Specifications

5/2/13 888-2500-001 2-29
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
DAX-1/DAX-3
The following table lists pertinent jumpers and potentiometers, and provides their
corresponding designator value and function within each board in the DAXtransmitter.
Table 2-7 DAX Jumpers and Potentiometers Listing
JP/R
(n)
NAME Location FUNCTION
JP1 Select either green or red Front
Panel LED during remote disable
External I/O 1-2 = Green @ remote disable
2-3 = Red @ remote disable
JP2 Ref. 10MHz input impedance select:
50 or 10k Ohms
External I/O Short (in) = 50 Ohms
Open (removed) = 10k Ohms
JP3 RF Carrier input impedance select:
50 or 10k Ohms
External I/O Short (in) = 50 Ohms
Open (removed) = 10k Ohms
JP4 (+) Input impedance select External I/O Short (in) = 600 Ohms
Open (removed) = 20k Ohms
JP5 (-) Input impedance select External I/O Short (in) = 600 Ohms
Open (removed) = 20k Ohms
JP6 IBOC Phase input impedance select:
50 or 10k Ohms
External I/O Short (in) = 50 Ohms
Open (removed) = 10k Ohms
R118
(R107)
AC Low Trip Adjust
(early revision boards)
External I/O AC Low Trip Adjust - Factory
use only
JP1 Back-up 10MHz clock reference
select
Exciter
Controller
1-2 = Clock reference 1
2-3 = Clock reference 2
JP2 Back-up 10MHz clock reference
select
Exciter
Controller
1-2 = Clock reference 1
2-3 = Clock reference 2
R25 RF SAMPLE Exciter
Controller
Sets RF Sample level
(TP10)
R32 PDM ADJ Exciter
Controller
Sets PDM Sample level
(TP13) - Factory use only
R37 IBOC MAG GAIN ADJUST Exciter
Controller
Sets IBOC Mag level for A/D
converter input (TP22) - Adjust
for proper sidebands.
R39 AUDIO GAIN ADJUST Exciter
Controller
Sets analog audio level for A/D
converter input (TP22) - Adjust
for 95% modulation at 10 dBm
audio input.
R43 +VS_DTG Exciter
Controller
Dead Time Generator voltage
adjustment (TP29 - 1V per
100kHz of Carrier) - Factory
use only