Level relativ – NTi Audio Minilyzer ML1 User Manual

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actual range or the up/down keys to increase or decrease the

range (sensitivity) of the bargraph scale.

• Press enter to confirm your setting.

display filter: see Display Mode
NOTES • For balanced input levels higher than +20 dBu, the

ML1 Adapter -20dB may be applied. (for details see

Accessories).

• The LEVEL RMS function is also available in the

sWeep mode and in 1/3

oCT. rMs mode

Level Relativ

This function measures the input RMS level, relative to a user-defined

reference level.

Measurement Functions

Fig 3.2 Level Relative Meter Panel

eference Level

The reference level has to be

defined in the following way:

• Select the LEVEL REL

mode

• Apply the intended

reference level to a

ML1 input connector.

• Move the cursor to the

REF field below the main

result line and press the

enter key

This stores the applied level as the current reference level for all further

level relative measurements until a new reference level is set. The

level relative is indicated in dBr (dB relative) or %.
The level relative function may be used to measure the signal-to-noise

ratio (S/N) of a device under test (DUT) in the following manner:

• Set the unit of the level relative measurement to dBr.

• Connect the DUT output to the ML1 and mute the DUT output.

• Adjust the reference level to this signal as described above. By

this, the ‘noise’ signal of the DUT is acquired.

• Enable the DUT, thus applying the signal to the ML1. The resulting

level relative value reflects the S/N ratio in dB.