MB1 Transceiver

      High-end SDR amateur radio



Many radio amateurs use PC with the classical transceiver. In one case it is a notebook, in other – desktop computer. A connection between those two devices every user solves according to its own preference. Somebody connects additional USB interfaces, somebody solders the wire harness. So when you want to go to the contest with the tuned working station, moving the equipment becomes “the pain in the neck”. In this case, you dream about having all that in one box and MB1 becomes a perfect solution for that.

The MB1 transceiver - is a new trend in amateur radio, a transceiver and a computer in a single package. It combines a classic design, developed over several decades, with the most advanced DUC/DDC SDR-technologies - Direct Digital Conversion (DDC) and Digital Up Conversion (DUC), plus a fully-featured high-end personal computer with an Intel Core i5 processor on board. The workstation is switched on with one button

  • Two independent receive channels with a bandwidth of 312 kHz

  • Broadband overview of up to 80 MHz
  • High-quality IPS 7" touchscreen display with a resolution of 1280x800 pixels
  • ExpertSDR2 software in two versions: for Desktop and for integrated GUI display
  • Opportunity to install any other software (applicable for Windows 10 OS) by the User
  • Record and play on air fragments (IQ files) with a bandwidth of up to 312 kHz

Features of the transceiver

  • An Independent receive path with Digital Direct Conversion (DDC)

  • A Separate independent transmission path, constructed on the basis of Digital Up Conversion (DUC)

  • Full duplex or half duplex modes*
  • Two independent receivers with panorama's bandwidths up to 312 kHz plus two sub-receivers

  • 4 HF antenna connectors and 2 VHF
  • Four separate programmable PTT outputs for external power amplifiers
  • The ability to connect to VHF transverters
  • The ability to use the transceiver as a frequency measuring receiver
  • The ability to use the transceiver as a signal generator (DAC OUT)
  • Minor delay in CW mode (about 10 ms)
  • Ability to use the transceiver in SO2R mode
  • Remote control mode

* Full-duplex mode is supported by the transceiver's hardware, but is not implemented in the firmware and software yet. This mode will be implemented in future versions of ExpertSDR2 software


PC capabilities of your transceiver

  • Installation of digital modes software

  • Installation of HAM and Contest logs
  • Two CW Skimmers may be used on different bands
  • The transceiver can connect to the LAN and the Internet
  • Use of Internet applications (e.g. e-mail, Skype, ICQ, TV, etc.)
  • Play video and audio files
  • Watch TV via USB-receivers
  • Ability to connect two external monitors, keyboard, mouse

Internal PC's parameters 

  • Motherboard 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
  • COM-port

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

MB1 2


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 improvement of receiving quality and higher the stability of the software.

MB1 supplied accessories

The transceiver may have an additional option: Automatic Tuner Unit (ATU) for impedance matching antennas with 50 Ohm output path of the transceiver.

Basic configuration:

  • MB1 transceiver

Note: ATU is not installed in the transceiver in the Basic configuration

  • PTT-microphone MD15

  • Power Supply Cable to connect the transceiver to an AC mains network
  • Backup fuse 5A

Maximum configuration:

  • MB1 transceiver+ATU

Note: ATU is installed in the transceiver in Maximum configuration

  • PTT-microphone MD15
  • Power Supply Cable to connect the transceiver to an AC mains network
  • Backup fuse 5A

Additional equipment:

Additionally, you can purchase following devices:

  • Computer Headset with electret microphone
  • PTT footswitch
  • E-Coder panel or E-Coder mini kit for convenient remote work


Characteristic Value
Design concept of the receive path Direct Digital Conversion
RF ADC clock frequency, MHz 160
RF ADC resolution, bit 16
RX frequency range, MHz 0.09 ... 65; 95 ... 148
The maximum width of the spectrum display, MHz 80
Amount of independent RX channels 2
Blocking Dynamic Range (BDR), dB 129...130
Dynamic Range over IMD3, dB 98
MDS level, dBm -124
Image channel rejection, dB > 110
Local oscillator stability, ppm +/- 0.5
Built-in preamplifier, dB -20, -10, 0, +10
Additional VHF preamplifier, dB +22
The method of signal generation Digital Up Conversion
RF DAC clock frequency, MHz 640
RF DAC resolution, bit 14
The range of transmission frequencies, m 160, 80, 40, 30, 20, 17, 15, 12, 10, 6, 2
Maximum output power in HF, W 100
Maximum output power in VHF, W 50
Other characteristics  
Dimensions, mm 320x140x250
Weight, kg 10
Operating Temperature, degrees Celsius 0...+50
Power voltage range, V, Hz ~100 ... 240, 50 ... 60
Maximum consumption power, W 320












pdf MB1 User Manual

This document thoroughly describes MB1 functionality and characteristics. 27-02-17

pdf ExpertSDR2 and CW Skimmer

This guide describes how to setup ExpertSDR2 and CW Skimmer(s).

Public Contract Offers (out of date) 

Out of date Public Contract Offers


"Warning!" Before the installation of the latest version of the ExpertSDR2, please uninstall the previous version completely with "Programs Add/Delete".


installer ExpertSDR2 v.1.2.0 alpha 5
Firmware v. 41.8 dd: 02-11-2016
pdf ExpertSDR2 1.2 alpha_Release_Notes
pdf ExpertSDR2 1.2 alpha_2_Release_Notes 
pdf ExpertSDR2 1.2 alpha_3_Release_Notes
pdf ExpertSDR2 1.2 alpha_4_Release_Notes 
pdf ExpertSDR2 1.2 alpha_5_Release_Notes 

installer ExpertSDR2 1.1.3
Firmware v. 41.8 dd:26.10.2016

installer MB1 Utility 1.1.2