Rohde & Schwarz 1094.0006.50, Operating Manual

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CTS-K6 Windows
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Application CTSgo
1079.2001.01 79 E-3
Class II, the maximum permissible BER of which is to be specified in the first input field, contains
unprotected bits. These bits normally transfer data that do not seriously impair transmission when the
bits are lost. Bits of class Ib are protected, ie they can be restored by means of error correction. Enter
the maximum permissible BER of class Ib in the second field. The bits are organized in frames for the
employed BER measurement. This test method is also called residual bit error rate (RBER). If large
errors occur within a frame, the respective frames are erased. The tolerance for frame erasure (EFR)
can be entered in the third field.
The BER largely depends on the CTS output power used for this measurement. The output power can
be set in the Configure Test Set window. You may have to know and enter the path attenuation
between CTS and DUT, as even minor variations of the mobile input level may cause considerable
changes of BER near the maximum sensitivity of the mobile. the number of frames used for the BER
measurement should be entered in the Test Parameters dialog window.
The selected upper limits for the BER are indicated in the third column of the measurement report (see
above).
7.6.4 RXQual /RXLev
RXQual and RXLev are measurements performed by the mobile. Measurement results are sent
cyclically to the base station (CTS) in the form of measurement reports. The RXQual measurement
informs on the receive quality of the mobile. Enter the maximum permissible RXQual in the first input
field. Each RXQUal corresponds to a specific BER which can be seen from the table below.
Fig.: Limits BER dialog window
Fig.: Extract from measurement report: BER measurements
Value of RXQual Receive quality of signal (BER)
0 < 0.2%
1 > 0.2% to <0.4%
2 > 0.4% to <0.8%
3 > 0.8% to <1.6%
4 > 1.6% to <3.2%
5 > 3.2% to <6.4%
6 > 6.4% to <12.8%
7 > 12.8%