Signal Level Meter Calibration Techniques (1970)
By Fred J. Schulz, Sterling Communications Inc.
The need to measure signal levels is an ever present one in any CATV system. The need to very accurately measure the absolute value of levels is a necessity in multichannel long cascade systems. In smaller systems it might have been adequate to correlate the readings of the various used meters irrespective of absolute calibration. This approach can no longer be defended.
The Signal Level Meter (SLM) is a basic tool of our trade, like the Ievel and plumb are for a mason. Periodic check of SLM's is an absolute necessity and must be done very carefully and with reliable standards since the performance of the whole CATV system depends on proper level settings.
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