HBK Bruel & Kjaer 3670-A-082, User Manual

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CHAPTER 3
Set Up the Instrument’s Audio Device
17
3.2.1 The Control Panel
Fig.3.6
Control panel settings
At the top of the display, the active device can be selected. The default is
BKSV USB Audio ASIO
Driver
, which is the USB Audio Driver you have installed.
Set the
Sample rate
:
96000
,
48000
,
24000
or
12000
. The anti-aliasing filter in Type 3670 is only
valid with
96000
. If you edit this setting, you will need to restart (click
Start
) to apply the change.
The
Buffer size
is displayed but cannot be changed from the USB Audio Tool (edit in the USB Audio
Driver).
3.2.2 Input
Fig.3.7
Input settings
In the Input section, you can select:
•
Channels: 1
to
8
Total number of input channels included in the analysis
•
Autospectra
or
Freq. Resp.
The type of input
•
Hanning
,
Flat Top
or
None
The weighting function
•
Linear
,
Exponential
or
Peak
The type of averaging
•
FFT Lines
:
64
,
128
,
256
,
512
,
1024
,
2048
or
4096
The number of FFT lines/samples in the time record. If you edit this setting, you will need to restart
(click
Start
) to apply the change
•
Averages
:
1
to
100
The number of averages in steps of 1
•
Fullscale (V)
:
0.100
to
10000
Only visible when
Gain Adjust
is enabled in the View menu at top
Generally, you can edit the parameters at any time.