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3.3.

MEASUREMENT FUNCTIONSMEASUREMENT FUNCTIONS

MEASUREMENT FUNCTIONS

3.13.1

3.1

Level RMSLevel RMS

Level RMS

LEVEL RMS reflects the absolute level of the line input signal.

To enter the LEVEL RMS mode, select LEVEL -> RMS in the measurement

functions submenu.

Signal Balance: This indicates the deviation from level-match of the

incoming balanced signal between pin 2 and pin 3 in percent (%).

The position of the arrow indicates the following:

• Arrow in center, the input signal is balanced.

• Arrow out of center, linear indication of a balancing problem, e.g.

arrow moves left nearer to the number 2 shows the signal level

on pin 2 is higher than on pin 3.

• Left or right end, the signal balance error is 33% or higher. 33%

equals a difference in the signal level of 6 dB.

• UNBAL, the signal balance symbol changes to UNBAL at the signal

balance error exceeding 90%.

Result and Unit: Level RMS. The units dBu, dBV or V may be selected.

Bargraph: The bargraph provides an analog display of the RMS level.

The scaling may be controlled automatically or manually.

• Select manual (M) or automatic (A) scaling by the bargraph zoom

mode field.

• Within the manual scaling (M) select the bargraph zoom control,

press enter and the left/right keys to scroll through the

Fig 10 Level RMS Meter Panel

Measurement Functions

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2.62.6

2.6

Inputs and Monitor OutputInputs and Monitor Output

Inputs and Monitor Output

On top of the ML1, three connectors as well as the internal microphone

are located (Fig 9):

• The XLR and RCA inputs allow to feed a signal to the ML1.

• A 3.5 mm (1/8“) jack monitor output allows the connection of a

headphone. Thus, the user may hear the input signal.

• The internal microphone provides the possibility to test the polarity

of an acoustical signal if the NTI’s Minirator MR1 polarity check

signal is played back. This especially serves to check the polarity

of loudspeakers.

NOTE Never connect the XLR- and the RCA input at the same

time!

2.72.7

2.7

Music DetectionMusic Detection

Music Detection

Automatic gain control is applied to the input signal before being analyzed

and made audible from the monitor jack. In this mode, the monitor signal

behaves similar like a compressor output, whereby the user hears an

almost constant sound pressure level. For input levels lower -20 dBu the

gain is set to +20 dB.

NOTE The automatic music detection is only available in the

measurement functions LEVEL RMS, LEVEL REL, THD+N,

POLARITY, BALANCE, SWEEP and SCOPE.

Fig 9 Inputs and Outputs of ML1

Basic Operation

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