Calibrating the CMD Output Level for BER Application Note

PublishTime：2022-04-02

Specifications for Static Reference Sensitivity for the newest generation of GSM base station receivers are becoming more stringent, so that a correspondingly high BER level accuracy for the test instrument is very important. Using an FSE spectrum analyzer (option FSE-B22 required) together with an NRVD powermeter and an FSE-Z4 power sensor, the accuracy of the CMD 57 output level at output RF OUT 2 can be increased considerably. The calibration takes place at a higher output power level where it can be measured directly by the sensitive FSE spectrum analyzer. A precise external attenuator is used afterwards to achieve the required level range. The described method is used in CMD-U92 ("Special calibration for CMD57: Output Level -85 dBm to -91 dBm at 50 dBc adj. TS") and can also be used to recalibrate the CMD57 on site.

Brand of Product：	R&S
Part#：	CMD57 、 CMD59 、 FSE 、 NRVD 、 FSE-B22 、 FSE-Z4 、 CMD 57 、 CMD 59 、 NRV-Z4 、 FSEA20 、 FSEA30 、 1050.9008.57 、 1050.9008.59 、 1065.6000.20 、 1065.6000.30 、 1106.3480.02 More Part#
Product Category：	NRVD power meter 、 FSE spectrum analyzer 、 GSM base station receivers 、 NRVD powermeter 、 Power Meter 、 Communication Tester 、 Spectrum Analyzer More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	01/2000
Version Number：
Data Encoding：	1MA24_0e
Data Size：	131 KB

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