GE4
GE4/542
GE4/545
GE4/546
GE4/547
GE4M/549
GE4M/550
GE4M/556B
GE4M/556C
GE5M/501
GE5/502
- 172
27, 37.
OBSOLESCENT.
DD 1969.
DD Spec 9.120.
DDHB 9.96.
Pulse and Bar Generator, 405 line, used in GE6M/517.
Basically a combination of GE4/516B and GE2/548. CH1/26A,
pegs 47, 60. DD 1970. DD Spec 5.181. OBSOLESCENT.
Video Sweep Test Generator used in EP14/504 to provide a
sweep video frequency of 6-0-6MHz. Includes a 67.5MHz
crystal oscillator and doubler which apply 135MHz to a
diode bridge-ring mixer together with the 129MHz-141MHz
output of GE1/560. CH1/12A. DD 1970. WITHDRAWN.
Bar and Sweep Test Generator used in PAlM/560. Based on
GE4/535 but with optional internal sync sources and fixed
frequency bar for three tone testing. CH1/46A, pegs 48,
57.
DD 1970.
DD Spec 5.188.
EDI 10065(1)SEP70.
OBSOLESCENT.
Signal Test Generator used in EPlM/525 to provide a line
sawtooth waveform with variable lift and slope, and a
square-wave with a period of 8 sampling intervals, for
adjustment of C01/503. 254mm x 178mm ISEP board.
DD 1970. WITHDRAWN.
Insertion and Full Field Test Signal Generator to provide
two ITS signals during the active picture period of a
video signal, also 25~s line bar and 50Hz square wave
signals. Units in double PN3/23. DD 1972. OBSOLESCENT.
Remote Test Signal Generator, for Carlisle, Switchab1e
remotely to provide various insertion test signals. Units
in double PN3/23. DD 1972. OBSOLESCENT.
Similar to GE4M/556 with the addition of a mixing
amplifier AM1/604 to enable up to four external test or
data signals to be inserted during the field blanking
interval.
DD 1975.
DDHB 9.119.
EDI 10270(1)MAY76.
WITHDRAWN .
Similar to GE4M/556 containing both the facilities offered
by
the
A
and
B
versions.
DD 1975.
DDHB 9.119.
EDI 10270(1)MAY76. WITHDRAWN.
GE5 TELEVISION SYNCHRONISING PULSE GENERATORS
Synchronising Pulse Generator used with C04/504 in
C06/503. Consists of Ferguson Waveform Generator Type
WG71 modified to produce field information from an
external field start signal as well as normally. Includes
UN9/528. DD 1965. WITHDRAWN.
Pulse and Colour Timing Synchronising Generator. Modified

72