2) The Serial Interface
(cont.)
The Signal Level
RS-232C or TTL levels can be used. The signal level for the RS-232C is ± 12v and
the TTL levels are 0 to 5v, with 5v having a logic “1” value. Signals in both levels
cannot be used or connected at the same time.
The Data type
Parity bit
: No parity.
Data length : 8 bits.
Stop bit
: 1 bit.
The Transmission speed
9600, 4800, or 1200 baud can be selected.
3) Other Signal Output
The Signal Line
LD-V4400 Level I & III • Chapter Two
LD-V4400 Level I & III User’s Manual
TP 116
v1.1 • 9/93
2-9
0
1
START
STOP
D0
D1
D2
D3
D4
D5
D6
D7
1 START + 8 DATA + 1 STOP
Figure 2-K
Pin #
Terminal
Input/Output
Level
11
GND
12
CH 2 (Non-DOC*)
OUTPUT
13
AUX 1
OUTPUT
TTL
14
AUX 2
OUTPUT
TTL
15
GND
Figure 2-L
* DOC = “Drop Out Compensated”
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