Technical data

4-29
Hardkey and Softkey Reference
SPECIAL FUNCTIONS. presents the special function menu.
SPECIFY CLASS. leads to the specify class menu. After the standards are modified, use this key to specify a class to
consist of certain standards.
SPECIFY CLASS DONE. finishes the specify class function and returns to the modify cal kit menu.
SPECIFY OFFSET. allows additional specifications for a user-defined standard. Features specified in this menu are
common to all five types of standards.
SPLIT DISP 1X 2X 4X. toggles between a full-screen single graticule display or two-, three-, or four-graticule,
multiple-channel display. Works with DUAL CHAN on OFF to determine the number of channels displayed.
STANDARD DONE. returns to the define standard menu.
Start. is used to define the start frequency of a frequency range. When the Start key is pressed it becomes the active
function. The value is displayed in the active entry area, and can be changed with the knob, step keys, or numeric
keypad.
STATS. calculates and displays the mean, standard deviation, and peak-to-peak values of the section of the displayed
trace between the active marker and the delta reference marker. If there is no delta reference, the statistics are
calculated for the entire trace. A convenient use of this feature is to find the peak-to-peak value of passband ripple
without searching separately for the maximum and minimum values. The statistics are absolute values: the delta
marker here serves to define the span. For polar and Smith chart formats, the statistics are calculated using the first
value of the complex pair (magnitude, real part, resistance, or conductance).
STD OFFSET DONE. is used to end the specify offset sequence.
STD TYPE: is used to specify the type of calibration device being measured.
STD TYPE: ARBITRARY\IMPEDANCE. defines the standard type to be a load, but with an arbitrary impedance (different
from system Z0).
STD TYPE: DELAY/THRU. defines the standard type as a transmission line of specified length, for calibrating transmission
measurements.
STD TYPE: LOAD. 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.
STD TYPE: OPEN. defines the standard type as an open used for calibrating reflection measurements. Opens are
assigned a terminal impedance of infinite Ωs, but delay and loss offsets may still be added. Pressing this key also brings
up a menu for defining the open, including its capacitance.
STD TYPE: SHORT. defines the standard type as a short used for calibrating reflection measurements. Shorts are
assigned a terminal impedance of 0 Ωs, but delay and loss offsets may still be added.
STEP SIZE. is used to specify the subsweep in frequency steps instead of number of points. Changing the start
frequency, stop frequency, span, or number of points may change the step size. Changing the step size may change the
number of points and stop frequency in start/stop/step mode or the frequency span in center/span/step mode. In each
case, the frequency span becomes a multiple of the step size.
STIMULUS VALUE. sets the starting stimulus value of a segment, using entry block controls. The ending stimulus value
of the segment is defined by the start of the next line segment. No more than one segment can be defined over the
same stimulus range.
STIMULUS OFFSET. adds or subtracts an offset in stimulus value. This allows limits already defined to be used for
testing in a different stimulus range. Use the entry block controls to specify the offset required.
Stop. is used to define the stop frequency of a frequency range. When the Stop key is pressed, it becomes the active
function. The value is displayed in the active entry area, and can be changed with the knob, step keys, or numeric
keypad.
STOP. sets the stop frequency of a subsweep.
STORE SEQ TO DISK. presents the store sequence to disk menu with a list of sequences that can be stored.
Menu. provides access to a series of menus which are used to define and control all stimulus functions other than start,
stop, center, and span. Operating parameters such as power, sweeptime, trigger condition, and number of points are
accessible through this hardkey.
SWEEP TIME [ ]. toggles between automatic and manual sweep time.