USER'S GUIDE____________________________________________________________________
34 __________________________________________________________________ M010117EN-H
Check that the RT20Aantenna follows the radiosonde. The antenna
moves stepwise. After each elevation and/or azimuth correction, the
radiosonde should be visible through the optical telescope.
If the antenna tracks but the radiosonde is not visible through the optical
telescope:
- Point the antenna manually to the radiosonde using the direction keys
on the Hand Terminal RHT21. The direction keys are active before
the launch and two minutes after the balloon is released. Automatic
tracking mode is automatically resumed when the direction keys are
released.
- Check if the radiosonde is now visible through the optical telescope. If
not, point the antenna again.
If the antenna does not track, tune the receiver using the hand terminal:
1. Press the AUTO/MANUAL key.
2. Press the ENTER key.
3. Press the TELEM. key.
4. Press the SCAN key.
When the five stars appear on the display:
1. Press the TRACK key.
2. Point the antenna to the radiosonde using the direction keys.
3. Press the AUTO/MANUAL key.
4. Press the ENTER key.
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