Join Date: Feb 2006
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We have had this done twice
Terry, no splices means wire-to-wire splices. Radars are fouled up by two things when it comes to cable splices. The impedance/resistance/continuity of each splice is different and not enough attention to the length of the splice can induce timing errors.
The junction box is simply a dry enclosure for a high quality, low resistance terminal block. With each wire cut and stripped with the proper tool and a connector properly applied, the electrical and time delay issues are avoided. We also put silica gel packets in the box, and we covered the connections with dry silicon lube. The first radar was working 10 years after we did this (same reason as you). We had the current radar installed this way.
[On higher power radars with wave-guide used between the antenna and processor a terminal block won't do it]
Hopefully in the situation you describe, the wires were simply cut and sections were not taken out.
We had a technician do this both times, but I would tackle it if necessary.