Acom ATU04 Automatic Antenna Tuner Matches A1200S, Remote matching of antennas - less losses in the feed line. Designed for installation in a shack, under a shed, or in open (see mounting kit options). Can be distanced up to 100 m (330 feet) from amplifier. Powered and controlled directly from the ACOM solid state HF+6m amplifiers through the amplifier RF output cable only - there is no need for power or control cables between the shack and the tuner. Provides automatic or manual antenna change and automatic antenna impedance matching to the ACOM solid state HF + 6m amplifiers, controlled entirely from the amplifier front panel and your transceiver CAT. Guards the transceiver and amplifier against excessive impedance mismatch during the tuning process. Operates with two types of tunings: full tuning (basic matching cycle) and fast tuning (retrieving user tuning patterns from nonvolatile memory. Full tuning is 100% automated however a cycle is initiated only by the operator. User tunings track the antenna and frequency changes automatically during amplifier and transceiver operation. Four typical antenna types: Regular, Sharp, Wide, and Fixed-frequency are available so the operator can adapt the frequency segment width to the specific antenna bandwidth; BYPASS mode is also available. Antennas appear with a number, type, and user-editable name on the ACOM solid state amplifiers screen. Tunings availability presented by a graphic scale on the ACOM solid state amplifiers screen. A plenty of antenna- and tuner- related information is available on the ACOM solid state amplifier screen: menus ATU SERVICE, ATU MEASURE, ATU TUNINGS LOOKUP/ERASE, Resource-estimate function etc. Tuning “age” warning can be set to warn you when you attempt to use an outdated tuning. The user can archive all tunings from nonvolatile memory in a computer file as well as upload earlier archived files in the ACOM 04AT nonvolatile memory through the ACOM solid state amplifier’s RS232 port. Protections: PS voltage, Reverse PS polarity, Excessive RF voltage, RF current or reflected power at the antenna outputs, Excessive tuning power, Excessive Input power, Hot switching of relays, Overheating etc. Protected against building of static electricity in the antennas via bleeding resistors and against close lightning strikes via gasfilled discharger; unused antennas are directly grounded during operation as well as all antennas are when the ACOM 04AT is powered off.