Hemisphere GPS VS101 Quick Reference Manual

Installation Considerations

Proper antenna placement is important to obtain a
high-precision GPS reading. Place the antennas:
• With a clear view of the horizon
• Away from other electronics and antennas
• Along the vessel's centerline
You must install the primary antenna
along the vessel's centerline; you cannot adjust the
position readings if the primary antenna is installed
off the centerline. Positions are computed for the
primary antenna.
• On a level plane
• At 2.0 m maximum separation, default is 0.5 m
• Away from radio frequencies
• As high as possible
For the best results, orient the antennas so the antennas'
connectors face the same direction.
Note: In the VS111 kit, install the A30 antenna as the
primary antenna as it is used for positioning.

Mounting Orientation

Parallel
Orientation
Receiver
(display
must face
primary
antenna)
Perpendicular
Orientation
Receiver
(display must
face primary
antenna)
Forward
motion
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Getting Started

1. Power on the unit.
2. Select Config Wizard > Use Previous to use an
existing configuration or select Config Wizard >
Proceed Wizard to create a new configuration.
3. Select the appropriate differential source and
communication port settings for new configurations.
4. Change defaults to the aiding features, time
constants, and bias only if you are customizing the
mounting installation including:
• Unable to mount the antennas and/or the
receiver on a level plane
• Unable to mount the antennas at a 0º heading or
on a level plane
• Need accurate heading while remaining
stationary for long time periods
5. Enter the antenna separation if the antennas were
not installed 0.5 m apart. The separation distance
must be measured to the nearest centimeter.
6. Enter the desired attitude output (Pitch or Roll).
7. Select Save to Location and then select an
available location.
8. Select Config Wizard > Use Previous to enable
the custom settings.
Forward
motion
Antenna
separation
(0.5 m default,
2.0 m maximum)
Antenna
separation
(0.5 m default,
2.0 m maximum)
VS101 and VS111 GPS Compass
Quick Reference Guide
Part Number: 875-0254-000 Rev A1
Display
Heading
Differential
Signal
Secondary
GPS
Primary
GPS
Power
Note: The power toggle switch and connectors on
located on the back of the unit (not shown).
GPS Status
GPS Signal
Indicator
Each bar represents a distinct satellite and its associated
signal quality: the higher the bar, the better the signal.
Note: If using autonomous or external correction mode,
the DGPS signal indicator will not appear in the display.
Differential signal status has no affect on the heading
output.
Selection
buttons:
Up/
Forward
Enter/
Select
Down/
Back
DGPS or Beacon
Signal Indicator