Wavetek 164 Instruction Manual page 15

10.
After connecting the line cord to the ac line, set the
front panel controls and switches as follows:
POWER a A: Erde t u Toten min
EredquencyiDial arce:
FREO (Hz) Range ç X 1K
FREQ (Hz) VERNIER . . Fully Clockwise
SYMMETRY RR EN OFF
WAVEFORM... "Age uu utl
OUTPUNPANMENTAB)E im 0
OUTPUT ATTEN (dB) VARIABLE Fully Clockwise
DC OFFSET OFF
TRIG START/STOP GACAL
SWEEP/STEP TIME OFF
GEN MODE CONT
Connect the 5022 OUT (HI) connector with a shielded
cable terminated in a 50 ohm load to the oscilloscope
and set FREQ (Hz) VERNIER to obtain 1 kHz display
on the oscilloscope. Approximately 10 V p-p should
be displayed.
Rotate OUTPUT ATTEN (dB) VARIABLE control
full ccw. Increasing signal attenuation should be
observed. Return to full cw.
Set SLOPE control (small knob) full cw and WIDTH
control (large knob) at approximately midpoint.
Check amplitudes of sine Ay , triangle ^y and
trapezoidal '\_, waveforms. They should be approx-
imately 10 V p-p.
Use SLOPE/WIDTH control to vary the slope and
time symmetry of the trapezoidal waveform.
Check minimum and maximum amplitudes of positive
and negative pulse waveforms, both rectangular and
trapezoidal. Amplitudes should be approximately
5 volts above or below the 0 volt level.
Switch the FREQ (Hz) range control to check range-
to-range tracking accuracy. The oscilloscope should
show approximately the FREQ (Hz) range value.
Select the square waveform and rotate the SYM-
METRY switch to 71 and the VARIABLE control
full cw. Waveform asymmetry should be approxi-
mately 19:1. Rotate the VARIABLE control full ccw;
the waveform should be symmetrical. Verify that the
other switch position and VARIABLE control give
approximately 1:19 waveform asymmetry.
Turn the SYMMETRY switch to OFF and select DC
(lle
1193
T:
18.
19:
on the WAVEFORM selector. Use a shielded cable
with BNC connectors to connect SYNC OUT to the
oscilloscope trigger input.
Set the DC OFFSET switch to + and rotate the
VARIABLE control full cw. The amplitude should
be approximately +5 V into a 50Q load.
Set the DC OFFSET switch to —. Amplitude should
be approximately —5 V.
Rotate the OUTPUT ATTEN (dB) switch thru each
position. Verify the attenuation on the oscilloscope.
(The VARIABLE control is inoperative for DC.)
Repeat using 5082 OUT (LO) connector.
Turn the DC OFFSET switch to OFF and connect .
the SWEEP OUT to the oscilloscope without a load.
Set SWEEP MODE switch to RAMP UP. With the
SWEEP/STEP TIME switch set to 10 ms | 1 ms and
the VARIABLE control set full cw (1 ms sweep),
verify that the SWEEP OUT waveform is approxi-
mately a 1 kHz sawtooth. (RAMP DOWN position
gives the same positive going sawtooth waveform.)
NOTE
The SWEEP/STEP TIME VARIABLE control
is not calibrated.
Set the VARIABLE control full ccw. The SWEEP
OUT waveform should be approximately 100 Hz.
Check the SWEEP OUT frequency in all positions of
the SWEEP TIME switch and at both the cw and ccw
ends of the VARIABLE control.
Change SWEEP MODE switch to observe stair steps
up. (Both STEP UP and STEP DOWN give the same
positive going waveform.) Notice that the SWEEP/
STEP TIME setting is the duration of each step.
Set the WAVEFORM selector to /\, , the SWEEP
MODE switch to STEP UP, the SWEEP/STEP TIME
switch to 10 s I 1 s, and the VARIABLE control to
full cw (1 s sweep). Use a shielded cable equipped
with BNC connectors and connect SWEEP OUT to
VCG IN. Connect the oscilloscope to 5082 OUT (HI)
and observe the stepping of the output frequency.
Remove the cable from VCG IN and connect TRIG IN
to SWEEP OUT. Set SWEEP MODE to RAMP UP.
Set the GEN MODE switch to TRIG and the SWEEP/
STEP TIME switch to 100 ms | 10 ms. Rotate the
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