Table 38 Ps TTY Information Lines
Information Line Description
Navg
The number of burst spectra that are averaged together prior to plotting.
Larger amounts of averaging increase the ability to see subtle spectral
components, but the display updates more slowly.
FIR
The length of the impulse response of the matched FIR filter. See 6.5.3
TTY Information Lines In Pb (page 135).
BW
The 3 dB bandwidth of the matched filter. This is the complete width of
the passband from the lower frequency edge to upper frequency edge.
Note that the filters center frequency is fixed at the radars intermediate
frequency, as chosen in the Mb setup command.
DC-Gain
The filter's response to DC (zero frequency) input.
The value is a negative number in decibels, or the word ZERO if the filter
has a true zero at DC. The filters DC gain should be kept at a minimum so
that
fixed osets in the A/D converters do not propagate into the
synthesized I and Q values.
Freq
The mean frequency of the burst.
Pwr
The average power in the full burst sample window.
Loss
The filter loss is a positive number in deciBels, and is only displayed if the
overall burst power exceeds the minimum valid burst threshold set in the
Mb command (It would not be possible to compute the filter loss when
the burst waveform is missing).
See 6.6.4 Computing Filter Loss (page 144).
Chapter 6 – Plot-assisted Setups
143
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