Operation OEM6 Cards and Enclosures
Chapter 4
OEM6 Family Installation and Operation User Manual Rev 12
52
4.1.1
Serial Ports
The receiver communicates with a computer or terminal via a serial port. For communication to occur, both
the receiver and the operator interface have to be configured properly. The receiver’s default port settings are
as follows:
•
9600 bps, no parity, 8 data bits, 1 stop bit, no handshaking, echo off
The data transfer rate determines how fast information is transmitted. Take for example a log whose
message byte count is 96. The default port settings allows 10 bits/byte (8 data bits + 1 stop bit + 1 framing
bit). It therefore takes 960 bits per message. To get 10 messages per second then requires 9600 bps. Also
remember that even if you set the bps to 9600, the actual data transfer rate may be lower and depends on
the number of satellites being tracked, data filters in use, and idle time. It is therefore suggested that you
leave yourself a margin when choosing a data rate.
Use the
SERIALCONFIG
command to change settings as required for all OEM6 family receivers.
The following ports are supported and can be configured using the commands listed. Refer to the commands
listed in the
OEM6 Family Firmware Reference Manual
(OM-20000129) for detailed instructions.
Table 9: Serial Ports Supported
The minimum suggested baud rate for most applications is at least 115200 for GNSS only or
230400 for GNSS+INS. If the buffer overrun flag is present in the RXSTATUS log (refer to the
OEM6 Family Firmware Reference Manual
(OM-20000129)), log at a higher baud rate if
possible, or change to a medium supporting higher bandwidth (USB or Ethernet).
Although the receiver can operate at data transfer rates as low as 300 bps, this is not desirable.
For example, if several data logs are active (that is, a significant amount of information needs to
be transmitted every second) but the bit rate is set too low, data overflows the serial port buffers,
causing an error condition in the receiver status that results in lost data.
Refer to
on page 53 for OEM638.
Refer to
Section 2.5.3, Connecting Data Communications Equipment
on page 38 for additional
default setting details.
Receiver Type
Port Supported
Configuration Command
OEM615
OEM617
OEM617D
COM1, COM2, COM3
SERIALCONFIG
OEM628
COM1, COM2, COM3
SERIALCONFIG
and
SERIALPROTOCOL
OEM638
COM1, COM2, COM3, COM4,
COM5, COM6
(COM1, COM2 and COM6 are
configurable RS-422/RS-232)
SERIALCONFIG
and
SERIALPROTOCOL
FlexPak6
FlexPak6D
COM1, COM2
SERIALCONFIG
and
SERIALPROTOCOL