Clear-Com RM-702 - Manual (Page 22)

R M - 7 0 2 T W O - C H A N N E L R E M O T E S T A T I O N 2 - 1 0
Figure 2-9: Location of Panel Mic Gain Adjust Control R161
INTERCOM LINE LENGTH COMPENSATION
(REAR-PANEL DIP SWITCHES)
The receive circuits of the intercom channels have been optimized for an
intercom line length of up to 1,000 ft. (304.8 m). The capacitance of the
intercom line must be compensated for in the receive circuits if a good
sidetone null is to be achieved. When using a speaker, a good sidetone null is
necessary to achieve a usable listening level.
A set of two rear-panel DIP switches have been provided to compensate for
lines longer than 1,000 ft (304.8 m). Each intercom channel has its own DIP
switch.
To change the setting of the line length compensation DIP switches, move
either the long line A or long line B DIP switch to the “on” position for
intercom lines longer than 1,000 ft. (304.8).
PROGRAM FEED ON ANNOUNCE
You can set up the announce feature so that program audio is sent out on the
announce line as well as the announce audio. You set this option up by using
an internal jumper on the circuit board.
To send out program audio along with announcements:
1. Please observe anti-static procedures. Static electricity can damage a circuit
card. Please ground yourself and tools before touching the circuit card.
2. Remove the cover of the RM-702 unit by removing the eight Phillips
screws.
3. Locate the JP2 three-pin jumper on the centermost front portion of the
circuit card.
A jumper plug covers pins 2 and 3 of the jumper. This is the off position.
R161
GAIN ADJUST