Keysight N5171B EXG Service Manual page 93

Troubleshooting
Troubleshooting No, Low, or Unleveled Output Power (N5173B/83B)
4. Let the signal generator sweep until the spectrum analyzer displays a
5. Using the marker feature on the spectrum analyzer, measure the lowest
6. Press AMPTD > ALC Off On to On.
7. Let the signal generator sweep until the spectrum analyzer displays a
8. Using the marker feature on the spectrum analyzer, measure the lowest
9. Compare the measured values from
Checking A3 RF Assembly Output Signals < 3.2 GHz (N5173B/83B)
1. Remove the external cover and the top inside cover. Refer to
2. Using
86
— Press Return > Return > Sweep > Freq Off On to On.
d. Press RF On/Off to On.
e. Press AMPTD > ALC Off On to Off.
f. Press AMPTD > <maximum settable power> > dBm.
sufficient number of points to provide a good representation of power
performance across the range of frequencies in the sweep.
power level displayed for sweep points between 100 kHz and 3.1999 GHz,
and record the lowest power reading.
sufficient number of points to provide a good representation of power
performance across the range of frequencies in the sweep.
power level displayed for the sweep points between 100 kHz and 3.1999
GHz, and record the lowest power reading.
listed for maximum output power in the N5173B or N5183B Data Sheets.
— If the measured power with ALC Off is less than the specified power
shown in the N5173B or N5183B Data Sheets go to
RF Assembly Output Signals < 3.2 GHz (N5173B/83B)" on page
— If the measured power with ALC Off is greater than or equal to the
specified power shown in the N5173B or N5183B Data Sheets, but
less than the specified power shown in the N5173B or N5183B Data
Sheets when the ALC is on, go to
GHz (N5173B/83B)" on page
"Assembly Replacement."
covers.
Figure 1-17, remove the W20 semi-rigid cable that is connected
between the A3 RF assembly output and the low band coupler input on
the A7 Micro Deck.
step 5 and step 8
"Checking ALC Operation < 3.2
96.
for instructions on removing the instrument
Keysight X-Series Signal Generators Service Guide
with the values
"Checking A3
86.
Chapter 3,