AValon RF TX600 Series - Manual (Page 16)

AVALON RF, INC. Page 13
TX500 Series User’s Guide & Operating Manual
3. Operating the transmitter.
Before applying power, make sure all connectors and all antennas
are hooked up.
NOTE
The transmitter will not transmit unless it has an antenna.
3.1 The transmitter has two operator controls and one indicator:
a) Channel select.
Units that have a manual synthesizer have a 4-position dip switch
that selects a channel number (from 1 to 16). The preset channel
numbers are defined by a label on the side wall of the transmitter.
The user is advised to select a channel within the permissible
frequency range to begin with, and if any interference is observed,
switch over to another channel.
b) On/Off switch.
3.2 The wireless data link is a secondary/utility link that is used to transfer
data/voice in the reverse direction and some alarms/telemetry data in
the forward direction. It is a narrow band UHF link operating at 492
MHz (but can be placed anywhere between 450-900 MHz if the user
has a licensed frequency).
Following are the characteristics:
a) VOICE: Voice is transmitted from the receiver (DX side) to the
Transmitter side (TX side). It is implemented as a VOX (voice
operated transmit) and only the headset microphone is used on
the DX side & only the earpiece is used on the TX side. The
microphone is an electret mic.
b) DATA: The data rate is 9.6KBaud fixed (other data rates upto 56K
supported) on a RS485 interface.
c) TELEMETRY/ALARMS: This data is sent about 5-6 times a
second.