UN17
UN17/4
UN17/501
UN17/502
UN17/503
UN17/504
UN17/507
UN17/508
UN17/509
UN17/510
UN17/511
UN17/512
UN17/513
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with a tone wheel
WI THDRAWN .
tachogenerator.
type
DD 1966.
Variable Speed Motor Control Unit used with UN17/3 in
EP4/2. Consists of servo electronics, mains operated, in
metal box 3l8mm x 178mm x l78mm with cables for connection
to UN17/3, the variable speed control potentiometer and
a.c. mains. DD 1966. WITHDRAWN.
Variable Divider Unit used in
Includes 15 UN9/528. CH1/26A,
DD Spec 10.25. ACO. OBSOLESCENT.
GEl/520 and
pegs 12, 26.
C02L/537.
DD 1964.
Fixed Divider Unit used in GEl/520 and C02L/537. Includes
8
UN9/528.
CH1/26A,
pegs
12,
28.
DD 1964.
DD Spec 10.26. ACO. OBSOLESCENT.
Picture and Field Unit used in GEl/520. CHl/26A with 10
UN9/528. DD 1964. DD Spec 10.2. ACO. OBSOLESCENT.
Control Unit used in GEl/520 for local and
of phase. CHl/12A, pegs 12, 13. DD 1964.
ACO. OBSOLESCENT.
remote control
DD Spec 10.2.
Audio Encoder Unit used in GE1/523. Codes logic signals
from UN17/506 into audio tones for transmission to remote
television waveform
source.
CH1/26A,
pegs
13,
22.
DD 1964. DD Spec 10.7. ACO. OBSOLESCENT.
Audio Decoder Unit associated with GEl/520 in the Error
Controlled Slavelock System. Coded tone signals from
UN17/507 at the master station are decoded to produce d.c.
binary sense signals to control the GEl/520 at the remote
source. Superseded by CD3/50l for colour working.
CHl/26B, pegs 13, 24. DD 1964. DD Spec 10.10. ACO.
OBSOLESCENT.
Oscillator Correction Unit used in the Nat10ck
synchronising system to provide electrical adjustment of
frequency of OS2/505 type oscillators. Comprises a
motorised
variable
resistor
controlled
from
the
oscillator. Mains operated. CHl/26B, pegs 13, 19.
DD 1965. DD Spec 10.11. ACO. OBSOLESCENT.
Synchronising Unit used in C04/505. CHl/26A, pegs 13, 23.
DD 1965. OBSOLESCENT.
Synchronising Unit used in C04/504. Includes 15 UN9/528.
CHl/26A, pegs 13, 25. DD 1965. OBSOLESCENT.
Pulse Clipper Sync Unit for re-shaping sync pulses prior
to mixing with non-composite sawtooth waveform for line-up
purposes
at
Television
Centre.
CH1/12A.
DD 1966.
WITHDRAWN.
Subcarrier Synchronising Unit used with Ampex VR2000 video
tape colour machines when working on PAL system.
Processes the reference sub carrier feed so that it is

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