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SA202 A/C Bell 202 Modem
Overview
The SA202 master modem is designed to provide either radio or wire-line communication between a polling master computer and remote telemetry units.
It supports the Bell 202 standard for 1200 baud FSK, bidirectional communication over dedicated simplex channels. Typically powered by 110 VAC, this unit has enough reserve to support most data radios.
Features
- Bell 202 standard FSK
- Front panel status indication of operation in a handsome bone color aluminum enclosure
- Direct connection to data radio or leased line
- Internal switching power supply; external battery connection
- Full RS-232 host serial interface
Options
Special line or radio interfaces. Consult the factory for other options.
Specifications
| Mechanical | |
|---|---|
| Size: | 5-3/4"W x 2.44"H x 8"D |
| Weight: | 66 ounces |
| Enclosure: | Bone color aluminum w/black ends and molding |
| Data interface: | RS-232 DCE, 25 pin type D socket |
| Environmental | |
| Operating temperature: | -31 to +122 deg. F (-35 to +50 deg. C) |
| Relative humidity: | 20 to 90% non-condensing |
| Power requirements | 120 VAC, 60 Hz |
| Modem | |
| Style: | Bell 202 |
| Mark frequency: | 1200 Hz |
| Space frequency: | 2200 Hz |
| Modulation: | Frequency shift key (FSK) |
| Baud rate: | 1200 bits/sec asynchronous half duplex |
| Transmit output power | |
| Mark: | 0 dBm, 0.77 Vrms |
| Space: | 3 dBm, 1.09 Vrms |
| Transmit Lockout | After 11 seconds of continuous transmission |
| Receive sensitivity | -35 to 10 dBm, 13.8 mVrms to 2.5 Vrms |
| Surge protection | Designed to meet or exceed IEEE 472.1974 surge test |
