Agilent Technologies 89410A Service Manual page 74

Troubleshooting the Analyzer
To troubleshoot intermittent failures
5
Check the calibration correction curves.
a
Press the following keys:
]
[
Preset
[ ]
System Utility
[ ]
auto cal off
]
[ more cal setup
[
auto zero cal off]
[
Measurement Data
[ ]
freq response
]
[
Ref Lvl/Scale
[ ]
Y ref level
0
[ ]
dB
[ ]
Y per div
0.5
[ ]
dB
[ rng tracking off]
]
[
ref position
50
[ ]
%
[
]
ref line on
Since there is no input, the display will show lines across the
screen.
b Press the following keys for each of the primary calibration
ranges:
The primary calibration ranges are -14, −12, −10, −8, −6, and 0
dBm.
]
[
Range
[ ]
ch1 range
primary calibration range
]
[
dBm
]
[
System Utility
[ ]
more cal setup
[
save ch1 cal trace
[ ]
into D1
[
Measurement Data
[ ]
data reg
[ ]
D1
The following is a typical calibration correction curve display:
1-56
]
]
]