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Chapter 12
Signal Recording (Optional Module)
Signal Recording Option BZ-7226 allows you to record the input signal (typically sound) in
either 16-bit or 24-bit resolution during measurement. The signal recording can be controlled
manually or by using an external trigger signal. The recorded sound can be played back and
listened to using the optional Earphones HT-0015. Sound is recorded directly to a memory card.
With hardware version 4, sound can also be recorded to a USB memory stick.
The main benefit is that data is documented on-site and is therefore ready for post-processing
and reporting back at the office using Measurement Partner Suite BZ-5503 or other post-
processing software such as Evaluator Type 7820, Protector Type 7825 or Microsoft
®
Excel
®
.
Check the
About
menu to see whether you have the right license to run the Signal Recording
module. (The
About
menu is accessed from built-in help – tap
on the Shortcut Bar, then select
About
.) See Chapter 9 for instructions on installing the license for the Signal Recording Module.
12.1
With Sound Level Meter and Frequency Analysis
Software
You can use the Signal Recording facility together with the Sound Level Meter Software and
the Frequency Analysis Software. You can record the sound for the whole measurement period
or you can record sound for controlled parts of the measurement. The recordings are attached
to the project as annotations, named “Soundrec N”, where N is the number of the recording for
the project. (section 3.4 and section 6.3.3 for a description of how to use annotations.)
Note 1:
Signal recordings can only be done during measurements.
Note 2:
Signal recordings can only be done on projects saved on memory cards (or with
hardware version 4, from a USB memory stick).
12.1.1
Setting up the Analyzer
1) Select a
Sound Level Meter
project template or a
Frequency Analyzer
project template.
(see section 3.2.1 for more details on templates.)
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