Rohde & Schwarz 1094.0006.50, Operating Manual

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CTS55 Getting Started With Autotest
1094.0006.55 3.13 E-7
Explanations:
In this step the power ramp, the phase error (PK) phase error (RMS) and the frequency error is
measured. These measurements check the quality of the transmitter of the mobile. Both the power
ramp graph and the frequency error graph can be displayed at the end of the Autotest sequence.
For the BER measurement the mobile is set into the "Loop Back" mode to send any the received bits
back to the CTS. The CTS compares the received bits with the bits sent out and calculates the BER.
The test sequence ends with this test step.
Note:
The mobile can only be set to the state "loop back" (using a signalling procedure) if a test SIM card is
used. Therefore measurement of the bit error rate is not possible without a test SIM card and the
Autotest is aborted with a signalling error.