Microwave receiver and panoramic card

  • Processing and displaying of the spectrum
  • Lupe panoramic display
  • Indication of the signal field-strength
  • measurement of the signals bandwidth
  • selection the filters
  • in panoramic mode it can control four receiver card
  • Panoramic view of down converted microwave frequency band
  • 14 MHz wide video signal output
  • 70 MHz standard IF output

Reason of development of the Panorama and receiver card

Intercepting and monitoring radio signals in the microwave band has emerged the necessity to design cheap but useful device. It can monitor more than 1 GHz bandwidth, measure each trans signal bandwidth, and control more than one receiver on the same time. In the microwave band there are a lot of radio transmission, not only line of site, but satellite as well. Monitoring numerous radio signals with off the shelf panoramic and other receivers is frightfully expensive.

Design of Panorama and Receiver card

The experts of Carinex have designed a panoramic receiver and receive-card family. They can be put into an IBM PC or clone. They receive the first satellite IF band, 950-1750 MHz, or 950-2050 MHz. The real signal must be downconverted into one of their bands. The card-family can display, filter, and demodulate the downconverted radio signals, especially FM/FDM modulated carriers.

Functional concept of panoramic and receiver card family

The downconverted signal goes into an additive mixer with the signal of the first local oscillator. In panoramic mode the local oscillator is linearly tuned, in receiver mode fix tuned according to the frequency of the designated signal.

The oscillator frequency controlled by the software of the host computer. The mixing product is the 70 MHz standard IF. When the signal bandwidth is 30 MHz.

For optimal detection and demodulation, there is a pre-defined filter bank of SAW filters. There is an option when the customer can order other type of the filters, or other bandwidth. The outputs of the filters are connected to the independent FM demodulators which are designed working optimally with the corresponding filter. The outputs of the demodulators are switched to the video output by a software controlled multiplexer.

Main features of panoramic and receiver card

RF IN 950-2050 MHz
Noise factor Fn < 12 dB
Image rejection 50 dB
Intermod. rejection 70 dB
VSWR max. 3 dB
Dynamic range >50 dB
IF bandwidth 1, 2.5, 5, 7.5, and 16 MHz
Min. tuning step 8 kHz