Nautel NV30 - Page 92

NV30/NV40 Operations and Maintenance Manual Operating the transmitter
Page 2-74 Issue 3.3 2014-12-10
• Forward Tap Delay - This field displays the time delay (in unit taps) between the forward
path signal from the exciter and the reverse path signal into the exciter, fed back from the
output of the transmitter. This value is factory adjusted (to synchronize the phase of the for-
ward and reverse signals so that pre-correction can operate properly) and should not require
any adjustment in the field.
• Auto-Find Gain - Press the Start button to automatically find the optimized gain while the
transmitter is RF On and in the applicable preset mode/injection level.
• FM+HD Low Inj Gain - Applicable for FM+HD mode only (at -20dBc to -15.1dBc injection
levels) and represents the starting/default gain applied to the forward path signal within the
exciter at initial turn on/ramp-up.
•FM+HD High Inj Gain - Applicable for FM+HD mode only (at -15dBc to -10dBc injection
level) and represents the starting/default gain applied to the forward path signal within the
exciter at initial turn on/ramp-up.
•HD Gain - Applicable for HD mode only and represents the starting/default gain applied to
the forward path signal within the exciter at initial turn on/ramp-up.
•IBOC Power Calibration - This calibration occurs at the factory and should not require any
adjustment in the field. This calibration is performed in FM mode.
• Calibration Value - This field displays the calibration of the exciter’s measurement of the
transmitter power.
Figure 2.55: System Settings - IBOC Settings