Watkins-Johnson Company WJ-8718A Instruction Supplement page 6

Figure 2: A6 I/O mainboard of a WJ-8718A/MFP 1-Hz resolution receiver (bottom side).
Figure 3: Factory-installed wire-wrap wiring for the 1-Hz Option in a WJ-8718A/MFP
radio (A6 I/O mainboard partial view, bottom side).
6