Wavecom W-SPECTRA (Automatic Monitoring System) V1.1.0 - Manual (Page 48)

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Spectrum Editing Tool (W-SPEED) WAVECOM Monitoring System W-SPECTRA, W-SPEED Manual V1.1.0
File Menu
W-SPEED File menu.
The File menu consists of following functions:
 Load: opens a (wideband) PXGF recording and displays it in a two-dimensional sonagram.
 Split a recording: splits a big PXGF recording into several equal-size consecutive small recordings.
 Convert a recording: converts a WAV recording into PXGF format with on-the-fly meta-data.
 Save as bmp: saves the two-dimensional songagram as an image.
 Close: closes the recording and sonagram.
 Exit: closes the application.
Sonagram in Different Bandwidths
W-SPEED loads an IQ recording in PXGF format. This format carries the actual timestamp, receiver fre-
quency and bandwidth (sampling rate) throughout the whole recording. W-SPEED displays a PXGF record-
ing in a sonagram with selectable bandwidths. W-SPEED displays the actual timestamp as the Y-axis. It
labels the X-axis with the absolute receiver frequency (Rx Freq) when it hasn’t changed during the whole
recording, otherwise the X-axis is labeled with the relative frequency with +/- half of the selected display
bandwidth and 0 in the middle.
The user can:
 Select a “Display bandwidth” among 250 kHz, 500 kHz, 1 MHz, 1.5 MHz, 2 MHz, 4 MHz, 8 MHz, 10
MHz, 12 MHz, 16 MHz and 24 MHz. Default bandwidth is 2 MHz.
 Change the “Color scheme” of the sonagram display.
 Change the “Gain”. This will change the signal amplitude during the calculation of sonagram.
 Click the button “Reload”, “Stop” or “Pause” to make the corresponding action to the sonagram
calculation and display.
 View the progress of the sonagram display.
 Move a cross cursor over the entire sonagram and spot display the “Rx Freq” and timestamp of
any point in the sonagram.
 Zoom-in view (max. 32 times) displays a sonagram in a max. resolution of 60 Hz per pixel at the
display bandwidth of 250 kHz.
 Two-dimensional navigation over the entire sonagram.