Viavi (formerly JDSU) SPM30 xDSL, T1, E1 Test Equipment

VIAVI (FORMERLY JDSU) SPM30

Selective Level Meter

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SPM30
Selective Level Meter
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SPM30 PRODUCT OVERVIEW  
 

The JDSU SPM-30 Pegelmesser Level Meters are used for level measurements on FDM communications systems operating with a small or medium number of channels. Owing to their compactness and operation free of a.c. power, these Level Meters are particularly suitable for mobile service in maintenance and for measuring on communications systems actually carrying traffic. So the SPM 30 is especially useful to Postal Administrations, Railways, or Public Utility Companies. Moreover, in service measurements on the VFT System FM 120 is possible (100 Hz bandwidth version). Owing to the accuracy and versatility of the SPM 30, many applications are also found in the original manufacture and testing of these systems or of the individual modules in a system. If the Generator has been incorporated, the combination is a complete measuring setup for attenuation and gain measurements. The send and receive frequencies can be offset from one another while making end to end measurements when the PS 30 Level Generator is used also.

A frequency synthesizer produces the local oscillator frequencies of the Selective Level Meter. Thus, the high accuracy and stability are assured by this modern technique. A manually rotatable knob gives a smooth flywheel effect while swiftly tuning over the complete frequency band in one range. Frequencies are presented on a digital display with 1 Hz resolution. Levels are measured in various bandwidths as either low noise or as low distortion. A large scale analog meter provides the level readings. The fine scale divisions of 0.1 dB and 5 dB scale offset assist the operator so that measurement errors may be kept small. Both voltage level and power level as well as voltages are measurable.


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