Agilent Technologies 8719ET Service Manual page 99

8719ET/20ET/22ET
8719ES/20ES/22ES
RF Network Analyzers
For 8722ET/ES Models:
Press
Stop 20
Press and enter the power level that is listed as "P2" in
Power
Press
x1 Cal
14.Press and enter the power level that is listed as "P2" in
Power
then press .
x1
15.Press
Scale Ref
and then press
x1
The displayed trace should be centered on the reference (±0.5 dB).
• If the trace is not centered on the reference, continue with the next step.
• If the trace is centered on the reference, go to
16.To switch on the power DAC, press the following:
SERVICE MENU
System
SRC ADJUST MENU
17.Adjust the front panel knob until the mean value is P1. Record the "MAIN POWER
DAC" number.
18.To switch off the power DAC, press
19.Press
Save/Recall
20.Divide the previously recorded DAC number by 256.
21.To store the quotient, press the following:
SERVICE MENU
System
PEEK/POKE ADDRESS
Enter the quotient and then press
22.To store the remainder, press the following:
PEEK/POKE ADDRESS
Enter the remainder and then press
23.Press .
Preset
24.Press
Save/Recall
Service Guide
.
G/n
CALIBRATE MENU
REFERENCE VALUE
.
SERVICE MODES
PWR DAC ON
PWR DAC OFF
.
SAVE STATE
PEEK/POKE
1619001446
x1
1619001447
x1
and verify the mean value is equal to "P1."
RECALL STATE
Adjustments and Correction Constants
RECEIVER CAL TAKE RCVR CAL SWEEP
and enter the value listed as "P2" in
"Low Band Adjustment" on page
2580 x1
.
x1 POKE
.
POKE
x1
.
Power Linearity Adjustment
Table 3-4.
Table 3-4,
Table 3-4
3-28.
3- 27
.