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4-54 Keysight N5247B Service Guide
Troubleshooting
Measurement System Troubleshooting
4-
5.
If the measured signal is present, continue testing at
Multiplexer Board” on page 4-55
6.
If the measured signal is missing on the R1 receiver, continue testing at
“Checking the A37 Reference Mixer Switch” on page 4-54
.
If the measured signal is missing on any receiver (other than the R1
receiver noted above) and the analyzer does not have receiver attenuators,
replace the A27 or A28 mixer brick, whichever is appropriate. Refer to
“Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-41
.
If the measured signal is missing on the A, B, C, or D receivers and the
analyzer has receiver attenuators, continue testing at
A47, A48, and A49 35-dB Receiver Step Attenuators” on page 4-54
Checking the A37 Reference Mixer Switch
1.
Remove the front panel REF 1 jumper and connect a spectrum analyzer to
the front-panel REF 1 SOURCE OUT connector.
2.
If the measured signal is present, replace the A27 mixer brick. Refer to
“Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-41
.
3.
If the measured signal is not present, replace the A37 reference mixer
switch. Refer to
“Removing and Replacing the A37 Reference Mixer
Checking the A46, A47, A48, and A49 35-dB Receiver Step Attenuators
1.
Locate the appropriate semirigid cable at the output of the receiver step
attenuator to be checked:
—
Options 219, 224, 419, and 423
—
Port 1; W98 of A46
—
Port 2; W104 of A49
—
Port 3; W100 of A47
—
Port 4; W102 of A48
2.
Disconnect the appropriate semirigid cable from the output of the step
attenuator.
3.
Connect the spectrum analyzer to the open step attenuator connector. Set
the spectrum analyzer to measure a signal at 800 MHz.
4.
If the 800 MHz signal is not present, replace the receiver step attenuator.
Refer to
“Removing and Replacing the A38–A41 Source Attenuators and
the A46–A49 Receiver Attenuators” on page 7-51
5.
If the 800 MHz signal is present, replace the associated mixer brick, A27 or
A28. Refer to
“Removing and Replacing the A27 and A28 Mixer Bricks” on
.
Summary of Contents for N5247B
Page 10: ...10 Keysight N5247B Service Guide Contents ...
Page 96: ...3 66 Keysight N5247B Service Guide Tests and Adjustments Adjustments 3 ...
Page 157: ...Keysight N5247B Service Guide 4 61 Troubleshooting This page left intentionally blank ...
Page 268: ...6 30 Keysight N5247B Service Guide Replaceable Parts Replaceable Parts Listings 6 ...
Page 270: ...6 32 Keysight N5247B Service Guide Replaceable Parts Replaceable Parts Listings 6 ...
Page 373: ...Keysight N5247B Service Guide 6 135 Replaceable Parts Replaceable Parts Listings ...
Page 426: ...6 188 Keysight N5247B Service Guide Replaceable Parts Replaceable Parts Listings 6 ...
Page 565: ...Installation Note Xxxxx xxxxx 3 ...