Clear-Com FOR-22 - Manual (Page 8)

Vitec Group Communications
FOR-22 Dual 4-Wire Interface Instruction Manual
1 - 2
The installation chapter of this manual gives more information on
interface frames and on wiring the FOR-22 unit to the matrix and to
external devices.
OPERATION
In normal use, the FOR-22 interface does not require operator
interaction. Each channel features the same set of front panel
controls:
• A "send" level control
• A "receive" level control
• A "send level" LED
• A "relay active" LED
"SEND" CONTROLS
The "send" controls affect the level of the signals from the matrix to the
external devices. This control should be adjusted so that the "send
level" LED (see below) lights green when a signal is present.
Occasional red flashes due to peaks in the audio signal are
acceptable. The "send" controls have a range of ± 10 dB.
"SEND LEVEL" LEDS
The 2-color "send level" LED lights green when the audio signal is
being sent to the external device at a typical acceptable level. The LED
lights red when the audio output signal level is too high.
"RECV" CONTROLS
The "recv" ("receive") level controls affect the level of the signals sent
from the external devices to the matrix. The "recv" controls have a
range of ± 10 dB.
RELAY ACTIVE LED
The amber "relay" LED lights whenever the relay is activated.