User manual

CHAPTER 2

Assembling your Analyzer

1) Measurement Microphone: A Brüel & Kjær Prepolarized Free-field ½ Microphone is

used. A robust and reliable microphone with a wide frequency range.

2) Preamplifier: Used to convert the high-impedance output of the microphone to low

impedance, suitable for driving long extension cables. The arrow points to the

preamplifier’s built-in windscreen sensor

3) (Manual Event Pushbutton): This allows you to manually indicate events during a

measurement. Using BZ-7222 and BZ-7223 software you can control signal recording

(this requires a license for the BZ-7226 option), and using BZ-7224 Logging Software or

BZ-7225 Enhanced Logging Software you can insert an Event Marker and control

recordings (the latter requires a license for the BZ-7226 option). In Type 2270 this button

can also be used to capture images.

4) (Commentary Pushbutton): This allows you to add recorded audio messages to your

measurement files.

5) , , , (Navigation Pushbuttons): These move the active screen component

(Field Selector) and navigate the user interface.

6) (Back-erase Pushbutton): This allows you to erase the last 5 seconds of measurement

data or to insert an Exclude Marker (BZ-7224 Logging Software or BZ-7225 Enhanced

Logging Software only).

7) (Accept Pushbutton): This allows you to accept any changes you make to the analyzer’s

setup.

8) (Reset Measurement Pushbutton): This allows you clear the current measurement

from the screen.

9) (Start/Pause/Continue Pushbutton): Press this to start, pause or continue with a

measurement.

10) (Status Indicator): The red, yellow or green lights, (or LEDs), referred to as the

‘Traffic Light’ either side of the Start/Pause pushbutton, indicate important states of the

analyzer during operation, that is, measurement stopped, paused or running. See Chapter 4

for further details.

11) (Save Pushbutton): This allows you to save measurement results.

12) Display Screen: A high-contrast, colour, touch-sensitive screen.

13) (Main Menu Icon): This calls up the Main Menu, which allows you to navigate

immediately to all the main functions of the analyzer, such as Setup, Explorer (or Data-

browser), Preferences, and the Calibration procedure.

14) (Power-on Pushbutton): Turns the analyzer on and off. If held in for 1 second, the

analyzer goes into standby mode; if held in for more than 4 seconds, it turns the analyzer off.

15) Stylus: Stored in a holder on the side of the analyzer, for use on the touch-sensitive screen.

You can choose to use the stylus or the hardkeys, depending on your preference and the

measurement situation. (Also see section 4.4.5.)