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Chapter 2 407
Performance Verification Tests
58. GSM Phase and Frequency Error (Options BAH and B7E)
1. Set up the equipment as shown in Figure 2-76.
2. Preset the signal generator by pressing the
PRESET hardkey.
3. To enter the GSM setup, press the following signal generator keys:
MODE, Real Time I/Q Baseband
TDMA, GSM
4. Press the Data Format Continuous/Framed softkey and highlight
Framed to select a single time slot.
5. Turn on the GSM setup screen by pressing the
GSM ON/OFF softkey
and highlighting
ON.
6. Turn RF on by pressing the
RF ON/OFF softkey.
7. Set the signal generator frequency to the first frequency listed in
Column 1 of Table 2-114.
8. Set the signal generator amplitude to the first amplitude listed in
Column 2 of Table 2-114.
9. Set the analyzer to measure GSM phase and frequency error by
performing the following steps:
a. Preset the analyzer by pressing the
Preset hardkey.
b. Enter the GSM personality by pressing the
Mode hardkey
followed by the
GSM softkey.
c. Initiate the phase and frequency measurement by pressing the
Measure hardkey followed by the Phase and Frequency softkey.
d. Use the first frequency listed in the Table 2-114 by pressing the
Frequency hardkey, Channel Freq and entering the numeric value.
10. Press
Meas Setup. If the Average Type softkey is present, press
Average Type to highlight Mean.
11.Press
Average Number, 10, Enter.
12.Press
Single. The analyzer will make ten measurements and report
the average values for peak and RMS phase errors and frequency
error.
13.Enter the peak and RMS phase errors and the frequency error in the
appropriate row of Table 2-114.
Table 2-114 GSM - Phase and Frequency Measurement Table
ESA/ESG
Frequency
(MHz)
ESG
Amplitude
(dBm)
Phase Error (deg) Frequency
Error (Hz)
Peak RMS
900 0