User manual

APPENDIX A
Setup Parameters
223
Input Top Socket
Rear Socket
Determines whether the input is taken from the Top
socket or the Rear socket ('Input' on connector
panel). Connect your transducer to this socket
Note: Sound Field and Windscreen corrections can
be added to both the Top Socket and the Rear
Socket (Input parameters). However, be careful that
you do not add a 'double' correction – for instance, if
you have recorded the signal from the Output
socket on a tape recorder, and later want to re-
analyse the recording via the Rear socket. In this
case you should set Microphone Type to Unknown
on the Transducer menu for the used transducer,
when using Rear Socket Input
Sound Field Correction Free-field
Diffuse-field
Select a correction matching the sound field of your
measurements, that is, you can make correct
measurements in a diffuse-field using a Type 4189
or 4190 free-field microphone, by selecting Diffuse-
field correction. Even Free-field correction of a free-
field microphone will enhance the overall frequency
response of the system. Generally, ISO requires
free-field conditions and ANSI requires diffuse-field
conditions. Check your local standards for the
setting you require.
No correction is made for unknown transducers.
Available for Microphone input only.
Windscreen Auto Detect On
Off
Automatic detection of Windscreen UA-1650 when
mounted on Microphone Preamplifier ZC-0032. The
preamplifier should be connected to the top socket,
if necessary using a microphone extension cable.
This parameter is available for microphone types
using ZC-0032 only
Windscreen Correction None
UA-1650
UA-1404
If Windscreen Auto Detect is set to Off, you can
manually select a windscreen correction suitable for
the windscreen in use. Correction is automatically
made for the windscreen on Types 4952 and 4184-
A. No correction is made for unknown transducers.
Available for Microphone input only.
Range Setting Low Range
High Range
Select Low Range or High Range for input channels.
Note: Press the Manual Event button to Autorange
the setting.
High Range will select a range with 0 dB gain,
which allows the highest possible input.
Low Range will select a range with 30 dB gain.
(available in Type 2270 2-channel templates only)
*. Requires Frequency Analysis Software BZ-7223
†. Not available in Reverberation Time Software BZ-7227
Table A.1 (Cont.) Input parameters
Parameter Values Comment