User Guide

After Sales
Technical Documentation
Handsfree Desktop Charger CHH–7
Original, 11/94Page 12
Table 18. Microphone Connector X440 / DC3H
PIN LINE
SYMBOL
PARAMETER MINIMUM TYPICAL/NOMINAL MAXIMUM
1 HFMIC HF Microphone
Output Voltage
(without load)
Input Impedance
4.7V
1.0kΩ
2 AGND analogue ground 0V 0V 0V
Mechanical Characteristics
Table 19. Mechanical Characteristics
UNIT DIMENSIONS (mm)
(W x H x D)
WEIGHT
(g)
NOTES
CHH–7: Colour: Warm Black
DCXH PCB
includes DC3H and DC4H
modules
155 x 1.6 x 94.5 PCB has 6 layers / 1.6mm
flex foil 65 x 9 System connector flex
DC4H–module: 50 x 1.6 x 22 PCB has 6 layers / 1.6 mm
User Interface Features
Charging takes place at a battery temperatures of between 5 and 45.
Control of the charging process for the phone is performed by a
microprocessor located inside the phone; control of the charging process
for the spare battery is performed by a separate microprocessor located in
the HF desktop charger. The phone is always charged first, followed by
the spare battery. When a spare battery is fitted, the temperature must be
less than 40       
A battery provides a larger capacity if it is occasionally discharged
completely. The user can do this by using the ‘deep discharge‘ feature.
This feature only operates with the spare battery slot. With the battery
located in the spare slot, the spare battery will automatically be
discharged and then re–charged to full capacity when the ‘discharge‘
–button is depressed. If this button is pressed twice the discharge
function is cancelled.