Tiny SCR Preselector on Winrad  

Controlling your SDR radio and the Tiny SCR preselector at the same time. Tracking feature.

The Tiny SCR Preselector frequency setting and band selection is synchronized dynamically with any radio supported by Winrad v1.6.1 and HDSDR.

When the Start button is pressed on Winrad or HDSDR the Tiny SCR Preselector tracks automatically the band and operating frequency which the supported radio is tuned.

Any variation of the tune frequency on the upper scale and spectrum window on Winrad/HDSDR or supported radio window interface is followed by the Tiny SCR Preselector. Also the Band changes automatically when is needed.

The change of frequency is done in the range of milliseconds so it is unnoticed by the user.

Furthermore the Tiny SCR Preselector tracking software can be recalibrated by the user.

Installation

Download the software of your choice. Winrad v1.6.1 or HDSDR latest Version.

Install the chosen software . Winrad v1.6.1 or HDSDR latest Version.

Install drivers and files of the radio hardware.

Install the Tiny SCR Preselector USB driver.

Files in Tiny_SCR_Preselector_WinRad folder included on CD.

- ExtIO_TinySCR.dll ; interfaces the SCR Preselector with Winrad.

Tiny folder

- Tiny.exe ; SCR Preselector executable program.

- TinySCR.dll ; required by the .exe

- SDRlist.txt ; contains the list of used ExtIO dll’s radios (ExtIO_perseus.dll ; ExtIO_Si570.dll, etc.)

- table_BAND_A.txt to table_BAND_E.txt ; contains the frequency reference tables for each band.

- Copy the ExtIO_TinySCR.dll file and the Tiny folder in WinRad or HDSDR root folder, usually C:\Program Files\Winrad or HDSDR.

Selection of supported radios

To select what supported radio will track the Tiny SCR Preselector open the file named " SDRlist.txt" located on Tiny folder.
From the list of radios place on the first row the selected one.

In the figure the selected radio is SoftRock.

At any time more radio names can be added to the SDRlist.  ( ExtIO_XX.dll file format.)

Playing radios

Open Winrad and go to the menu "ShowOptions" / "Select input" and click " TinySCR ".

or

Open Winrad HD, a menu window will appear, click on "ExIO_ TinySCR.dll "

The interfaces control window will appear on screen, start Winrad/HDSDR; now the user operates normally.

At any time the operator can manually change the frequency and band, of the Tiny SCR Preselector through the control window interface.

Keyboard shortcut "H" brings the graphics user interface to foreground on screen.

Also Windows shortcut "Alt-Tab can be used.

Recalibrating the Tiny SCR Preselector

The Tiny SCR Preselector comes calibrated from factory. Whenever the user can recalibrate it with the aid of the calibration tables for each band.
The Tiny folder contains five documents so-called table_BAND_A.txt, table_BAND_B.txt , table_BAND_C.txt, table_BAND_D.txt and table_BAND_E.txt.

The tables link the operating frequency set on Winrad or HDSDR with the Tiny SCR Preselector tuning capacity value,comprised between 0 and 255. This value can be read on the graphic user interface window.

The column on the left is the capacity value, on the right the frequency related.

With the aid of a frequency reference, values on the table can be modify.

In addition more reference points can be added to the list.

Tune Winrad to the reference frequency and tune the preselector to maximum signal using the control knob on its control window.

Write on the list the capacity value and related frequency.

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