Clear-Com AC-701, Инструкция по эксплуатации

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A C - 7 0 1 T E L E P H O N E A N D 2 - W I R E I N T E R F A C E
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SETUP
1. Connect the AC-701 to your Clear-Com system via the connector marked
‘Clear-Com Line’ on the rear panel, using standard two-conductor shielded
mic cable. The pin assignment on this 3-pin, XLR-type female connector is:
• Pin 1: Common
• Pin 2: Power
• Pin 3: Intercom audio
2. Select your mode of operation with the Mode Select switch: 2-wire, 3-wire, or
4-wire. The 2-wire mode is typically used with telephone-type carbon
systems.
The 3-wire mode is used with separate transmit and receive lines with a
common ground. This mode “looks” like a carbon headset, and can be used
to plug directly into the headset jack of a carbon system (such as a TV
camera).
The 4-wire mode is used when you have separate transmit and receive pairs.
Note: In the 3/4-wire mode, the B Balance control is not operative.
3. Connect the AC-701 to the external communication system via the rear panel
binding posts.
2-WIRE: Connect the AC-701 to all two wire systems using only the top
two binding posts (the red ones).
3-WIRE: For 3-wire systems, jump the two black binding posts together for
the common ground. Connect the red binding post marked “transmit”’ to
the portion of the circuit that the AC-701 sends signals on, and the other red
binding post (marked “receive”) to the portion of the circuit that the AC-701
is to receive signals from.
4-WIRE: For a 4-wire system, use all four binding posts: a red and black pair
for the transmit, and a red and black pair for the receive.
BALANCING THE INTERFACE
Note: Before balancing the system, be sure that the connections to both
Clear-Com and the external communication system have been made.
Balance cannot be achieved unless both systems are connected. Balance is
obtained with a built-in test tone via the A and B Balance switches.
2-WIRE MODE BALANCING: If your Clear-Com system is supported by a
main station with a master level control, turn the master gain control on the
Main Station fully counterclockwise. Newer Main Stations and Power Supplies
do not have a master gain.
1. Turn both gain controls on the AC-701 to the 10 o’clock position.
2. Plug a standard Clear-Com headset into the 4-pin XLR-type connector
marked “Headset” on the AC-701 front panel.