Keysight x-series Instruction Manual

6 Input/Output
6.7 Output
Furthermore, the PSA Option 124 hardware was unipolar, and its large range was
padded to be exactly right for use as a Screen Video output. In the X-Series, the
hardware is bipolar and has a wider range to accommodate the other output
choices. Therefore, the outputs won’t match up exactly and users may have to
modify their setup when applying the X-Series in a PSA application.
Log Video
Log Video shows the RF Envelope with the Reference equal to the Mixer Level. The
output is designed so that full scale (1 V) corresponds to -10 dBm at the mixer. The
full range (0-1 V) covers 192.66 dB ; thus, 0 V corresponds to -202.66 dBm at the
mixer.
Because the Log Video output uses one of the two IF processing channels, only one
detector is available while Screen Video is selected. All active traces will change to
use the same detector as the selected trace when Log Video is activated.
Log 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 Log
Video output.
The output holds at its last value during an alignment, during a marker count, and
during retrace (after a sweep and before the next sweep starts).
This function depends on optional capability. The choice will not appear, and the
command will generate an “Option not available” error unless you have Option YAV
licensed in your instrument.
Log Video output changes while in FFT Sweeps, so for measurements that use
exclusively FFT Sweeps, or if the user manually chooses FFT Sweeps, the Log Video
output will look different than it does in swept mode.
Linear Video
Linear Video shows the RF Envelope with the Reference equal to the Ref Level. 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.
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
2157 Short Range Comms & IoT Mode User's &Programmer's Reference

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)