Clear-Com CS-702 - Manual (Page 20)

C S - 7 0 2 T W O - C H A N N E L M A I N S T A T I O N 2 - 4
Permanent Installation Cable
Vinyl-jacketed shielded pair is the cable of choice for permanent installations.
Use a low-capacitance 20-gauge wire for short runs (under 500 ft. [152.5 m])
and 18-gauge cable for runs greater than 500 ft. (152.5 m). Placing the cable
in conduit is recommended but not necessary.
Multi-pair cable that is individually shielded is acceptable for use in
multi-channel systems. For cross-talk considerations, the shields must be tied
together on both ends of the cable to produce the lowest possible DC path for
ground return.
INTERNAL OPTIONS AND ADJUSTMENTS
To access the internal options and adjustments, you must remove the station’s
cover to gain access to the internal circuit board.
Before removing the station’s cover ensure the power to the station is
disconnected.
Remove the screws on either side of the station. Remove the four screws on
the top of the station. Remove the cover.
Note: These adjustments should only be carried out by qualified service
personnel.
Figure 2-7 Location of Jumpers and Adjustments on PCB
1 JP-1 and JP-2 Line Length Selection Jumpers: Jumpers JP-1 and JP-2
allow the optimization of the hybrid null circuitry for excessive intercom
cable lengths. JP-1 is for channel A and JP-2 is for channel B.
2
1
3