Philips PM 5775 Manual page 49

B.3.
B.4.
B.5.
57
Delay
— Set the controls of the pulse generator as follows:
REPETITION TIME, S1 0.5 s
DELAY, S2 10 us
DELAY FINE, RV2 fully counter-clockwise
WIDTH, S3 1 ps
WIDTH FINE, RV3 fully counter-clockwise
SINGLE-DOUBLE, S7 DOUBLE
Check that the delay time is 9 us + 3%.
If necessary, adjust RV208.
Turn vernier DELAY, RV2 fully clockwise.
Check that the delay time is 110 us + 3 %.
If necessary, adjust RV207.
Width
Connect an oscilloscope to the emitter of Z255 (R278) via a probe with at least
5 kQ input impedance.
Check that a pulse appears. If necessary adjust RV209.
Connect the instruments as shown in Fig. X-2.
Set the controls of the pulse generator as follows:
REPETITION TIME, S1 500 us
DELAY, 82 S ns
WIDTH, S3 10 us
WIDTH FINE, RV3 fully counter-clockwise
SINGLE DOUBLE, S7 SINGLE
Set the timebase-control of the counter to a position which gives an accurate
9 us read out.
Check that the pulse width is 9 us + 3 %o.
If not, adjust RV211.
Set vernier WIDTH, RV3, fully clockwise.
Check that the pulse width is 110 us + 3 %.
If not, adjust RV210.
Delay, 5 ns adjustment
— Set the controls of the pulse generator as follows:
REPETITION TIME, S1 150 ns
WIDTH, S3 5 ns
WIDTH FINE, RV3 fully counter-clockwise
DELAY, S2 5 ns
DELAY FINE, RV2 fully counter-clockwise
SINGLE DOUBLE, S7 SINGLE
— Connect an oscilloscope to the emitter of Z255 (R278) via a-probe with at least
5 kQ2 input impedance.
The oscilloscope should be triggered by the sync. pulse which is available on
socket SYNC. OUT, P2, of the pulse generator.