4-8
Technical Description
4.2.7 Electronically Controlled Volume
4.2.7 Electronically Controlled Volume
4.2.7 Electronically Controlled Volume
4.2.7 Electronically Controlled Volume
4.2.7 Electronically Controlled Volume
The receiver's sound volume on the handset is controlled by the M62429FP
(IC706).
4.2.8 Off-Hook Detection Relay
4.2.8 Off-Hook Detection Relay
4.2.8 Off-Hook Detection Relay
4.2.8 Off-Hook Detection Relay
4.2.8 Off-Hook Detection Relay
The reed relay ORD213 (RL701) detects the On/Off Hook State of the
handset.
4.3
4.3
4.3
4.3
4.3 External Speaker Circuit
External Speaker Circuit
External Speaker Circuit
External Speaker Circuit
External Speaker Circuit
4.3.1 Outline
4.3.1 Outline
4.3.1 Outline
4.3.1 Outline
4.3.1 Outline
The cradle relays signals between and the handset and the rest of the
equipment, makes a sound upon receiving a call, and monitors the calling
voice signal.
4.3.2 Power Supply System
4.3.2 Power Supply System
4.3.2 Power Supply System
4.3.2 Power Supply System
4.3.2 Power Supply System
+13.6 VDC is supplied as the main input source. The following voltages
are supplied for the internal components:
• +13.6 VDC for the speaker amplifier
• +5 VDC from the voltage regulator (IC804) for controlling the analog
switch
• +2.5 VDC (VTH) for operating bias-voltage for voice signals
4.3.3 Monitor Speaker Amplifier
4.3.3 Monitor Speaker Amplifier
4.3.3 Monitor Speaker Amplifier
4.3.3 Monitor Speaker Amplifier
4.3.3 Monitor Speaker Amplifier
A 5W/4
Ω
output TDA1905 (IC802) is used for the speaker amplifier to
implement an output of 2W/4
Ω
.
4.3.4 Sound Volume Control
4.3.4 Sound Volume Control
4.3.4 Sound Volume Control
4.3.4 Sound Volume Control
4.3.4 Sound Volume Control
Sound volume is adjusted by the Volume Controller (VR801).
Upon receiving a DSC (Digital Selective Calling), a sound is produced at
the maximum level regardless of the sound volume value set by the volume
controller (VR801).
Summary of Contents for RAY230E
Page 1: ...RAY230 RAY230E Fixed Mount VHF Radio Owner s Handbook Document number R49006_1 Date May 2001...
Page 2: ......
Page 7: ...vii Declaration of Conformity goes here...
Page 102: ...3 80 Operations...
Page 138: ...6 16 Parts List and Drawings...
Page 150: ...7 12 Appendix...
