HP 8591C User Manual page 349

syntax
The grammar rules that specify how commands must be structured for an
operating system, programming language, or applications.
system frequency response
Frequency response test that measures the flatness of the entire system.
trace
A trace is made up of a series of data points containing frequency and
amplitude information. The series of data points is often referred to as
an array. Traces A, B, and C are the typical names of traces that the
analyzer displays. The number of traces is specific to the instrument.
tune configuration
Tune conEguration refers to the correlation between the channel numbers
and the frequency to which a channel is assigned. For example, the
frequency at which channel 1 is broadcast differs between the HRC and
different tune conEgurations-STD, AIR, IRC, and HRC.
units
Dimensions on the measured quantities. Units usually refer to
amplitude quantities because they can be changed. In analyzers with
microprocessors, available units are dBm (dB relative to 1 mW dissipated
in the nominal input impedance of the analyzer), dBmV (dB relative to
1 mV), dBpV (dB relative to 1 pV>, volts, and, in some analyzers, watts.
unscrambled
A signal that has not been scrambled. An unscrambled signal does not
need a decoder to receive the signal correctly.
update
To make existing information current; to bring information up to date.
variable
A variable can be assigned a value. The value assigned to a variable can
be changed.
vertical interval test signal
The vertical interval test signal (VITS) is a signal that may be included
during the vertical blanking interval to permit in-service testing and
adjustment of video transmission.
Glossary- 16