Antenna Tuning Unit
ATU(Antenna Tuning Unit), is Impedance Matching device installed at Outside(near the Antenna) so that transmitter output can radiates better through the antenna.
Meter is placed inside of the ATU to check Antenna current and Reflect power, and also ARC GAP and DRAIN COIL are installed to protect the transmitter from lightning.
For the initial installation, tune the variable condenser and variable coil by checking the value on Meter inside the ATU so that Antenna Current shows its maximum and Reflect power shows its minimum.
|1. INPUT IMPEDANCE||50ohm|
|2. LOAD IMPEDANCE||10 to 200ohm resistance with capacitance|
|3. PRESET CHANNEL||One(1) channel|
|4. FREQUENCY||527KHz to 1606KHz|
|5. POWER INPUT||Up to 50KW|
|6. TUNING TIME||Manual tuning by turn of handle|
|7. POWER REQUIREMENT||+24V.dc|
|8. TEMPERATURE RANGE||-10℃ to +55℃|
|9. HUMIDITY||Less than 95% at +40℃|