Spectrum Analyzer Verification 2-7 Residual Spurious Response Verification
MT8212E and MT8213E MM PN: 10580-00255 Rev. J 2-17
2-7 Residual Spurious Response Verification
The following two tests are used to verify the residual spurious response of the Spectrum Analyzer of the
MT821xE Cell Master. They are performed using the positive peak detection mode. The two parts to this test
are the “Residual Spurious Response Test with Preamp Off” immediately below, and the “Residual Spurious
Response Test with Preamp On” on page 2-18.
Residual Spurious Response Test with Preamp Off
Equipment Required
• Anritsu 28N50-2 50 ohm Termination
Procedure
1. Connect the 50 ohm Termination to the MT821xE Spectrum Analyzer RF In connector.
2. Press the On/Off key to turn On the MT821xE Cell Master.
3. On the MT821xE:
a. Press the Shift key and then the Mode (9) key.
b. 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 submenu key to reset the instrument to the
default starting conditions.
5. Press the Shift key, then the Sweep (3) key, then the Sweep Mode key, and then press the Performance
submenu key.
6. Press the Amplitude main menu, then press the Reference Level submenu key.
7. Use the keypad to enter –40 and press the dBm submenu key.
8. Press the Atten Lvl submenu key and enter 0, then press the dB submenu key.
9. Make sure that the Pre Amp On/Off submenu key is in the Off position.
• If the preamp is On, press the Pre Amp On/Off submenu key to turn it Off.
10. Press the Amplitude soft key, then press the Detection submenu key, and then press the Peak soft key.
11. Press the Freq main menu key and press the Start Freq submenu key.
12. Use the keypad to enter 10 and press the
MHz submenu key.
13. Press the Stop Freq submenu key, enter 50, and press the MHz submenu key.
14. Press the BW submenu key and press the RBW submenu key.
15. Use the keypad to enter 1 and press the kHz submenu key.
16. Press the VBW submenu key, use the keypad to enter 300, and then press the Hz submenu key.
17. Wait until one sweep is completed.
18. Press the Marker main menu and press the Peak Search submenu key.
19. Verify that the Marker 1 amplitude reading is less than –90 dBm.
Note
If a spur larger than –90 dBm appears, then wait another full sweep and observe whether the spur
re-appears 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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