Performance Verification and Adjustments
1
Keysight 8990B Service Guide
35
Figure 1-7
Timebase frequency accuracy verification setup
5
Enable the path that routes the time base signal to the trigger output
connector with the following command.
SERV:BIST:TBAS:STAT ON
6
Measure the frequency of the signal at the trigger output connector using the
53132A.
Impedance verification
The impedance verification checks the input impedance of the vertical inputs. A
four-wire measurement is used to accurately measure the 50
Ω
and 1 M
Ω
inputs.
Required test equipment:
– 1 unit of 34410A digital multimeter
– 2 units of 10503A BNC cable
– 1 unit of BNC tee adapter (1250-0781)
– 2 units of BNC to dual banana adapter (1251-2277)
8990B
Symmetricom 58503B
53132A
PC
Trigger
output
NOTE
No adjustment is available for this test if it fails. Refer to
Содержание 8990B
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