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Performance Tests
CSA 803A Service Manual
4Ć23
This procedure verifies the correct operation and accuracy of the
CSA 803A's horizontal reference clock (see Figure 4Ć2).
This procedure should only be performed if maintenance is required.
This procedure is not necessary for verifying instrument specificaĆ
tions.
Specifications
The operational frequency specification for the horizontal reference clock is
200,000 kHz ±5 kHz.
Setup to Check Horizontal Reference Clock
CSA 803A
10X Probe
To Pin 9
of U191
A5 Time Base/
Controller Board
(See Figure 4Ć2)
To Pin 1
of U191
Frequency
Counter
Procedure to Check Horizontal Reference Clock
ăStep 1:ăInitialize the CSA 803A settings as follows:
UTILITY button press...........................................
Initialize (in major menu) touch..............................
Initialize (in verification popĆup menu) touch..................
ăStep 2:ăPerform the following operations on the CSA 803A in the order
listed:
H Set the front panel ON/STANDBY switch to STANDBY.
H Set the CSA 803A on its right side (as viewed from facing the front of
the CSA 803A).
H Set the CSA 803A front panel ON/STANDBY switch to ON.
Horizontal
Reference Clock