FLEX-6400/FLEX-6600 Hardware Reference Manual
Page 5 of 45
Copyright 2018 FlexRadio Systems. All Rights Reserved.
1 INTRODUCTION
1.1 WELCOME
Thank you for purchasing the FLEX-6400/FLEX-6600 direct sampling software defined
radio (SDR) from FlexRadio Systems. The FLEX-6400 and FLEX-6600 are top performing
HF/6m transceivers that make use of the latest SDR technology using direct digital
sampling at the RF input for exceptional performance and distortion free reception.
Direct sampling technology eliminates analog mixing and amplification to minimize
spurious output and in-band intermodulation distortion to ensure ultra-clean RF
transmission.
The FLEX-6400 and FLEX-6600 along with the SmartSDR software “ecosystem” represents
the ultimate operating experience for amateur radio operators.
1.2 MANUAL LAYOUT
The FLEX-6400/FLEX-6600 Hardware Reference Manual is designed as a guide for use
while installing, configuring, and integrating your FLEX-6400/FLEX-6600 into your amateur
radio station. This manual expands on the FLEX-6400/FLEX-6600 Quick Start Guide
regarding connection details and hardware configuration including basic connectivity
information for interfacing with the more common types of third-party hardware. It is
designed for use in conjunction with the SmartSDR Software User’s Guide. References to
the SmartSDR Software User’s Guide will be provided to assist you.
Throughout this manual, important references will be highlighted for your information
and safety. The following symbols and styles will be used:
! – WARNING: THIS MEANS THAT THERE IS A POTENTIAL SAFETY HAZARD IF THE RADIO
IS CONFIGURED OR OPERATED IMPROPERLY. PAY SPECIAL ATTENTION TO ALL “!”
WARNINGS.
Δ – CAUTION: This is a precautionary statement to acknowledge there is a risk to
damaging your radio or operating it in an unintended manner. Pay special attention to
the “Δ” symbol to get the most from your FLEX-6400/FLEX-6600.
I – Information: Important information will be highlighted with the “i” symbol. Read
these notes for helpful hints and details about your FLEX-6400/FLEX-6600.
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