FreeWave Technologies
900 MHz High Throughput Installation Guide
V10a
LIG0006AA Rev A
7 of 8
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.
To improve the data link, FreeWave Technologies offers directional and omni-directional
antennas with cable lengths ranging from 3 to 200 feet.
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. In extreme cases, such as
when the transceiver is located close to Pager or Cellular Telephone transmission towers,
FreeWave offers a band pass filter to reduce the out of band noise.
C. Board Level Pin Assignments
The board level transceiver uses standard TTL polarity and voltage levels for all of the signal lines
(Data Terminal Ready, Transmit Data, Receive Data, Carrier Detect, Request to Send, and Clear
to Send).
Pin
Signal
Assignment
Color on ACS3610xx
cable
1 Input B+
input
Red
2 Input Interrupt (temporarily ground to invoke
menu)
Brown
3
Input
Data Terminal Ready (DTR)
Orange
4
Ground
Black
5
Output
Transmit Data (TXD)
Yellow
6
Ground
Black
7
Input
Receive Data (RXD)
Green
8
Output
Carrier Detect (DCD)
Blue
9
Input
Request to Send (RTS)
Violet (purple)
10
Output
Clear to Send (CTS)
Gray
Note: Pin 1 on most all of the FreeWave board level transceiver is the pin farthest
from the three LED’s and pin 10 is closest to the LED’s. The exception to this
rule is the “Mini” footprint where pin 1 is closest to the center of the board
(near the RF connector) and pin 10 is toward the corner of the board.
Diagnostic ports:
The FGR-HT will use 1 of 2 Diagnostic cables to configure the radio. The board level Transceiver
will use FreeWave part number ASC2009DC for the serial communication to the Diagnostic port.
Table 4:
Board Level
Transceiver Pin-out
