SP395 SoundPro Audio Integrator
Form7492
Operation Manual
81
Crosstalk Meter
The Crosstalk Meter measures the amount of isolation that exists between two audio sources,
such as a right and left audio channel. Crosstalk is further defined as the amount of signal that
crosses or bleeds from one channel into the other. It is measured in dB.
Crosstalk is measured by applying signal to only one of the channels of a piece of audio
equipment or a cable. The output channels from the equipment or cable output is applied to the
left and right Crosstalk Meter inputs. The level difference in dB between the channel with signal,
and channel without signal is the measured crosstalk. There should be little if any crosstalk,
resulting in very large crosstalk dB values. For example if 1/1000 of the voltage leaks into the
non-signal channel, the crosstalk is 60 dB.
Crosstalk Meter display and control
Test Function –
Identifies CrossTalk Meter (Xtalk) as the current test function.
1.
Reference Channel –
Selects the reference waveform in which the CrossTalk Meter
calculates the level difference (+dB, -dB).
2.
Left Input Level uV
– Displays the measured input level on the left channel input.
3.
Right Input Level uV
– Displays the measured input level on the right channel input.
4.
Crosstalk Measurement Value
– Displays the measured crosstalk level, in dB, between
the selected reference and the other or second input.
Crosstalk Meter Operation
1.
Set up the inputs:
Select the CrossTalk Meter function. Turn off the phantom power to
each input in the top Toolbar. Turn on auto-gain,
2.
Connect two audio inputs, such as a left and right audio channel outputs from an audio
device, system or cable.
Note: Any two audio signals may be compared and a level
difference measured as a crosstalk value.
3.
Set up the output:
Connect the SP395 output to only one channel input of the device or
cable under test.
4.
Pick the reference channel:
Select a reference channel for the CrossTalk meter within
the test screen. Select the channel that has the signal applied to it from the SP395.
5.
Read the results:
Read and confirm input levels to the SP395 to confirm proper
connection. Read the CrossTalk in dB.
