Specifications - Bell 5902 Hardware Manual

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Specifications

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Modulation
Data Rate
Transmit Carrier
Duplex
Wires
Transmit Level
Receive
Sensitivity
Output
Impedance
Input Impedance
Anti-Streaming
RTS/CTS Delay
CTS Hold Time
Soft Carrier Tone
Transmit Time
Soft Carrier Tone
Detect Delay
Carrier Detect
Delay
Carrier Loss
Delay
Carrier Detect
Level
Radio Frequency
Carrier Detect
Input
Radio Carrier
Input Mode
Radio Transmit
Key Output
5902 Bell 202 Modem Hardware Manual
October 19, 2007
www.controlmicrosystems.com
Bell 202 Frequency Shift Keying (FSK)
Mark = 1200 Hz
Space = 2200 Hz
Soft carrier turn-off = 900 Hz
Frequency accuracy +/– 0.4%
1200 baud
Switched or constant
full or half
half duplex requires DTE to implement hardware RTS/CTS
handshake
two or four
–35 dBm to 0 dBm into 600 ohms
potentiometer adjustable
–30 dBm to +3 dBm
potentiometer adjustable to –40 dBm
600 ohm balanced
transformer isolated
600 ohm balanced
transformer isolated
none, 10Sec, 30Sec, 60Sec
wire: 25ms, 50ms, 125ms, 250ms
radio: 67ms, 133ms, 266ms, 1000ms
1ms, 8ms
none, 13ms, 25ms, 38ms
4ms to 10ms
wire: 19ms, 30ms, 51ms, 92ms
radio: 33ms, 67ms, 133ms, 265ms
6ms, 10ms, 23ms, 39ms
constant carrier reception half duplex
-30 dBm, adjustable from -20 dBm to -40 dBm
optical coupler LED input
5 VDC at 1mA
12 VDC at 3mA
24 VDC at 7mA
use or ignore
optical coupler open collector transistor
5 to 15 VDC
25mA
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