FreeWave Technologies
April 10, 2009
400 MHz Licensed Installation Manual
V1.0
LIG0011AA Rev A
4 of 6
changes in transceiver’s configuration. But there is one parameter that
must be considered
for a new installation – transceiver’s power output settings.
Note: It is the installer’s responsibility to ensure that the emission limits are not
exceeded
.
B. Transceiver Location
Placement of the FreeWave transceiver is likely to have a significant impact on its performance.
In general the rule of thumb with FreeWave is that the higher the placement of the antenna the
better the communication link - height is everything! In practice you should also place the
transceiver away from computers, telephones, answering machines, and other similar equipment.
When using an external antenna, placement of that antenna is critical to a solid data link. Other
antennas in close proximity are a potential source of interference; use the Radio Statistics or
Diagnostics software to help identify potential problems. It is also possible that slight adjustments
in antenna placement (as little as 2 feet) will solve noise problems.
C. Board Level Pin Assignments
The board level transceiver uses standard RS232 polarity and voltage levels for all of the RS232
signal lines (DTR, Transmit Data, Receive Data, Carrier Detect, RTS, and Clear to Send).
Pin 1: B+ Power input.
Pin 2: Interrupt (INT) – Input – A 0 volt level on this pin will switch the radio into setup mode.
Note: Pin 1 on the LRS-455 board level transceiver is the pin farthest from the three
LEDs and pin 10 is closest to the LEDs.
D. Power Connection
The LRS-455 series transceivers can be operated from any Class 2 power source, input voltages
vary by model. The power source should be capable of providing at least 0.8 amperes of
Table 4:
Board Level
Transeiver Pinout
Pin Signal
Assignment
1 Input
B+
input
2
Input
Interrupt (Ground to invoke menu)
3 Input
DTR
4
Ground
5 Output
Transmit
Data
6
Ground
7 Input
Receive
Data
8 Output
Carrier
Detect
9 Input
RTS
10
Output
Clear to Send
Remote Site Products - 1-888-532-2706 - www.remotesiteproducts.com
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