116 | Managing the Radio
Aprisa SRi User Manual 1.1.0
Radio > Radio Setup
Transmit frequency, maximum transmit power and channel size would normally be defined by a local
regulatory body.
RF CONFIGURATION
TX Power
The transmitter power is the power measured at the antenna output port when transmitting. The transmitter
power has a direct impact on the radio power consumption. The default setting is +26 dBm.
The maximum permitted transmitter power may be limited by the EIRP requirements. See
64 for details.
If TX Power setting is higher than the high limit or lower than the low limit for the current modulation, an
Informational Event (55 Terminal Unit Information) will be raised to notify the user that transmit power has
been changed. This only applies to fixed modulation (not ACM).
The Peak Envelope Power (PEP) is calculated based on current configured TX power settings and modulation:
•
QPSK
PEP = TX Power S 4 dBm
•
16 QAM
PEP = TX Power S 6 dBm
•
64 QAM
PEP = TX Power S 7 dBm
Note:
The Aprisa SRi transmitter contains power amplifier protection which allows the antenna to be
disconnected from the antenna port without product damage.