FlexRadio Systems FLEX-1500 Service Manual

Revision 1.0 10 Copyright FlexRadio Systems, 2010-2011
sent via the USB protocol to the controller, then transferred to the CODEC via I2S
protocol for conversion into analog baseband signals to drive the QSE up-mixer.
Audio Amplifier
An audio amplifier is present, capable of driving stereo headphones, or stereo powered
speakers, in the Stereo configuration, or a monophonic speaker directly, in the Mono
configuration. In stereo, each of the two amplifiers are carrying the appropriate left or
right channel information, and driving a low power amplifier suitable for headphones or
high impedance loads. In the Mono configuration, the two incoming stereo signals are
mixed together to form a single mono signal. This is fed to one amplifier directly and
inverted and fed to the other amplifier to form an “H-Bridge” speaker amplifier. In this
mode the speaker must be wired to bridge the amplifier output (connect to tip and ring on
stereo speaker plug) with no connection to ground.

FlexRadio Systems FLEX-1500 Specifications

General

Brand	FlexRadio Systems
Model	FLEX-1500
Category	Transceiver
Language	English