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Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
SPECTRUM
ANALYZER
sets the analyzer to the spectrum analyzer operating mode
and accesses the PRESET SPECTRUM softkey function.
Front-Panel Key Access
IIVIODE)
or
C-1
SCjUELCH
adjusts the squelch level. The squelch level mutes weak
signals and passes strong signals. The squelch level affects
the audio output only. If the internal speaker is on, audio
signals are not output unless the signal strength exceeds the
squelch threshold. The squelch level does not affect the
rear- AUX VIDEO OUT signal. Squelch level is indicated
on-screen by the
unitless
numbers 0 to 100, with 0 being
minimum squelch threshold (all signals are passed), and 100
being maximum squelch threshold (no signals are passed).
The default squelch value is 0.
Front-Panel Key Access
(AUX]
SRC ATN
MAN
AIR’0
Option 011 only.
allows you to select between automatic and manual
adjustment of the tracking generator’s switching
attenuator. The HP
8591C
cable TV analyzer can be
manually adjusted from 0 to 60
dB
in 10
dB
steps. When
auto-coupled, the SRC ATN function automatically
adjusts the attenuator to yield the source amplitude level
specified by the SRC PWR ON OFF softkey function. Set
SRC ATN MAN AUTO so that MAN is underlined (decoupled)
for power sweeps greater than 10
dB
for the HP
8591C
cable
TV analyzer.
SRC PWR
OFFSET
Front-Panel Key Access
[AUXCTRL_)
Option 011 only.
offsets the displayed power of the tracking generator (SRC).
Offset values may range from -100
dB
to + 100
dB.
Using the source-power-offset capability of the tracking
generator allows you to take system losses or gains into
account, thereby displaying the actual power delivered to
the device under test.
Front-Panel Key Access
(AUX]
6-136