Chapter 2 — Spectrum Analyzer Verification 2-9 Residual Spurious Response Verification
MS2720T MM PN: 10580-00342 Rev. D 2-21
Residual Spurious Response Test with Preamp On
Equipment Required for MS2720T with option 709, 713 or 720
• Anritsu 28N50-2 50 ohm Termination
Equipment Required for MS2720T with option 732 or 743
• Anritsu 28KF50 50 ohm Termination
Procedure
1. Connect the 50 ohm termination to the Spectrum Analyzer RF In connector.
2. Set the MS2720T to Spectrum Analyzer mode and then Preset the instrument. Press the Shift key, the
Sweep (3) key, Sweep Mode submenu key and then the Performance submenu key.
3. Press the Amplitude key, then press the Reference Level submenu key.
4. Use the keypad to enter –50 and press the dBm submenu key.
5. Press the Atten Lvl submenu key and enter 0, then press the dB submenu key.
6. Ensure that the Pre Amp On/Off submenu key is in the On position. If the preamp is Off, then press the
Pre Amp On/Off submenu key to turn it On.
7. Press the Shift key and then press the Sweep (3) key, then press Detection and then the Peak submenu
key.
8. Press the BW main menu key and press the RBW submenu key.
9. Use the keypad to enter 3, and press the kHz submenu key.
10. Press the VBW submenu key and use the keypad to enter 300, then press the Hz submenu key.
11. Press the Freq main menu key, and press the Start Freq submenu key.
12. Use the keypad to enter 1, and press the MHz submenu key.
13. Press the Stop Freq submenu key, enter 30, and press the MHz submenu key.
14. Wait until one sweep is completed.
15.
Press the Marker main menu key, and press the Peak Search submenu key.
16. Verify that the Marker 1 amplitude reading is ≤ –100 dBm and record it in Table A-59, “Spectrum
Analyzer Residual Spurious (Preamp On)” on page A-31.
17. Repeat Step 8 through Step 16 for the other Start and Stop frequencies with the RBW and VBW as listed
in Table A-59. Note to stop at the applicable frequency limit of the model under test as listed below:
• 9 GHz for MS2720T with option 709
• 13 GHz for MS2720T with option 713
• 20 GHz for MS2720T with option 720
• 32 GHz for MS2720T with option 732
• 43 GHz for MS2720T with option 743
Note
If a spur with an amplitude larger than –100 dBm occurs, wait another full sweep and observe
whether the spur occurs at the same point on the second sweep. If the spur does not occur at the
same point on the second sweep, then the spur on the first sweep was not real.
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