Table of Contents
Advertisement
CUTS
TIMING,
WRITE
MODE
(1200
Baud
Operation)
13
1
1
GJ
1
1
1
0
0
1
1
UART (NRZ Data)
12
DATA WRITE STROBE
14
f '
)
J1J1JWUl
2400 Hz
1
1
1
1
NRZ DATA (Synchronized to
1200 Hz Clock)
15
16
17
MANCHESTER ENCODED DATA
18
FILTERED MANCHESTER ENCODED DATA
NOTE:
1200 Baud NRZ data (13) is not necessarily synchronized with 1200 Hz
clock.
Signal at 15 and its complement on pin 12 of U3 are.
1
2
3
4
5
6
7
8
9
10
11
19
CUTS
AUDIO IN (0.5 to 8 V p-p)
FILTERED AUDIO
(Approximately 2
V
p-p)
DC level between 0.5 and 5
V
dc depending in input signal
amplitude.
DC level varies inversely with input amplitude.
-."j
I+-
Approximately 500 nsec
----------------~f
'r'---------------------
~
o
V
(Approximately
20
V
p-p)
MANCHESTER ENCODED DATA
(CMOS Level)
to Negative Edge
(Approximately 1200 Hz)
RECOVERED NRZ DATA
Approximately 19,200 Hz
(16X Data Rate)
Average DC Level set by VRI
to Approximately 3.5 V dc
Advertisement
Table of Contents
