Agilent Technologies 8935 Series, Manual

Page: 89 / 343

88 Chapter 3
Troubleshooting
Service Screen
Latch
This field is used to manually select the circuit latches that control
switch, DAC, and gain settings within the Test Set. The value of the
selected latch is displayed and changed in the
Value
field. Some
settings are read-only.
To set a switch, DAC, or gain setting:
1. Use the knob to select the
Latch
field. A
Choices
menu will appear.
2. Move the cursor to the desired latch name and press the knob to
select it.
3. Use the knob to select the
Value
field. A flashing >> cursor is
displayed.
4. Rotate the cursor control knob to modify the value (hexadecimal).
NOTE
If any of the switches, DACs, or gain settings are changed with the
Latch
field, the Test Set will generate the message:
Direct latch
write occurred. Cycle power when done servicing.”
To clear this
message, cycle the Test Set’s power. Upon power-up, the internal
controller will return the Test Set to its default settings and values.