Dual 7 kHz Output Filter. A 7 kHz two-channel anti-imaging
filter for use with a 16 kHz sampled DAC system. It
includes an electronic input balance and equalisation for
sin x correction.
Maximum output level +20 dB (0.775 V). Power Requirements
!18 Vt 150 mA each. 4 U Unsupported Card with Front Panel.
Chassis extender CH4/s. DD(3) 1986. DDHB 3.333(85).
Line Protection Panel. EMP and Lightning Protection Panel
for 30-line pairs between bays or groups of bays. Chassis
dimensions: 1 Ut 17.5" x 4.5" (445 mm x 114 mm). TCPD
Digital Key Filter. Two-channel s-tap digital key filter
for use in digital video mixers. Fil ter responses are
selectable for luminance or chrominance characteristics.
Also provides a 'Border' key output. Power requirements:
5 V t "'3 A. Chassis: 6 U triple-depth Eurocard. Chassis
extender: CH4/13. D & ED (V) 1986.
Analogue Filter. This unit forms part of the Digital
Stereo Sound with Terrestrial Television Decoder. The unit
provides suitable active low-pass filtering for two
independent audio channelst to remove the sampling effects
of digitised audio signals t after reconstruction of the
analogue waveforms by the audio DACs. The unit has
duplicated circuitry to handle 2 audio channelst and
provides outputs suitable for driving 600Q loads. Power
CH1A/43. Parent equipment CD3SM/s4. RD 1987.
Data and Low Pass Filter. This unit rejects stereophononic
signals t but passes monophonic and data (57kHz) signals.
Diecast box 49x9sx14smm. TCPD 1987.
Analogue Filter. This filter is used in the CD3SM/s4 and
CD3SM/s7 728kbit/sec Stereo Sound with Television Decoders.
The unit provides suitable active low-pass filtering for
two independent audio channelst to remove the sampling
effects of digitised audio signals after reconstruction of
the analogue waveforms by the audio DACs t C09S/12. The
unit has duplicated circuitry to handle two audio channelst
and provides outputs suitable for driving 600Q loads. The
output has been increased to +16dBm compared to the +12dBm
of the FL4/86. Power requirements !lsV. CH1/64A. Parent
equipment CD3SM/s4 and CD3SM/s7. Chassis extender CH1A/43.
Lowpass Filter. Part of Teletext regenerator and AM18/s24
Teletext pulse stabilising amplifier. Filters TTL data to
produce required output pulse shape. Built as plug-in
cardt mounted on AM18/s24. DD 1976. DDMI 6.315(77).
l~s Shaping Low-pass Filter. l~s sine-squared shaping
networkt 300Q impedance. Constructed on a printed circuit
board with plug in pins to fit socket mounted on a larger
printed circuit board. DD 1977. DDMI 9. 252(79).