Power Not Within Specifications; Phase Lock Error Message Displayed - Agilent Technologies 8719ET Service Manual

Source Troubleshooting
Start Troubleshooting Here
For ES Models:
Disconnect the front panel R CHANNEL jumper.
NOTE For ES Option 089 analyzers, press the following:
System
Connect the power meter to R CHANNEL OUT and measure the power out.
• If the power level is at least −35 dBm, proceed to
Displayed" on page
• If the power level is lower, proceed
page 7-6.

Power Not within Specifications

Perform these power adjustments from
Constants":
1. "Output Power Adjustments" on page 3-17
2. "Power Linearity Adjustment" on page 3-24
3. "Blanking Adjustment (Test 54)" on page 3-30
• If power holes exist, use the block diagram (located at the end of
Troubleshooting Here") and the location diagrams (in
to check the cables and connections in the RF path.
• If power levels are not ±2 dB of the setting (8719ET/ES and 8720ET/ES) or ±3 dB of
setting (8722ET/ES) in only one or two bands, go to
page 7-22.
• If power levels are incorrect in all bands, go to
page 7-26.

Phase Lock Error Message Displayed

1. To view the 0.25V/GHz signal to the YIG oscillator, press the following:
Preset PRESET: FACTORY
SERVICE MENU
System
ANALOG IN Aux Input
Meas
AUTO SCALE
Scale Ref
Notice that for each band, the waveform should start and stop exactly as shown in
Figure 7-1, with only one ramp in each band. A problem in one band should not affect
the appearance of the waveform in other bands.
7-6
INSTR. MODE EXT R CHAN
7-6.
Chapter 3 , "Adjustments and Correction
Preset
ANALOG BUS ON
9 x1
"Phase Lock Error Message
to"Power Not within Specifications" on
Chapter 13 , "Replaceable
"Band-Related Problems" on
"Broadband Power Problems" on
8719ET/20ET/22ET
8719ES/20ES/22ES
RF Network Analyzers
Chapter 4 , "Start
Parts")
Service Guide