Wavetek 182A, Инструкция по эксплуатации

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Table
6·4.
Sine Conversion
Indication: Sine waveform problem.
Check
1. Set controls to initial positions (refer to paragraph 6.4).
2. Check emitter 01 for a 4 kHz,
± 1.25V triangle.
3. Verify that the
±
1 .25V triangle peaks at the emitter of 01 agree within 3%.
4. Select triangle function; check for ± 1 .25V triangle at U 13 pin 10.
5. Select sine function; check for ± 1.25V sine at U13 pin 10.
6. Check sine distortion 500 OUT (HI) per calibration procedure (refer to
table 5.1).
7. Check sine amplitude vs frequency per specifications (refer to section 1).
Table
6·5.
Square Function
Indication: Square waveform problem.
If
Faulty,
Check
Check for normal operation.
Go to table 6-2.
a. R62, R63, R64, R65,
R67, R6S, R69 R70
b. CR7, CRS, U7.
c.
±
15V supplies.
Go to table 6-3, step 3.
a. U12 circuitry.
b. SW12.
a. R97, R114 adjustments.
b. Waveform symmetry, R45
adjustment and table 6-S.
c. U12 circuitry.
C47, C55, C56, C57
Check
If Faulty, Check
1. Set controls to initial positions (refer to paragraph 6.4). Check for normal operation.
2. Check CR1 0 cathode for a 4 kHz, approximately ± 2V square wave. Go to table 6-2.
3. Select a triangle function; check U13 pin 10 for a ± 1.25V triangle. Go to table 6-3.
4. Select square function; check U13 pin 10 for a
±
1.25V square. a. 012, 013 circuitry.
b. SW14.
5. Check square wave at 500 OUT (HI) for the same 20V p-p (open circuit) R106, R110, R111.
amplitude as the triangle and sine.
6. Check riselfall times of 4 MHz square (500 terminated) for < 50 ns. C51, C55, C56, C57.
Table
6·6.
TTL Sync Output
Indication: TTL sync output problem.
Check
If
Faulty, Check
1. Set controls to initial positions (refer to paragraph 6.4). Check for normal operation.
2. Check U8 pin 1 for a TIL level, 4 kHz square.
Go to table 6-2.
3. Check US pin S for a TIL level, 4 kHz square. a. US.
b. CR11, CR12.
4. Check SYNC OUT TIL. E27, E2S, E19 wiring.
5. Check SYNC OUT waveform at 4 MHz, using a TIL load termination or a a. US.
6-4
2:
6000 resistive termination and
:5
3 foot RG5SU coax. b. E19 ground connection.