Track And Hold Offset Adjustments - HP 54501A Service Manual

4-14 . Track and Hold Offset Adjustments
Equipment Required:
100 MHz Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 54501 A
High Impedance 10:1 Divider Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10432A
Procedure :
1 .
Press CHAN key and set CHANNEL menu for the following parameters:
a.
Channels 1 and 4 on .
b.
Channels 2 and 3 off .
c .
Vertical sensitivity of channels 1 and 4 to 100 mV/div .
d .
Offset for trace at center screen .
2.
Connect oscilloscope probe to System Board Assembly TP1 (T/H 1,2) Refer to figure 4-4 for
location of testpoints .
3.
Adjust System Board Assembly R274 until the 10 MHz square wave of Channel 1 is at mini-
mum amplitude . Do not adjust 8274 to the end-range position .
4.
Connect oscilloscope probe to System Board Assembly TP2 (T/H 3,4) .
HP 54501A ADJUSTMENTS
5.
Adjust System Board Assembly R74 until the signal on Channel 4 is at minimum amplitude .