Specifications
R2 Lite FH915 Internal Modem Board Details
9-7
P/N: 1023998-01
Adjacent Channel Selectivity
If rare occurrence of base and rover receivers’ interference is reported, the user has the following
options:
1. Use an alternate licensed channel that is more than one channel away from the adjacent
transmitter; or
2. Decrease the distance to the transmitting base station by relocating the base closer to the rover
position, thus increasing the signal level received at the rover by more than 6 dB.
Receiver Spurious Response Rejection
If the radio receiver is disturbed by a spurious frequency, one of the following proposal candidates
can be used:
1. Use an alternate licensed channel that is located farther away from the spurious frequency; or
2. Decrease the distance to the transmitting base station by relocating the base closer to the rover
position, thus increasing the signal level received at the rover by more than 4 dB.
R2 Lite FH915 Internal Modem Board Details
Table 9-3 describes HiPer VR’s optional R2 Lite FH915 modem specifications.
The R2 Lite FH915 Internal Modem Board is not available in the European Union.
Table 9-3. R2 Lite FH915 Internal Modem Board Specifications
Item Specification
Frequency Range
Country/Region/Purpose
Dependent
• 902.2 MHz – 927.8 MHz (128 channels), USA
• 915.2 MHz – 927.8 MHz (63 channels), AUS
• 920.8 MHz – 927.8 MHz (36 channels), NZL
Signal Structuring Frequency-hopping spread spectrum
Hopping Pattern 5 per band, user-selectable
Hopping Channels 128 Channels
Occupied Bandwidth ± 100 KHz
Frequency Modulation
Technique
FSK, 64 Kbps
Network Topology Point-to-point, Point-to-multi-point
System Gain 135 dB
Operation Mode Transmitter, receiver, repeater
Protocol FH915
Transmitter Carrier Power 250 mW (24 dBm)/1-W (30 dBm), user selectable
Receiver Sensitivity
-105 dBm at 10
-4
BER
Receiver Dynamic Range 105 dB
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