Optus S2 User Manual page 48

5 ANTENNA ADJUSTMENT
*Optus does not accept responsibility for any damages or
injuries, whether direct or indirect, that the magnetic mount
installation may cause. Optus will not warrant any damages
caused to the antenna in the event that the magnetic mount
comes free during use.
Received Signal Display Modes (All Antennas)
The received signal display on the handset display can be viewed
in two modes:
• RSSI (Received Signal Strength Indication), and
• RSNR (Received Signal to Noise Ratio)
To toggle between the two modes, simply press the FCN button
followed by the MUTE button located on the side of the handset.
The default mode for the Optus MobileSat S2 display is RSSI. The
Optus MobileSat S2 will remember the user's last received
signal display mode on subsequent power ups from the handset.
The RSNR display mode is distinguishable from the RSSI display
mode by a small 'sr' character located to the right of the
numerical received signal display.
Both use a scale of 1-20 where the higher value represents
better operation.
84
5 ANTENNA ADJUSTMENT
MANUALLY ADJUSTED MAST ANTENNA
In the case of the Manually Adjusted Mast antenna, the handset
FCN 91 will not adjust the antenna elevation. Rotating the
adjustment knob on the top of the antenna sets the elevation
angle of the antenna. It would have been correctly adjusted for
your location during its installation, however if the signal
strength has dropped noticeably, perform the following
procedure to adjust the antenna.
Figure 9 – Mast Adjustment Knob
1. Ensure that the antenna is vertical.
2. From the map on Page 81, determine the elevation setting
for your current geographic location.
3. Rotate the adjustment knob (milled edge wheel at the top
of the antenna) until the indicator in the adjustment window
aligns with the elevation marker from the map
(eg: Broome = 43 degrees).
4. Read the handset display to determine your signal
strength.
5. Adjust the knob by an eighth of a turn in elevation to
determine your maximum received signal setting. The
signal strength may remain at a maximum for several
adjustments of elevation.
6. Increase the elevation setting of the antenna until the RSSI
numeric value drops 1 or 2 below the maximum.
7. At this setting, calls should be attempted in both directions.
85