112
10. Gain (GV=+32dB) Test
10.1 In the CSD window, double-click on the Analog In 1 block to open the
Input Control Panel. Using the pull-down menu, change the pre-gain setting
to +32dB for Inputs 1 - 4. Apply a balanced 1kHz, -28dBu sine wave with a
22Hz/22kHz Low Pass Filter and A-weighting to the IN1 analog input.
10.2 Measure the output level at the OUT1 analog output. Verify that it is
between +3.0dBu and +5.0dBu. Repeat for Inputs 2 - 4.
11. Noise Test
11.1 Set up the unit under test as described in test 10 above. Turn off the signal generator output.
11.2 Measure the output noise at the OUT1 output using a 22Hz/22kHz Low Pass Filter and A-weighting.
Verify that the measured output noise at the OUT1 connector is <-84dBu.
12. Gain (GV=+44dB) Test
12.1 In the CSD window, double-click on the Analog In 1 block to open the
Input Control Panel. Using the pull-down menu, change the pre-gain setting
to +44dB for Inputs 1 - 4. Apply a balanced 1kHz, -40dBu sine wave with a
22Hz/22kHz Low Pass Filter and A-weighting to the IN1 analog input.
12.2 Measure the output level at the OUT1 analog output. Verify that it is
between +3.0dBu and +5.0dBu. Repeat for Inputs 2 - 4.
13. Noise Test
13.1 Set up the unit under test as described in test 12 above. Turn off the signal generator output.
13.2 Measure the output noise at the OUT1 output using a 22Hz/22kHz Low Pass Filter and A-weighting.
Verify that the measured output noise at the OUT1 connector is <-74dBu.
14. Frequency Response 20kHz Test
14.1 Apply a balanced 20kHz, -40dBu sine wave with a 22Hz/22kHz Low Pass Filter and A-weighting to
the IN1 analog input.
14.2 Measure the output level at the OUT1 analog output. Verify that it is between +3.0dBu and +5.0dBu.
15. Frequency Response 20Hz Test
15.1 Apply a balanced 20kHz, -40dBu sine wave with a 22Hz/22kHz Low Pass Filter and A-weighting to
the IN1 analog input.
15.2 Measure the output level at the OUT1 analog output. Verify that it is between +3.0dBu and +5.0dBu.
16. Total Harmonic Distortion + Noise (THD+N) Test
16.1 Apply a balanced 1kHz, -40dBu sine wave to the IN1 analog input.
TEST PROCEDURE
To Next Page
Loading...
Need help?
General
