Rohde & Schwarz 1094.0006.50, Руководство по эксплуатации

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Windows
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Application CTSgo CTS-K6
1079.2001.01 102 E-3
12.2 Extended GSM Test
In our second example, and extended test of a GSM900 mobile is to be performed. After a first call has
been set up by CTS, all kind of GSM transmitter measurements are to be performed in channels 1, 62
and 124 at the PCLs 5, 10 and 15. Statistical averaging over several bursts should not be performed
and the CTS output level should be –70 dBm. With these measurements terminated, the call is to be
cleared down by the CTS. The second call should be set up by the user and an echo test performed on
channel 62. The CTS output level of –60 dBm should be reduced for the subsequent BER
measurement over 50 frames. RXLev and RXQual of the mobile should also be checked. The call
should be released again by the user. The mobile is connected to the CTS by means of an RF cable
taken from a vehicle installation set; the cable loss is 0.5 dB.
•
Open the Configuration menu and select Network. Activate GSM900 in the Configure Network
dialog window. enter a power of –70 dBm for the location update. Terminate the dialog with OK.
•
Select the Test Parameters command in the Configuration menu. The Configure Test Parameters
dialog window is opened. Enter 31 for the BCCH. Enter 0.5 dB for input and output attenuation
according to the settings of the antenna coupler. Close the dialog window with OK.
•
Open the Select Tests dialog window by choosing Select Tests in the Configuration menu. Check
First Connection, Test Set 1, Test Set 2, Test Set 3. All other boxes should be empty. Confirm your
settings with OK.
•
Open the Configuration menu, select First Connect and activate Call from Base Station (CTS) in the
Configure First Connect dialog window. Confirm the settings with OK.
•
Open the Configuration menu and select Test Set 1. Enter 2 as TCH channel in the Configure Test
Set 1 window. Activate the boxes “5“, “10“ and “15“ in the TCH Power Levels fields. Enter –70.0
dBm for BS Power Standard. Check the boxes Frequency Error, Phase Error, Timing, Average
Burst Power and Power Ramp in the Measurements field. All other boxes in the Measurement field
should be empty. Close the dialog window by pressing OK.
•
Repeat this step for Test Set 2 but enter 62 for the TCH channel.
•
The procedure for Test Set 3 is the same as described for test set 1 but enter TCH channel 124.
•
Select First Disconnect in the Configuration menu. Activate Release from Basestation (CTS) in the
Configure first Disconnect dialog window. Confirm the selection with OK.
•
Open the Configuration menu, select the Second Connect item and activate Call from Mobile in the
Configure second Connect dialog window. Confirm the settings with OK.
•
Open the Configuration menu and select Test Set 7. Enter 62 as TCH channel. Check box 10 in the
TCH Power Level field and enter –70.0 dBm for BS Power Standard. Enter –102.5 dBm for BS
POWER BER. Check BER class Ib, BER class II, BER EFR, RXQual, RXLev and Echotest in the
Measurement field. All other boxes of the Measurement field should be empty. Close the dialog
window with OK.
•
Select Second Disconnect in the Configuration menu and activate Release from Mobile in the
Configure second Connect dialog window. Confirm the settings with OK.
•
Open the windows for the commands in the Limits menu one after the other; check and change the
limits for the individual measurements if you are not satisfied with the default values.