Abstract: A RF front end to an IF generator and post-processor whereby the IF generator output is variable. The transceiver up-conversion path includes an IF Filter, the output of which is input to a mixer with the output of a fixed Phase Locked Oscillator (PLO). The mixer output is input to a band-pass filter and amplified. With a single antenna configuration, the amplifier output connects to either an internal or external diplexer that interfaces to the antenna. With a dual antenna configuration, the amplifier output interfaces directly to the antenna. Similarly, the down-conversion path includes an internal or external diplexer in the single antenna configuration, a band-pass filter, a RF amplifier, a mixer that receives the RF amplifier output and the fixed PLO as inputs, an IF Filter, IF amplifier, and an attenuator for interfacing to the IF post-processor.

Abstract: A polarity change box for selectively reversing the polarity of balanced nals and for simultaneously monitoring control and data signals while injecting a test signal. The box includes an input connector and an output connector for receiving and transmitting signals, respectively, and a plurality of circuits for transmitting balanced signals. Each circuit includes a pair of input leads from the input connector and a pair of output leads from the output connector which are electrically connected to a double pole double throw switch. Test points are electrically connected to each output lead. The switch may be selectively positioned in a "normal", "inject", or "reverse" position. In the "normal" position, the first and second input leads are electrically connected to the first and second output leads, respectively, and the output signal has the same polarity as the input signal. In the "inject" position, the switch opens the circuit allowing a test signal to be injected.

Abstract: A jig for assembling a Kellems grip connection on a coaxial cable has a p of spaced members having aligned apertures extending therethrough and means for securing the two members with their apertures in alignment. One of the members is formed by a pair of abutting elements with opposed edges having recesses therein which cooperatively provide the aperture extending therethrough, and these elements also have cooperating elements on their faces which seat the end of the collapsible sleeve of a Kellems grip connector placed therebetween. The members are moved relative to each other to collapse the Kellems grip sleeve and effect its radial expansion to permit the feeding through the sleeve of bundles of reinforcing strands of the cable to a point where they can be looped about the Kellems grip mesh adjacent its connector element.