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TEST PROCEDURES
7.6 Verify that the Input 1 Signal/Clip LED lights RED.
7.7 Measure the output level at the Line Out XLR connector. It should be >16dBu, +/-1dB.
8. Maximum Input Voltage Test
8.1 Set the Input 2 volume control to MAXIMUM (fully CW).
8.2 Apply a 1KHz, +6dBu signal to the Input 2 1/4” phone connector.
8.3 Measure the THD+N output level at the Line Out XLR connector. It should be < 0.1%.
9. Frequency Response Test
9.1 Set the Input 2 volume control to MAXIMUM.
9.2 Apply a 1KHz, -34dBu signal to the Input 2 1/4” phone connector.
9.3 Reference a dB meter to the output level at the Line Out XLR connector.
9.4 Sweep the audio input signal from 20 Hz to 20 kHz. Verify that the output level is
0 dB +/- 0.5 dB.
Input 2 RCA Jack Tests
The below tests use the Input 2 RCA jacks driven with a single-ended audio signal and the Input
2 volume control set to MAXIMUM with the EQ switch set to the FULL RANGE position.
Note: Connect only one RCA jack at a time for these tests.
The Line Output XLR jack is used for all readings. The Input 1 Volume control is set to MINIMUM.
10. Input 2 RCA Jacks Gain Test
10.1 Input 2 RCA jack to Line Out Balanced. Set the Input 2 volume control to MAXIMUM.
Note: The inputs to the Left and Right RCA jacks are summed internally. You will test each jack
individually in the following tests. Do not connect both jacks at the same time.
10.2 Apply a 1KHz, -23dBu signal to the Input 2 Left RCA jack.
10.3 Measure the output level at the Line Output XLR connector. It should be 4.7dBu, +/- 2dB.
10.4 Apply a 1KHz, -23dBu signal to the Input 2 Right RCA jack.
10.5 Measure the output level at the Line Output XLR connector. It should be 4.7dBu, +/- 2dB.
11. Maximum Input Voltage Test
11.1 Set the Input 2 volume control to MAXIMUM.
11.2 Apply a 1KHz, -3.0dBu signal to the Input 2 Left RCA Jack.
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