68
3.5 Page input (J116)
Input signal -40 dBV (10mV) @ 1KHz sine wave
Output level
Auxiliary Output -10.70 dBV ±0.5 dBV THD <0.1%
3.6 Front panel LEDs
Verify that the “Power On” LED is illuminated blue. Verify all other LED’s are off.
Veirfy that the signal and clip LED’s illuminate with the following signals applied to the corre-
sponding inputs.
3.7 Front panel PCB
Verify that the LCD display shows the following at start up:
Bose DXA 2120
Mixer Amp v1.0
3.8 Line input to speaker outputs.
Measure the following:
Gain, Frequency Points, THD, and Noise values for both Output channels.
TEST PROCEDURES
Signal Present Clip
Input 1 -49.6 dBV -12.5 dBV
Input 2 -49.6 dBV -12.5 dBV
Input 3 -49.6 dBV -12.5 dBV
Input 4 -49.6 dBV -12.5 dBV
Output 1 -51.6 dBV -14.5 dBV
Output 2 -51.6 dBV -14.5 dBV
Page In dBV dBV
Direct In dBV dBV
Test Name Frequency Vin Vout Tolerance
Spkr Gain 1 KHz -30 dBV 16.5 dBV +/- 1 dB
Spkr Resp 1KHz 1 KHz -30 dBV 0 dBr +/- 0.1 dB
Spkr Resp 60Hz 60 Hz -30 dBV 0 dBr +/- 1.0 dB
Spkr Resp 300Hz 300 Hz -30dBV 0 dBr +/- 1.0 dB
Spkr Resp 5KHz 5 KHz -30 dBV 0 dBr +/- 1.0 dB
Spkr Resp 15KHz 15 KHz -30 dBV -2.0 dBr +/- 1.0 dB
Spkr THD 1 KHz -30 dBV 0.1% < .5%
Output Level THD
4 Ohm 14.50 dBV ±0.5dBV < 0.1 %
70V (49 Ohms) 24.50 dBV ±0.5 dBV < 0.1 %
100V (98 Ohms) 27.75 dBV ± dBV < 0.1 %
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