Specifications

6-14 888-2500-001 5/2/2013
WARNING: Disconnect primary power prior to servicing.
DAX-1/DAX-3
Section 6 Troubleshooting
HOLD will stop the filter adaptation and keep the present equalization filter in effect.
The equalization filter, however, will be lost on an interruption of AC power.
DEFAULT retrieves the saved PDM filter from the selected non-volatile ePDM Default
Table. This filter will be restored upon reapplication of AC power.
BYPASS will disable all ePDM filter correction.
(M) NL Correction: Pressing ‘M’ will allow the user to enable (DEFAULT) or disable
(BYPASS) transmitter non-linear correction. The NL Correction (also referred to as
AM2AM Correction) can only be enabled when the Security Key is installed. The non-
linear characteristics of the transmitter are calculated by the DSP during an off-line
automated training process invoked by using (K) on page 5 of the VT100 (see "6.2.2.5
VT100 - Page 5" on page 6-16).
(N) PM Correction: Pressing ‘N’ will allow the user to enable (DEFAULT) or disable
(BYPASS) transmitter phase modulation correction. The PM Correction (also referred
to as AM2PM Correction) can only be enabled when the Security Key is installed. The
phase modulation characteristics of the transmitter are calculated by the DSP during an
off-line automated training process invoked by using (K) on page 5 of the VT100 (see
"6.2.2.5 VT100 - Page 5" on page 6-16).
(O) 10MHz Reference: Pressing ‘O’ toggles the frequency reference selection between
internal +/- 2 PPM 10MHz oscillator, or an external 10MHz reference oscillator via the
10MHz INPUT connector (BNC) on the External I/O board.
(P) Carrier: Pressing ‘P’ toggles the carrier selection for Analog Mode between
internal synthesizer, or an external Carrier signal via the CARRIER INPUT connector
(BNC) on the External I/O board.
NOTE:
For Digital Mode, an external digital phase signal via the DIGITAL PHASE
INPUT connector (BNC) on the External I/O must be used.
(Q) Toggle PDM default table: Pressing ‘Q’ steps to the next table of the ePDM filter
default tables. 4 tables can be stored and are used when the ePDM Correction is set to
the DEFAULT mode.
(R) Save Default Filter to Index: When the ePDM Correction is in ADAPT mode,
pressing ‘R’ will store the present ePDM equalization filter to the Default Filter table
whose index is set by (Q) above.
(S) Analog Audio Coupling: Pressing ‘S’ will toggle between AC and DC coupling of
the input analog audio signal. In Analog mode set to AC coupling for normal operation.
(T) Digital Audio Coupling: Pressing ‘T’ will toggle between AC and DC coupling of
the input DIGITAL AM MAG signal. For IBOC Digital mode set to AC coupling for
normal operation.