User's Manual

Innovator CHV400BTD ATSC Transmitter System Set Up Procedure
Technical Manual, Rev. 0 69
R8, for a reading of 100% on the External Amplifier Forward Power screen of the LCD
display mounted on the Driver Tray.
Figure 18: (A5) Amplifier Control Board (1309822)
On the ALC Board (1308570), mounted in the Driver Tray, set the Switch S1,
Auto/Manual ALC, to the Auto position. Adjust the ALC adjustment Pot, R75, for a
reading of 100% on the External Amplifier Forward Power screen of the LCD display
mounted on the Driver Tray. This completes the forward power set up and
calibration adjustments.
On the ALC Board (1308570), mounted in the Driver Tray, adjust the ALC
adjustment Pot, R75, for a reading of 10% on the External Amplifier Forward Power
screen of the LCD display mounted on the Driver Tray. Disconnect the load or the
antenna connected to the system. In the Amplifier Tray, on the Amplifier Control
Board (1309822), adjust the Reflected Calibration Adjustment pot, R26, for a reading
of 10% on the External Amplifier Reflected Forward Power screen of the LCD display
mounted on the Driver Tray. Reconnect the load or the antenna to the system.
Adjust the ALC adjustment Pot, R75, for a reading of 100% on the External Amplifier
Forward Power screen of the LCD display mounted on the Driver Tray. This
completes the reflected power calibration adjustment.
6 MHz
-35 dB
-110 dB
3 MHz
6 MHz
Figure 19: Typical 6 MHz Digital Spectrum
R8 FWD CAL ADJ R26 REFL CAL ADJ