Agilent Technologies 54502A Servisní příručka stáhnout pdf (Strana 77)

System Board

Assembly

Threshold

Adjustment

1. Disconnect power cord from HP 1650B/51B.

2. Connect negative (-) lead of voltmeter to TP GND. Refer to figure 4-3 for

testpoint and adjustment locations.

3. Connect positive (+ ) lead of voltmeter to HP 1650B A1TP3, or HP 1651B

A1TP2 on the System Board Assembly.

4. Connect power cord to logic analyzer and turn instrument power to ON.

5. Assign HP 1650B POD 3, or HP 1651B POD 2, to a machine in the System

Configuration menu by using front-panel knob and SELECT key.

6. Set User defined Pod Threshold of the pod assigned in the previous step to

-9.9 V in the Format Specification menu by using the following steps if

unfamiliar with the menus.

Figure 4-3. System Board Testpoints and Adjustments

HP 1650B/1651B Adjustments

Service Manual 4-7

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Agilent Technologies 54502A Servisní příručka Strana 77