Javad HPT135 series Operator's Manual page 20

Configuration
Configuring HPT135
Power supply requirements
Parameter
Simplex Transmitter or
Simplex Transmitter to
Protocol
Repeater
For Base, Repeater, and Rover modems the protocol type must be the same.
Mode receiver/
Echo to serial port
Frequency Set the frequency in band 138-174 MHz with 6.25 kHz channel spacing.
For both Base and Rover modems the frequency must be the same.
Output power Select the transmission
power for the radio modem.
Modulation type Specifies a modulation scheme that will be used by your modem.
DQPSK is recommended.
For both Base and Rover modems the modulation type must be the same.
Link Rate The link rate is selected automatically
Link Space For both Base and Rover modems the link space must be the same.
Forward Error Enable
Correction
Scrambling Enable
1. In Auto mode rover receives the data from both base transmitter and repeater. The sophisticated
algorithm of data receiving allows the modem to eliminate any data doubling.
2. In this mode the incoming data from base transmitter will be ignored.
3. In this mode the incoming data from repeater will be ignored.
20
Table 2-1. Modem Parameters for the Radio Link Tab
Base Modem
Simplex Repeater
ON- enables echoing to
serial port;
-
OFF - disables echoing to
serial port
Repeater
Simplex Receiver
Auto - allows receiving data
from base and repeater in
auto mode
Only from Repeater - allows
receive data only from
repeater
Only from transmitter to
Repeater - allows receive
data from base transmitter
n/a
Enable
Enable
Rover Modem
1
.
2
.
3
.
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