Simplex Protocol - Javad HPT204BT Series Operator's Manual

2.5.1. Simplex Protocol

When the HPT204BT modem is loaded with special firmware which supports Simplex protocol
ModemVU general window will be like below:
1. On the Radio Link tab, set the following parameters (Table 2-1) and click Apply.
Parameter
Protocol
Mode receiver/
Echo to serial port
Frequency
Output power
Modulation type
Link Rate
1. Simplex protocol is a communications protocol that is purely one-way, and where acknowledgments are not part of any application
protocol.
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Figure 2-4. Radio Link tab. Simplex protocol
Table 2-1. Modem Parameters for the Radio Link Tab
Base Modem
Simplex Transmitter or
Simplex Transmitter to Repeater
For Base, Repeater, and Rover modems the protocol type must be the same.
-
Set the frequency in band 215-255 MHz
For both Base and Rover modems the frequency must be the same.
Select the transmission power
for the radio modem.
Specifies a modulation scheme that will be used by your modem. QPSK is recommended.
For both Base and Rover modems the modulation type must be the same.
The link rate is selected automatically
Repeater
Simplex Repeater
ON- enables echoing to
serial port;
OFF - disables echoing to
serial port
4
with 6.25 kHz channel bandwidth.
Configuration
Configuring HPT204BT
Simplex Protocol
Rover Modem
Simplex Receiver
Auto - allows receiving data
from base and repeater in
1
auto mode .
Only from Repeater - allows
receive data only from
2
repeater .
Only from transmitter to
Repeater - allows receive
data from base transmitter
n/a
1
, the
3
.
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