Resolution Bandwidth Accuracy - Anritsu S412E Maintenance Manual

Chapter 3 — Spectrum Analyzer Verification
3-7

Resolution Bandwidth Accuracy

The following test is used to verify the resolution bandwidth accuracy of the spectrum analyzer in the S412E.
Equipment Required
• Synthesized Signal Generator, Anritsu Model MS3692X
• K(m) to N(f) Adapter, Anritsu Model 34RKNF50
• 10 MHz Reference Standard
• RF Coaxial Cable, Anritsu Model 15NN50-1.5C
• BNC(m) to BNC(m) Coaxial Cable (Qty 2), Anritsu part number 2000-1627-R
• BNC Tee Adapter, BNC(m) to BNC(f)/BNC(f), Anritsu part number 3-2600-2
Procedure
1. Connect the BNC Tee Adapter to the output of the 10 MHz Reference Standard.
2. Connect a BNC Coaxial Cable between the BNC Tee Adapter and the 10 MHz Ref In connector of the
Anritsu MG3692x Synthesized Signal Generator.
3. Connect a BNC Cable between the BNC Tee Adapter and the External Ref In connector of the S412E.
4. Turn On both the 10 MHz Reference Standard and the Synthesized Signal Generator.
5. Set the MG3692x RF output frequency to 1 GHz CW and level to –30 dBm.
6. Install the 34RKNF50 Adapter to the output of the MG3692x Generator and then connect the
15NN50-1.5C RF Coaxial Cable between the Adapter and the RF In connector of the S412E.
7. Press the On/Off key to turn on the S412E.
8. Press the Shift key and then the Mode (9) key. Use the rotary knob to highlight Spectrum Analyzer and
then press the Enter key to switch to Spectrum Analyzer mode.
9. Preset the S412E by pressing the Shift key, then the Preset (1) key, then the Preset button on the
touchscreen.
Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
10. Touch the Amplitude main menu button and set the Reference Level to –10 dBm.
11. Touch the Atten Lvl submenu button and set to 0 dB.
12. Set the Scale to 10 dB/div.
13. Touch the Freq main menu button and set the Center Freq to 1 GHz.
14. Touch the Span submenu button and set to the first Span value listed in
Resolution Bandwidth Accuracy" on page
15. Touch the BW main menu button and set the RBW to the first RBW value listed in
16. Set the VBW to the first VBW value listed in
17. Press the Shift key and then the Measure (4) key.
18. Touch the OCC BW submenu button and then dBc submenu button.
19. Use the numeric keypad to enter 3 and then press the Enter key.
20. Touch the OCC BW On/Off submenu button to turn occupied bandwidth measurement on.
21. Record the OCC BW reading into the Measured Value column in
22. Verify that the OCC BW reading frequency is within ± 10% of the RBW.
23. Repeat Step 14 through
S412E MM
A-6.
Table
Step 22 for other settings and record the results into
PN: 10580-00324 Rev. N
3-7 Resolution Bandwidth Accuracy
Table A-10, "Spectrum Analyzer
A-10.
Table A-10.
Table A-10.
Table A-10.
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