IBM 770 Laptop User Manual


 
Audio Port Specifications
Audio Output:
-inch mini-jack for headphone
Headphone speaker output: 22 mW (32 ohm) maximum
Maximum output level: 2.4 V pp
Output impedance: 75 ohm
Audio Input:
-inch mini-jack for microphone or line input
Microphone gain: 26-dB minimum, 48.5-dB maximum
Maximum input level:
Microphone: 1255 mV pp
Line In: 4.0 V pp
Input impedance:
Microphone: 47 k ohm
Line In: 30 k ohm
3-8 Subsystems