Specifications

5/2/2013 888-2500-001 6-23
WARNING: Disconnect primary power prior to servicing.
Section 6 Troubleshooting
DAX-1/DAX-3
6.2.2.6.3 AM2PM Delay Calibration
(J) Manual: Pressing ‘J’ allows the user to adjust the AM/PM (PM Correction) delay
in the Exciter/Controller. This delay compensates for the inherently longer delay in the
audio path with respect to the carrier delay thru the transmitter and allows the phase
correction based on amplitude to re-align with the amplitude at the PA module. Manual
delay adjustment is typically not necessary as the DSP calculates the delay during the
off-line NL and PM Correction training sequence.
(K) Save: Pressing ‘K’ allows the user to save the manual AM2PM delay adjustment
made in (J) above to non-volatile memory.
6.2.2.6.4 PDM Delay Calibration
(N) Manual: Pressing ‘N’ allows the user to adjust the ePDM equalization filter delay
in the Exciter/Controller. This delay selects the digital filter tap used to time-correlate
the reference memory with the RF Sample memory during ePDM equalization filter
estimation. Manual delay adjustment is typically not necessary as the DSP calculates
the delay during the off-line NL and PM Correction training sequence and will hold this
delay constant.
(O) Save: Pressing ‘O’ allows the user to save the manual ePDM delay adjustment
made in (N) above to non-volatile memory.