Voltage Controlled Function Generator Operation - Wavetek 145 Instruction Manual

3.2.4 Voltage Controlled Function Generator Operation
Operation as a voltage controlled function generator (VCG)
is as for a manually controlled function generator, only the
frequency with in' particular range's is additionally controlled
with de levels (±2V excursions) injected at the VCG IN con-
nector. Set the frequency dial to a reference from which
the frequency is to be voltage controlled.
TRIG IN (GATE MODEi
GENERATOR BASIC
l\.t
WAVEFORM (NOT OUTPUT)
GENERATOR BASIC
r'L .
·WAVEFORM (NOT OUTPUT)
SYNC OUT
1.
For frequency control with positive de inputs at VCG
IN, set the dial for a lower frequency limit.
2. For frequency control with negative de inputs at VCG
IN, set the dial for an upper frequency limit.
3. For modulation with an ac input at VCG IN, set dial
at desired center frequency. Do not exceed th.e maxi-
mum dial range of the selected frequency range.
TRIGGER LEVEL
GATE WIDTH--+j
I
I
OUTPUT AMPLIFIER FIXED DELA·v·....i
j.-
AMPLITUDE
*
NOTES
FUNCTION
OUT
l\.t
,OFFSET
"V,OFFSET
u
TRIGGERED "V STARTISTOP:
+DC OFFSET
- DC OFFSET
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
3-6