Inner-Range Switching; Trigger And Hold Logic Troubleshooting - Wavetek 75 Instruction Manual

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.