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Input/Output
Linear Video (RF Envelope, Ref=Ref Level)
Selects the analog output to be the envelope signal on a linear (voltage) scale. In this mode, the
pre-detector data is output to the Analog Out connector with a Linear scaling. The output is based on the
current Reference Level, and is not influenced by the selected detector or any digital flatness corrections
or trace post-processing (like Trace Averaging).
The scaling is set so that 1 V output occurs with an instantaneous video level equal to the reference level,
and 0 V occurs at the bottom of the graticule. This scaling gives you the ability to control the gain
without having another setup control for the key. But it requires you to control the look of the display
(the reference level) in order to control the analog output.
This mode is ideal for looking at Amplitude Modulated signals, as the linear envelope effectively
demodulates the signal.
Demod Audio
Selects the analog output to be the demodulation of the video signal.
When Demod Audio is selected, the demodulated audio signal appears at this output whenever the
Analog Demod application is demodulating a signal.
When Analog Out is in the Auto state, this output is auto-selected when in the Analog Demod mode.
If any other Analog Output is manually selected when in the Analog Demod mode, a condition warning
Key Path: Input/Output, Output Config, Analog Out
Example: OUTP:ANAL LINV
Dependencies: Because the Linear Video output uses one of the two IF processing channels,
only one detector is available while Linear Video is selected. All active traces
will change to use the same detector as the selected trace when Log Video is
activated.
Linear Video output is not available while any EMI Detector is selected
(Quasi Peak, RMS Average or EMI Average), because these detectors use
both IF processing channels. Consequently, if the user chooses an EMI
Detector, there will be no Linear Video output.
The output holds at its last value during an alignment and during a marker
count and during retrace (after a sweep and before the next sweep starts).
This function depends on optional capability; the key will be blanked and the
command will generate an “Option not available” error unless you have
Option YAV licensed in your instrument.
Couplings: Linear Video output changes while in FFT Sweeps, so for measurements that
use exclusively FFT Sweeps, or if the user manually chooses FFT Sweeps, the
Linear Video output will look different than it does in swept mode.
Readback Text: Linear Video
Initial S/W Revision: A.04.00