Waveforms - Wavetek 143 Instruction Manual

example. Example 2 shows that with a positive VCG input,
output frequency is increased. Example 3 shows that with a
negative VCG input, output frequency is decreased. (Note
that the Output Frequency Factor column value must be
multiplied by a frequency range multiplier to give the actual
output frequency.)
NOTE
The frequency vernier must be rotated fully
ccw for 1000: 1 range.
Nonlinear operation results when the VCG input
voltage is excessive; that is, when the attempted
generator frequency exceeds the range setting
TRIG IN (GATE MOOE)
GENERATOR BASIC '\,
WAVEFORM (NOT OUTPUT)
GENERATOR BASIC
11..i
WAVEFORM (NOT OUTPUT)
SYNC OUT
(2 times the multiplier setting) or in the other
direction, 1 /1000th of the range setting.
The up to 1000: 1 VCG sweep of the generator frequencies
available in each range results from a 2V excursion at the
VCG IN connector. With the frequency dial set to 2.0, ex·
cursions between
-2V
and
OV
at
VCG
IN provide the up
to
1000: 1 frequency sweep. With the dial set to .002, excur-
sions between OV and +2V at VCG IN provide the up to
1ODO:1 sweep within the set frequency range.
3.2.3 Waveforms
See figure 3-5 for definition of controllable waveform
characteristics.
TRIGGER LEVEL
!+--GATE WIDTH--!
t
I I I
~
1-t:L____n__
OUTPUT AMPLIFIER FIXED DELAY-+j
j+-
NOTES
FUNCTION
OUT
'\,,OFFSET
'\;,OFFSET
_n_
u
TRIGGERED
'\J
START/STOP:
ov=-1uuul_
I
ov~
I
OV~
1. Period is controlled by the generator frequency setting.
2. In trigger mode.just one period is generated for each trigger pulse.
3. DC offset plus peak waveform voltage
>
I
7.5V
I
causes waveform clipping.
Figure 3-5. Waveform Characteristics
3-4