Hybrid Coupler Installation and Operations Manual Page 3
Technical or Setup Assistance
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The Hybrid Coupler is designed for easy installation and setup. All necessary
interface connections are made through rear-panel jacks. This allows for easy
installation, removal and service. To install your Hybrid Coupler, follow these
instructions:
Completed Installation
When installation is complete, the Hybrid Coupler configuration should
resemble Figure 4 (left).
Step 1 — Back-Panel Connections
Send
The Hybrid Coupler’s SEND input [5] (See Figure 3, previous page; Figure
5, left.) consists of a single quarter-inch phone jack. Any audio applied to
this input will be sent to the caller. The level of send audio is determined by
the level of the source and the position of an internal limiter jumper option.
The limiter option is detailed in Step 2 — Limiter Option (Page 4).
AUDIO WIRING NOTE:
To connect an active balanced audio source to the Hybrid Coupler’s SEND input
or RECEIVE output, Gentner Communications recommends that a ground of
source equipment be connected to the SLEEVE and that the (+) audio side by
connected to the TIP. If a transformer-coupled balance source is to be used, in
addition to the wiring noted in Figure 4, the (-) audio should be connected to
sleeve.
Receive
The Hybrid Coupler’s RECEIVE output [6] also consists of a single quarter-
inch phone jack. This output is unbalanced (referenced to the unit’s ground)
and has the electrical connections specified in Figure 5 (above):
When active, the unit delivers caller audio to this connector. The Hybrid
Coupler does not amplify its receive port; thus, the output is typically at
phone line level or -20dBm.
RECEIVE OUTPUT NOTE:
The Hybrid Coupler’s receive output is never muted. In the OFF position, the
SEND to RECEIVE level is approximately unity gain with severe distortion.
Set
The SET connector [7] is a standard RJ11C connector (Figure 6, left). Plug a
telephone to this jack.
Line
The LINE connector [8] is also a standard RJ11C connector. Plug the
telephone line into this jack.
Step 2 — Limiter Option
The Hybrid Coupler incorporates both a send-level limiter and a receive-level
limiter. These limiters are maximum level clippers. If the limiter is
jumpered ON, the maximum possible transmitted or received level is 2.2V
peak to peak (approximately 0dBm).
Installation
Figure 5. Send input connector
Figure 6. RJ11C jack
Figure 4. Hybrid Coupler completed
installation
