B&K 2250 Light Manual do Utilizador descarregar pdf (Página 199)

CHAPTER 16

2-channel Option BZ-7229

187

16.6.1 Controlling the Measurement

The measurement is controlled in the same way you would control a single-channel Logging or

Enh. Logging measurement. See Chapter 11 and Chapter 12 for more details.

The two channels are controlled and measured simultaneously, thus some of the housekeeping

parameters are common for the two channels, e.g., Start Time and Elapsed Time.

16.6.2 Displaying the Results

The results are displayed as bar graphs and measurement parameters on the Measurement screen in

three views: Profile, Spectrum or Broadband, by selecting the appropriate tab.

See Chapter 11 for more details on Logging displays and Chapter 12 for more details on

controlling Enhanced Logging displays.

16.6.3 Saving Results

Measurements are saved and can be opened later in the same way as described for Logging in

Chapter 11 and Enhanced Logging in Chapter 12.

16.7 Setting Up 2-channel Signal Recording

Signal Recording in the 2-Ch. templates is set up in the same way as in the single channel

templates (Chapter 13), with the following additions and changes:

1) The Recording Channel parameter can be set to Ch.1, Ch.2 or Both.

Choose Both to record both channels simultaneously.

2) The Recorded Signal parameter is set to Input Z-weighted and cannot be changed.

The Recorded Signal parameter is not displayed in the setup.

3) If Automatic Gain Control set to Off, the Peak Recording Level is automatically set to

highest possible setting, e.g., 145 dB for Range Setting = High Range and 115 dB for

Range Setting = Low Range when using Type 4189 microphones.

The Peak recording Level parameter is not displayed in the setup.

2-channel recordings are played back in the headphones as a stereo signal.

Use Measurement Partner Suite BZ-5503 to play back the 2-channel recordings either as a

stereo signal or as two mono signals, one for Ch.1 and one for Ch.2.

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B&K 2250 Light Manual do Utilizador Página 199