Product manual
9XTend‐PKG‐R™RS‐232/485RFModem–ProductManualv1.2.4
©2005MaxStream,Inc.ConfidentialandProprietary 28
FS (Forced Synch Time) Command
<RF Interfacing> FS Command only applies to
streaming data. Normally, only the first packet of
a continuous stream has the full RF initializer. The
modems then remain synchronized for subsequent
packets of the stream. This parameter can be
used to periodically force an RF initializer during
such streaming. Any break in UART character reception long enough to drain the DI Buffer (UART
receive buffer) and cause a pause in RF data transmission will also cause an RF initializer to be
inserted on the next transmission.
AT Command: ATFS
Binary Command: 0x3E (62 decimal)
Parameter Range: 0 – 0xFFFF
[x 10 milliseconds]
Default Parameter Value: 0
Number of bytes returned: 2
FT (Flow Control Threshold) Command
AT Command: ATFT
Binary Command: 0x24 (36 decimal)
Parameter Range: 0 – (Receive buffer size
minus 0x11 bytes)
Default Parameter Value: DO Buffer size
minus 0x11 (decimal 17)
Number of bytes returned: 2
<Serial Interfacing> Set/Read the flow control
threshold. When FT bytes have accumulated in
the DI buffer,
is de-asserted or the XOFF
software flow control character is transmitted.
GD (Receive Good Count) Command
<Diagnostics> Set/Read the count of good
received RF packets. Parameter value is reset to 0
after every reset and is not non-volatile (Value
does not persist in the modem’s memory after a
power-up sequence). Once the “Receive Good
Count” reaches its maximum value (up to
0xFFFF), it remains at its maximum count value
until the maximum count value is manually changed or the modem is reset.
AT Command: ATGD
Binary Command: 0x10 (16 decimal)
Parameter Range: 0 – 0xFFFF
Default Parameter Value: 0
Number of bytes returned: 2
Related Commands: ER (Receive Error Count)
The GD parameter is not reset by pin, serial port or cyclic sleep modes.
HP (Hopping Channel) Command
<Networking & Security> HP Command is used to
set/read the modem’s hopping channel number. A
channel is one of three layers of addressing
available to the XTend Modem.
In order for modems to communicate with each
other, the modems must have the same channel
number since each channel uses a different
hopping sequence. Different channels can be used to prevent modems in one network from
listening to transmissions of another.
AT Command: ATHP
Binary Command: 0x11 (17 decimal)
Parameter Range: 0 – 9
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: ID (Modem VID), DT
(Destination Address), MK (Address Mask)