4RF Aprisa SR+ User Manual - page 108
106 | Managing the Radio
Aprisa SR+ User Manual 1.5.3
MODEM - Base / Repeater/ Base-Repeater Station
Modulation Type
The base to remote / repeater or repeater to remote / base direction of transmission is always fixed i.e.
not adaptive.
This parameter sets the fixed TX Modulation Type for the base / base-repeater / repeater radio.
Option
Function
QPSK (High Gain)
Sets the modulation to QPSK with Max Coded FEC.
QPSK (Low Gain)
Sets the modulation to QPSK with Min Coded FEC.
QPSK
Sets the modulation to QPSK with no FEC.
16QAM (High Gain)
Sets the modulation to 16 QAM with Max Coded FEC.
16QAM (Low Gain)
Sets the modulation to 16 QAM with Min Coded FEC.
16QAM
Sets the modulation to 16 QAM with no FEC.
64QAM (High Gain)
Sets the modulation to 64 QAM with Max Coded FEC.
64QAM (Low Gain)
Sets the modulation to 64 QAM with Min Coded FEC.
The default setting is QPSK (Low Gain).
The base / base-repeater radio TX modulation will be set based on the worse case (RSSI) path profile
scenario of all the radios (remotes and repeaters) in one hop distance from the base / base-repeater
radio.
The repeater radio TX modulation will be set based on the worse case (RSSI) path profile scenario of all
the radios (remotes and base) in one hop distance from the repeater radio.