Wireless Related Products

Contact

Aldacom GmbH
Hans-Boeckler-Strasse 16
63263 Neu-Isenburg/ Germany
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German / English:
Tel +49 6102 7984895
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Fax +49 6102 7985780
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E-mail




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The need of GSM tester PDF
 

We would like to be helpful you in the development and testing of your products with our small and portable GSM testers you can measure RMS Phase, Peak Phase, Frequency Error, Burst Length, TX Level, RX Level and Bit Error Rate.

We offer this by renting or selling of GSM testers!


With our devices the following measurements are possible:

RMS Phase
This is the quadratic mean of the phase error of the GSM synchronization signal in degrees. If this value is too high then the GSM module will lose synch and the mobile device will lose the connection to the base station.

Peak Phase
This is the maximum phase error of the GSM synchronization signal in degrees. If this value is too high then the GSM mobile will lose synch and the mobile device will lose the connection to the base station.

Frequency Error
This value specifies the difference in the frequency generators and the target frequency. On GSM 900 the maximum permissible error is ±115 Hz and on GSM 1800 it is ±230 Hz. As a percentage it is 0.00013%. If the value is too high the GSM module will use the wrong channel and will lose the connection to the base station.

Burst Length
This is the length of one GSM time slot. The standard length (time) is 543 µs. The allowed delta is ±10 µs which is 1.8%. If the value is too high the GSM module will lose parts of the time slot, voice calls will break up or the connection will be lost.

TX Level
Is the transmitting power level measured in dbm. If the level is too low then the base station will stop receiving a signal and the connection will be disconnected. If it is too high then the receiving signal of the other GSM mobile will break up.

RX Level
This is the received field strength of the GSM module. If it is too low the GSM module will not be able to initiate a call.


Bit Error Rate
This value tells you how many bits the GSM module has received without error. The maximum bit error rate at 104 dBm is 3%. If this value is too high then parts of the communication will be lost or control commands of the base station will be lost and the communications may break up or will be cut off all together.

 
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