Sutron Xpert2, Operation And Maintenance Manual

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Err: Flashes when a message is received that has errors. If you see this often, then your serial
cable may be suffering from crosstalk (be wary of very thin serial cables designed to be used for
a mouse), or your PC may not be capable of keeping up with 115.2K baud serial communication.
You could try a slower baud rate (57.6K baud) or a different com port. USB serial ports may
have more problems with higher speeds then legacy ports.
The Status button brings up the Communication Status window:
The Status screen displays information about the current session and allows some testing of the
SSP (Sutron Standard Protocol) connection:
Rx Good: Number of SSP messages received addressed to your PC;
Rx Total: Total messages received. SSP supports multi-drop (most common with LOS radio
systems) where messages can be sent to any station in a network;
Rx Bad: Number of bad SSP messages detected. This would be messages which could not pass a
CRC-16 check.
Tx Good: Number of SSP messages transmitted, and acknowledged.
Tx Total: Number SSP messages attempted.
Tx Bad: Number of times an SSP message could not be sent.
Clear: Sets all the statistics to zero.
Bps: The number of bits received and or transmitted per second (computed using a 2-second
moving average). If screen updates or file transfers seem sluggish it might be because you’re not
achieving a very high (bps). This can be caused for numerous reasons including an
underpowered PC, communication errors, or just that the Xpert is very busy with processing. The
rate achieved will vary depending on what’s being performed. For instance, under even the best
circumstances, a file transfer to the Xpert will be limited by how fast the Flash Disk can be
written.
Key: This keys (powers on) a radio transmitter (asserts DTR and RTS) and can only be used
when XTerm is configured to communicate with a LOS Radio.
UnKey: This unkeys a radio transmitter (drops DTR and RTS) and can only be used when
XTerm is configured to communicate with a LOS Radio.
Check Mail: This checks to see if you’ve received a mail message via SSP. When a mail
message is received you may hear a beep or the RingOut.Wav file played if it’s on your system.