XT09-PKC-U Digi International/Maxstream, XT09-PKC-U Datasheet - Page 29
![no-image](/images/no-image-200.jpg)
XT09-PKC-U
Manufacturer Part Number
XT09-PKC-U
Description
MODEM RF 900MHZ 1W USB
Manufacturer
Digi International/Maxstream
Series
XTend™r
Specifications of XT09-PKC-U
Function
Transceiver, Modem
Modulation Or Protocol
FSK
Frequency
902MHz ~ 928MHz
Applications
General Purpose
Interface
USB
Sensitivity
-110dBm
Power - Output
1W
Data Rate - Maximum
230kbps
Voltage - Supply
7 V ~ 28 V
Package / Case
Module
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
9XTend‐PKG‐U™ USB RF Modem – Product Manual v2.x4x [2007.01.04]
MK (Address Mask) Command
MT (Multi-transmit) Command
MY (Source Address) Command
<Networking & Security> The MK command is
used to set/read the Address Mask of a modem.
All RF data packets contain the Destination
Address of the TX (transmitting) modem. When a
packet is received, the TX modem Destination
Address is logically "ANDed" (bitwise) with the
Address Mask of the RX (receiving) modem. The
resulting value must match the Destination
Address or Address Mask of the RX modem for
the packet to be received and sent out the RX
modem's DO (Data Out) pin. If the "ANDed" value does not match the Destination Address or
Address Mask of the RX modem, the packet is discarded.
Sniffer Mode (when MK = 0): ACK requests are ignored and every RX (receive) frame is sent to
the UART, without regard for repeated frames.
All “0” values are treated as irrelevant values and ignored.
<Networking & Security> The MT command is
used to enabled multiple transmissions of RF data
packets. When Multi-transmit Mode is enabled
(MT > 0), packets do not request an ACK
(acknowledgement) from the receiving RF
modem(s). MT takes precedence over RR, so if
both MT and RR are non-zero, then MT+1 packets
will be sent (with no ACK requests).
When a receiving modem receives a packet with
remaining forced retransmissions, it calculates
the length of the packet and inhibits transmission
for the amount of time required for all retransmissions. Thereafter, a random number of delay
slots are inserted between 0 and RN before transmission is allowed from the receiving modem(s).
This prevents all listening modems from transmitting at once upon conclusion of a multiple trans-
mission event (when RN > 0).
NOTE: The actual number of forced transmissions is the parameter value plus one. For example, if
MT = 1, two transmissions of each packet will be sent.
<Networking & Security> The MY command is
used to set/read the Source Address of the RF
modem.
© 2007 MaxStream, Inc., Confidential & Proprietary ‐ All Rights Reserved
AT Command: ATMK
Binary Command: 0x12 (18 decimal)
Parameter Range: 0 - 0xFFFF
Default Parameter Value: 0xFFFF (65535d)
Number of bytes returned: 2
Related Commands: DT (Destination Address),
HP (Hopping Channel), ID (Modem VID), MY
(Source Address)
AT Command: ATMT
Binary Command: 0x3D (61 decimal)
Parameter Range: 0 - 0xFF
Default Parameter Value:0 (no forced
retransmissions)
Number of bytes returned: 1
Related Commands: Networking (DT, MK, MY,
RN, TT), Serial Interfacing (BR, PK, RB, RO), RF
Interfacing (FS)
AT Command: ATMY
Binary Command: 0x2A (42 decimal)
Parameter Range: 0 - 0xFFFF
Default Parameter Value: 0xFFFF (Disabled -
DT (Destination Address) parameter serves as
both source and destination address.)
Number of bytes returned: 2
Related Commands: DT (Destination Address),
HP (Hopping Channel), ID (Modem VID), MK
(Address Mask)
29