SW2 MAIN FUNCTIONS FOR RECEIVING MODE

DISPLAY WINDOW FUNCTIONS

When right-click is performed on the “Display Window” the software displays a pop-up menu that contains advanced options.

FILTER SPECTRUM: allows the user to select which information is displayed on the spectrum area.

CLICK OPTIONS: allows the user to select which kind of operation can be done when left-click is performed on the Spectrum area.

GRAPHICS SETTINGS: allow the user to open the Display Settings to configure the parameters of the Spectrum/Waterfall graphics displayed in the “Display Window”. Moreover the “Color Settings” option allows to change the colors used in the display window.

LAYOUT: allows the user to select the visualization mode.

SET/RESET REFERENCE: when “Set Reference” is selected, the software displays as a reference curve the input spectrum available at the moment of the selection. “Reset Reference” disables the visualization of the reference curve.

MAX HOLD: when “Max Hold” is selected, the software displays the max hold of the input spectrum together with the real-time input spectrum trace. Click “Max Hold Reset” to reset the max hold trace.

FREQUENCY CALIBRATION: this option allows the user to modify the factory sampling frequency offset of the Elad FDM-Sx Receiver family. Normally this operation is not needed.

As described in the pop-up above, a reference signal at the same frequency of the L.O., has to be provided at the antenna input of the receiver to perform the frequency calibration. Then, place the marker on the reference (peak), press “SET OFFSET" and then “EXIT".
Clicking on button “RESET OFFSET", the software resets the sampling frequency offset to zero.
NOTE: This operation will cause the loss of the factory calibration. Perform this operation only if you are sure to accomplish.

SAVE TO MEM FILE: when “Save To Mem File” is clicked, the “Add to Memory File” Form is displayed.


This form allow to add a new station in station memory file. The user can select the memory file and save the frequency, name and a default demodulation mode for the station.

ADD LOG: When “Add Log” is clicked the “New Log” form is displayed.

This form allow the user to add a new contact in the current logbook.

MARKER 1 ON SCREEN / MARKER 2 ON SCREEN: this option enables the visualization of the markers on the Spectrum. The frequency and amplitude value (dBm) of the Marker 1 frequency is displayed on top-right corner of the “Display Window”. The Marker 2 includes the “Delta Marker” feature to display the frequency and the amplitude difference between the markers.

SHOW MARKER ADVANCED MEASUREMENT: if this option is selected, signal to noise (SNR) measurement are performed and displayed.

RECEIVER COMMANDS PANEL

ANTI-ALIASING FILTER: filter used before a signal sampler to restrict the bandwidth of a signal, in order to make this signal close to the Nyquist limit. This function is only for FDM-S1 (30 MHz Low Pass) and FDM-DUO (54 MHz Low Pass);

ATTENUATOR: it reduce the level of the signal. It could protect the receiver by too high signals.(12 dB for FDM-S2 and FDM-DUO).

NOISE BLANKER: is a device that detects annoying pulses and reduce or delete them.

NOTCH FILTERS: there are 2 notch filters and it is possible to set their parameters (frequency and bandwidth);

VIRTUAL RECEIVERS: there are 4 virtual receivers (RX1 … RX4) available for each channel.

DEMODULATION MODE: select the demodulation mode (CW, CW SH+, CW SH-, USB, LSB, DSB, AM, SAM,
FM, WB FM Stereo, DRM is available only for RX1 of Channel 1);

AGC (AUTOMATIC GAIN CONTROLL): it changes the power of the receiving signal in order to mantain acustic power as constant as possible. When “AGC OFF” is selected, the user could adjust the AGC Gain manually;

NOISE REDUCTION: it is possible to switch On/Off the “Noise Reducer” and modify its speed for the selected RX;

AUTO NOTCH: it automatically locates and attempts any single interfering tone within the receive pass band. It is also possible modify its speed for the selected RX.

Functions for each virtual receiver:

VOLUME 1: main audio input
VOLUME 2: auxiliary audio input
SQUELCH: it is a function that acts to suppress the audio output of a receiver in the absence of a sufficiently strong input signal. It is possible to check it and change its level.
LEFT/RIGHT CHANNEL: send the output to the left/right or both channels of main and auxiliary audio output

DEMODULATION MODES

CW/CWSH+/CWSH-/CWNW MODES

If a CW demodulation mode is selected it is possible to activate a digital resonator filter. With the “D-RES" button the filter is activated and with the slide bar under the button it is possible to adjust the filter bandwidth.

SYNC AM MODE

If the SYNC AM mode is selected it is possible to set some parameters to improve the signal locking:
• If the “W"  button is clicked the initial locking filter bandwidth is set to the “Filter BW” value, when a signal is locked, the locking filter bandwidth is set to the “Lock BW “ value;
• If the “N" button is clicked the locking filter bandwidth is set to the “Lock BW value”;
• With the “F", “M" and “S" buttons it possible to set a Fast/Medium/Slow locking speed;
• With the “Lock BW” slide it is possible to adjust the locking filter bandwidth.

ECSS MODE

If the ECSS mode is selected it is possible to select the upper side / lower side band and to set some parameters to improve the signal locking:
• If the “W" button is clicked the initial locking filter bandwidth is set to the “Filter BW” value, when a signal is locked, the locking filter bandwidth is set to the “Lock BW “ value;
• If the “N" button is clicked the locking filter bandwidth is set to the “Lock BW value”;
• With the “F", “M" and “S" buttons it possible to set a Fast/Medium/Slow locking speed;
• With the “Lock BW” slide it is possible to adjust the locking filter bandwidth.

DRM MODE

If the DRM mode is selected two buttons allows to show the DRM info window and the DRM schedule window.

Clicking on “INFO" the DRM info window is displayed. This form displays some information about the DRM transmission.

Clicking on “SCHEDULE" button, if an internet connection is available, the software automatically downloads and displays the last DRM schedule.

WBFM MODE

If the WBFM mode is selected it is possible to display some RDS decoding information and, by using the “MONO" button, force a mono decoding mode.
Click on “RDS" button to open the RDS Window.

TUNING COMMANDS PANEL

The main function of this panel is to display the tuning frequency. Double click on the frequency display or press space bar to open the “Advanced Tuning” panel.

In the “Digit by digit” section it is possible to modify the tuning frequency or the local oscillator frequency by moving the mouse over each digit and then scroll with the mouse wheel to increase or decrease the digit value. Alternatively the user can click on the small arrow button over and below each digit.
In the “Manual input” section it is possible to modify the tuning frequency or the local oscillator frequency inserting manually the desired value using the PC keyboard (Note: “+” key allow to insert “000”).
If the “LOCK TO CF” button is selected, the tuning frequency corresponds to the center frequency of the Spectrum (that is the L.O. frequency), otherwise it’s possible to select different demodulation frequencies by clicking on the desired point on the Spectrum/Waterfall or using the mouse scroll wheel over the Spectrum/Waterfall area.
If the “LOCK ABS” button is selected, the tuning frequency remains constant even if the local oscillator frequency is changed (until the tuning frequency falls within the selected frequency span; otherwise the tuning frequency will be set according to the frequency span limits).
If the “LOCK” button is selected, all the settings except the volume controls are disabled.
Clicking on “CF" button the software forces the L.O. frequency to be equal to the current demodulation frequency.
Use the “SNAP” button to enable/disable the rounding of the tuning frequency at multiples of the frequency step.
Use the “IF” button to open the IF spectrum window. Left click on this button to open/close the IF window. If the IF window is open, right click on this button to move to foreground the IF window.
Use the “AF” button to open the AF spectrum window. Left click on this button to open/close the AF window. If the AF window is open, right click on this button to move to foreground the AF window.
Use the “CH2” button to open the Channel 2 window. Left click on this button to open/close the AF window. If the Channel 2 window is open, right click on this button to move to foreground the Channel 2 window.
Note: this feature is available only if the connected sampler is a FDM-S2 or a FDM-DUO and the selected hardware configuration supports two channels.

Buttons implement “zoom in”, “zoom out” and “zoom reset” respectively. Use the arrows that appear on the “Display Window” when zoom function is active to move left/right the
visualization.
Moreover, the “Tuning Commands Panel” shows the label “TMATE" when a Tmate is connected and the label “CAT" when the CAT protocol is enabled.

PRESET BOTTON PANEL

Use this buttons to quickly recall a preset containing the local oscillator frequency, RX1 tuning frequency, mode and bandwidth. By default the commons radio amateur and broadcast bands are assigned to this buttons. However the user can modify every settings in the setup window.
Note: if the main window size is set to the default size, this panel is not visible. Use the resize corner to increase the windows height and make visible the preset buttons panel.

STATION MEMORY PANEL

In this panel each station memory frequency name and mode are displayed. Clicking on a line of the table implies that the receiver is tuned at the selected frequency and the mode is set at the value saved in the file.
Note: if the main window size is set to the default size, this panel is not visible. Use the resize corner to increase the windows height and make visible the preset buttons panel.

MAIN SETTING BUTTON

Switches on/off the demodulation

Switches on/off the demodulation

Opens the “Station List” form

Opens the “Station List” form

Opens the FDM-SW2 Logbook management window

Opens the FDM-SW2 Logbook management window

Opens the Windows dialog box to allows the user to select the file to play

Opens the Windows dialog box to allows the user to select the file to play

Opens the “Setup” form

Opens the “Setup” form

SET UP FUNCTIONS

“SET" botton contains several form: “Tuning Step” tab, “External HW” tab, “Tuning” tab, “Audio” tab, “Graphics” tab, “Demod Settings” tab, “Advanced” tab, “TMate/TMate2” tab, “Station Memory” tab, “Recording” tab, “Server”, “About” tab.

To know something more please visit: setup-form.pdf

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