HP 5335A - Page 27

Operation and Programming
Table 3-1. Function Key Use During Number Entry
FUNCTION KEY
FUNCTION DURING NUMBER ENTRY
0-9, Digit entry. Before EEX is pressed, these are used to enter the mantissa value.
Up to 11 digits are allowed. After EEX is pressed, these are used to enter the
exponent value.
EEX Enter Exponent. Begins exponent entry when pressed.
CHS CHange Sign. Toggles the sign of the mantissa or exponent, depending upon
whether EEX was pressed.
CLR CLeaRs entry.
ENTER
Completes entry of number. After ENTER is pressed, the instrument goes back
to making measurements. If the value entered was zero, the specified constant
is turned “off”. This is indicated by turning the key’s LED off. Ifthe valueentered
was not zero, the specified constant is turned “on”. This is indicated by turning
the key’s LED on. When a constant is “off” it is ignored in the equation.
RESET During number entry, RESET can be used to abort the entry and return to
normal operation.
DISABLE v During number entry, this key produces the same effect as entering zero as the
value. The specified constant is turned off and normal operation begins. ENTER
does not have to be pressed.
SPECIAL NUMBER ENTRY KEYS
LAST DISP
This key will put on the display the value that was displayed from the last
measurement. If you are presently entering in a value to OFFSET, the iast display
value is negated. This lets you conveniently subtract our errors or values based
on measurements you’ve made. For NORMLZ and SCALE, the last display value
is not negated.
MEASt-i
This key does not specify any unique value, but instead, specifies that as each
measurement is made, the previous measurement’s value (before any mathe¬
matical manipulation) be used.
Previous measurement (t-i} this measurement (to) display
12345 12346 1
This is an example of MEASt-i with OFFSET. As with LAST DISP, the value is
negated for OFFSET, and not for NORMLZ and SCALE.
3-73. REVIEWING CONSTANTS. To review the constants, press any of the blue keys. The
counter will cease taking measurements and the presently specified value of the constant will be
displayed. The indicator light within the blue key specified will be flashing. At this time, either
the value of the constant can be changed by keying in the new number and pressing ENTER, or
all of the constants can be reviewed by pressing each blue key in succession. To return to the
measurement mode, press either RESET or ENTER.
3-74. DISABLING MATH OPERATIONS. When not in the number entry mode (i.e., a blue key
has not been pressed) the DISABLE key can be used to momentarily turn off all of the math
functions. The DISABLE function toggles between on and off with each press of the key. The
DISABLE key's indicator light turns on when the math functions are disabled and off when the
math functions are enabled. While disabled, the indicator lights within the individual math
function keys are turned off.
3-75. During the number entry mode (i.e., pressing any blue key) the DISABLE key produces
the same effect as entering zero (or one) as the value of the constant. The specified math function
is turned off and the counter begins normal measurements. The ENTER key does not have to be
pressed and the remaining math functions (if previously loaded) are reinstated.
3-76. If DISABLE is on and a blue key is pressed (number entry mode) the disable condition is
defeated for the specified math function only. A new constant can be entered, and when ENTER
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