105 Radio/Serial Telemetry Module
User Manual
Page
46
©
March 2000
Single channel
synthesised
Direct frequency modulation
Frequency
405 - 490 Mhz
12.5 kHz channel spacing
Transmit power
Adjustable
10 - 500 mW
Spurious emissions
RX - <-57 dBm
TX - <-37 dBm
Frequency Stability
+/- 1.0 kHz
Receiver Sensitivity
0.4uV at 12dB SINAD
Signal detect / RSSI
-120 to -80 dBm
Expected line-of-sight range
2 km @ 10mW EIRP
5 km @ 100mW EIRP
10 km @ 500 mW EIRP
Range may be extended by up to 5
intermediate modules as repeaters
Aerial Connector
Female BNC coaxial
Protected by gas discharge surge
arrester
Radio Transceiver (905U)
Type
Spread Spectrum
Frequency Hopping
Frequency
902 - 928 Mhz
250 kHz channel spacing
Transmit power
Adjustable
100 mW – 1 W
Spurious emissions
RX - <-57 dBm
TX - <-37 dBm
Frequency Stability
+/- 10 kHz
Receiver Sensitivity
0.4uV at 12dB SINAD
Signal detect / RSSI
-120 to -80 dBm
Expected line-of-sight range
10 km @ 100mW EIRP
20 km @ 500 mW EIRP
Range may be extended by up to 5
intermediate modules as repeaters
Aerial Connector
Female SMA Coaxial
Serial Ports
RS232 Port
DB9 female DCE
9600 baud, no parity, 8 data bits, 1
stop bit
RS485 Port
2 pin terminal block
9600 baud, no parity, 8 data bits, 1
stop bit,
Typical distance 1km
Data transmission
On change-of-state
+ integrity update
Update time configurable
Protocol - serial
- radio
asynchronous ARQ, with
16 bit CRC
synchronous ARQ
Automatic acknowledgments with up
to 4 retries
Communications fail status
May be mapped to local or
Resetting of outputs on comms fail
