
5
BLOCK DIAGRAM
Figure 1, below, is a simplified Block Diagram of the Model 713. Be-
cause of the all-digital, minimalist-discrete-component nature of en-
coder circuitry, we have not provided schematic diagrams of the
Model 713 in this Manual. As they say on the back of TV sets:
NO USER-SERVICEABLE COMPONENTS
INSIDE. REFER ALL SERVICING TO
QUALIFIED TECHNICAL PERSONNEL.
Inovonics does, of course, fully support the Model 713, and will pro-
vide detailed service information upon request, including sources for
the few replaceable parts and factory-direct replacements for firm-
ware-proprietary integrated circuits.
Figure 1 -
Block Diagram, Model 713 RDS Encoder
DAC
DIGITAL CONTROL
CPU
RDS SYNTH.
DATA RAM
CODE/DATA ROM
PROGRAMMABLE
EEPROM
19kHz
B P F
PLL
SIDE
LOOP
RDS/MPX
OUTPUT
TIMEBASE
(LOCK)
LPF
RS-232
SERIAL PORT
(FAILSAFE BYPASS)
TA
SWITCH
PILOT/MPX
INPUT
USB PORT
NETWORK
PORT