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If you intend to use the observation files with OPUS you
must use one of these recording intervals:
1, 2, 3, 5, 10, 15 or 30 seconds
Auto Sessioning
The default 'Auto Sessioning' setting is 'NONE.’ Some
applications may benefit from having the receiver
automatically close files after a preset period.
‘Auto Sessioning’ only closes the current file. A new file is
not automatically opened.
Elevation Mask
The default setting for ‘Elevation Mask’ is 0 degrees. All
visible satellites are tracked.
OPUS automatically ignores satellites lower than 10-
degrees.
There is a benefit to having the receiver track satellites for
as long as possible as they rise to 10-degrees. (We don’t
want to start tracking at the exact moment that OPUS
begins to use the satellite.)
The X90-OPUS receiver has a large ground plane antenna
which has been optimized for tracking low elevation
satellites. The internal memory of the receiver is huge.
There probably is no advantage to raising the tracking
elevation for any application and it is recommended that
you keep the tracking angle set to the default 0-value unless
you have a really good reason do change it.
Update Firmware
Updating the firmware in your receiver requires that the
GPS be connected to a COM port on your computer (COM1
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