2201R Mobile Tester User Guide
Chapter 3 Performing manual tests and measurements in GSM mode
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Performing standard transmitter tests
This section shows how to read and interpret the transmitter measurement results after a call has been set up.
In order to set up a call, follow the instructions on either page 53 or page 55.
The GSM Tests menu and the GSM Power menu present the following transmitter measurement parameters with
results. The latter menu can be accessed from the GSM Tests menu by pushing the Power Meas. soft key while a
call is active.
TX Power
This result field shows the measured transmit power of the mobile phone under test. Ideally it equates the MS Power
value entered. The tolerance values depend on the power level, see ’Power control levels and tolerances’ on page112.
Freq. Error
This result field indicates how the actual carrier frequency deviates from the nominal frequency. It is measured in
hertz. According to the specifications, the maximum allowable relative error is 10
-7
; that is, approximately ±90 Hz in
the GSM 850 and GSM 900 bands, ±180 Hz in the GSM 1800 band and ±190 Hz in the GSM 1900 band.
Phase Peak
The peak phase error is the magnitude of the maximum phase error that occurred within a single burst. This value is
always positive.
According to the specifications, the peak phase error within a GSM burst must not exceed 20°.
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