XT09-PKT-RA-NA Digi International/Maxstream, XT09-PKT-RA-NA Datasheet - Page 12

• Manufacturer Part Number: XT09-PKT-RA-NA
• Description: MODEM RF 900MHZ RS232/485 INT
• Manufacturer: Digi International/Maxstream
• Series: XTend™r

Specifications of XT09-PKT-RA-NA

• Function: Transceiver, Modem
• Frequency: 900MHz
• Interface: RS-232
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Power - Output: -
• Applications: -
• Sensitivity: -
• Data Rate - Maximum: -
• Modulation Or Protocol: -

3. RF Modem Operation
3.1. Serial Communications
WARNING: When operating at 1 Watt power output, observe a minimum separation distance of 2' (0.6m) between
modems. Transmitting in close proximity of other modems can damage modem front ends.
3.1.1. RS-232 and RS-485/422 Data Flow
3.1.2. Host and RF Modem Settings
The XTend RS-232/485 RF Modem interfaces to a host device through a standard DB-9 connector.
Devices that have a standard DB-9 (RS-232) serial port can connect directly through the pins of
the modem as shown in the figure below.
Figure 3‐01. System Data Flow in an RS‐232 environment
Serial communications between a host and an XTend RF Modem are dependent upon having
matching baud rate, parity, stop bit & number of data bits settings. Failure to enter the modem
into AT Command Mode is most commonly due to baud rate mismatch. Refer to the table below to
ensure host serial port settings match those of the modem.
Table 3‐01. Parameter Values Critical to serial communications between RF Modem and host
Both the RF modem and host (PC) settings can be viewed and adjusted using MaxStream's propri-
etary X-CTU Software. After connecting an RF modem to a PC via their respective serial connec-
tions, use the "Terminal" or "Modem Configuration" tabs to configure RF modem settings. Use the
"PC Settings" tab to configure host settings.
Parameter Setting
Baud (Serial Data Rate)
Number of Data Bits
Parity
Number of Stop Bits
© 2007 MaxStream, Inc.
XTend RF Modem Default Parameter Value
9600 bps
8
None
1
(BR parameter = 3)
(NB parameter = 0)
(NB parameter = 0)
(NB parameter = 0)
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