Wavetek 75 - Inner-Range Switching; Trigger and Hold Logic Troubleshooting

Table 6-6. Frequency Ranging
NOTE: (1 = high, 0 = low)
Table 6-7. Inner-range Switching
Sample
Frequency Range
2
MHz - 200 kHz
199.98 kHz - 20 kHz
19.998 kHz - 2 kHz
1.9998 kHz - 200 HZ
199.98 HZ - 20 HZ
19.998 HZ - 2 HZ
1.9998 HZ - 200 HZ
199.98 HZ - 20 HZ
Table 6-8. Trigger and Hold Logic Troubleshooting
FRBlTl
U29-9
1
1
1
1
0
0
0
0
Display Counts
19998
- 16000
15998
- 8000
7998
- 4000
3998
- 2000
2.000
MHz
Scans by ArtekMedia O 2006
FRBlT2
U29-10
1
1
0
0
1
1
0
0
SW1
U36-13
1
1
0
0
1
Fault
Sync In (external) not
functional.
Hold In (ext) or hold key
not functional.
FRBIT3
U29-11
1
0
1
0
1
0
1
0
SW2
U36-14
1
0
1
0
1
Setup
Reset.
Apply
1 kHz TTL signal
to Sync In connector.
Reset.
Press Hold key.
Release Hold key. Apply
TTL low to Hold In
connector.
VCO
Frequency
U31-8
9.999
MHz -
8.000 MHz
7.999 MHz -
4.000 MHz
7.998 MHz -
4.000 MHz
7.996 MHz -
4.000 MHz
10.000 MHz
Check
U21
A-3
U27B-6
U27B-6
U27B-6
Results Desired
Inverted version of input signal.
A TTL high.
A TTL low.
A TTL low.