Agilent Technologies E8257C PSG Guía de usuario Pagina 175

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Chapter 6 161
Custom Arb Waveform Generator
Working with User–Defined Setups (Modes)-Custom Arb Only
11. Press Digital Mod Define > Store Custom Dig Mod State > Store To File.
If there is already a file name from the Catalog of DMOD Files occupying the active entry
area, press:
Edit Keys > Clear Text
12. Enter a file name (for example, NADCQPSK) using the alpha keys and the numeric keypad.
13. Press
Enter.
The user–defined single–carrier digital modulation state should now be stored in non–volatile
memory. The RF output amplitude, frequency, and operating state settings are not stored as part
of a user–defined digital modulation state file.
Customizing a Multicarrier Setup
In this procedure, you learn how to customize a predefined multicarrier digital modulation setup by
creating a custom 3–carrier EDGE digital modulation state.
1. Press
Preset.
2. Press
Mode > Custom > Arb Waveform Generator > Multicarrier Off On.
3. Press
Multicarrier Define > Initialize Table > Carrier Setup > EDGE > Done.
4. Highlight the Freq Offset value (500.000 kHz) for the carrier in row 2, and
press
Edit Item > 625 > kHz.
5. Highlight the Power value (0.00 dB) for the carrier in row 2, and press
Edit Item > 10 > dB.
You have a custom 2carrier EDGE waveform with a carrier at a frequency offset of 625 kHz
and a power level of 10.00 dBm.
6. Press
Return > Digital Modulation Off On.
This generates a waveform with the custom multicarrier EDGE state. The display changes to Dig
Mod Setup: Multicarrier (Modified). During waveform generation, the DIGMOD and I/Q
annunciators appear and the new custom multicarrier EDGE state is stored in volatile memory.
7. Set the RF output frequency to 890.01 MHz.
8. Set the output amplitude to10 dBm.
9. Press
RF On/Off.
The custom multicarrier EDGE waveform is available at the RF OUTPUT connector; it does not
include bursting or channel coding.
10. Press
Mode > Custom > Arb Waveform Generator, where Digital Modulation Off On is the first softkey.
11. Press
Multicarrier Off On > Multicarrier Define > More (1 of 2) > Load/ Store > Store To File.
If there is already a file name from the Catalog of MDMOD Files occupying the active entry
area, press
Edit Keys > Clear Text.
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