3-4 Service Guide
Adjustments and Correction Constants 8719ET/20ET/22ET
A7 Switch Positions 8719ES/20ES/22ES
RF Network Analyzers
A7 Switch Positions
The A7 switch allows you to set up your analyzer to alter correction constants (CCs).
NOTE Before moving the A7 switch, perform “EEPROM Backup Disk Procedure,” on
page 3-33 to save your correction constants.
Required Equipment and Tools
To move the switch position, use a non-metallic adjust tool, HP/Agilent part number
8830-0024.
1. Remove the power cord from the analyzer.
2. Set the analyzer on its side.
3. Remove the two corner standoffs from the bottom of the instrument with the T-10 TORX
screwdriver.
4. Loosen the captive screw on the bottom cover's back edge, with the T-15 TORX
screwdriver.
5. Slide the cover toward the rear of the instrument.
CAUTION Use proper ESD procedures when performing the following steps.
6. Move the A7 switch, as shown in Figure 3-1.
• Move the A7 Switch to the ALT position before you run any of the correction constant
adjustment routines. This is the position for altering the analyzer's correction
constants.
• Move the A7 Switch to the NRM position after you have run correction constant
adjustment routines. This is the position for normal operation.
7. Reconnect the power cord and switch on the instrument.