FL040064 FL4/64A-L
FL4/64M
FL040064 FL4/64N
FL040065 FL4/65A-L
FL040065 FL4/65N
FL040066 FL4/66
FL040067 FL4/67
FL040068 FL4/68A»B
required.
2.438(77).
Supersedes FL4/33 and FL4/39A.
DDHB 2.436(78).
DD 1977.
DDMI
Lowpass Filter on a plug-in card which is part of the
MD3/10 Tone Modulator. The filter removes programme at the
individual
tone
frequencies.
The
fc
of
the
filter
corresponds to the suffix, Le. 'A' fo 6.lkHz, ' B' for
7.lkHz up to 'L' for 16 .1kHz . Through hole plated board
approximately 50mm x l25mm. DD 1977. DDMI 6.32 0(78).
Low Pass Filter. Standard FL4/64D with IC1 (tone generator
for 9.6KHz) removed and tone 2 frequency re-adjusted to
9.7KHz instead of 9.8KHz. Used when converting MD3/10 for
FM tone at 9. 7KHz for IF radiodata distribution. Power
requirements !12V obtained from MD3/10.
Pcb approx.
SO x 125mm. Parent equipment MD3/10B, EP2M/7. RD 1984.
Low Pass Filter. This plug-in card is a modification of
the FL4/64A-L Low Pass Filter, where the suffix corresponds
to cutoffs ranging from 6.1 kHz for 'A' to 16.1 kHz for
'L'. This unit has the cutoff set at 5.1 kHz in order to
remove programme at the tone frequencies of 5.6 and 5.8kHz.
Power requirements :t12V (30 mA). PCB approx. 50x125mm.
Parent equipment MD3/10. D & ED (A) 1987.
Lowpass Filter on a plug-in card which is part of the DM3/5
Tone Demodulator.
The filter removes programme at the
individual
tone
frequencies.
The
fc
of
the
filter
corresponds to the suffix, Le. 'A' for 6.lkHz, 'B' for
7.lkHz up to 'L' for 16 .1kHz . Through hole plated board
approximately 50mm x l25mm. DD 1977. DDMI 6.321(78).
Low Pass Filter. This plug-in card is a modification of
the FL4/65A-L low-pass filter used when receiving
signalling tones. The suffix corresponds to cutoff
frequencies ranging from 6.1 kHz for 'A' to 16.1 kHz for
'L'. This card has a programme cutoff frequency of 5.1
kHz, in order to allow separation of signalling tones at
5.6 and 5.8 kHz. Power requirements :t12V (SOmA). Parent
equipment DM3/5. D & ED (A) 1987.
Scratch Filter. A remotely switched filter giving
l8dB/octave top-cut at 4 or 8kHz. Filter can also be
switched out to give flat response. Power requirements
!15V
22mA,
+5V
30mA.
2U
unsupported
card.
Parent
equipment RP2/10. DD 1977.
Monophonic De-emphasis Filter which accepts a IV p_p
multiplex input, and provides a 50~s, de-emphasis response
together with 15kHz low pass filtering. The resulting
monophonic output (A+B) appears at +lOdB unbalanced» from a
low impedance source ( 50Q). Power requirements +18v _
5.2V. CHl.64A. Parent equipment RC5L/11. DD 1978. DDMI
5.426(83).
NICAM 3 Low-pass Filter. Provides low pass filtering for
NICAM 3 equipment.
Basic version incorporarates NE4/3
Limiter Delay Line for use when AM6/23 is required. 'A'
version is filter alone. Both versions incorporate CCITT
pre-emphasis. Power requirements !15V. 4UU BMM J card
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