Clear-com RM-702 User Manual download pdf (Page 30)

RM-702 TWO-CHANNEL REMOTE STATION

2-18

INTERNAL IFB OPERATION

To use either channel A or B as an IFB feed, connect the program source to

the program input (as described in the previous section) and set the Program

Interrupt A (or B) DIP switch to the on position. The program will now be

interrupted whenever there is a call signal present on channel B. If there are

multiple RM-702s in the system, the program should only be fed into one of

the RM-702s.

To interrupt the IFB program automatically when a talk rather than a call

signal is active on channels A or B, you must reset an internal jumper as

described in “Re-Setting Program Interrupt Options” earlier in this chapter.

EXTERNAL IFB (MA-704 AND PIC-4704

CONNECTION)

Clear-Com provides a stand-alone IFB system called a PIC-4704. The

PIC-4704 provides four interruptible IFB feeds from two program sources,

and is located in a central location. The MA-704 is a four-channel control

head intended to work with the PIC-4704. An MA-704 is located at each

location where program interrupt is to be initiated. Each MA-704 has its own

panel-mounted microphone which, when mounted next to an intercom station

with a panel mounted microphone, causes panel congestion with two

microphones at a single location.

The RM-702 has a 1/4 in. (0.64 cm) phone jack output on its rear panel

intended to connect directly to an MA-704 and provide a microphone feed to

the MA-704. The MA-704 can be ordered without a panel-mounted

microphone. When a button is pressed on the MA-704, a control signal will

temporarily transfer the microphone in use on the RM-702 to the MA-704,

muting any talks active on the RM-702.

To connect the RM-702 to an MA-704, use a two-wire shielded cable with

1/4 in. (0.64 cm) tip, ring, and sleeve jacks on each end. Connect the tip to the

tip, the ring to the ring, and use the shield to connect the sleeve to the sleeve.

Figure 2-15: Typical External IFB System Using a PIC-4704 and MA-704 with a

RM-702

Director

1/4” phone jack

Channel A

Channel B

RM-702

Stand-alone

IFB system

PGM 1

PGM 2

PIC-4704

Assistant

Director

1/4” phone jack

Power

Supply

PS-702

RM-702

To additional party line

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Clear-com RM-702 User Manual Page 30

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