5-7 NXDN Modulation Fidelity Verification, Option 531 and 532 Chapter 5 — Option Verification
5-18 PN: 10580-00324 Rev. N S412E MM
5-7 NXDN Modulation Fidelity Verification, Option 531 and 532
The following test is used to verify the modulation fidelity of the signal generator on the S412E. This test
requires NXDN to be installed:
Equipment Required
• RF coaxial cable, Anritsu Model 15NN50-1.5C
• AC Power Adapter, Anritsu part number 40-187-R
Procedure
1. Connect the AC Power Adapter (Anritsu part number 40-187-R) to the S412E and then plug the power
cord of the AC Power Adapter to an AC outlet.
2. Power on the S412E and put the instrument into NXDN Analyzer mode with the Menu button.
3. Preset the S412E by pressing the Shift key, then the Preset (1) key, then the Preset button on the
touchscreen.
4. Connect the RF cable between the Signal Generator Out and RF In connectors of the LMR Master.
5. Press the Setup main menu button and set Rx Pattern to 1031 Hz:
6. Set the Tx Pattern to nxdn_1031_9600.
7. Press the Amplitude main menu button and set Tx Output Lvl to 0dBm.
8. Press the Frequency main menu button and set Rx/Tx Coupling to On.
9. In the lower-right hand corner of the touchscreen, press the Turn Sig-Gen ON button to turn the signal
generator on. The button will now appear as Turn Sig-Gen OFF to allow the signal generator to be
turned off when the procedure is completed.
10. Press the Frequency main menu button and set Rx Frequency to 5.5 MHz.
11. Record the Mod Fid value in Table A-29, “Options 531 and 532, Signal Generator Modulation Fidelity
Verification for NXDN” on page A-20, and verify the value is within specification.
12. Repeat Step 10 through Step 11 for the other Frequencies listed in Table A-29.
13. Press the Setup main menu button and set Rx Pattern to O.153 (V.52) and Tx Pattern
to nxdn_511(O.153)_9600.
14. Repeat Step 10 through Step 11 for the other Frequencies listed in Table A-29.
15. When finished, press the Turn Sig-Gen OFF button to turn off the signal generator.
Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
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