Bose ToneMatch T4S - Page 40

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TEST PROCEDURE
7.3 Measure the THD+N level at the 1/4” TRS Main Output L and R jacks. It should be <0.05%.
7.4 Repeat steps 7.1 to 7.3 for the remaining inputs.
Aux Inputs 5/6 (T4S) or 9/10 (T8S)
8. Gain Test
8.1 Apply a balanced 1 kHz, +6.5dBu sine wave to the channel 5 AUX TRS input.
8.2 Measure the output level at the 1/4” TRS Main Output L and R jacks. It should be +12.5dBu
+/-0.5dBu.
8.5 Repeat steps 8.1 and 8.2 for the channel 6 AUX TRS input.
9. Frequency Response Test
9.1 Apply a balanced 1 kHz, +6.5dBu sine wave to the channel 5 AUX TRS input. Reference a dB meter
to the output at the 1/4” TRS Main Output L and R jack.
9.2 Change the input frequency to 20Hz. Measure the output level at the 1/4” TRS Main Output L and R
jacks. Verify that the output level is 0.0dBr +/-0.5dBr.
9.3 Change the input frequency to 20kHz. Measure the output level at the 1/4” TRS Main Output L and R
jacks. Verify that the output level is 0.0dBr +/-0.5dBr.
9.4 Repeat steps 9.1 to 9.3 for for the channel 6 AUX TRS input.
10. THD+N Test
10.1 Apply a balanced 1 kHz, +6.5dBu sine wave to the channel 5 AUX TRS input.
10.2 Measure the THD+N level at the 1/4” TRS Main Output L and R jacks. It should be <0.05%.
10.3 Repeat steps 10.1 to 10.3 for the channel 6 AUX TRS input.
XLR Main Outputs L and R (T8S only)
11. Gain Test - XLR Inputs 1 - 8
11.1 Rotate the channel 1 Trim control to maximum (fully CW). Apply a balanced 1 kHz, -41dBu sine
wave to the channel 1 XLR input.
11.2 Measure the output level at the 1/4” TRS Main Output L and R jacks. It should be +12.6dBu
+/-0.5dBu.
11.3 Repeat steps 11.1 and 11.2 for the remaining inputs.