IBM 770 ユーザーズマニュアル
Audio Port Specifications
Audio Output:
–
⅛
-inch mini-jack for headphone
– Headphone speaker output: 22 mW (32 ohm) maximum
– Maximum output level: 2.4 V pp
– Output impedance: 75 ohm
– Maximum output level: 2.4 V pp
– Output impedance: 75 ohm
Audio Input:
–
⅛
-inch mini-jack for microphone or line input
– Microphone gain: 26-dB minimum, 48.5-dB maximum
– Maximum input level:
– 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