from the noise figure measured at the antenna 
terminals of the video tape recorder or TV broadcast receiver for 
determining compliance of the UHF tuner(s) with the 14 dB noise figure 
limit.
    (h) Digital television reception capability. TV broadcast receivers 
are required only to provide useable picture and sound commensurate with 
their video and audio capabilities when receiving digital television 
signals.
    (i) Digital television reception capability implementation schedule. 
(1) Responsible parties, as defined in Sec. 2.909 of this chapter, are 
required to equip new TV broadcast receivers that are shipped in 
interstate commerce or imported from any foreign country into the United 
States and for which they are responsible to comply with the provisions 
of this section in accordance with the following schedule:
    (i) Receivers with screen sizes 36 and above--50% of all 
of a responsible party's units must include DTV tuners effective July 1, 
2004; 100% of such units must include DTV tuners effective July 1, 2005.
    (ii) Receivers with screen sizes 25 to less than 
36--50% of all of a responsible party's units must include 
DTV tuners effective July 1, 2005; 100% of such units must include DTV 
tuners effective March 1, 2006.
    (iii) Receivers with screen sizes less than 25[sec]--100% of all 
such units must include DTV tuners effective March 1, 2007.
    (iv) Other video devices (videocassette recorders (VCRs), digital 
video recorders such as hard drive and DVD recorders, etc.) that receive 
television signals--100% of all such units must include DTV tuners 
effective March 1, 2007.
    (2) For purposes of this implementation schedule, screen sizes are 
to be measured diagonally across the picture viewing area.
    (3) Responsible parties may include combinations of DTV monitors and 
set-top DTV tuners in meeting the required percentages of units with a 
DTV tuner if such combinations are marketed together with a single 
price.
    (4) The requirement to include digital television reception 
capability in new TV broadcast receivers does not apply to devices such 
as mobile telephones and personal digital assistants where such devices 
do not include the capability to receive TV service on the frequencies 
allocated for broadcast television service.
    (j) For a TV broadcast receiver equipped with a cable input selector 
switch, the selector switch shall provide, in any of its set positions, 
isolation between the antenna and cable input terminals of at least 80 
dB from 54 MHz to 216 MHz, at least 60 dB from 216 MHz to 550 MHz and at 
least 55 dB from 550 MHz to 806 MHz. The 80 dB standard applies at 216 
MHz and the 60 dB standard applies at 550 MHz. In the case of a selector 
switch requiring a power source, the required isolation shall be 
maintained in the event the device is not connected to a power source or 
power is interrupted. An actual switch that can alternate between 
reception of cable television service and an antenna is not required for 
a TV broadcast receiver, provided compliance with the isolation 
requirement specified in this paragraph can be demonstrated and the 
circuitry following the antenna input terminal(s) has sufficient band-
width to allow the reception of all TV broadcast channels authorized 
under this chapter. The provisions of this paragraph regarding 
frequencies in the range 550 MHz to 806 MHz are applicable as of June 
30, 1997.
    (k) The following requirements apply to all responsible parties, as 
defined in Sec. 2.909 of this chapter, and any person
[[Page 776]]
that displays or offers for sale or rent television receiving equipment 
that is not capable of receiving, decoding and tuning digital signals.
    (1) Such parties and persons shall place conspicuously and in close 
proximity to such television broadcast receivers a sign containing, in 
clear and conspicuous print, the Consumer Alert disclosure text required 
by paragraph (k)(3) of this section. The text should be in a size of 
type large enough to be clear, conspicuous and readily legible, 
consistent with the dimensions of the equipment and the label. The 
information may be printed on a transparent material and affixed to the 
screen, if the receiver includes a display, in a manner that is 
removable by the consumer and does not obscure the picture, or, if the 
receiver does not include a display, in a prominent location on the 
device, such as on the top or front of the device, when displayed for 
sale, or the information in this format may be displayed separately 
immediately adjacent to each television broadcast receiver offered for 
sale and clearly associated with the analog-only model to which it 
pertains.
    (2) If such parties and persons display or offer for sale or rent 
such television broadcast receivers via direct mail, catalog, or 
electronic means, they shall prominently display in close proximity to 
the images or descriptions of such television broadcast receivers, in 
clear and conspicuous print, the Consumer Alert disclosure text required 
by paragraph (k)(3) of this section. The text should be in a size large 
enough to be clear, conspicuous, and readily legible, consistent with 
the dimensions of the advertisement or description.
    (3) Consumer alert. This television receiver has only an analog 
broadcast tuner and will require a converter box after February 17, 
2009, to receive over-the-air broadcasts with an antenna because of the 
Nation's transition to digital broadcasting. Analog-only TVs should 
continue to work as before with cable and satellite TV services, gaming 
consoles, VCRs, DVD players, and similar products. For more information, 
call the Federal Communications Commission at 1-888-225-5322 (TTY: 1-
888-835-5322) or visit the Commission's digital television Web site at: 
http://www.dtv.gov.
[54 FR 17714, Apr. 25, 1993, as amended at 59 FR 25341, May 16, 1994; 61 
FR 30532, June 17, 1996; 67 FR 63294, Oct. 11, 2002; 70 FR 38804, July 
6, 2005; 70 FR 75743, Dec. 21, 2005; 72 FR 26560, May 10, 2007; 73 FR 
5681, Jan. 30, 2008]



A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
Your RF Cafe Progenitor & Webmaster
Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an
                                 engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem! (Seize the Day!)

5CCG (5th MOB): My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website