1. Measurement Conditions
1-1. Environment
• Normal temperature: From 10 ˚C to 35 ˚C
• Normal humidity: From 45 % to 85 %
1-2. Power Source
• When measuring the electrical characteristics, set the power supply voltage and frequency as specified in the table
below.
1-3. Measuring Instruments
• Use a reliable measuring device capable of precisely measuring the specification values indicated in this document.
• Input impedance of the measuring instrument should be more than 1 MΩ.
• The noise level should be measured with a 22 Hz-22 kHz band pass filter.
When you use the Audio Analyzer System made by Audio Precision, Inc. for noise measurement, set the filter
characteristics as follows.
BW : 22 Hz-22 kHz
Filter (Fltr) : None
1-4. Connections
Each input and output terminal of channels 1-4 are as shown in the figure below.
1-4-1. Input connector
XLR-3-31 (female) type connectors are used for input terminals in channels 1-4.
Condition : Balanced input
Wiring : pin 1 to ground, pin 2 to hot (+), pin 3 to cold (-)
1-4-2. Output connector
Neutrik SPEAKON connectors are used for output terminals in channels 1-4.
Connect a load resistor between pin 1+ and pin 1- of the Neutrik SPEAKON connector.
1-4-3. Load resistor
Use a load resistor with no inductivity and a power rating high enough to perform each test safely.
1-4-4. Link out connectors
XLR-3-32 (male) type connectors are used for input terminals in channels 1-4.
Condition : Balanced output
Wiring : pin 1 to ground, pin 2 to hot (+), pin 3 to cold (-)
Fig. 1
■
INSPECTIONS
Destination Power supply voltage Frequency
U 120 V +2/-0 % 60 Hz
CHN 230 V +2/-0 % 50 Hz
Ch4
OUT
Ch3
OUT
Ch2
OUT
Ch1
OUT
Ch4
IN
Ch4
LINK
OUT
Ch3
LINK
OUT
Ch2
LINK
OUT
Ch1
LINK
OUT
Ch3
IN
Ch2
IN
Ch1
IN
NXAMP4x4
78
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