PAM BIT Analyzer (PRO Only)

 

General description

The PAM BIT Analyzer (PBA) is a tool for Pulse Amplitude Modulated (PAM) bit length analyzing.

 

The FBA decoder searches the transmission within the given frequency boundaries. Also you can set the frequency by double clicking the mouse on the required frequency position. When a transmission has been detected within the given range, the decoder will then lock itself to that frequency. When locked, the decoder draws a bold blue line on the spectrum display at the currently locked frequency. If the decoder is not locked, then the blue line is not shown as bold.

 

In the non-locked state, the carrier frequencies are automatically monitored within the given frequency boundaries. If the carrier frequency changes, then the decoder moves to a new frequency. If 'Lock' is pressed in the user interface, then the decoder will not automatically change the frequency. ‘Reset’ resets the decoder and the results can be saved using ‘Save’. The parameters can be modified pressing the ‘Config’ button.

 

SkySweeper supports both FFT and waterfall display modes for decoder tuning. The Decoder Spectrum Dialog chapter gives more information about spectrum display options.

 

Configuration

Pressing the ‘Config’ button opens the following Configuration dialog box.

 

 

 

 

Parameters

 

Tone Scan Area

The frequency range scanned for the PAM transmission. The transmission is only searched for inside this frequency window.

 

Line length

The Line length in milliseconds.

Number of Lines

The Number of Lines in the display

Line Start Offset

The offset indicates how much the signal is delayed in milliseconds before printing starts from the zero position.

 

Line Width

The Line Width in pixels.

Line space

The Number of pixels between lines

 

AVG Filter Length

This shows the Average filter length in milliseconds (ms). If the baud rate is low, the longer average filter gives better analyzing performance.

 

Manual Threshold

If checked, the user can adjust the detection threshold manually.

 

Print statistics into text window

If this switch is selected, the analyzed results (bit lengths) will be printed into the text window.

Time stamp

If this switch is selected, the time stamp is added to the text. This works only if ‘Print statistics into text window’ is selected.

Bit 0 color

Defines a color used in ‘0’ bit printing.

Bit 1 color

Defines a color used in ‘1’ bit printing.

Space color

Defines the color that is used to separate lines.