User's Manual

COM: used to select the COM port for communication between

SatViewer and your unit’s GPS receiver. This field is also available on

the GPS page for convenience and changing it in one location will

automatically change it in the other location.

Baud: sets the speed for communications between your unit’s GPS

receiver and SatViewer. The baud rate of your GPS receiver is 9600 by

default. Please note, if you have used another application to change the

baud rate of your GPS receiver to 4800, it will take longer for your GPS

receiver to respond to changes made within SatViewer. During this

period, you may see menu items grayed out while SatViewer is sending

the new settings to your unit’s GPS receiver.

Data Bits: should match the data bit rate set in the device you are

communicating with.

Flow: should match the flow control set in the device you are

communicating with.

Parity: should match the parity set in the device you are communicating

with.

Stop bit: should match the stop bit set in the device you are

communicating with.

NMEA Msg: This section allows you to control which NMEA messages

are output by your unit’s GPS receiver and the rate at which they are

output. The GGA NMEA message is automatically enabled by default

and cannot be disabled. You may change the frequency of output for the

GGA NMEA message, but you may not disable it. Other NMEA

messages listed may be disabled as well as changing the frequency of

output. The ability to change the frequency of output and to disable

certain messages is useful when communicating at a very low baud rate

to prioritize which NMEA messages are sent. Each field allows you to

select a value from one to five (measured in seconds), or to select OFF.

For example, selecting three instructs the receiver to output the

corresponding NMEA message once every three seconds. Selecting OFF

instructs the receiver to never output the corresponding message. This

setting is only applicable when you need to specify your unit’s GPS

receiver to send out very specific NMEA messages at specific times for

your GPS application. Most users will not need to change this as the

default NMEA settings will work for most GPS applications trying to

display common GPS information (e.g. position, velocity, direction).