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Attenuator
The attenuator calibration is the only calibration that requires test
Calibration
equipment. If you are not using the recommended equipment listed on
the previous page, make sure the substitute equipment meets the
critical specifications listed in the HP 1652Bll653B Service Manual.
5. Select the Calibration choice field. When the pop-up appears,
select Attenuation.
6. Connect the test eauiDment as shown below. The voltmeter
monitors the voltage level to the oscilloscoDe.
/---INPUT
VOLTMETER
0
01652E14
POWER SUPPLY
I
1
LOGIC
ANALYZER
1
2
0
-7
Figure D-7. Attenuator Calibration
Equipment Setup
7. Select the Start field with the front-panel knob and SELECT key.
The calibration screen will prompt you to connect the appropriate
channel and set the DC voltage as specified.
8. Adjust the power supply to within 20.1% of the specified voltage.
If the measured voltage displayed on the voltmeter is greater than
20.1 % from the specified voltage in step 7, you will have to
compensate the oscilloscope as shown in step a below.
a. Select the Voltage field and enter the measured voltage value,
then select DONE
9. To proceed with the Attenuator calibration, select the Continue
field. Repeat steps 8 and 9 for each specified voltage value.
10. When the calibration is complete, the updated calibration status
screen will appear.
HP 16528/1653B
Installation,
Maintenance
and Calibration
Front-Panel Reference
D-13
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