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Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
SWEEP
TIME DAC
displays the output of the sweep-time DAC
(SWP-DAC)
from
the sweep-ramp generator that is on the
A7
Analog Interface
assembly. This is a service diagnostic function and is for
service use only.
Front-Panel Key Access
ICAL)
WE’
CPLG
SR SA
Option 011 only.
selects stimulus-response (SR) or spectrum-analyzer
(SA) auto-coupled sweep time. In stimulus-response
mode, auto-coupled sweep times are usually much faster
for swept-response measurements. Stimulus-response
auto-coupled sweep times are typically valid in
stimulus-response measurements when the system’s
frequency span is less than 20 times the bandwidth of the
device under test.
Front-Panel Key Access
[AUXCTRL)
SWP TIME
AUTO MAN
selects the length of time in which the analyzer sweeps
the displayed frequency span. In all non-zero frequency
spans, the sweep time varies from 20 milliseconds to 100
seconds. In zero frequency span, the fastest sweep time is
15 milliseconds. Reducing the sweep time increases the rate
of sweeps. The sweep time can be changed using the step
keys, the knob, or the numeric keypad.
Provides sweep times from 20
,US
to 20 ms in zero span.
Front-Panel Key Access (AUTO COUPLE) or
[SWEEP]
6-140