Interference Immunity; Ifbw; Trace; Clear Write - BIRD BirdTechnologies SignalHawk SH-36S Operating Instructions Manual


If there are fewer points than screen pixels, the unit will
interpolate between them.
Note: Once the unit is calibrated, reducing the number of points
below 1409 does not require recalibration.

If there are more points, the unit will draw multiple data points in each
column.

Interference Immunity

Controls the discrimination between interfering signals from the system being
tested. If there are other signals in the system being tested, this function will
enable the unit to ignore the extraneous signals better, and record a more accu-
rate measurement.
Note: This feature should be enabled at all times, except when test-
ing long lengths of cable.

IFBW

Increases and decreases the internal filtering of the measurement. It can also func-
tion as a smoothing effect when measuring very low return losses. It achieves this
by reducing the IFBW (towards 100 Hz) which reduces the noise amplitude of the
display. Also, lower IFBW settings result in longer sweep times, and increase the
effectiveness of the interference immunity. The range is from 100 Hz to 1 MHz.
Note: For Gain-and-Loss 2-Port Measurement Only - When measur-
ing antenna isolation in the -80 to -90 dB range, the IFBW setting
needs to be 100 Hz.

Trace

Opens a trace submenu with the following options:

Clear Write

Switches off the Average and Max Hold functions.

Max Hold

Holds and displays the highest trace data points.

Average

Displays the running average of multiple readings.
Note: This may be used to smooth a trace.

Average Readings

Sets the number of readings to be averaged. The valid range is from 2 to 1024.

Reset Average

Resets the current running average of multiple readings.
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