Fluke PM3370B Mathematics Filter, Press the softkey next to Math 1 to enter the Math 1 submenu

HOW TO USE THE INSTRUMENT 4 - 55

MATHEMATICS FILTER

-Press the ANALOG key to select the digital mode.

-Press the MATH menu key.

The MATH menu is displayed on the screen. Observe that MATH 1 is the default.

-Press the softkey next to MATH 1 to enter the MATH 1 submenu.

This menu is used to select one of the four mathematic functions: ’add, sub, mul, filter’.

Observe that the default process for MATH 1 is the ’filter’ function. Typical use of the digital low-pass filter is to suppress noise even after a (single shot) acquisition has to be captured.

You can select between the acquired signal or a stored signal to be the source. The trace information in the source trace is mathematically filtered by a low-pass filter.

The resulting trace is automatically stored in memory location ’m1 and displayed on the screen.

-Turn the TRACK control to select ’acq’.

-Press the ’ENTER’ softkey.

-Press the key next to ’on off’ to turn MATH 1 on.

1-
CH1 200mV	3dB=4.25kHz
	MTB 200μs	ch1

TRACK
1-
	3dB=11.2kHz
CH1 200mV	MTB 200μs	ch1
		ST6745

-Turn the TRACK control to change the cut-off frequency.

-Switch off MATH 1 again before continuing to the next section.