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User's Manual | ACOM 04AT | Remote Automatic Antenna Tuner and Switch
4.2. Tuner Assignment and Unassignment
Tuner assignment and unassignment is done in the USER PREFERENCES menu of the amplifier.
If the top row of the "Antenna tuner/switch installed NO - YES" menu is not selected (if it is shaded), first
select it with the
ITEM or ITEM
To assign the tuner, use the SELECT button and select YES. To unassign the tuner, use the
and select NO. Leave the menu with the EXIT button.
4.3. Tuning Modes: FULL, QUICK and BYPASS
The tuner can operate in two main modes of tuning: full and quick. In addition, the tuner can be switched to
BYPASS mode, without tuning. This is a non-basic mode, but it can be useful.
- "Full tuning" is the basic cycle for active searching the relays setup for a new frequency and
antenna, see details in Section
- "Quick tuning" passively retrieves information stored in the tuner non-volatile memory of full
tuning settings prepared earlier - see Section
- "BYPASS" mode eliminates the action of the coils and capacitors in the matching network of the
tuner in order to be able to change frequency segments or bands without retuning, e.g. at broad-band or
preset antenna - see Section
used for diagnostics and maintenance of the antenna-feeder path (see Section
the Antenna-feeder Path Status
4.4. Quick Tuning and Non-Volatile Memory
Quick tuning is performed automatically at each change of frequency segment, band and/or antenna. The
tuner checks if there is a stored tuning setting for the desired frequency and antenna in the non-volatile
memory. If there is none, the tuner automatically stays in BYPASS mode and the amplifier displays the
warning message:
If there is a stored setting, the tuner reads the relay combination settings from its nonvolatile memory and
immediately performs it by switching all relays in one step (and if necessary, switches the antenna as well)
without any emission. The amplifier refreshes its indication - the new frequency segment is enclosed in a thin
orange frame on the frequency range, "Memory settings" is displayed in front of the numerical segment
boundaries and the number, type, and name of the antenna in use are updated. At this moment the amplifier
is ready for transmission.
If the tuning found in memory is too old, the alarm message TUNING OUTDATED is displayed (see Section
6.2.8 Aging and Refreshing of Settings
to refresh it, he can immediately start a new full tuning cycle and the data in the non-volatile memory will be
refreshed and the message will disappear.
May 2021
buttons.
5 BASIC FULL TUNING CYCLE
4.4 Quick Tuning and Non-Volatile Memory
4.5 Operation in BYPASS Mode
).
ATU FULL TUNING REQUIRED.
), but the outdated tuning setting can still be used. If the operator wants
S e c t i o n STARTING UP AND MAIN FUNCTIONS | Page 37 of 72
.
. In addition to operation, the BYPASS mode can be
7.4 Troubleshooting - Monitoring
SELECT button
.
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