XTH9-MI-128 Digi International/Maxstream, XTH9-MI-128 Datasheet - Page 30

• Manufacturer Part Number: XTH9-MI-128
• Description: MODULE RF 900MHZ 1W 115K W/MMCX
• Manufacturer: Digi International/Maxstream

Specifications of XTH9-MI-128

• Frequency: 900MHz
• Data Rate - Maximum: 230kbps
• Modulation Or Protocol: FHSS, FSK
• Power - Output: 30dBm
• Sensitivity: -110dBm
• Voltage - Supply: 3.3V, 5V
• Current - Receiving: 80mA
• Current - Transmitting: 260mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: MMCX
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -

XTend™ RF Module ‐ Product Manual v2.x6x
MT (Multi-transmit) Command
MY (Source Address) Command
NB (Parity) Command
packet to be received and sent out the RX module's DO (Data Out) pin. If the "ANDed" value does
not match the Destination Address or Address Mask of the RX module, 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.
Refer to the ‘Addressing’ section [p43] for more information.
<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 mod-
ule(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 module 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 module(s).
This prevents all listening modules 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.
Refer to the ‘Multi-transmit Mode’ section [p46] for more information.
<Networking & Security> The MY command is
used to set/read the Source Address of the RF
module.
Refer to the DT command and the 'Addressing'
section [p45] for more information.
<Serial Interfacing> The NB command is used to
select/read the parity settings of the RF module
for UART communications.
© 2010 Digi Internatonal, Inc.
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)
AT Command: ATNB
Binary Command: 0x23 (35 decimal)
Parameter Range: 0 - 4
Default Parameter Value: 0
Number of bytes returned: 1
Parameter
0
1
2
3
4
8-bit (no parity or
7-bit (any parity)
Configuration
8-bit space
8-bit mark
8-bit even
8-bit odd
30