USER’S MANUAL__________________________________________________________________
168 _________________________________________________________________ M211322EN-D
5.5.2 Available Subcommands Within Pr
The list of subcommands is printed on the TTY:
Available Subcommands within Pr:
These subcommands change the start time and span of the IF sampling
window, and alter the format of the display:
L/l & R/r Start range Left/Right
T/t Plot time span Up/Dn
V/v Number of spectra averaged
Z/z Amplitude zoom
<space> Alternate Plots
> and < Start/Stop logging to rvp9-pr.log
% Toggle between IF input channels
- Single Step
L/l & R/r The L and R commands shift left and right the starting
point of the window of IF samples. The lower case
commands shift in 0.25 µsec steps, and the upper case
commands use 10 µsec steps. The starting point is
displayed both in microseconds and kilometers on the
TTY, and is not allowed to be set earlier than range zero.
T/t The T command increments or decrements the time
duration of the window of IF samples. The window is not
allowed to become shorter than the impulse response
length of the FIR filter, since that would preclude
calculating even a single LOG power point. The value is
reported in microseconds on the TTY, and the largest
permitted span is 50 µsec.
V/v The V command increments or decrements the number of
power spectra that are averaged together to create the plot.
The count ranges from one (no averaging) to 25, and is
reported on the TTY as "Navg".
Z/z The Z command zooms the amplitude of the IF samples by
factors of two from one to 128. The LOG plots are shifted
in corresponding 6 dB increments as the amplitude is
zoomed up and down. The zoom level is reported on the
TTY so that absolute power levels and A/D usage can be
assessed.
<space> The space bar alternates among three choices for the type
of data that are plotted: Received Samples, Received
Samples and LOG Power, and Received Power Spectrum.
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