HP 5335A - Page 28

Operation and Programming
is pressed, the measurement is displayed with only that specified math function activated. The
remaining functions, though programmed with constants, are still DISABLED. To reactivate these
stored functions, recall each (by pressing the blue key) and then press ENTER.
3-77. SAMPLE MATH OPERATIONS. The following examples illustrate the operation of the
MATH GROUP functions.
A. With an input frequency of 10.001 MHz, enter an offset of ~10 MHz:
Keystrokes: OFFSET CHS 1 EEX 7 ENTER
Measured value: 10.001 MHz
Displayed value: 1 kHz
B. Suppose you are currently measuring a 3.56 MHz color TV crystal. To set -3.56 MHz as
the offset:
Keystrokes: OFFSET LAST DISP ENTER
-3.56 E6 will be displayed
Measured value: 3.56 MHz
Displayed value: 0 Hz
C. Suppose in the above example you wished to display percentage error instead:
Keystrokes: OFFSET LAST DISP ENTER
-3.56 E6 will be displayed
DISABLE (lets 3.56 MHz be displayed without the offset)
NORMLZ LAST DISP ENTER
3.56 E6 is now in NORMLZ
SCALE 1 0 0 ENTER (100 is now in SCALE)
OFFSET ENTER (turns OFFSET on again)
Measured value: 3.61 MHz
Displayed value: 1.4045 (percent error from 3.56 MHz)
D. To display an measurement in rpm (revolutions per minute):
Keystrokes: SCALE 6 0 ENTER
Measured value: 100
Displayed value: 6.000 E3
E. To show change in frequency per second (approximately, averaged over 1 second
gate times):
Set Gate Adjust to a 1-second gate time, and CYCLE Mode to MIN.
Keystrokes: OFFSET MEASt~i ENTER
A "t-1” will be displayed
Measured value: 1000 Hz
Measured value: 1002 Hz
Displayed value: 2 Hz
Measured value: 1005 Hz
Displayed value: 3 Hz
More precise timing of the gate can be achieved by arming.
3-12
Model 5335A