Data Modem
Product Code : LSK-CE-11322
Data Modem (SKU LSK-CE-11322) is a radio data modem that connects to a transceiver through a 9600 baud RS232 port and sends data using a selective repeat ARQ protocol with QPSK channel modulation, at up to 6000 bps with its in-built compression. It runs on 9–16 V DC and suits data links at remote radio stations and data-communication training. Science Lab Supplies, based in Ambala, India, prepares quotations for the modem for institutes, network operators and distributors.
Specifications
The modem’s protocol, data rates, interfaces, power and size are recorded in the table. In short, it combines selective repeat ARQ with QPSK and 80 baud CHIRP modulation, reaches 1475 bps uncompressed or 6000 bps compressed, draws at most 250 mA at 13.5 V DC and weighs 1.8 kg.
| Specification | Value |
|---|---|
| SKU | LSK-CE-11322 |
| Data mode | Selective repeat ARQ protocol |
| Channel modulation | QPSK |
| CHIRP | 80 baud |
| Link establishment | Proprietary link establishment mode |
| Data compression | In-built |
| Data rate, compressed | Up to 6000 bps |
| Data rate, uncompressed | Up to 1475 bps |
| Transceiver interface | 9600 baud RS232 |
| Command port | TR.29 based AT port |
| Primary power | 13.5 V DC nominal, 250 mA max |
| Operating voltage range | 9–16 V DC |
| Operating temperature | 0°C to 55°C |
| Size (W x D x H) | 210 x 240 x 65 mm, including rear connectors |
| Weight | 1.8 kg |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Data Modem
The modem lets a radio link carry files and messages as well as voice. Its selective repeat ARQ protocol resends only the blocks that arrive corrupted, and in-built compression lifts throughput from 1475 bps to as much as 6000 bps, which suits data from remote stations without wired networks.
- Pairing with data-ready HF equipment: the Radio Mobile Kit and Radio Base Kit carry extra cooling fans for interconnecting a data modem; compatibility with this unit is confirmed on the quotation.
- Diploma and B.Tech electronics and communication: practical study of ARQ error control, QPSK modulation and data compression.
- ITI and TVET telecom modules: RS232 interfacing and AT-port configuration of a modem.
- Sending reports and data files from field offices and remote project sites over a radio network.
Keep the supply within 9–16 V DC and the room within 0–55°C, and allow space behind the unit for its rear connectors.
Standard Scope of Supply
The Data Modem is supplied as a single unit with its RS232 transceiver interface and AT port. Interface cables, a DC power supply and the radio itself can be listed on the same quotation, so the full data link can be ordered at once.
Packing, MOQ and Lead Time
Ask for a quotation on one modem or on one for each station in your network. Science Lab Supplies will state the packing, delivery time and price for that quantity, and the radios and power equipment for each station can be grouped on the same quotation.
Science Lab Supplies holds an Importer-Exporter Code and is able to ship to buyers in South Africa, Qatar, Sri Lanka, Vietnam, Malaysia and Peru. Put your radio model in a message via the contact page, add the modem to the enquiry cart, or see the lab tender page for tendered orders.
Frequently Asked Questions
How fast can the modem transfer data?
It transfers up to 1475 bps without compression and up to 6000 bps with its in-built compression. Actual throughput depends on the data type and on radio channel conditions during the session.
How does it connect to a radio?
It links to the transceiver through a 9600 baud RS232 interface and has a TR.29 based AT port for commands. Share your radio model so the interface can be checked before quoting.
What power supply does it need?
The modem runs on 13.5 V DC nominal and draws up to 250 mA, with an operating range of 9 to 16 V DC, so it can work from a regulated DC supply or a battery system.
Who supplies the Data Modem?
The modem comes through Science Lab Supplies, a supplier located in Ambala, India. Its quotation lists the modems with any radios, cables or power items and confirms how the consignment will be packed.
Related Radio and Power Equipment
These products form the rest of a radio data network, from manpack, mobile and base radios to antenna masts, power storage and technician tools. Each can share a quotation with the modem when a station is planned.
- Radio Manpack Kit — 64-character message calls and channel test calling on HF.
- Base Station Kit — VHF base radio with display, full keypad microphone and desktop tray.
- Mobile Station Kit — VHF mobile radio with voice storage and scanning.
- Battery, Gel-Cell, 12V/115Ah — sealed gel cell with rapid recharge ability.
- 200 Wp Solar Power System, Complete — four panels wired in parallel on an aluminium structure.
- Portable Antenna Aluminium, 12m — collapsible mast weighing 28.4 kg.
- Tool Kit, f. ICT Technicians, 220 VAC Eqpt — antistatic wrist-band, multimeter and SWR meter.
Browse the full Communication Equipment range, the Electrical and Electronics range, or all School Lab Equipments.
Last updated: 22 October 2026
