FLOW
Sets the serial flow control between the host and RPM1.
Using no flow control enables the RPM1 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 RPM1.
Using hardware flow control enables the RPM1 to control the flow of serial data being
received.
none
default
valid range
hw, none
S
ERDLY
Sets the serial data receive to packet transmit delay.
When the RPM1 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 RPM1 is operating at can significantly
increase throughput while reducing unnecessary transmissions.
2 (x10ms)
default
valid range
2 to 255 (x10ms)
S
HDN
Sets the action of the WAKE input.
Setting shutdown to ON will cause the RPM1 to monitor the WAKE input. When WAKE
is taken high the RPM1 will be forced into low power sleep mode, thus reducing
current consumption. Subsequently lowering the WAKE input will bring the RPM1 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 RPM1 in a 3-wire serial interface.
Do not set it to OFF for RPM1 Issue 2.
default
On
valid range
on, off
RETRY
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 RPM1 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
default
valid range
1 to 63
S
TRTMSG
Enables the startup message.
The startup message is enabled by default, thus giving an immediate indication of the
operation of the RPM1. The message can be disabled prior to deployment of the RPM1
module.
On
default
valid range
on, off
A
CKMODE
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 RPM1 in a broadcast
mode. Do not set it to ON for RPM1T and RPM1R as they cannot establish connection.
On
default
valid range
on, off
REMOTE
Enables remote configuration.
Over-air remote configuration of a RPM1 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 RPM1 module.
default
Off
valid range
on, off
RADAR
Starts the radar test.
Used as a range or confidence test between RPM1 modules within the same site.
Unit number between 0 and 15.
parameter
Radiometrix Ltd.
VHF Narrow Band FM Radio Packet Modem
page 8
RADIOMETRIX [ RADIOMETRIX LTD ]
