284 | Managing the Radio
Aprisa SRi User Manual 1.1.0
Monitored Parameter
Function
Normal Operating Limits
Last TX Packet Forward
Power
Parameter to show the actual transmitter
power in dBm. The value is stored from the
last time the transmitter was active and
transmitted a packet.
This value will be dependent on the output
power, the ATPC setting, the temperature
and the VSWR of the antenna. The alarm
limits for the Tx forward power are +/-4
dB.
Last TX Packet Reverse
Power (note
1
)
Parameter to show the reflected power.
The value is stored from the last time the
transmitter was active and transmitted a
packet.
The value will be dependent on the
impedance presented to that antenna port
of the radio by the feeder and antenna
system. A reflected power of 15 dB below
the transmit power shows an acceptable
performance.
Last TX Packet VSWR
(note
1
)
Parameter to show numerically how well
the antenna is impedance matched to the
radio. The value is stored the last time the
transmitter was active and transmitted a
packet.
This value will be dependent on the feeder
and antenna performance, a value of
<1.5:1 shows acceptable performance. A
value of >3.0:1 would indicate that most of
the power is being reflected to the radio
and that there is a fault in the feeder or
antenna.
Current RF TX Duty Cycle
Parameter to show the average percentage
of the RF channel utilization
Dependent on the amount of TX traffic
Note 1: Currently only some hardware variants are capable of providing this data. If these parameters are
not shown on the Radio Parameters > Transmitter page, the hardware variant is not capable of providing
this data.
Controls
The Reset button clears the current results.
