§ 15.118   Cable ready consumer electronics equipment.

   (a) All consumer electronics TV receiving equipment marketed in the United
   States as cable ready or cable compatible shall comply with the provisions
   of this section. Consumer electronics TV receiving equipment that includes
   features intended for use with cable service but does not fully comply with
   the provisions of this section are subject to the labelling requirements of
   § 15.19(d). Until such time as generally accepted testing standards are
   developed, paragraphs (c) and (d) of this section will apply only to the
   analog portion of covered consumer electronics TV receiving equipment

   (b) Cable ready consumer electronics equipment shall be capable of receiving
   all NTSC or similar video channels on channels 1 through 125 of the channel
   allocation plan set forth in CEA-542-B: “CEA Standard: Cable Television
   Channel Identification Plan,” (incorporated by reference, see § 15.38).

   (c) Cable ready consumer electronics equipment must meet the following
   technical performance requirements. Compliance with these requirements shall
   be determined by performing measurements at the unfiltered IF output port.
   Where  appropriate,  the Commission will consider allowing alternative
   measurement methods.

   (1) Adjacent channel interference. In the presence of a lower adjacent
   channel  CW signal that is 1.5 MHz below the desired visual carrier in
   frequency and 10 dB below the desired visual carrier in amplitude, spurious
   signals within the IF passband shall be attenuated at least 55 dB below the
   visual carrier of the desired signal. The desired input signal shall be an
   NTSC visual carrier modulated with a 10 IRE flat field with color burst and
   the  aural  carrier  which is 10 dB below the visual carrier should be
   unmodulated. Measurements are to be performed for input signal levels of 0
   dBmV and + 15 dBmV, with the receiver tuned to ten evenly spaced EIA IS-132
   channels covering the band 54 MHz to 804 MHz.

   (2) Image channel interference. Image channel interference within the IF
   passband shall be attenuated below the visual carrier of the desired channel
   by at least 60 dB from 54 MHz to 714 MHz and 50 dB from 714 MHz to 804 MHz.
   The 60 dB standard applies at 714 MHz. In testing for compliance with this
   standard, the desired input signal is to be an NTSC signal on which the
   visual carrier is modulated with a 10 IRE flat field with color burst and
   the aural carrier is unmodulated and 10 dB below the visual carrier. The
   undesired test signal shall be a CW signal equal in amplitude to the desired
   visual carrier and located 90 MHz above the visual carrier frequency of the
   desired channel. Measurements shall be performed for input signals of 0 dBmV
   and + 15 dBmV, with the receiver tuned to at least ten evenly spaced EIA
   IS-132 channels covering the band 54 MHz to 804 MHz.

   (3) Direct pickup interference. The direct pickup (DPU) of a co-channel
   interfering ambient field by a cable ready device shall not exceed the
   following criteria. The ratio of the desired to undesired signal levels at
   the IF passband on each channel shall be at least 45 dB. The average ratio
   over the six channels shall be at least 50 dB. The desired input signal
   shall be an NTSC signal having a visual carrier level of 0 dBmV. The visual
   carrier is modulated with a 10 IRE flat field with color burst, visual to
   aural carrier ratio of 10 dB, aural carrier unmodulated. The equipment under
   test (EUT) shall be placed on a rotatable table that is one meter in height.
   Any excess length of the power cord and other connecting leads shall be
   coiled  on  the  floor under the table. The EUT shall be immersed in a
   horizontally polarized uniform CW field of 100 mV/m at a frequency 2.55 MHz
   above the visual carrier of the EUT tuned channel. Measurements shall be
   made with the EUT tuned to six EIA IS-132 channels, two each in the low VHF,
   high VHF and UHF broadcast bands. On each channel, the levels at the IF
   passband due to the desired and interfering signals are to be measured.

   (4)  Tuner  overload. Spurious signals within the IF passband shall be
   attenuated at least 55 dB below the visual carrier of the desired channel
   using  a  comb-like  spectrum  input  with  each visual carrier signal
   individually set at + 15 dBmV from 54 to 550 MHz. The desired input signal
   is to be an NTSC signal on which the visual carrier is modulated with a 10
   IRE flat field with color burst and the aural carrier is unmodulated and 10
   dB below the visual carrier. Measurements shall be made with the receiver
   tuned to at least seven evenly spaced EIA IS-132 channels covering the band
   54 MHz to 550 MHz. In addition, spurious signals within the IF passband
   shall be attenuated at least 51 dB below the visual carrier of the desired
   channel using a comb spectrum input with each signal individually set at +
   15 dBmV from 550 to 804 MHz. Measurements shall be made with the receiver
   tuned to at least three evenly spaced EIA IS-132 channels covering the band
   550 MHz to 804 MHz.

   (5) Cable input conducted emissions. (i) Conducted spurious emissions that
   appear at the cable input to the device must meet the following criteria.
   The input shall be an NTSC video carrier modulated with a 10 IRE flat field
   with color burst at a level of 0 dBmV and with a visual to aural ratio of 10
   dB. The aural carrier shall be unmodulated. The peak level of the spurious
   signals  will  be  measured  using  a spectrum analyzer connected by a
   directional coupler to the cable input of the equipment under test. Spurious
   signal levels must not exceed the limits in the following table:

   From 54 MHz up to and including 300 MHz-26 dBmV

   From 300 MHz up to and including 450 MHz-20 dBmV

   From 450 MHz up to and including 804 MHz-15 dBmV

   (ii) The average of the measurements on multiple channels from 450 MHz up to
   and including 804 MHz shall be no greater than -20 dBmV. Measurements shall
   be made with the receiver tuned to at least four EIA IS-132 channels in each
   of the above bands. The test channels are to be evenly distributed across
   each of the bands. Measurements for conducted emissions caused by sources
   internal to the device are to be made in a shielded room. Measurements for
   conducted emissions caused by external signal sources shall be made in an
   ambient RF field whose field strength is 100 mV/m, following the same test
   conditions as described in paragraph (c)(3) of this section.

   (d) The field strength of radiated emissions from cable ready consumer
   electronics  equipment  shall not exceed the limits in § 15.109(a) when
   measured in accordance with the applicable procedures specified in § § 15.31
   and 15.35 for unintentional radiators, with the following modifications.
   During testing the NTSC input signal level is to be + 15 dBmV, with a visual
   to aural ratio of 10 dB. The visual carrier is to be modulated by a 10 IRE
   flat  field  with color burst; the aural carrier is to be unmodulated.
   Measurements are to be taken on six EIA IS-132 channels evenly spaced across
   the required RF input range of the equipment under test.

   [ 59 FR 25341 , May 16, 1994, as amended at  61 FR 18509 , Apr. 26, 1996;  65 FR 64391 , Oct. 27, 2000;  68 FR 68546 , Dec. 9, 2003;  69 FR 2849 , Jan. 21, 2004;
    69 FR 57861 , Sept. 28, 2004;  77 FR 4913 , Feb. 1, 2012]

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