Long-Range VHF With Network Management

Capturing the 30 to 50 percent wider coverage of the VHF frequency band, the NMS VHF features an original software architecture and operates in the 135 to 174 and 218 to 238 MHz frequency bands.

Featuring built-in SATEL NMS software which provides a powerful graphical tool for designing radio networks, monitoring link quality and site configuration and diagnostics, SATELLINE-3AS(d) VHF modems can be used in NMS or in transparent mode with a power range of either 100 mW – 1 W or 1 W – 5 W.

Cost savings through:

  • Enhanced reliability, through advanced indication of anticipated faults and failures
  • Reduced configuration and maintenance costs with remote configuration
  • Easy to use graphical network development tool
  • A virtual mesh network for polling protocols in licensed long range VHF

Additional features

Graphical network design drag-and-drop routing and step-by-step settings guide users intuitively through initial setup and allow for rapid changes.

Selectivity or Sensitivity as Needed

Capable of communicating even in environments with sporadic 12 dB weaker interference on the exact same frequency, SATELLINE VHF radio modems have adjustable signal threshold to focus only on selected stronger signals enhancing operation in densely populated areas and regions with excessive ambient radio frequency noise.

LED Indicators

There are 5 clearly marked and intuitively colored LEDs that show the current status of the SATELLINE modem. There are indicators for the data modem sending and receiving to the device; radio transmitter and receiver activities; and radio frequency channel status- including if it is in use by an unknown party.

Display & Operator Interface

Crowning SATELLINE advanced technology is the built-in backlit LCD display that provides users with vital diagnostic information about received signal strength, frequency, power supply and data settings at a glance. Durable pushbuttons give instant access to virtually all of the radio settings through easy to read menu selections. SATELLINE “D” display models allow for setting up, using, configuration changes, and testing to all be done without ever using a laptop, PC or any other device.

Transparent Wireless Communication

Eliminating complicated external synchronizing signals by using asynchronous data streams, the entire data stream is transmitted less than 1 millisecond after it is received arriving at the other end intact and without interruption or re-packetizing and allowing for the highest level of transparency to connected devices.

Forward Error Correction

Encapsulating device data packets network wide with self-correcting algorithmic data, FEC, gives SATELLINE radio modems the internal tools to actually eliminate erroneous bits and reconstruct the original data packet when there are slight errors from long distances or heavy interference.

Error Check

When data quality is essential, SATELLINE radio modems come with SATEL’s proprietary Error Check and full CRC16 error checking which can be set to either completely reject any data packet with errors transparently, or pass the packet and checksum intact to a device master.

Test Mode

Cutting down on installation and repair times, SATELLINE radio modems feature short and long block testing to simplify antenna testing and alignment, link, system and path tests. When combined with the benefits of conveniently displayed signal strength on the receiving modem, antenna installation times are reduced to a minimum.

Repeater Functionality

All SATEL radio modems are capable of store-and-forward repeater functions or may be paired together for duplex repeater operation. Repeater functionality allows for virtually endless connection range and network coverage. Message routing and addressing functions can be added to create robust and far-reaching network topologies.

Advanced Addressing Functions

Configurable with dual transmission and receive addressing and network identification, SATELLINE radio modems can remain transparent and universally compatible with devices while still extending networks across longer distances through one or more repeaters or to isolate multiple sub-networks without receiving duplicated or conflicting device data.

Automatic Message Routing

By identifying source and destination addresses for data in many pre-configured or user defined polling data protocols, SATELLINE radio modems automatically direct data packets to their destination by finding the route within the radio network itself transparently to connected devices. Routes are automatically created if a remote location is moved, a repeater station is lost, or in systems with mobile remote devices. The AMR function is configured using SATEL’s free SaTerm PC software. With SaTerm, allows users are able to graphically design a radio modem network, troubleshoot, and make radio modem firmware updates by simply drawing connections between radio modems, while routing information is automatically generated.


Advanced control and diagnostics are available from all SATEL radio modems using SATEL Language (SL) Commands. Experienced users and manufacturers with integrated SATEL solutions can utilize “SL-Command” blocks to interact directly with all SATELLINE radio modems.

Flexible Data Interface

Capable of operating transparently on as little as 3-wire communication (Tx, Rx, & ground) or as much as 25-pin RS-232 with full hardware handshaking; SATELLINE radio modems directly accept most common wiring formats, including RS-232, 485 & 422.

Additional information

Frequency Range

135 – 155, 138 – 160, 155 – 174 & 218 – 238 MHz

Channel Spacing

12.5 kHz / 25 kHz (fixed)

Number of Channels

1760 max

Communication Mode


Carrier Power

100 mW, 500 mW, 1 W, 5 W / 50 ohm

Carrier Power Stability

< ± 1.5 dB

Adjacent Channel Power

according to CFR 47 Part 90 / EN 300 113

Spurious Emission

according to CFR 47 Part 90 / EN 300 113

Receiver Blocking

> – 12 dB

Adjacent Channel Selectivity

> 50 dB @ 12.5 kHz & > 60 dB @ 25 kHz

Intermodulation Attenuation

> 60 dB

Electrical Interface

RS-232, RS-485 or RS-422

Interface Connector

D15, female

Data Interface Speed

1200 – 38400 bps

Packet Throughput

9600 @ 12.5 kHz / 19200 bps @ 25 kHz

Data Format

Asynchronous data

Antenna Connector

TNC, 50 ohm, female

Operating Voltage

+ 8 to + 30 Vdc

Power Consumption

1.7W Rx, 6.6W typical @ 1W Tx, 22W @ 5W Tx

Size (H x W x D)

137 x 67 x 29 mm (137 x 80 x 56 mm with heat sink)


265 g (550 g with heat sink)

Operating Temperature Range

-25 °C to +55 °C (ETSI standards), -40 °C to +75 °C (absolute min/max)

YM5000: SATELLINE-3AS VHF, up to 1W transmit power, no display

YM5010: SATELLINE-3ASd VHF, up to 1W transmit power, with display

YM5020: SATELLINE-3AS VHF C, up to 5W transmit power, no display, with heatsink

YM5030: SATELLINE-3ASd VHF C, up to 5W transmit power, with display, with heatsink

12.5 kHz band products end with “-125”
25 kHz band products end with “-250”


SATELLINE-3AS NMS User Guide v6.0