This measurement demodulates the GSM/GPRS/EDGE signal and displays the vector with Phase Error, EVM, Origin Offset, C/I, Modulation Type and Magnitude Error (as applicable). See Figure: GSM Demodulator Measurement and Figure: EDGE Demodulator Measurement. To demodulate the GSM/EDGE signal:
1. Set the frequency as described in the User Guide.
2. Press the Setup main menu key.
3. Press the GSM/EDGE submenu key and highlight Auto to automatically select the GSM or EDGE signal.
Note
Highlight GSM or EDGE to set the instrument to measure only a GSM or EDGE signal.
4. The instrument has automatic external reference frequency detection or, if equipped, activate GPS to get GPS High Accuracy frequency error measurements. Refer to the User Guide for GPS setup information.
5. Press the Measurements main menu key.
6. Press the Demodulator submenu key.
GSM Demodulator Measurement
Note
Using multi‑channel spectrum, channel cursor, select the channel and press the Demodulator submenu key and the unit will demodulate the selected channel.
EDGE Demodulator Measurement
To display the GSM/EDGE Summary screen (Figure: GSM/EDGE Summary), press the GSM/EDGE Summary soft key.
