31
MW10
4.
Inspections for USB Assembly
4.1
Scope
This inspection specification is appled to the USB assembly (WG644500).
4.2
Power Source
Measure by using Regulated DC Power Supply with two outputs of “+15V 0.1A or more” and “-15V 0.1A or more”.
4.3
Preparation
* Application software of “USB AUDIO”
Use the software that can be set as follows.
(Cubase LE, TWE, etc. Reffer to page 32 for the example in the Cubase LE Windows version.)
Sampling rate----48kHz or 44.1kHz
Resolution --------16 bits
* Input impedance of measuring instrument is more than 100k ohms.
* Input signal
Unless otherwise specified, the input signal shall be high quality sine wave.
* Input/Output
L Input
: CN101-5pin
R Input
: CN101-6pin
L Output
: CN101-2pin
R Output
: CN101-3pin
+15V
: CN101-7pin
-15V
: CN101-9pin
GND : CN101-8pin
USB D+
: JK101-3pin
USB D-
: JK101-2pin
USB GND
: JK101-4pin
USB VCC
: JK101-1pin
* Connection
Connect them as shown in Fig.4.3-1.
(Fig.4.3-1)
Regulated DC Power Supply
+15V
GND
-15V
L Input
R Input
L Output
R Output
TP101
JK101
CN101
USB assembly (WG644500)
Personal Computer
DC Voltmeter
V
7
8
9
5
6
2
3
CONNECTION DIAGRAM
PC
