Spectrum Analyzer Verification 2-6 Residual Spurious Response Verification
S3xxE MM PN: 10580-00253 Rev. J 2-15
Residual Spurious Response Test with Preamp On
Equipment Required
• Anritsu 28N50-2 50 ohm Termination
Procedure
1. Connect the 50 ohm Termination to the S332E or S362E Spectrum Analyzer RF In connector.
2. Press the On/Off key to turn on the S332E or S362E Site Master.
3. On the S332E or S362E, press the Shift key and then the Mode (9) key. Rotate the knob to highlight
Spectrum Analyzer and then press the Enter key to switch to Spectrum Analyzer mode.
4. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default
starting conditions.
5. Press the Shift key, the Sweep (3) key, then the Sweep Mode soft key, and press the Performance soft key.
6. Press the Amplitude soft key, then press the Reference Level soft key.
7. Use the keypad to enter –50 and press the dBm soft key.
8. Press the Atten Lvl soft key and enter 0, then press the dB soft key.
9. Ensure that the Pre Amp On/Off soft key is in the On position. If the preamp is off, press the Pre Amp
On/Off soft key to turn it On.
10. Press the Amplitude soft key, then press the Detection soft key and then the Peak soft key.
11. Press the BW soft key and press the RBW soft key.
12. Use the keypad to enter 10 and press the kHz soft key.
13. Press the VBW soft key and use the keypad to enter 1, then press the kHz soft key.
14. Press the Freq soft key and press the Start Freq soft key.
15. Use the keypad to enter 10 and press the MHz soft key.
16. Press the Stop Freq soft key, enter 1 and press the GHz soft key.
17. Wait until one sweep is completed.
18. Press the Marker soft key and press the Peak Search soft key.
19. Record the “Marker 1 amplitude” reading in the test records and verify that it is less than –90 dBm.
Use Table A-10, “Spectrum Analyzer Residual Spurious with Preamp On”.
20. Repeat Step 14 through Step 19 for the other Start and Stop frequencies as applicable for the unit under
test and record in Table A-10.
Note Before continuing, allow a 30 minute warm up period for the internal circuitry to stabilize.
Note
If a spur larger than –90 dBm appears, wait another full sweep and observe whether the spur
reappears at the same point on the second sweep.
If the spur does not appear at the same point on the second sweep, then the spur on the first sweep
was not real.
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