Manual

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b.b.

Selection of FiltersSelection of Filters

Selection of Filters

There are two sets of filters with the following characteristics available:

Set 1:

LINEAR Linear frequency response (no filtering)

A-WTD A-weighting filter acc. IEC 60651

C-MESS C-Message filter acc. CCIR Rec. 468-4

HP22 Highpass 22 Hz acc. DIN 45045, -120 dB/dec.

HP60 Highpass 60 Hz acc. DIN 45045, -120 dB/dec.

HP400 Highpass 400 Hz acc. DIN 45045, -120 dB/dec.

VOICE Voice band filter acc. ITU-T P.48

Set 1 filters are applicable with the measurement functions LEVEL

RMS, LEVEL REL, THD+N and SWEEP.

Set 2:

LINEAR Linear frequency response (no filtering)

A-WTD A-weighting filter acc. IEC 60651

C-WTD C-weighting filter acc. IEC 60651

X-CRV

-1

inverted X-Curve filter acc. ISO 2969

Set 2 filters are applicable with the measurement functions LEVEL-

SPL and 1/3

OCT., whereby the X-CRV

-1

filter is enabled in the

1/3

OCT. mode only.

Any selected filter will stay active until it is disabled by the user. However,

if the filter is not supported by the measurement function, it will be

disabled automatically.

2.52.5

2.5

Menu BarMenu Bar

Menu Bar

The menu bar, located at the top of the LCD, allows the user to select

the measurement function, to activate a filter or to enter the setup screen.

The field on the right hand side displays the battery voltage status of the

unit.

To make any selection move the cursor to one of the menu bar fields and

press the enter key.

a.a.

Selection of Measurement FunctionSelection of Measurement Function

Selection of Measurement Function

The entries of the pull down menu (Fig 4) are the following:

• LEVEL RMS

• LEVEL REL - the RMS input level relative to a user-defined reference

level

• LEVEL SPL - sound pressure level

• THD+N - total harmonic distortion and noise

• vu + PPM - volume indicator and peak program meter, selectable

standards are Type I, Type IIA, Nordic

• POLARITY - analysis function corresponding to the Minirator MR1

polarity test signal, acquired either by direct cable connection or

through the built-in microphone of ML1

• BALANCE - the signal balance error quantitatives the level deviation

between pin 2 and pin 3 of the XLR input connector

• SWEEP - sweep recording with respect to frequency or time

• 1/3

OCT. RMS - one third octave spectrum of line input signal

• 1/3

OCT. SPL - one third octave spectrum of microphone input

signal, sound pressure level

• SCOPE - the time graph of the input signal

Basic Operation Basic Operation

2-052-04

Fig 4 Example of Function Submenu

Fig 5 Example of Filter Submenu