5.
Inspection with BRIDGE mode
Condition:
• Perform each test item in this section with the bridge test mode of the test program. (See “TEST PROGRAM 4-16.
BRIDGE test”)
•
Connect individually the 16 Ω load resistor to channel 1 and channel 3 output terminals.
•
Keep the measurement reference of the measuring instrument in floating condition and connect it to the middle point of
each load resistor.
•
Do not connect any resistor to channel 2 and channel 4 output terminals.
•
The input terminals and output terminals of channel 2 and channel 4 are not used in this section.
5-1. Gain
Input the 1 kHz, 0 dBu sine wave to each input terminal and check that the output voltage obtained at each output terminal
is +34.1 ±1.2 dBu.
5-2. Frequency
response
Perform the following test at each channel.
Input the 10 Hz, 1 kHz, 20 kHz, 0 dBu sine wave to the input terminal and one by one measure the output voltage obtained
at the output terminal for each frequency.
Confirm the output voltage at 10 Hz is 0 ±0.5 dB when compared with the output voltage at 1 kHz (0 dB).
Confirm the output voltage at 20 kHz is +0.5 ±0.5 dB when compared with the output voltage at 1 kHz (0 dB).
6.
Confirming operation of NX-DFLT card
Turn off the power, and insert the NX-DFLT card into the expansion slot. Turn on the power, and confirm that an indicator (LED)
of the NX-DFLT card lights.
Turn off the power.
Note: Be sure to turn off the power before inserting the NX-DFLT card.
NXAMP4x4
82
Содержание NXAMP 4X4
Страница 48: ...B B NXAMP4x4 48 CONTROL Circuit Board Pattern side パターン側 2NA WR77020 10 0 ...
Страница 49: ...B B NXAMP4x4 49 CONTROL Circuit Board Pattern side パターン側 2NA WR77020 10 0 ...
Страница 51: ...NXAMP4x4 51 OUTANH Circuit Board Pattern side パターン側 2NA WJ97320 10 0 ...
Страница 54: ...B B NXAMP4x4 54 PN AN Circuit Board Pattern side パターン側 2NA WJ97170 10 2 ...
Страница 55: ...B B NXAMP4x4 55 PN AN Circuit Board Pattern side パターン側 2NA WJ97170 10 2 ...
Страница 59: ...B A NXAMP4x4 59 PSANHA PSANHB Circuit Board Reduction 7 10 Component side 部品側 2NA WJ97350 70 3 ...
Страница 60: ...B B NXAMP4x4 60 PSANHA PSANHB Circuit Board Reduction 7 10 Pattern side パターン側 2NA WJ97350 70 3 ...
Страница 63: ...Expansion slot NXAMP4x4 63 NX DFLT Circuit Board Pattern side パターン側 Component side 部品側 2NA WT66120 10 0 ...