5-39
Hardkey/Softkey Reference
Analyzer Functions
The possible values that can be entered for number of
points are 3, 11, 26, 51, 101, 201, 401,801, and 1601. The
number of points can be different for the two channels if
the stimulus values are uncoupled.
In list frequency sweep, the number of points displayed is
the total number of frequency points for the defined list
(see “Sweep Types” in the “Operating Concepts” chapter of
the user’s guide).
determines the number of measurement/correction
iterations performed on each point in a power meter
calibration. This feature helps eliminate residual power
errors after the initial correction. The amount of residual
error is directly proportional to the magnitude of the
initial correction. The user should initially set the source
power so that it is approximately correct at the device
under test. If power uncertainty at the device under test is
expected to be greater than a few dB, it is recommended
that the number of readings be greater than 1.
selects the calibration standard load as being offset.
is used to specify the one-way electrical delay from the
measurement (reference) plane to the standard, in seconds
(s). (In a transmission standard, offset delay is the delay
from plane to plane.) Delay can be calculated from the
precise physical length of the offset, the permittivity
constant of the medium, and the speed of light.
completes the selection in the Offset Load Menu.
is used to specify energy loss, due to skin effect, along a
one-way length of coax offset. The value of loss is entered
as Ωs/nanosecond (or Giga Ωs/second) at 1 GHz. (Such
losses are negligible in waveguide, so enter 0 as the loss
offset.)
is used to specify the characteristic impedance of the coax
offset. (Note: This is not the impedance of the standard
itself.) (For waveguide, the offset impedance should always
be assigned a value equal to the system Z0.)
is used to omit the isolation portion of the calibration.
is used to toggle the isolation portion of the calibration for
the ECal correction routine.
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