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A.3.
A.4.
29
Connections
— Ensure that the mains voltage switch S12 is set to the appropriate mains voltage.
— Connect the PM 5775 (PM 5776) to the mains. Depress switch POWER ON, S11,
switch on the oscilloscope and let the instruments warm up for about
10 minutes before proceeding.
Note: The instructions below refer to PM 5775, but are also applicable to
PM 5776. Just connect the second PULSE OUT socket, P6, to channel B of
the oscilloscope and exercise the same procedure as described for channel A.
— Connect the pulse-generator output PULSE OUT, P3, to input A of the
oscilloscope via a 50
coaxial cable and a 20 dB attenuator (e.g. General Radio
Type GR 874 G20).
— Connect the pulse-generator output SYNC. OUT, P2, to the TRIGG.IN connector
of the oscilloscope via a 50
coaxial cable and a 20 dB attenuator (e.g.
Texscan type FP50 BNC outline A).
— Turn the SENSITIVITY control to the TRIGG. range. Keep turning until a
stable display is obtained.
Controls REPETITION TIME, DELAY and WIDTH
Repetition time, delay time and pulse width are defined in Fig. VI-2, which also
shows the correct relationship between them.
Repetition time, delay time and pulse width correspond approximately to the
indicated values when the FINE controls RV1-RV2-RV3 are set to the black dots.
These dots do not coincide with the lowest position of the FINE controls to ensure
overlap.
td
|
T
I
ht
os
mi
ag 43t
tds DELAY
TIME
td<T
tws PULSE WIDTH
tw<T
T =
REPETITION
TIME
Fig. V1-2. Time settings at single-pulse operation
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