Tektronix CSA 803C Vertical Reference Voltage

Performance Tests
CSA 803C Service Manual 4Ć21
This procedure checks that the vertical reference voltages are at +5 V and
-5 V at J63C on the A26 M/F Acquisition Interconnect board (see FigĆ
ure 4Ć1).
This procedure should only be performed if maintenance is required.
This procedure is not necessary for verifying instrument specificaĆ
tions.
Specifications
The measured voltage must be within the limits of 5 V ±200 mVand-5V
±200 mV.
Setup to Check Vertical Reference Voltage
CSA 803C
ToGND
A26 M/F Acquisition
Interconnect Board
(see Figure 4Ć1)
DigitalVoltmeter
To±5 V
Hi
Low
Procedure to Check Vertical Reference Voltage
ăStep 1:ăInitialize the CSA 803C settings as follows:
UTILITYbutton press...........................................
Initialize (in major menu) touch..............................
Initialize (in verification popĆup menu) touch..................
ăStep 2:ăConnectthe Digital Voltmeterto the +5 V reference point and
GND on the A26 Mainframe (M/F) Acquisition Interconnect board. See
Figure 4Ć1.
ăStep 3:ăSet the Voltmeterfor DC Voltage, and check for a reading of
+5 V, ±200 mV.
ăStep 4:ăConnectthe Digital Voltmeterto the -5 V reference point and
GND on the A26 M/F Acquisition Interconnect board.
Vertical Reference
Voltage