Expert Electronics MB1 - SDR Transceiver including ATU

Expert Electronics MB1 - SDR Transceiver including ATU
Part Number: EX-MB1+ATU
RRP: £ 6239.94
£5599.95 ( £4666.63 EXC. VAT )
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Product Information
  • Overview
  • Specifications
ATU option now standard - you cannot buy these without ATU now as it is included as standard. 

User manual ammendments - download here. 

Many radio amateurs use PC with the classical transceiver. In one case it is notebook, in other – desktop computer. Connection between those two devices is done in accordance with the User's preference. Somebody connects additional USB interfaces, somebody solder the wire harness. When there appear a question to go to contest station with the tuned working station, moving of the equipment becomes “the pain in the neck”. In such a case it is desirable to have everything in one box. SDR transceiver MB1 solves this problem by 100%.

The DUC/DDC transceiver MB1 - this is a new generation of amateur radio. Transceiver combines a classic design, accumulated many decades, with the most advanced DUC/DDC SDR-technologies - direct conversion and synthesis of radio signals, and full-featured modern computer with a CPU Intel Core i5. Operator receives a fully functional workstation in one case, which is started by pressing just a one button. All the connections can be done with a help of virtual audio cables and COM-ports, connecting the second monitor, mouse, keyboard and also to control the enjoyable radio by knobs and buttons on the transceiver's face panel.


  • Uses ADC with sample rate 160 MHz and resolution 16 bit
  • Two independent receive channels with bandwidth 312 kHz
  • Record air stations with the bandwidth up to 312 kHz and an opportunity to reproduce it later
  • Opportunity to receive in Nyquist zones up to 800 MHz (necessary to set additional external filters )
  • Broad band view up to 80 MHz
  • High quality audio DAC with the precision 24 bit fro decreasing signal delays
  • Qualitative IPS 7" display with the resolution 1280x800
  • Connector for controlling external devices, 8 programmable transistor switches
  • Interface with PC – local network 100 Mbps
  • Power voltage 220V, consumption current up to 1.5 A
  • Input of the external reference oscillator with the frequency 10 MHz
  • Small dimensions and respectively light weight
  • ExpertSDR2 software in two variants, for Desktop and for monoblock
  • Opportunity to set any other software by User

Main features

  • Independent receive path with Digital Direct Conversion(DDC)
  • Отдельный независимый передающий тракт, построенный по принципу прямого цифрового синтеза сигналов (DUC)
  • Separate independent transmit path with Digital Up Conversion(DUC)
  • Full duplex or half duplex mode*
  • Работа полным дуплексом или полудуплексом*
  • Two independent receiver channels with bandwidth up to 312 kHz and two sub-receivers in each channel.
  • Antenna switch for two HF antennas
  • Connector for controlling external devices, 7 powerful switches with open collector
  • Connector for connecting mobile antenna 9310 by Stealth Telecom
  • Automatic Tuner Unit for HF band: Available as option
  • ALC input for connecting external power amplifier
  • Four programmable PTT outputs for independent external PA control
  • COM port for connecting external devices(power amplifiers, rotators, external PC etc.)
  • Opportunity to insert BPF in HF frontend via RX IN and RX OUT connectors
  • Embedded suboctave band pass filters
  • Opportunity to connect VHF transverters
  • Using transceiver as a receiver for measurements
  • Using transceiver as a signal generator (output DAC OUT)
  • Frequency synchronization from 10 MHz reference oscillator
  • Very small delay in CW mode (about 10 msec)
  • Opportunity to use transceiver in SO2R mode
  • Opportunity of remote control. PTT foot switch and CW key are connected to E-Coder SDR-control panel. Headset and E-Coder panel are connected to remote PC.

* Full duplex mode is supported by the transceiver's hardware, but is not done software yet. This mode will be supported in the future releases of the program ExpertSDR2.

MB1 also has a full scale computer on the basis of Intel Core i5 processor, which provides the following opportunities:

  • Install digital communications software
  • Contest loggers and magazines
  • Connecting two CW Skimmers to two independent receiving channels on different bands
  • Opportunity to connect transceiver to LAN or WAN Internet
  • Work with internet browser, internet clusters and other opportunities (e-mail, Skype, ICQ, TV, etc.) connected with Internet
  • Viewing and listening audio and video files
  • Watching TV via USB-TV receivers
  • Opportunity to connect external display, mouse and keyboard
  • And many other opportunities limited only by your fantasy. All that inside one MB1 transceiver

Embedded PC's parameters 

  • Mother board of thin Mini-ITX Form Factor
  • CPU Intel Core i5 3.0GHz
  • RAM 8GB
  • SSD disk drive, 128GB
  • 4 ports USB3.0 on the rear panel and 2 ports USB 2.0 on the front panel of the receiver
  • HDMI and DPORT for connecting external monitors
  • LAN connector 1Gb

Application area 

  • Full-function radio amateur transceiver
  • Mobile contest-station
  • Remote receipt point for the contests and other applications
  • Spectrum analyzer with the bandwidth up to 80MHz
  • Work with the external programs of digital connection types, CW skimmer, etc.

Block scheme



A version of ExpertSDR2 software with adapted GUI for 7" display was specially developed for the MB1 transceiver. At the present time software works in RX/TX mode and supports two independent receiving channels with the bandwidth up to 312 kHz. A DSP library developed by company Expert Electronics allowed to improve receiving quality and higher the stability of the software. Two OS are supported: Windows 8 and Linux Ubuntu.

Transceiver MB1 set

Transceiver can have additional options: Internal Automatic Tuner Unit (ATU) for matching the antennas with 50 Ohm transceivers output impedance, embedded WLAN unit for connecting the transceiver to LAN via wireless interface WLAN.

Basic complete set:

  • MB1 transceiver

Note: Automatic Tuner Unit is not installed into the transceiver

  • LAN-cable for connection to external LAN
  • Power supply cable for connecting the transceiver to AC network
  • Two audio adapters JACK 6.3 mm to JACK 3.5 mm for connecting the headset to the transceiver
  • CD-disc with ExpertSDR2 software. (Software can be also downloaded from our web-site)

Maximum complete set:

  • MB1 transceiver + Internal ATU

Note: Automatic Tuner Unit is installed into the transceiver

  • LAN-cable for connection to external LAN
  • Power supply cable for connecting the transceiver to AC network
  • Two audio adapters JACK 6.3 mm to JACK 3.5 mm for connecting the headset to the transceiver
  • CD-disc with ExpertSDR2 software. (Software can be also downloaded from our web-site)

Recommended accessories:

In addition to main complete set can be purchased the following accessories:

  • Computer headset EE-PH-01 with electret microphone
  • PTT foot switch EE-CP-02
  • SDR-control panel E-Coder EE-EP-01 or SDR-control panel mini kit EE-EP-02, for comfortable remote work
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