Vaisala RVP900 - TTY Information Lines Within Ps

Command Description
&
Saves Tx waveform and Rx filter coecients as well as parameters defining the
$IRIS_DATA/temp/pwd_<pulse_number>.dat file, usually /usr/iris_data.
Files are in Octave data format.
All data
files contain the RVP9 clock frequency (variable RVP_clock_MHz) pulse IF
frequency (variable IF_freq_MHz).
CW pulse data contain the CW_bandwidth_MHz variable.
NLFM pulse data contain the following pulse variables: NLFM_bandwidth_MHz,
NLFM_pulsewidth_usec, NLFM_param_0, NLFM_param_1, and NLFM_param_2.
Each data
file contains the following waveforms and filters:
• tx_waveform_0 - Zero frequency centered Tx waveform
• tx_waveform_if - Tx waveform up-converted to IF
• rx_filter_0 - Zero frequency centered Rx
filter
• rx_filter_if - Rx filter up-converted IF
If a pulse has an associated chained pulse, there are the following additional waveforms:
• tx_chained_waveform_0 - Zero frequency-centered combined Tx waveform
• tx_chained_waveform_if - Tx waveform up-converted to the main pulse IF
See 6.6.7 Plotting Example for Pulse Width
Definition, Waveform, and Filters (page 152)
and 6.6.8 Plotting Example for Range Resolution Ambiguity (page 154).
V/v
Increments or decrements the number of burst pulse 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
Zooms (on a logarithmic scale) in 1.0-dB steps the amplitude of the burst pulse spectra.
This is useful when the overall 70 dB plot span is not sucient to hold the full range.
Zoom can also be used to line up the burst spectrum with the filter response so that they
can be compared.
The zoom level is not printed on the TTY.
< space >
The space bar alternates between the following options for the type of plotted spectra:
• FIR frequency response
• Burst pulse spectrum
• Both.
%
In dual-receiver mode, the % command toggles between each receiver. The printed status
line is prefixed with Rx:Pri or Rx:Sec according to the selected receiver.
Type % to toggle the plot of the FIR filters frequency response, and the printout of its
DC-Gain.
The plotted spectrum and printed power levels are based on the sum of all input signals
and do not change with %.
6.6.3 TTY Information Lines Within Ps
The TTY information lines resemble:
Navg:3, FIR:1.33usec (48 Taps), BW:1.000, MHz, DCGain:ZERO
Freq:30.027 MHz, Pwr:64.2 dBm, Loss:1.2dB, AFC:23.05%
(Manual)
RVP900 User Guide M211322EN-J
142