Product manual

9XTend‐PKG‐R™RS‐232/485RFModem–ProductManualv1.2.4
©2005MaxStream,Inc.ConfidentialandProprietary 12
3. ModemOperation
WARNING: When operating at 1 Watt power output, observe a minimum separation distance of 2’ (0.6 m) between modems.
Transmitting in close proximity of other modems can damage modem front ends.
3.1. Serial Communications
3.1.1. RS-232 and RS-485/422 Data Flow
The XTend-PKG-R RF Modem interfaces to a host device through a standard RS-232 (DB-9)
connector. Devices that have a standard RS-232 serial port can connect directly through the pins
of the XTend RF Modem as shown in the figure below.
Figure3‐01. SystemDataFlowinanRS‐232environment
3.1.2. Host and RF Modem Settings
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. Refer to the table below to
ensure host serial port settings match those of the XTend RF Modem.
Table3‐01. ParametervaluescriticaltoserialcommunicationsbetweentheRFModemandhost
Parameter Setting XTend RF Modem Default Parameter Value
Baud (Serial Data Rate) 9600 bps (BR parameter = 3)
Number of Data Bits 8 (NB parameter = 0)
Parity None (NB parameter = 0)
Number of Stop Bits 1 (NB parameter = 0)
Both the XTend RF Modem and host (PC) settings can be viewed and adjusted using MaxStream’s
proprietary X-CTU Software. Use the “Terminal” or “Modem Configuration” tabs to configure the
RF Modem settings. Use the “PC Settings” tab to configure host settings. Refer to the Advanced
Programming and X-CTU Software sections for more information.