Keysight Technologies X Series Service Manual page 208

RF Assembly
A3 RF Assembly Troubleshooting
9. Since A3 J2002 is before the output attenuator on the A7 Micro-Deck
10.The power level of the signal at A3 J2002 should be equal to the ALC Level
11.Verify the power supply voltages by seeing the
12.Verify that the instrument is using the factory calibration data by restoring
13.Run the
14.If the failure persists, replace the A3 RF assembly.
Unlevel
If there are any ALC issues, see
"Troubleshooting"
Amplitude Modulation
If there are any amplitude modulation issues, see
Issues (Option UNT)"
Pulse Modulation
If there are any pulse modulation issues, see
UNW)"
Self Tests
There is a series of Self Tests related directly to the RF Output section. They are
the 400 series tests. See
tests. If there are Self Test failures, see
proceed with determining a resolution for the failure.
208
— Span = 10 MHz
— Reference Level = +10 dBm
assembly the output level at A3 J2002 should be equal to the ALC Level.
To find the ALC Level press AMPTD, Atten/ALC Control, Atten Hold On and
read the Set ALC Level listed on the fourth softkey.
displayed, +/-3dB.
— If the power level measured is not equal to the ALC Level, +/-3 dBm,
the problems is with the A3 RF assembly. Proceed to step 11.
— If the power level measured is equal to the ALC Level, +/-3 dB, the
power level at the output of the RF Output section is correct. The
issue is somewhere farther down the signal path on the A7
Micro-Deck assembly. See
further troubleshooting.
Quick-Check" section in
the data. See "Calibration Data Restore"
Information and Calibration Data"
"RF Output Related Adjustments"
in Chapter 6, "Troubleshooting"
in Chapter 6, "Troubleshooting"
Chapter 4, "Self Test,"
Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
Chapter 11, "Micro-Deck Assembly,"
Chapter 8, "Power Supply"
in Chapter 3, "Instrument
listed later in this section.
"Unleveled Issues"
"Amplitude Modulation
"Pulse Modulation Issues (Option
for a description of each of the
Table 4-1 for instructions on how to
"Power Supply Status
in Chapter 6,
for