User Guide

After Sales
Technical Documentation
Compact Handsfree Unit PHF–2
Page 8 Original, 11/94
Control Signals
Table 5. Control Signals (DC–values)
PIN/
CONNECTOR
LINE SYMBOL MINIMUM TYPICAL/
NOMINAL
MAXIMUM UNIT/NOTES
X400/2 M2BUS 0 5 Vdc
X400/3 PHFS 3.6
0
5.2
0.7
Vdc (speaker on)
Vdc (speaker off)
X400/4 GND (logic) 0 Vdc
X400/5 AGND (audio) 0 Vdc
X400/6 XEAR/HFJPWR 1 2.5 4 Vdc
X400/7 XMIC/JCONN 0 10 Audio–Vdc
X400/8 AGND (audio) 0 Vdc
AC Characteristics
Table 6. Audio Levels
LINE SYMBOL TYPICAL/NOMINAL UNIT/NOTES
XMIC Cable level 200 mV rms
XEAR Cable level 130 mV rms
Table 7. Audio Gains
LINE SYMBOL TYPICAL/NOMINAL UNIT/NOTES
HF–microphone amplifier gain 40 dB
HF–speaker amplifier gain 27 dB
Table 8. Audio Specifications
ITEM MINIMUM TYPICAL/
NOMINAL
MAXIMUM UNIT/NOTES
HF–Speaker: SPL 78 80 82 dB/1W/1m
Speaker output power 3.0 W
XEAR input impedance 10 kohm at 1kHz
XMIC output impedance 2.0 kohm at 1kHz