Agilent Technologies 89410A Service Manual page 91

To keep the sine wave displayed, adjust the oscilloscope's trigger
level while varying the trigger offset value.
d If the trigger offset function is incorrect, the A10 Analog Input
assembly is probably faulty.
e
Reconnect A10 J3 to A36 J5.
f
Disconnect the synthesizer from CHANNEL 1.
4 Check the analog source to input path.
a Press the following keys:
]
[Preset
[ ]
Source
[
source on]
]
[level
0
[ dBm ]
[ System Utility ]
[
auto cal off]
]
[more cal setup
[
auto zero cal off]
]
[Return
[ more ]
[ diagnostics ]
[
service functions
[
special test modes
[ ]
input
[ source ]
b
Connect the oscilloscope to A10 J2 using the BNC(m)-to-SMB(f)
cable.
c The oscilloscope should display a 130 ±13 mVp-p sine wave.
d
If the signal is correct, go to Step 5.
e
Place the analyzer on the side closest to the display.
f Remove the bottom cover.
g
Set the oscilloscope as follows:
CH1 V/div
Input Impedance
CH1 Coupling
]
]
100 mV/div
Ω
1 M
dc
Troubleshooting the Analyzer
To troubleshoot input and ADC failures
1-73