Intraplex VF-40 Voice Module
2 – Functional Description & Setup
Version 1.11
2-18
GatesAir
Intraplex Products
Figure 2-5. TIA-603C Emphasis Measurement
The audio frequency response from 300 Hz to 3000 Hz does not vary more than +1 dB or -3 dB from
a true 6 dB per octave pre-emphasis characteristic as referenced to the 1000 Hz level. The exception
to this variation is from 500 Hz to 300 Hz, where an additional 6 dB per octave roll-off is allowed.