Arrakis Systems X-mixer-14-22 Operations Instructions download pdf (Page 69)

SPECIFICATIONS & TESTING

Arrakis Systems, inc. --- 6604 Powell st., Loveland, CO 80538 --- 970-461-0730 --- www.arrakis-systems.com

5-4)

5.4

CROSSTALK

5-4a) DEFINITION

Crosstalk is a measure of the amount of signal that bleeds from one audio chain into

another. Problems occur when producing two separate programs on a console at the

same time or when cueing during programming. If audible crosstalk occurs, then ON

AIR integrity can be compromised or a recording can be effected.

5-4b) TEST

Apply a test tone to one audio chain, such as Audition Left & Right. Measure, with a

millivoltmeter, how many dB down (from the applied signal) the signal appears in

another audio chain, such as Program Left or Right.

5-4c) CONSOLE PERFORMANCE

Crosstalk takes place in two basic ways. The first is capacitive crosstalk which

increases by 20dB for a ten times increase in frequency. The worst case frequency

for this type of crosstalk is therefore 20kHz. the second type of crosstalk is power

supply related where ground between two circuits is modulated by heavy currents.

Ground modulation crosstalk tends to be of a low frequency nature and sounds like

ordinary audio while capacitive crosstalk is predominantly high frequencies and

sounds ‘tinny.’

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Arrakis Systems X-mixer-14-22 Operations Instructions Page 69