TB 9-6625-2000-24
(9) Turn FM DEV AMPLITUDE control fully cw and FUNCTION switch to FM. If
oscilloscope does not indicate a symmetrical saw tooth wave (no flat bottom), perform b below.
b. Adjustments. Adjust R17 (fig. 2) for a saw tooth wave with no flat bottom (R).
13. Delayed and Undelayed
a. Performance Check
(1) Connect UNDELAYED output to oscilloscope CH 1 input and DELAYED output to
CH 2 input of oscilloscope.
(2) Set FUNCTION switch to INT
.
(3) Set SYNC DELAY control fully ccw and LOW-X1-X10-X100 switch to LOW.
(4) Adjust oscilloscope to display both pulses. Delayed pulse will be delayed 0.2 Ps or
less from undelayed pulse.
(5) Set SYNC DELAY control fully cw. Oscilloscope will indicate delayed pulse 2 Ps or
more from undelayed pulse.
(6) Set SYNC DELAY control fully ccw and LOW-X1-X10-X100 switch to X1.
Oscilloscope will show delayed pulse 2 Ps or less.
(7) Set SYNC DELAY LOW-X1-X10-X100 switch to X10. Oscilloscope will indicate
delayed pulse 20 Ps or less.
(8) Set SYNC DELAY LOW-X1-X10-X100 switch to X100. Oscilloscope will indicate
delayed pulse 200 Ps or less.
(9) Disconnect cable from DELAYED output and connect to
OUT connector.
Oscilloscope will indicate delayed pulse 200 Ps or less.
b. Adjustments. No adjustments can be made.
14. Power Supply
a. Performance Check
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
(1) Connect multimeter between pin 4 and pin 2 (common) of connector 1A4TPI (fig. 3).
If multimeter does not indicate between 2.07 and 2.53 V dc, perform b (1) below.
