DM040003 DM4/3
DM040004 DM4/4
DM040005 DM4/5
DM040006 DM4/6
DM040008 DM4M/8
DM040009 DM4/9
DM040010 DM4/10
Band 11 Phase Demodulator. This unit is a sub-unit of
DM4L/2. Power requirements 100mA maximum at 12 -l5V.
CH1/64A. DD 1980. DDMI 5.382(80).
Audio Polarity Detector. Part of TE1/ 45, Audio Polarity
Tester. Indicates unambiguously presence and polarity of
test signal by lamps and audible warning device. Powered
when plug is inserted in input jack. Power requirements
Battery,
9V
PP3
type.
Plastic
case
120
x
65
x
40mm.
Parent equipment TE1/45. DD 1983. DDMI 9.325(84). DDHB
9.203(84).
676 kbit/s PSK Demodulator. Demodulates a +5dBm 70MHz
carrier bearing PSK data into two quadrature baseband
signals, suitable for decoding by a CD3/46. The 70MHz
signal must be band-pass filtered before input to this
unit. Intended for use with CD2/28, MD4/2 and CD3/46 as
part of CML link PML15. Power requirements +5V 50OmA; -15V
150mA. Unsupported P.C.B. 9" x 5" approx. DD 1983. DDMI
5.444(84). EDI 10500(1)JAN 85. EDI 10500 (1) JAN 85.
2048 kbit/s PSK Demodulator. Demodulates a 7.5 MHz carrier
bearing PSK data into two quadrature base band signals.
Suitable for decoding by a CD3/43 decoder. Intended for
use with CD2/31, MD4/5 and CD3/48.
Power requirements
+5 V, 600 mA; -5 V, 130 mA. 4U PCB mounted in a CH1/64A
chassis.
Parent
equipment
RC2L/4.
DD
1985.
EDI
10518(1)JUL85. DDMI 5.458(85).
D.S.S.T.TV Demodulator. The Digital Stereo Sound with
Terrestrial Television (DSSTTV) Demodulator accepts a
quadrature-phase-shift-keyed (QPSK) modulated carrier at an
IF of 6. 553MHz, and demodulates the signal to recover a
serial binary data-stream and associated clock signal at
728kbit/sec. The unit demodulates the input signal to
recover I & Q phase-axes data at symbol-rate (twice bit-
rate). The I & Q data are passed on to clock-recovery and
decoder circuits, which reform the serial bit-stream at
728kbit/sec, and recover the clock signal for optimum data
sampling. These clock data-signals are available as TTL
outputs, ready for the 728kbit/sec Decoder (CD3SM/54).
Power requirements 240Vac. PN3/54. Sub-units PS2/205B,
PS2/205G, CD3/55, DM4/9, FL2/32, ME4/3, UN26/97. RD 1987.
QPSK Demodulator. This unit forms part of the Digital
Stereo Sound with Terrestrial Television Demodulator. The
demodulator recovers data signals from the two orthogonal
I & Q phase-axes of the quadrature-phase-shift-keyed
digital sound signal. A reference carrier signal used for
demodulation is recovered from the filtered 6.552MHz IF
input signal, using the technique of baseband remodulation
with Costas loops. The demodulated I & Q data waveforms
are available for processing by other units within the
demodulator. Power requirements +12V (240mA), -12V
(180mA). CH1/64A. Chassis extender CH1A/43. Parent
equipment DM4M/8. RD 1987.
2048kbit/sec TFM
7.5MHz carrier,
Demodulator.
bearing TFM
This unit demodulates a
data, into two quadrature
83

83