Spectrum Analyzer Mode: Spectrum Mode Operation
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Press to enter the TIMEBASE submenu, then to return to ZERO
SPAN main menu. Use the up and down diamond keys to scroll
through sweep times offered in the Edit Box, and to turn the
auto sweep trigger on or off.
Press to enter the LEVEL submenu, then again to return to the
ZERO SPAN screen.
Press to change the active marker between Desired (Signal)
and Undesired (Noise). Typically, these markers are used in
Zero Span to clearly identify TDMA digital carriers and transient
signals.
Press this to enter the BANDWIDTH submenu. The
BANDWIDTH menu allows you to set the resolution bandwidth,
video bandwidth, and carrier measurement bandwidth.
This soft key will reset the trace averaging algorithm.
Press to turn sweep trigger on or off using the up and down
diamond keys. With the trigger off, the instrument displays
continuous update. When it’s on, the display does not update
until the incoming signal is above the center line of the graph.
Press this soft key to return to previous mode.
AMPLIFIER/LOW-PASS FILTER Submenu
Press this to enter the AMPLIFIER/LOW-PASS FILTER
submenu. This submenu allows you to enable and disable the
internal low pass filter and amplifier, as well as peak search on
the markers.
Press to enable or disable the 13 dB amplifier when working
with low level signals. The right side darkens when it’s enabled.
Press to enable or disable the 50 MHz low-pass filter. When
enabled, the filter attenuates frequencies above 50 MHz for
better evaluation of the return path. This filter eliminates
downstream carriers from the input, which improves dynamic
range.
Press to place the active marker at the time with the greatest
amplitude.
Press to toggle the D and U markers between active and
inactive, as appropriate.
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