Specifications

1-4 888-2500-001 5/2/2013
WARNING: Disconnect primary power prior to servicing.
DAX-1/DAX-3
Section 1 Introduction
1.3 General Description
The DAX-1/DAX-3 is a state of the art solid state medium wave transmitter with a rated
output power of 1/3kW combining improved digital amplitude modulation technology
with APDM (Advanced PDM). The Direct Digital Drive (3D) system supplies the RF
amplifier with TTL level signals eliminating the need for a high-level drive chain,
splitters, cables and tuned circuits.
Figure 1-2
DAX-1 Simplified Block Diagram
PS
Controller
High
Low
Control and
-12V Supply
+12Vdc
+48Vdc
B+ Sample
Exciter/Controller
PA Control
Interface
PA Control
Interface
MB2 PDM Sample
MB1 PDM Sample
B+
Sample
RF
Sample
Display
Interface
V
AC
CB1
Modulator
& PA
Modulator
& PA
External I/OAudio & IBOC
LVP S
Interface
PS Control
Front Panel
Interface
Carrier In
10 MHz In
Synthesizer Out
Mod Monitor Out
Digital Phase
In
Output
Monitor
External I/O
Mod Mon In
Output
Monitor
Motherboard
Fan
Interfac e
LVPS
Interface
LVPS
Interface
PA Control
Inte rfac e
PDM Sample
Filter
Cap
Filter
Cap
Filter
Cap
Filter
Cap
Filter
Cap
Filter
Cap
Filter
Cap
B+
RF
RF Sample
1000 W
Power Level 4
ON
0
OFF
1
POWER
LOWER
INFOPowerMeter
RAISE
INTERLOCK
FOLDBACKFAULT
REMOTE
DISABLE
MOV
Enerpro
SCR
Controller
LVPS
Interfac
e
PS
Controller
Output
Monitor