Low Output Power Or No Output Power < 3.2 Ghz (N5173B/83B) - Keysight N5171B EXG Service Manual

Troubleshooting
Troubleshooting No, Low, or Unleveled Output Power (N5173B/83B)
8. Using the marker feature on the spectrum analyzer, measure the lowest
9. Compare the measured values from
Low Output Power or No Output Power < 3.2 GHz (N5173B/83B)
1. Connect the signal generator's RF output through a 10 dB attenuator to a
2. Set up the spectrum analyzer:
3. Set up the signal generator:
Keysight X-Series Signal Generators Service Guide
power level displayed for sweep points between 100 kHz and the
maximum signal generator frequency, and record the lowest power
reading.
listed for maximum output power in the N5173B or N5183B Data Sheets.
— If the measured power with the ALC off is less than the specified
power shown in the N5173B or N5183B Data Sheets, go to
Output Power or No Output Power < 3.2 GHz (N5173B/83B)" on
page 85 or "Low Output Power or No Output Power ≥ 3.2 GHz
(N5173B/83B)" on page
— If the measured power with the ALC off is greater than or equal to
the specified power shown in the N5173B or N5183B Data Sheets,
but is less than the specified power shown in the N5173B or
N5183B Data Sheets when the ALC is on, perform the following
steps:
a. Replace the A7 Micro Deck.
b. Go to Chapter 4, "Post-Repair Procedures and Operational
Performance
spectrum analyzer.
a. Press Preset.
b. Set the reference level to +25 dBm.
c. Set the start frequency to 50 kHz.
d. Set the stop frequency to 3.2 GHz.
e. Set Trace to Max Hold.
a. Press Preset.
b. Press SWEEP > Sweep Type List Step to Step.
c. Press Configure Step Sweep.
— Press Freq Start > 100 > kHz.
— Press Freq Stop > 3.1999 > GHz.
— Press # Points > 501 > Enter.
— Press More > Step Dwell > 2 > msec.
step 5 and step 8
92.
Verification.".
with the values
"Low
85