Expert Electronics MB1

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MB1 User Manual

MAIN SCREEN DESCRIPTION

Frequency coefficient - Correction menu of the transceiver's frequency tuning.

Set the coefficient that the transceiver's tuning frequency would be equal to the real frequency

of the received signal.

Note:

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Correction of the displayed frequency could be made according to the time signals on the

4.996MHz, 9.996MHz or 14.996MHz (preferably) frequencies, where you can find easily

tracked pulse signals. If they do not match with the tuned frequency, adjust the Frequency

coefficient till the frequency match.

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The higher the frequency of the used time signal, the higher calibration accuracy.

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Calibration should be performed with the maximum panorama zoom and maximum FFT size

of the panorama (more detail about FFT size in Spectrum ).

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After you set the frequency correction coefficient, press the Write button.

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The devices are calibrated at the manufacturing by default, additional calibration is not

required.

Firmware update - Button for manual firmware update in the transceiver's SDR module.

Press the Firmware update button to initialize firmware update process.

Tuner - Button for manual firmware update in the transceiver's ATU module.

Press the Tuner button to initialize firmware update process.

MB1 buttons - Input lines control button.

Press the MB1 buttons button to open the text window for lines control of CW key, PTT

footswitch and PTT microphone button.

DITH - Checkbox to enable the internal noise source in the ADC.

Set the DITH checkbox to enable internal noise source of the receiver's high-speed ADC.

Note:

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After set/unset of the DITH checkbox, press the Write button

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Internal noise source in the ADC gives an additional linearity to the receiver's ADC

functionality. As a rule used for lab measurements for receiver's linearity with other devices.

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While operating in real air, noise source is an actual noise of the air, that's why there is no

need to enable DITH function.

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If DITH is enabled, receiver's own noise is increased.

Expert Electronics MB1 - Page 78