Glossary - Tektronix 80A01 User Manual

Glossary

80A01 Trigger Prescale Limiting Preamplifier Module User Manual
Attenuation
A decrease in magnitude of current, voltage, or power of a signal.
Attenuator
An electronic transducer that reduces the amplitude of a signal.
Bandwidth
The range of frequencies handled by a device or system. Bandwidth is a
measure of network capacity. Analogue bandwidth is measured in cycles per
second. Digital bandwidth is measured in bits of information per second.
Channel
A place to connect a signal or attach a network or transmission line to
modules.
dB
Decibel: a method of expressing power or voltage ratios. The decibel scale is
logarithmic. The formula for decibels is:
dB = 20 log (V /V )
i ref
where Vi is the voltage of the incident pulse, V
and log is the decimal-based logarithmic function.
Dialog Box
A displayed box in which you enter instrument commands.
External Attenuation
Attenuation that is outside the module.
Impedance
The opposition to an AC signal in the wire. Impedance is very much like
resistance to a DC signal in a DC circuit. Impedance is made up of resistance
and inductive and capacitive reactance.
Trigger
An electrical event that initiates acquisition of a sample as specified by the
time base.
Waveform
The visible representation of an input signal or combination of signals.
is the voltage reference,
ref
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