Wavetek 164 Instruction Manual page 24

to the main generator. Therefore, a stationary waveform
display in oscilloscope is possible.
Set up the generator as in TRIG SWP mode. See
Paragraph 2.5.7.
Connect SYNC OUT to TRIG IN with a coaxial
cable.
Connect SWEEP OUT to the external trigger input of
SWEEPING UP
| GATING TIME |
TRIG IN NC tem A
an oscilloscope and set the oscilloscope trigger to
external and to negative trigger.
Adjust the TRIG LEVEL control of the generator
until the output frequency is sweeping.
It may be necessary to adjust the generator SWEEP/
STEP TIME slightly to obtain a stable display. For
best results keep the ratio of main generator fre-
quency less than 40:1.
| GATING TIME |
TRIGIN PA RANA AA AA
SWEEP TIME SWEEP TIME
SWEEP OUT
M
mc.
caus
i
spec
50Q OUT AVAVA VATAN ———ə—
(SWEEP UP BURST)
A. PREFERABLE: SWEEP TIME IS LONGER
THAN GATING TIME
Le HOLD
B. POOR: GATING TIME IS LONGER
THAN SWEEP TIME, ALLOWING
THE LAST-CYCLE TRANSIENT
TO OCCUR
502 OUT -AWWA c——
(SWEEP DOWN BURST)
C. PREFERABLE: SWEEP TIME IS LONGER
THAN GATING TIME
SWEEP TIME
== Le— HOLD
SWEEP OUT
(SWEEP DOWN BURST) '
D. POOR: GATING TIME IS LONGER
THAN SWEEP TIME, ALLOWING
THE LAST-CYCLE TRANSIENT
TO OCCUR
Figure 2-12. Sweep Burst Operation
TRIG IN Mos alos
SWEEP OUT
5062 OUT
Figure 2-13. A Special Case of Sweep Burst Operation