B&K 2250 Light Instrukcja Użytkownika Pobierz pdf (Strona 72)

Hand-held Analyzer 2250 Light – User Manual

8.1.5 Headphone Settings

The headphone settings allow you to control the output to the headphone socket on the

connector panel.

You can listen to the measured signal for monitoring purposes. Select between A/B-weighted,

C-weighted or Z-weighted. (A/B-weighting is determined by setting the parameter in Setup >

Frequency Settings > Broadband (excl. Peak)).

The measured signal covers approximately 120 dB (from approximately 20 dB to 140 dB with

a Type 4950 microphone of nominal sensitivity). The output of the headphone socket covers

approximately 75 dB. Use the gain settings for the measured signal to adjust the output level to

suit the listening conditions. If the signal has a very high dynamic range (or the levels are

unknown), you can set Automatic Gain Control to On – this will convert the 120 dB input

range to 40 dB output range enabling you to hear signals of any level clearly.

Gain settings are provided for the measured signal. Tap on the gain parameter and use the

keypad to enter a new setting. Use ‘@’ to assign the new value for immediate response at the

output – or use the up/down navigation keys to increment/decrement the value.

Note 1: A 0 dB gain on the measurement signal means you get a 1 V output for a 1 V input

(when the measured signal Automatic Gain Control is set to Off).

Note 2: In hardware version 4 while playing back an annotation, you can use the Up/Down

navigation keys to increase/decrease the gain of the annotation.

Note 3: If you do not want to listen to the input signal, then set the Listen to Signal parameter

to No, to economise on power.

8.1.6 Printer Settings

You can make screen dumps on a printer connected to the analyzer using a standard USB cable,

or on hardware versions 1 – 3, the supplied Adaptor AO-0657. Use the Printer Settings to

select your preferred printer.

When a printer has been selected under the Printer Used parameter, then the Print Screen

command in the Main Menu list appears. Use this command to print a screen dump of any

screen on the analyzer.

The printer must either be a mobile thermal printer (from AM Tech or Seiko) or accept the

PCL

printer language.

• MPS: Mobile Pro Spectrum – a mobile thermal printer from AM Tech (www.amteq.co.kr)

• PCL: printers accepting PCL printer language

• PCL Inkjet: suitable for Inkjet printers and supports colour printing

• PCL Laser: suitable for laser printers

• Seiko DPU: DPU-S245 or DPU-S445 – mobile thermal printers from Seiko Instruments

(www.seikoinstruments.com)

PCL is the Printer Control Language developed by Hewlett-Packard (see www.hp.com). For

PCL printers, you can use the Top and Left Margin parameters to position the print on the

paper, and use Width and Height parameters to set the size of the print.

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B&K 2250 Light Instrukcja Użytkownika Strona 72