ZETRON 4000 Series, Руководство по установке

Страница: 50 / 418

Common Control Equipment Installation
50 025-9533Y
Table 13: Tone/Local Dual Channel Card (P/N 950-9820), Line-Impedance Jumpers
Channel Cross-Mute
Each channel may be configured so that the external Cross-Busy Input (X-Busy In) will
mute the audio of the channel to all console positions (see Table 14 ). This is useful to
prevent audio feedback between two channels on the same frequency at the same console,
or to prevent audio feedback between the Zetron consoles and other consoles present in
the same room. Each DCC has the same option.
Table 14: Dual Channel Card, Channel Cross-Mute Switch
Call Source
Each channel typically has its Call indicator source come from voice activity on the
channel (VOX) or from carrier activity on the channel Carrier Operated Relay (COR). A
carrier operated call requires an extra signal from the base station COR output. Normally,
each channel is configured for VOX operation, since extra signals are required for COR
Channel A
Tx/2W-Rx High-Impedance JP5-A
Tx/2W-Rx Low-Impedance JP5-B*
4W-Rx High-Impedance JP9-N
4W-Rx Low-Impedance JP9-Y*
Channel B
Tx/2W-Rx High-Impedance JP6-A
Tx/2W-Rx Low-Impedance JP6-B*
4W-Rx High-Impedance JP8-N
4W-Rx Low-Impedance JP8-Y*
* default normal factory setting
** for trunking cards use same settings as tone cards
Channel A
Channel Cross-Mute Switch Position
Cross-Mute Enabled “OPT” (switch 7) On
Cross-Mute Disabled “OPT” (switch 7) Off*
Channel B
Channel Cross-Mute Switch Position
Cross-Mute Enabled “OPT” (switch 3) On
Cross-Mute Disabled “OPT” (switch 3) Off*
* default factory setting