Technical data

4-13
Hardkey and Softkey Reference
the sweep speed but provides better signal-to-noise ratio. The selected bandwidth value is shown in brackets in the
softkey label.
IF LIMIT TEST FAIL. jumps to one of the six sequence positions (SEQUENCE 1 through 6) if the limit test fails. This
command executes any sequence residing in the selected position. Sequences may jump to themselves as well as to any
of the other sequences in memory. When this softkey is pressed, the analyzer presents a softkey menu showing the six
sequence positions and the titles of the sequences located in them. Choose the destination sequence to be called if the
limit test fails.
IF LIMIT TEST PASS. jumps to one of the six sequence positions (SEQUENCE 1 through 6) if the limit test passes. This
command executes any sequence residing in the selected position. Sequences may jump to themselves as well as to any
of the other sequences in memory. When this softkey is pressed, the analyzer presents a softkey menu showing the six
sequence positions, and the titles of the sequences located in them. Choose the sequence to be called if the limit test
passes (destination sequence).
IF LOOP COUNTER = 0. prompts the user to select a destination sequence position (SEQUENCE 1 through 6). When the
value of the loop counter reaches zero, the sequence in the specified position will run.
IF LOOP COUNTER < > 0. prompts the user to select a destination sequence position (SEQUENCE 1 through 6). When
the value of the loop counter is no longer zero, the sequence in the specified position will run.
IMAGINARY. displays only the imaginary (reactive) portion of the measured data on a Cartesian format. This format is
similar to the real format except that reactance data is displayed on the trace instead of impedance data.
INCR LOOP COUNTER. increments the value of the loop counter by 1.
INPUT PORTS. accesses a menu that allows you to measure the R, A, and B channels and their ratios.
INSTRUMENT MODE. presents the instrument mode menu. This provides access to the primary modes of operation
(analyzer modes).
INTENSITY. sets the LCD intensity as a percent of the brightest setting. The factory-set default value is stored in
non-volatile memory.
INTERNAL TESTS. leads to a series of service tests.
INTERNAL DISK. selects the analyzer internal disk for the storage device.
INTERNAL MEMORY. selects internal non-volatile memory as the storage medium for subsequent save and recall
activity.
INTERPOL on OFF. turns interpolated error correction on or off. The interpolated error correction feature allows the
operator to calibrate the system, then select a subset of the frequency range or a different number of points.
Interpolated error correction functions in linear frequency, power sweep and CW time modes. When using the analyzer
in linear sweep, it is recommended that the original calibration be performed with at least 67 points per 1 GHz of
frequency span.
ISOLATION. leads to the isolation menu.
ISOLATION DONE. returns to the two-port cal menu.
ISOL'N STD. measures the isolation of the device connected to the test port.
k/m. kilo/milli (10
3
/ 10
−3
)
KIT DONE (MODIFIED). terminates the cal kit modification process, after all standards are defined and all classes are
specified. Be sure to save the kit with the SAVE USER KIT softkey, if it is to be used later.
LABEL CLASS. leads to the label class menu, to give the class a meaningful label for future reference during calibration.
LABEL CLASS DONE. finishes the label class function and returns to the modify cal kit menu.
LABEL KIT. leads to a menu for constructing a label for the user-modified cal kit. If a label is supplied, it will appear as
one of the five softkey choices in the select cal kit menu. The approach is similar to defining a display title, except that
the kit label is limited to ten characters.
LABEL STD. The function is similar to defining a display title, except that the label is limited to ten characters.
LASER INT / EXT. switches the analyzer between the internal and external laser. When the external laser is selected, the
internal laser is automatically switched off.
LASER ON/OFF. allows you to turn the internal laser ON or OFF through the software. The laser key must be in the ON
position, and the safety interlock at the rear of the lightwave test set must be in place for this software setting to