150 Keysight Technologies N9040B UXA Signal Analyzer Service Guide
RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
Troubleshooting a Low Band Problem
Refer to the RF Lowband Path Block Diagram in
and follow the
instructions in the settings box. To enable the internal 50 MHz,
−
25 dBm
calibrator signal press
Input/Output
,
RF Calibrator
,
50 MHz
.
The Low Band signal path (sometimes referred to as Band 0) is used for all
signals less than 3.6 GHz when the analyzer is used in normal operation. If the
stop frequency is set to 3.6 GHz, the analyzer displays only the Low Band
signal path. If the analyzer stop frequency is set above 3.6 GHz and the start
frequency is set below 3.6 GHz, the analyzer will sweep up to 3.6 GHz in low
band and then automatically switch to the high band path above 3.6 GHz.
A11 Low Band Switch Verification
Disconnect W8 from A13A1J2. See
for location of connector. Attach
a right angle sma adapter to W8 and measure the output of the Low Band
Switch with a spectrum analyzer. Expected signal is 50 MHz at
−
35.3 dBm
since the Low Band Switch and Option LNP SW3 have a few tenths of a dB
loss.
If the signal level is incorrect, remove A10 Input Attenuator B output cable W51
and measure the output power. Expected signal is 50 MHz at
−
35 dBm. See
for location of attenuator. If the attenuator output signal is correct
but the Low Band output at W8 is incorrect, suspect the A11 Low Band Switch,
the interconnect cables, Switch 3 if Option LNP is present, or the control
signals. The control signals are explained in
Содержание N9040B Option 513
Страница 4: ...4 ...
Страница 138: ...138 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Instrument Messages Condition Messages ...
Страница 240: ...240 Chapter 11 Hardware Options A21 Wideband Analog IF Troubleshooting Figure 11 1 Analog IF Block Diagram ...
Страница 256: ...256 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Block Diagrams Block Diagrams Block Diagrams ...
Страница 306: ...306 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Replaceable Parts Figure 14 2 External Hardware ...
Страница 338: ...338 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Replaceable Parts Figure 14 28 Chassis ...
Страница 346: ...346 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Replaceable Parts ...
Страница 502: ...502 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Post Repair Procedures ...
Страница 532: ...532 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Functional Tests Scale Fidelity ...
Страница 536: ...536 Keysight Technologies N9040B UXA Signal Analyzer Service Guide Instrument Software Software Updates ...
Страница 541: ...Index Index 541 Y yellow LED 48 51 yig filter see A12 YTF YTF see A12 YTF ...