Spread Spectrum Wireless Data Transceiver User Manual
LUM0002AG Rev D
Version 7.0
38
I
MPORTANT
N
OTES
1.
Lowpower Mode is used only in MultiPoint Slaves using serial protocol. Power savings occur only
when the Slave is linked. No power savings occur when the Slave is transmitting data. Lowpower
Mode is of little value when a Slave has a constant, high throughput. MCUSpeed must be set to
‘0’ and RF Data Rate must be set to ‘3’ for Lowpower Mode to operate properly.
2.
Additional power savings may be realized when the Number Repeaters is set to 1.
3.
To communicate to an RS232 port of a transceiver that is in Lowpower Mode, the RTS line must
be held high to wake it up. The transceiver will wake up within approximately 20 milliseconds of
when RTS goes high.
4.
If the RTS line on the Slave is held high, the transceiver will remain in normal operation
regardless of the Lowpower Mode setting. Once RTS is dropped the transceiver reverts to the
Lowpower Mode.
5.
If the transceiver has the DTRConnect option set to 1 or 2 and if the Lowpower Mode enabled
(set to 1-31), the RTS line on the transceiver must be asserted for the ‘DTRConnect’ feature to
operate properly.
(A)
H
IGH
N
OISE
The High Noise Option is useful in determining if out of band interference is affecting a radio link. A
setting of 1 will provide a reduction of gain in the front end circuit thereby decreasing the affect of any out
of band noise. The results will be seen as a lower signal value and a much lower noise value (as found in
Radio Statistics or Diagnostics). If the noise is not reduced by a greater amount than the signal, the
interference is most likely an in band issue.
When a noise problem is shown to be helped by way of the High Noise option, chances are that the noise
may be further squelched by use of a bandpass filter available for sale from FreeWave Technologies.
(B)
MCU
SPEED
MCU Speed controls the speed of the Micro Controller Unit in the transceiver. The default setting is 0 for
low speed. A setting of 1 is required for Ethernet and UDP operation.
The following table describes the MCU speed settings.
Setting
Description
Notes
0
Low speed
Reduces current consumption
1
High speed
Required for 230 KBaud and greater data port rate
(C)
R
EMOTE
LED
This setting enables the user to connect Remote LED’s through the diagnostics port.
This feature is available in firmware versions 2.64 (900MHz) and 3.64 (2.4GHz) or higher.
Setting
Description
Notes
0
Board LED’s
Default, only on board LED’s are enabled.
1
Board and Remote LED’s
Onboard LED’s are enabled as well as
Remote LED’s through the Diagnostic port.
2 Remote
LED’s
On board LED’s are disabled. Remote LED’s
are enabled through the Diagnostic port.
