Tektronix RSA3408, Service Manual

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Troubleshooting
5- 80
RSA3408B Analyzer Service Manual
Required Adjustments After Replacing Modules
When you change the following parts or modules, readjustment and/or recalibra-
tion is necessary. For details, refer to Adjustment Procedures .
RF3 Module
H
You must change the gain and offset values of YTO Tune DAC in the
DEBUG menu. You can find the gain and offset values in a label located on
the RF3 module.
H
You must calibrate IF flatness, RF gain and flatness for RF1, 2, and 3 bands.
RF2 and RF5 Modules
H
You must calibrate IF flatness, RF gain and flatness for RF1, 2, and 3 bands.
A10 A/D Board
H
You must calibrate baseband gain and baseband flatness.
H
You must calibrate IF flatness and RF gain for RF1, 2, and 3 bands.
H
You must calibrate IQ gain.
Step Attenuator
H
You must calibrate baseband gain and flatness.
H
You must calibrate RF gain and RF flatness for RF1, 2, and 3 bands.
Bandpass Filter (YTF)
H
You must change the gain and offset values of YTF Tune DAC in the
DEBUG menu. You can find the gain and offset values in a label located on
the YTF module.
H
You must calibrate IF flatness, RF gain and flatness for RF2 and 3 bands.
A100 Cal Generator Board
H
You must calibrate baseband gain and RF gain for RF1 band.
Hard Disk Drive
H
Full calibration is necessary because the calibration factors are lost.