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Second generation Texas Instruments TMS320C25 processor.
8kHz sampling rate
Internal digital input and output gain processing, filtering
|TRANS-HYBRID LOSS|| >40dB with pink noise or voice as test input
All dynamic enhancement processing is switched off.
With the override and output expander functions switched in, trans-hybrid loss is enhanced to >50dB.
|SEND LEVEL TO PHONE LINE|| -10dBm average level
Maintained by internal digital AGC
|FREQUENCY RESPONSE (CALLER TO OUTPUT)||200 – 3400Hz, ±1dB|
|NOISE AND DISTORTION (CALLER TO OUTPUT)|| Distortion: Typical 0.4% THD+N, measured @ 1kHz at any level from -48dBm to -8dBm
Signal-to-Noise: >72dB referenced to 0dBm phone level
|SEND AUDIO INPUT|| XLR female connector. Active balanced
Accommodates -24dBm to + 12dBm levels in LINE mode; -68dBm to -35dBm in MIC mode.
Front panel screwdriver level adjustment
|CALLER AUDIO OUTPUT|| XLR male connector. Active differential.
Output levels to +14dBm depending upon caller telephone line level and adjustment of front panel level adjust.
Drives 600 Ω.
|AUX/MIX OUTPUT|| XLR male connector. Active differential
In AUX mode, this output is an isolated second output.
In MIX mode, this is a combined send and caller output.
Input to Mix output: Unity gain. <0.04 % THD; +