Meinberg GEN170TGP - Manual (Page 16)

16
Time code
Principle of Operation
The Board GEN170 has been designed for the generation of IRIG, AFNOR and
IEEE1344 standard time codes. Apart from the digitally generated amplitude-modulated
code, it also provides the unmodulated DC-Level shift code. The modulated sine wave
carrier and the board´s internal time pattern are derived from the radio clock´s disciplined
oscillator.
Block Diagram Time code
mi
c
roc
o
n
tr
ol
le
r
mod
u
la
to
r
EP
L
D
D/
A co
n
v
e
rt
er
dr
iv
e
r
50
u
nba
la
n
c
e
d
d
ig
ita
l
si
n
ew
av
e
ge
ne
ra
to
r
ti
m
ec
o d
e
10
M
H
z
m
o
d
u
la
te
d
ti
m
ec
o
d
e
un
modu
la
te
d
ti
me
c
o
de
s
hi
g
h
- an
d
lo
w-
act
iv
e
PP
S