Rohde & Schwarz 1094.0006.50, Руководство по эксплуатации

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CTS-K6 Windows
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Application CTSgo
1079.2001.01 67 E-3
The antenna to be used can be entered in the input field below. The input and output attenuation are
entered in two further fields.
Note:
For information about how to switch the portable part to service mode contact your manufacturer.
It is very difficult to determine the attenuation to be set for DECT devices empirically. On the one hand,
fixed parts or portable parts have no antenna connectors, which is why antenna couplers must be
used. On the other hand, neither portable parts nor fixed parts signal the power received at the
antenna to the tester as in the case of GSM mobiles. If there are no empirical values for PP or FP or
the coupler, they can only be derived from the two values NTP and BER. The NTP of portable part and
fixed part is typically 24 dBm. If no attenuation is entered on the CTS, the input attenuation can be
approximately determined from the difference between the measured NTP and the typical NTP. The
output attenuation is obtained via the BER, the bit error rate typically increases considerably starting
from a certain receiving level on the DUT. If the sensitivity of the DUT and thus the associated output
level of the CTS is known, the attenuation can again be approximately determined from the difference
between the expected output level and the set output level. In general, large limits should be selected
for the tests for determination of power and bit error rate in order to take into account the inaccurate
determination of the attenuation.
Fig.: FP Base settings dialog window