SP395 SoundPro Audio Integrator Form7492 Operation Manual
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5. Transmission Loss Test Frequency – Indicates the frequency used to test the dB loss of
the cable.
6. Analog Test Results 20 kHz- This shows the results of the 20 kHz transmission test. The
numbers are the dB attenuation loss through the cable. Better cables show readings closer
to 0, indicating no signal attenuation. For most audio cables, the 20 kHz levels should be
less than 0.5 dB. Unequal response or a large difference in dB loss values between1kHz
and 20 kHz indicates a bad cable or a faulty solder connection.
7. Polarity Test Result – Briefly indicates results of polarity test as “Correct” or
“Incorrect.”
8. Cable Test Analysis – Indicates result of cable polarity test indicating “Passed” or
“Failed.”
Cable Tester Operation
1. Select Cable Test: Select the Cable Tester listing in the SP395 sub-menu.
2. Select Cable Type: Select the cable type from the sub-menu. Microphone cables are
BAL >BAL, while guitar cables are UNBAL>UNBAL.
Note: The output and input connectors on the SP395 side panels are clearly marked for
the cable test. Be sure to use the connectors that are labeled “Cable Test”.
3. Start the test. Highlight and click the Test Status field and click to begin the test. The
field displays "Test Running" while the test is in progress and "Run Test" when
completed
4. Analog Test Result Next, an analog audio test is performed, running 1kHz and then
20kHz through the cable. The drop in transmission levels are shown for each frequency.
A good patch cable will have typical values of 0.0dB to -0.3 dB for both frequencies.
Note: Longer audio cables will have additional attenuation.
5. Polarity Test After the analog test, a polarity test is run. This test checks the cable for
improper wiring. During the test a “Correct” or “Incorrect” indication is briefly
displayed. After the test runs, the word “Passed” or “Failed” appears, and the speaker
beeps if the cable is good, or buzzes momentarily if it is bad.
Note: The SP395 uses XLR pin 2 hot. If your system is wired pin 3 hot, you will get wrong
results. A simple way around this is to use an unbalanced output, either the RCA output or the
¼" output with an unbalanced ¼" plug.
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