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shows the HP-IB address of the
Lo
source.
defines the standard type as a load (termination). Loads
are assigned a terminal impedance equal to the system
characteristic impedance ZO, but delay and loss offsets may still
be added. If the load impedance is not ZO, use the arbitrary
impedance standard definition.
LDAB
AlO
WFSET
initiates measurement of a calibration standard load without
offset.
initiates measurement of a calibration standard load with offset.
presents the load sequence from disk menu. Select the desired
sequence and the analyzer will load it from disk.
ILocal)
This key is used to return the analyzer to local (front panel)
operation from remote (computer controlled) operation. This
key will also abort a test sequence or hardcopy print/plot. In
this local mode, with a controller
stilI
COMeC!ted
on HP-IB, the
analyzer can be operated
manuaIly
(locally) from the front
panel. This is the only front panel key that is not disabled
when the analyzer is remotely controlled over HP-IB by a
computer. The exception to this is when local lockout is in
effect: this is a remote command that disables the
m
key,
making it difficult to interfere with the analyzer while it is
under computer control.
.,..
Let
G
:.m4
.,......
activates a logarithmic frequency sweep mode. The source is
stepped in logarithmic increments and the data is displayed on
a logarithmic graticule. This is slower than a continuous sweep
with the same number of points, and the entered sweep time
may therefore be changed automatically. For frequency spans
of less than two octaves, the sweep type automatically reverts
to linear sweep.
displays the log magnitude format. This is the standard
Cartesian format used to display magnitude-only measurements
of insertion loss, return loss, or absolute power in
dB
versus
frequency.
displays the logarithmic magnitude value and the phase of the
active marker in Polar or Smith chart format. Magnitude values
are expressed in
dB
and phase in degrees. This is useful as a
fast method of obtaining
a
reading of the log magnitude value
without changing to log magnitude format.
Koy Definitions
B-23