TTY information lines in Pb
An example of TTY information lines:
Zoom :x2, PlotSpan:5 usec, FIR:1.36 usec (259 Taps) IF:Ch5(TXB)
Freq:59.987 MHz, Pwr :–12.9 dBm, DC:0.14%, Trig#1:–5.00| Information line | Description |
|---|---|
Zoom |
Indicates the magnification (in amplitude) of the plotted samples. A zoom level of "x1" means that a full scale A/D waveform exactly fills the height of the sample window. Generally, the signal strength of the burst pulse is not quite this high. Use larger zoom levels to see the weaker samples more clearly. You may zoom in powers of two up to x128. |
PlotSpan |
Indicates the overall time span in microseconds of the complete scope display, from left edge to right edge. |
FIR |
Indicates the length of the impulse response of the passband FIR filter, and hence, the duration of the burst pulse sample window. The length is reported both as a number of taps, and as a time duration in microseconds. If you are using an idealized matched filter, this value must be the burst pulse length. |
IF |
Indicates which IF input source (SMA edge connector) is providing the data being plotted. |
Freq |
Indicates the mean frequency of the burst, derived from a fourth order correlation model. The control parameters for this model are set using the Mb command. |
Pwr |
Indicates the mean power within the full window of burst samples. DC offsets in the A/D converter do not affect the computation of the power, that is, the value shown truly represents the waveform's (Signal+Noise) energy. |
DC |
Indicates the nominal DC offset of the burst pulse A/D converter. This is of interest only as a check on the integrity of the front end analog components. The value should be in the range ± 2.0%. |
Trig#1 |
Indicates the starting time of the first RVP10 trigger outputs. This number varies as the L and R subcommands cause the triggers to slew left and right. If the radar transmitter is directly fired by an external pretrigger, the pretrigger delay (in the form PreDly:6.87) is printed instead. |