Ultraminiature Packet Modem
Technical Overview
The PacComm Ultraminiature Packet Modem (UP) Series are miniaturized packet modems that use surface mount technology to compress full packet modem capabilities into a small (2.5 x 4.75 inch) package.
The UP modems are sold both as assembled units packaged in an industrial metal housing and as board level assemblies for OEM applications. The miniature size is ideal for mounting inside handheld terminals and radios, portable computers, and mobile equipment. The UP models are well suited for solar or battery powered applications.
Features
- Asynchronous serial port which operates at either TTL or RS-232 levels. The UP-24M may be configured to support RS-422, RS-423, and RS-485. Data parameters of 300 to 9600 BPS, 7 or 8 data bits, and all standard parities are supported.
- The digital (radio) port of the UP also supports data rates of 300 to 9600 BPS, however that data rate used must be matched to the modem interfaced with the controller. (19200 BPS is supported on both ports on models with the 10MHz option).
- Low power consumption makes the UP Series an ideal candidate for long term battery or solar powered applications. Power consumption is typically under 30mA.
- 32K Random Access Memory (RAM) for data buffering.
- Data encryption (scrambling) is supported for data integrity. The encryption key is 80 characters in length for enhanced security.
- Optional parallel I/O lines may be used to operate a parallel printer or to read sensor data and control remote devices. Two software controlled switched power outputs.
- Five LEDs for visually monitoring system status: PWR, CON, PTT, DCD and STA.
- The UP-1200 BPS radio interface uses Audio Frequency Shift Keying (AFSK) and the UP-24M uses Minimum Shift Keying (MSK) modulation for both 1200 and 2400 BPS operation. These models operates with any existing voice radio via connection to the microphone and speaker connectors. 4800, 9600, and 19200 BPS Direct Frequency Modulation (DFM) modems are also available. These modems require direct internal attachment to the radios and are primarily intended for integration into units with a dedicated transceiver for use with a commercial data radio.
Firmware
- The UP uses the AX.25 packet protocol to provide error free data communication via a radio circuit. Each unit is assigned a unique identification, making it possible to form a network of stations on a single radio frequency. Error checking protocols allow rejection and replacement of corrupted data. The UP units may be operated in a multiple access mode which allows any unit to initiate data transfer, in a polled mode which requires a central host unit to initiate data transfer.
- The PacComm firmware operating parameters may be set from the serial port or via commands delivered over the radio port. The firmware allows setting and reading the value of each parallel port bit. The firmware also allows the parallel port to operate as a "Centronics" style printer port.
Packaging
- The UP is housed in an extruded aluminum case measuring 1.0 x 2.5 x 4.75 inches. (The case size does not include external connectors. The case length is 5.6 inches with the parallel port option installed). The case is anodized for corrosion resistance and durability.
- Connections to the data device are via a 9 Pin Female EIA Connector (DE-9-S). Power and radio connections are via a six pin Molex locking connector. The optional parallel port connector is a DB-25-S located on the case end.
Ordering Information
For current pricing, click on the product name.
UP-PAD
UP without a modem.
Note: The UP-2400 is recommended ONLY for addition to existing 2400 BPS AFSK systems. New systems should use the UP-24M which utilizes Minimum Shift Keying. MSK modulation offers more "robust" data transmission, and compatibility with a wider variety of radios.
UP-19200
UP with 19200 BPS DFM Modem
Call about custom manufacturing or integration of these products into radio transceivers and portable/mobile data terminals.
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Last updated: 7/19/2004