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 TM 11-6625-3056-12
3-2.
SETUP (cont)
5
TD-660
Set front-panel screwdriver-operated controls as follows:
POWER
ON (toggle switch)
MODE
12 CH (or 6 CH)
AUX
OUT
2 WIRE/4 WIRE
4 WIRE
MASTER SLAVE
MASTER
6
TD-1065
Set POWER to ON.
3-3.
ERROR MEASUREMENTS
General
To measure errors, if any, introduced by the TD-1065, proceed as follows:
Setup
Refer to paragraph 3-2.
Procedure
Set TS-3981 controls as follows:
POWER
ON
PATTERN
LONG
OPERATION
4W
CORRELATOR LOOP
OPEN
DATA ON/OFF
ON
RATE SELECT
7 (32 kb/s)
DISPLAY SELECT
ERRORS
ACTIVITY indicator will be lit.
Press RESET:
Display will read 0.
If display does not stay at 0 and increases count rapidly, turn DATA ON/OFF back and forth
between ON and OFF several times. If display still increases count rapidly, polarity of DATA
OUT and/or DATA IN connections may be reversed. Reconnect with opposite polarity and
repeat procedure.
Press SINGLE ERROR several times.
Display will advance 1 count each time SINGLE ERROR is pressed.
Press RESET:
Display will read 0. Display will remain 0 or a very low count if channel under test is operating
properly. If display increases count rapidly, channel is faulty.
3-4
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