Publication No. 980935 Rev. A
3152B User Manual
Calibrations are marked with numbers from 1 to 49, and, except for
the (50M) and TCXO adjustments in the OSC (oscillators) group,
should be carried out exactly in the order as numbered on the panel.
The numbers that are associated with each adjustment are identified
by a Setup Number at the title of each of the adjustments in the
following procedure.
Adjustment values have the range of 1 through 256 with the center
alignment set to 128. Therefore, if you are not sure of the direction, set
the adjustment to 128 and add or subtract from this value. If you have
reached 1 or 256 and were not able to calibrate the range, there is
either a problem with the way you measure the parameter or possibly
there is a problem with the instrument. In either case, do not leave any
adjustment in its extreme setting but center the adjustment and
contact your nearest service center for clarifications and support.
Note that in the following procedures, although configuration of the
3152B is done automatically, some of the configurations are shown for
reference only. There is no requirement to change the configuration of
the 3152B during the remote adjustment procedure except in places
where specifically noted.
VCO Adjustments
The VCO controls the accuracy and linearity of the sample clock
generator. Correct operation of the VCO circuit ensures the accuracy
of the frequency path. Use this procedure if you suspect that there is a
frequency linearity and/or accuracy issue. The VCO Adjustment is not
required for field calibration.
(Setup 1)
160 MHz SCLK
Equipment: DMM
Preparation:
1. Configure the DMM as follows:
Function:
DCV
Range:
1
V
2. Configure the 3152B as follows:
SCLK:
160
MHz
3. Connect the DMM probes between R107 and ground
Adjustment:
1. Adjust CAL:SETUP 50 for a DMM reading of 0 V,
±
100 mV
(Setup 2)
180 MHz SCLK
Equipment: DMM
Preparation:
1. Configure the DMM as follows:
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Adjustments and Firmware Update 7-5
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