Philips PM 6650 Operating Manual page 25

Counter/timer 512 mhz/1ns
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2.2.
DISPLAY TEST
. Set FUNCTION to DISPLAY TEST.
. Set DISPLAY TIME to mid-position.
. Depress MEMORY
switch.
. Rotate TIME BASE/MULTIPLIER switch from 10 ns
to 1s and check units and decimal points:
TIME BASE
Read (+1 digit)
GATE lamp flashing
1
2
3
4
10 ns
0. ns
100 ns
1.0 us
x
1 us
1.00 ms
x
10 us
1.000 s
x
100 us
1.0000 GHz
x
1 ms
1.00000
MHz
x
10 ms
1.000000
kHz
x
100 ms
1.0000000
No go
x
1s
1.00000000
No go
x
5. Check character segments:
— Set TIME BASE switch to 10 s.
— Release MEMORY
switch.
29

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