Introduction to the SINAUT ST7 system
2.4 The SINAUT ST7 modems
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
61
MD2
Transmission path
2-wire, 2 x 2-wire or 4-wire,
twisted pair, without loading coils or with few
coils
Type of modulation
•
Frequency shift keying (FSK)
Transmission speeds
•
1200 bps
•
2400 bps
•
9600 bps (not for telephone company
leased lines)
•
19,200 bps (not for telephone company
leased lines)
Mode
•
With 2-wire or 2 x 2-wire
•
With 4-wire
•
Half duplex
•
Duplex or half duplex
Transmit level can be set to
•
0 dB
•
-6 dB
•
-9 dB (for telephone company leased lines)
•
-15 dB
Receive level
0 to -43 dB
Terminating resistor can be adjusted
•
For 1200 and 2400 bps
•
For 9600 and 19,200 bps
•
For tapping point
•
600 ohms
•
150 ohms
•
> 6 kilohms
Ready to send
•
At 1200 bps
•
At 2400 bps
•
At 9600 and 19,200 bps
•
After 7 ms
•
After 4 ms
•
After 0.5 ms
Lower / upper keying frequency
•
At 1200 bps
•
At 2400 bps
•
At 9600 and 19,200 bps
•
1300 Hz / 2100 Hz
•
2400 Hz / 3300 Hz
•
20,800 Hz / 33,600 Hz
Asynchronous character format
10 or 11 bits
Floating optical relay output
•
Max. connected voltage
•
Max. permitted permanent current
•
Max. R
on
•
60 V AC/DC
•
400 mA
•
3 ohms
Surge withstand capability
U
1.2/50
to DIN VDE 0804
between supply circuit and
•
FSK remote line circuits
•
Optical relay output
•
2.5 kV
•
2.5 kV
Compatible with SINAUT modems
•
MD100
•
MD124
•
At 1200 bps
•
At 1200, 2400 and 19,200 bps
Certifications and approvals
EU approval CE 0682 X