User guide

TW-60 PUBLIC SAFETY RADIO INTERFACE
1-3
• Channel 1 - 4 Radio Connectors: These four DB-9F connectors are used to
connect control and audio signals to the base station two-way radios on each
channel.
• Channel 1 - 4 Matrix Audio Connectors: These four RJ-45 connectors are
used to connect the 4-wire audio signals to the Matrix port.
• Channel 1 - 4 Setup Switches: These 3 dipswitches on each channel control
the audio level interface and transmitter keying protocol for each two-way radio.
Refer to Table 3.
TRANSMIT DELAY
For each of the four interface channels, a knob is provided on the front panel to
set the amount of time that audio will be delayed before it is transmitted. The
Transmit Delay is adjustable as follows:
Table 1: Transmit Delay Switch Positions
In many trunking radio systems, the delay from keying a transmitter to having a
voice channel ready for use may be variable. The Automatic Transmit Delay
setting is useful in this situation to provide the minimum delay necessary for a
complete voice transmission. When set to automatically delay the transmitted
voice, the TW-60 listens for the tones the two way radio is producing and delays
the transmission of the voice until the tones stop.
POSITION ACTION
0 Delay is off, speech transmits immediatley
0.25 Delay is 0.25 seconds
0.5 Delay is 0.5 seconds
0.75 Delay is 0.75 seconds
1Delay is 1 second
1.5 Delay is 1.5 seconds
2Delay is 2 seconds
2.5 Delay is 2.5 seconds
3Delay is 3 seconds
4Delay is 4 seconds
5Delay is 5 seconds
Auto Delay is adjusted automatically