Agilent Technologies 35670A Service Manual page 240

Troubleshooting the Analyzer
To troubleshoot trigger failures
Step 2. Determine the probable faulty assembly or next step by comparing the trigger
G
failure to the following table.
If the trigger failure matches more than one entry in the table, use the entry closest to
the beginning of the table.
Trigger Mode Failing
All channels and external trigger fail all trigger modes
All channels trigger but external trigger fails all trigger modes
At least one channel or external trigger functions correctly
Channel level fails
Arm fails
External trigger fails user level or TTL level
External trigger fails EXT RANGE
Trigger delay fails
Step 3. Check trigger signal to Digital assembly.
G
• Set the power switch to off (
• Remove the A5 Analog assembly and attach a test clip patch cord to TP 204.
• Connect a logic probe to the patch cord and TP 160 (ground).
• Reinstall the Analog assembly in the card nest with patch cord and probe
attached.
• Set the power switch to on (
• Press the following keys:
[
System Utility
[
CALIBRATN
[
AUTO CAL
[ ]
Input
[
ALL CHANNELS
[
CH* FIXED RANGE
1
[ ]
Vpk
[ ]
Source
[
SOURCE ON
[ ]
LEVEL
[ ]
1
[ ]
Vpk
[
System Utility
[ ]
MORE
[
SERVICE TESTS
[
SPCL TEST MODES
[
SOURCE LEVEL
[ ]
Trigger
[
CHANNEL 1
4-64
).
O
).
l
]
]
OFF ]
]
]
]
]
]
]
]
]
Agilent 35670A
Probable Faulty
Assembly or Next Step
Step 3
Step 4
A5 Analog
A5 Analog
A10 Rear Panel
A6 Digital