Glossary
Glossary–10
2715 User Manual
Static (Amplifier) Resolution Bandwidth
The specified bandwidth of the spectrum analyzer’s response to a continuous
wave (CW) signal, if sweep time is kept substantially long. This bandwidth
is the frequency separation of two points on the response curve, usually 6 dB
down, if it is measured either by manual scan (true static method) or by
using a very low speed sweep (quasi-static method).
Sweep Speed, Sweep Rate
The speed or rate, expressed in time per horizontal division, at which the
electron beam of the CRT sweeps the screen.
Vertical Scale Factor, Vertical Display Factor
The number of dB, volts, etc., represented by one vertical division of a
spectrum analyzer display screen.
Video
The term is used here generally to mean a signal after the detector stage. It
can also be used more specifically to mean a base-band (zero carrier
frequency) television signal.
Video Filter
A postdetection low-pass filter.
View (Display)
Enables viewing of contents of the chosen memory section (e.g., “View A”
displays the contents of memory a; “View B” displays the contents of
memory B).
Visual Carrier Level
The rms voltage of a channel’s visual (picture) carrier, considered as a
sine-wave, at the peak of the modulation envelope, measured across a
termination impedance which matches the internal impedance of the system.
Volatile/Nonvolatile Storage
A volatile storage system is one where any total loss of power to the system
will result in a loss of stored information. Nonvolatile memory is not subject
to the instrument power supply for its storage.
Waveform Subtraction
A process wherein a saved waveform can be subtracted from a second, active
waveform.
Zero Pit (Response)
An output indication which corresponds to zero input frequency.
Zero Span
An operating mode in which the frequency span is reduced to zero.
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