F
LOW
default
valid range
S
ERDLY
Sets the serial flow control between the host and RPM3.
Using no flow control enables the RPM3 to be used with a 3 wire serial link (TXD, RXD,
GND). Care must be taken in order to prevent overflowing the 96 byte serial receive
buffer in the RPM3.
Using hardware flow control enables the RPM3 to control the flow of serial data being
received.
none
hw, none
Sets the serial data receive to packet transmit delay.
When the RPM3 receives the first byte of data from the host, it starts a timer running.
Either a full buffer of data to send or a timeout of this timer will allow the packet to be
transmitted.
Fine tuning this delay for the baud rate the RPM3 is operating at can significantly
increase throughput while reducing unnecessary transmissions.
2 (x10ms)
2 to 255 (x10ms)
Sets the action of the W
AKE
input.
Setting shutdown to
O
N
will cause the RPM3 to monitor the
WAKE
input. When
WAKE
is
taken high the RPM3 will be forced into low power sleep mode, thus reducing current
consumption. Subsequently lowering the
WAKE
input will bring the RPM3 out of low
power sleep mode.
SHDN should be set to
OFF
or WAKE pin should be pulled Low when the host (DTE)
cannot provide DTR control signal to wake RPM3 in a 3-wire serial interface.
On
on, off
Sets the number of data retry attempts.
RF interference can cause a transmitted data packet to be lost or corrupt on reception. If
this happens the RPM3 will retransmit any unacknowledged transfer. The transmission
will be retried the specified number of times before the link to the remote unit is
considered ‘lost’ and the data purged.
5
1 to 63
Enables the startup message.
The startup message is enabled by default, thus giving an immediate indication of the
operation of the RPM3. The message can be disabled prior to deployment of the RPM3
module.
On
on, off
Enables transfer acknowledgements.
This function enables packet transfer acknowledgements to be returned for every
outgoing packet. Packet acknowledgements aid in the delivery of error free and
consistent data transfers between a pair of modems. Disabling the acknowledgements
results in higher data throughput between modems, but does not protect against lost data
due to RF interference. It should be disabled while using RPM3 in a broadcast mode.
On
on, off
Enables remote configuration.
Over-air remote configuration of a RPM3 module is possible once it has been enabled.
The remote command is used to send remote configuration commands. See the following
chapter for a overview of remotely configuring a RPM3 module.
On
on, off
Starts the radar test.
Used as a range or confidence test between RPM3 modules within the same
site.
Unit number between 0 and 15.
UHF FM Radio Packet Modem
page 8
default
valid range
S
HDN
default
valid range
R
ETRY
default
valid range
S
TRTMSG
default
valid range
A
CKMODE
default
valid range
R
EMOTE
default
valid range
R
ADAR
parameter
Radiometrix Ltd.
RADIOMETRIX [ RADIOMETRIX LTD ]
