Operation In Bypass Mode; Changing Frequencies And Antennas - Acom Owner's Manual

User's Manual | ACOM 04AT | Remote Automatic Antenna Tuner and Switch

4.5. Operation in BYPASS Mode

If the operator has chosen BYPASS mode, he takes full responsibility for matching the antennas to the
feedline and amplifier - same as without a tuner in place.
In order to place the tuner in BYPASS mode, the operator should press and hold the TUNE button for at least
1 second. The tuner bypasses the matching network in order to eliminate its action. BYPASS is displayed
onscreen (in front of the frequency).
In BYPASS state, the ANT button is still enabled. The antennas can be switched according to their assignments
in the ANTENNA ASSIGNMENTS menu (see Section
can be used as an automatic antenna switch to select antennas using the antenna assignments by bands or
as a manual switch, if more than one antenna is assigned per band.
The tuner stays in BYPASS state until reactivated by pressing and holding the TUNE button again (1s - Use
ATU). Regardless of whether or not a frequency and/or antenna were changed in the meantime, a new quick
tuning is completed from the tuner memory for the current antenna and frequency in use. If there is no
stored tuning in the tuner memory, the tuner will stay in BYPASS mode until it is tuned.

4.6. Changing Frequencies and Antennas

Changing a frequency segment or band with a respective quick tuning can be performed in three ways:
- Automatically - utilizing transceiver CAT;
- Semi automatically (when no CAT is active) - by a short transmission at the new frequency,
followed by a short pause, during which "quick tuning" will be completed (see Section
).
Non-Volatile Memory
- Manually - by pressing the
by changing the antenna with the ANT button (only if more than one antenna was declared for the operating
frequency (see section
6.1 ANTENNA ASSIGNMENT Menu
The frequency segment (boundaries of validity of the current tuning) is numerically indicated on the basic
screen of the amplifier, above the tuner setting area. If the new frequency is outside the current frequency
segment, a quick tuning will be performed.
If the tuning found in memory is too old, the operator will see the message
Please, see Sections
4.4 Quick Tuning and Non-Volatile Memory
May 2021
6.1 ANTENNA ASSIGNMENT Menu
SEGMENT or SEGMENT
). The last used antenna is memorized.
WARNING: TUNING OUTDATED
and
S e c t i o n STARTING UP AND MAIN FUNCTIONS | Page 39 of 72
). In this mode, the tuner
4.4 Quick Tuning and
button (unless there is an active CAT) or
.
6.2.8 Aging and Refreshing of Settings
.