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SPM2-433-18 Datasheet(PDF) 8 Page - List of Unclassifed Manufacturers

Part # SPM2-433-18
Description  UHF SpacePort Modem
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Manufacturer  ETC2 [List of Unclassifed Manufacturers]
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SPM2-433-18 Datasheet(HTML) 8 Page - List of Unclassifed Manufacturers

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Radiometrix Ltd, SpacePort Modem
page 8
FLOW
Sets the serial flow control between the host and SPACEPORT.
Using no flow control enables the SPM 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 SPM.
Using hardware flow control enables the SPM to control the flow of
serial data being received.
default
hw
valid range
hw, none
SERDLY
Sets the serial data receive to packet transmit delay.
When the SPM 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 SPM is operating at can
significantly increase throughput while reducing unnecessary
transmissions.
default
2 (x10ms)
valid range
2 to 255 (x10ms)
SHDN
Sets the action of the WAKE input.
Setting shutdown to ON will cause the SPM to monitor the WAKE input.
When WAKE is taken high the SPM will be forced into low power sleep
mode, thus reducing current consumption. Subsequently lowering the
WAKE
input will bring the SPM out of low power sleep mode.
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 SPM 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.
default
5
valid range
1 to 63
STRTMSG
Enables the startup message.
The startup message is enabled by default, thus giving an immediate
indication of the operation of the SPM. The message can be disabled
prior to deployment of the SPM module.
default
On
valid range
on, off
ACKMODE
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 SPM in a
broadcast mode.
default
On
valid range
on, off
REMOTE
Enables remote configuration.
Over-air remote configuration of a SPM 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 SPM module.
default
On
valid range
on, off


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