WJ-8922 TSCM surveillance receiver

WJ-8922 TSCM surveillance receiver - top view

This is what you see when you open the briefcase. The main receiver is across the top. The main receiver controller is on the right. They communicate via serial control. The sub-carrier/HF receiver is in the middle. The blue box on the left is a Tektronix oscilloscope which is the the spectrum display unit.

Not much is known about this unit. WJ released a block diagram and some rudimentary user information on request but refused to release anything else at the direction of the original customer (who is unknown). It contains a digitally synthesized DC to 3 GHz receiver with bandwidths of 10, 75, & 300 kHz and 1 & 3 MHz. It also contains a separately controllable HF receiver (center black module) for demodulating subcarriers. The unit will demodulate AM, FM, CW, Pulse, USB & LSB. A miniature Tektronix oscilloscope provides spectrum displays. Also has scanning and computer remote control functions. A very unusual radio. Completely powered by 12 VDC.

A reader found a data sheet for a WJ-8922 built in a different manner. WJ often produced technical data sheets for prototypes or conjectural designs, some of which were completely redesigned before sale or, in some cases, were never sold.

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WJ-8922 TSCM surveillance receiver - front view

Set it on the desk in front of you as you start your mission and it looks like the photo above.

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WJ-8922 receiver controller

This is the controller for the receiver. Notice the scanning functions and the wide RF pan ranges.

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WJ-8922 secondary HF receiver

This HF receiver can be used for standalone or as a secondary demodulation unit to search for subcarriers.

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WJ-8922 RF, conversion and synthesizer stages

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WJ-8922 IF stages and pan adapter

This is the IF stages and the spectrum display generator that feeds the Tektronix oscilloscope.

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