Noise Measurement Equipment

Radiometer System for Satellite Ground Systems Noise Measurement

Precise noise measurement in RF circuits is a technique, which Callisto has mastered by necessity through our work on ultra low noise amplifiers and receivers.

Callisto has developed noise measurement equipment for use in satellite ground systems. Typical applications include monitoring reception system noise temperature, antenna G/T measurement and antenna calibration.

Modes of Operation

The Radiometer system developed by Callisto has two modes of operation:

Total Power Mode (TPR) and
Noise Adding Mode (NAR)

The TPR mode is used when the highest level of sensitivity is required.

Specifications

Noise Temperature Measurement	Total Power Mode	Noise Adding Mode X-Band	Noise Adding Mode Ka-Band
Resolution (dB) / Integration Time (ms)	0.01dB = 10ms 0.005dB = 100ms 0.005dB = 1s	0.02dB = 10ms 0.01dB = 100ms 0.005dB = 1s	0.1dB = 10ms 0.05dB = 100ms 0.02dB = 1s
Overall Measurement Accuracy	N/A	6% Rss	6% Rss

Parameter	Specification
Range of Noise Temperatures	X-Band: 100K to 200K Ka-Band: 75K to 150K
RF Measurement Bands	X-Band: 8400 to 8500MHz Ka-Band: 31800 to 32300MHz
IF Measurement Bands	X-Band: 540 to 640MHz Ka-Band: 420 to 620MHz
Measurement Bandwidth	X-Band: 100MHz Ka-Band: 220MHz

Radiometer Unit

Applications

Callisto has delivered operational radiometers for:

ESA (European Space Agency)
ISRO (Indian Space Research Organisation)

For more information, pricing or custom options, please contact us