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USB output (digital data output at any time) Detailed description
1. How to set (in Menu <System> (1/3))
OFF
:
USB out(digital data output) OFF
Lp
:
Instantaneous values are output every second.
LpB
:
When using the octave filter, the level numerical data of each band is outputted
every 8msec.
Necessary the
1/1 and 1/3-octave Real-time Analysis Card(NA-0038)
Wave
:
A/D values are outputted every 48kHz
2. Using interface
1) USB
:
IC chip (FT245)
2) Transfer speed
:
9600
~
921600bps
3) Data length
:
8bit
4) Stop bit
:
1bit
5) Parity check
:
none
3. Output details
3-1 Lp(Instantaneous values every second)
1)
Required baud rate
:
9600bps
2)
Data Contents
:
5Byte+CR
<
ex. 43.0dB
→
20 34 33 2E 30 0D (43.0+CR)
>
3-2 LpB(Level value for every 8msec in each band
)
1)
Required baud rate
:
460800bps or 921600bps
2)
Data Contents
:
Case of 1/3
-octave
130.0+CR+LF
←
12.5Hz
130.0+CR+LF
←
16Hz
・
Total 34 data
・
130.0+CR+LF
←
All pass
130.0+CR+LF
←
Over all
+CR+LF
←Brake code
130.0+CR+LF
←Next data
(
12.5Hz
)
3-3 Wave
(
16Bit binaryA/D waveform data
)
1)
Required baud rate
:
921600bps
2)
Data Contents
:
Continuous output of waveform every 48kHz
(
20.8us
)
0000
~
FFFF
(
0000
→
Negative max,8000/7FFF
→
center, FFFF
→
Positive max
)
<System> 1/3
Mode
:Normal
Data delete:off
LCD cont :*****
Date y/m/d :00/00/00
Time h/m/s :00:00:00
Printer(PC)set:9600
USB out :OFF
OFF → Lp → LpB → Wave → OFF
※
Output value is started/stopped at the same time as measurement by
[
Start/Stop
]
key input.
It is output at any time regardless of Interval and MeasTime.
Содержание 6236
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