Agilent Technologies DSO80204B, Service Manual

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Chapter 6: Replacing Assemblies
To set the calibration factors after replacing the acquisition board
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To set the calibration factors after replacing the acquisition board
The following procedure must be performed after replacing the acquisition board. This procedure
only needs to be performed once after the acquisition board is replaced.
Equipment Required
1
Perform self tests
a Exit the oscilloscope application.
b
From a command prompt, run the oscilloscope software using the following syntax:
c:\scope\bin\agscope.exe -service
While the oscilloscope is warming up, run the self-test to ensure that the hardware is functioning
properly. To run the self-test:
c
Pull down the Utilities menu and select Self Test.
d Select Scope Self Test from the Self Test list.
e Click on Start Self Test to start the self test procedure.
If any of the self-tests fail, ensure that the failure is diagnosed and repaired before
calibrating and testing performance.
2
Performance calibration.
After the warm up period, calibrate the oscilloscope.
a Connect the RS-232 cable to the Digital Multimeter RS-232 port and to the RS-232 port
on the oscilloscope.
b Set Digital Multimeter as follows:
Interface: RS-232
Baud Rate: 9600 Baud
Let the oscilloscope warm up before testing
The oscilloscope under test must be warmed up (with the oscilloscope application running) for at least
30 minutes prior to the start of any performance test.
Description Critical Specifications Recommended
Model/
Part Numbers
Digital Multimeter No substitute Agilent 34401A
10 MHz Signal Source
(required for time
scale calibration) Frequency accuracy better than 0.4 ppm Agilent 53131A with
Opt. 010*
Cable Assembly No substitute Agilent 54855-61620
Cable Assembly RS-232 (f)(f) Agilent 34398A
Cable Assembly 50
Ω
characteristic impedance BNC (m) connectors ~ 36 inches
(91 cm) to 48 inches (122 cm) long
Agilent 8120-1840
Adapter BNC Barrel (f)(f) Agilent 1250-0080
Adapter BNC shorting cap Agilent 1250-0929
Adapter (Qty. 2) No substitute Agilent 54855-67604
Adapter BNC (f) to dual banana Agilent 1251-2277
* The 10 MHz Signal Source requires time base calibration once every 6 months. The source should be powered on
for at least 24 hours before use.