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SW-BA-e-2020
4.6.1 AC OUT
(alternating voltage output)
There are two analog outputs on the sound level meter:
DC output
and
AC output
.
Connect the
DC output
or
AC output
to the other device or system using coaxial
cables. The input impedance of the termination device or system should be
approximately 5 k
Ω.
The connection for the
AC voltage output is located on the
bottom of the sound level
meter. It outputs the signal from the microphone directly without any adjustment
possibility. The maximum output voltage is 5 Vrms (±7 V peak) and the maximum
output current is ±15 mA.
☆
Note : If the input resistance of the termination device or system is not high enough,
you will need to add an impedance matching circuit. The
AC output
can only be used
for noise recording or monitoring because the background noise is higher than the
lower limit of the linear measurement range of the sound level meter.
4.6.2 DC OUT
(direct voltage output)
The
DC voltage output
is used to output the analog DC voltage signal, which is
proportional to the measurement result with a ratio of 10 mV/dB. For example, at 93.8
dB the output will output 938 mV. This option is recommended for filtering or averaging
the output signal to eliminate noise.
The
DC output of
the level meter can set the signal output for the
level meter mode. Press the arrow keys <▲>
, <▼> , <◄> , <►>
to select
.
Filter
:
A
,
B
,
C
,
Z
(flat)
Detector
:
Fast
,
slow
,
Imp.
Mode
:
SPL
,
LEQ
,
Peak
1/1 Octave DC Out
defines the output signal in 1/1 octave mode.
The following options are available: LAeq, LBeq, LCeq, LZeq, 31.5
Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16
kHz. Press the arrow keys <◄>, <►> to select.
4.6.3 Printers
The Print
option allows you to set the printer to
print automatically or manually. If you select the
Auto
option, measurement results are printed
automatically after the measurement stops.