Directed Electronics | 6500HF | FLEX-6000 - WoodBoxRadio

FlexRadio Systems
Software Defined Radios
FLEX-6500 & FLEX-6700 HF/50MHz Transceivers &
FLEX-6700R HF/VHF Receiver with SmartSDRTM
Signature Series
Changing Ham Radio — Forever...
Introducing the
Signature Series
Transceivers with
are dynamically allocated full performance receivers that can
be directed to the speaker or headphones for listening, or can
be streamed as digitized RF to external digital applications.
Panadapters and Slice Receivers can be created and destroyed at
What distinguishes SmartSDR is the simplification of these
advanced concepts into an elegant graphical user interface
(GUI) that places you in complete control. Want to create an
additional Panadapter to watch for possible 10m band openings?
No problem, simply click to add the Panadapter and SmartSDR
directs everything from the advanced signal processing software
down to the filters in the SCU to form an optimized receiver. Want
to decode all of the CW signals on 40m while working DX on
20m? It’s just a few clicks away. In the future, remote FLEX-6000
Signature Series radios will be equal partners in the SmartSDR
Imagine a transceiver that changes Ham Radio —
ecosystem. Imagine the capabilities: Want to add two remote
receivers so you never miss another check-in as Net Control? Just
click to add and combine them.
FlexRadio Systems is changing the face of Ham Radio. It is not
often that a team of smart people are allowed to start with a clean
sheet of paper and dream. Imagine if we could take everything we
have learned in amateur, commercial and government markets and
build a new class of transceiver, virtually without limits. Imagine if
digital radio capabilities previously affordable only for commercial
and government applications were now cost effective for Ham
transceivers. Imagine a radio that will be a platform for dream
applications both today and in the future.
Imagine SmartSDR™
With the FLEX-6000 Signature Series radios, FlexRadio brings a
wealth of new capabilities to the amateur including direct digital
reception, transmission and networking. At the core of all these
Imagine complex things made simple...
new capabilities is SmartSDR. SmartSDR organizes all of the
signal processing power in the FLEX-6000 Signature Series radios
SmartSDR takes complex hardware and software and makes it
into an advanced reusable framework. First, the RF subsystems
elegant and simple to use. As smart phones and tablets have
in the FLEX-6000 are virtualized as reusable hardware blocks or
made computing devices accessible to the masses, the SmartSDR
Signal Capture Units (SCU) with specific capabilities. SmartSDR
architecture truly delivers on the promise of a Software Defined
understands the capabilities of each SCU and how to harness its
Radio for the masses.
Just as FlexRadio set the standard for visual radio interaction,
As data from the SCUs enters the Field Programmable Gate Array
SmartSDR sets a new bar for visual radio display and control.
(FPGA) at a combined rate of over 7.8Gbps, SmartSDR performs
Following the simple is better rule; we built a new graphical
advanced Digital Signal Processing (DSP) on the data, splitting it
interface that is easy to learn and use. Multiple high-resolution,
into individual Panadapters and Slice Receivers. Panadapters are
real-time spectral displays are at the heart of the SmartSDR
visual displays of the RF spectrum akin to a spectrum analyzer,
experience. Intuitive controls are hidden from view to minimize
but with more capabilities for the amateur. Slice Receivers
clutter yet are instantly available when needed.
Imagine digital starting at the
antenna connector...
The FLEX-6000 Signature Series achieves
the ultimate goal of RF to bits at the antenna
connector. Digital Down conversion (DDC) of the
signal at RF, virtually eliminates the performance
limitations inherent in legacy superheterodyne
roofing filter based transceivers. Gone is the
requirement for analog mixing and IF amplification
Graphical Interface
stages that add images and intermodulation
distortion. Eliminated is the need for expensive
The FLEX-6000 Signature Series was designed with plug-and-play
crystal roofing filters that add their own distortion and ringing.
installation as a requirement. There are no drivers or interface
Direct digital receivers are simply quieter and less fatiguing to
cards to install. Just plug the radio into an antenna, power supply
listen to over longer periods of time.
and network, load the SmartSDR software on your existing PC and
Imagine networking as forethought, not
Networking is at the heart of the new FLEX-6000 Signature Series
radios. From across the shack or across the world, these new
radios are designed with the latest networking capabilities.
Each FLEX-6000 Signature Series radio is equipped with a 1GbE
port for communication to existing PCs or other future display
platforms. Initial software enables operation within the home
network domain. Future releases will enable operation from any
Weak signals near the noise floor are easier to copy due to the
location in the world with an Internet connection. No external
elimination of in-band phase distortion inherent in crystal filters.
computer or expensive adapters are required at the radio site for
remote operation.
Since 100% of the receiver and transmitter mixing and filtering are
done in the digital domain, unwanted sideband suppression, filter
What about sharing radios
shaping, carrier suppression, and image rejection are no longer
with your buddy, team or club?
limited by non-linear analog circuits. Further, infinitely variable
SmartSDR future releases
brick wall digital filters allow precise interference elimination
enable multi-user sharing of radio
without added distortion.
resources at the station and
across the net. Imagine multi-multi
The FLEX-6700 and FLEX-6700R incorporate two independent,
contest and field day stations that
synchronous Analog Devices AD9467 16-bit 245.76 Msps (Mega
allow dynamic allocation of slice
samples per second) analog to digital converters (ADC) that allow
receivers from any workstation. Think of DX-peditions where
direct digitization of the RF spectrum.
isolated transmitters and receivers are connected to the operator’s
logging stations with only Ethernet cable. And club members will
Each of the two Spectral Capture Units allows simultaneous
be able to share the club station from their living room or pool side.
reception from their own respective antenna or the two can
be optimally combined to deliver increased dynamic range. In
addition, dual SCUs provide the capability for diversity reception,
FLEX-6500 is equipped with a single Spectral Capture Unit.
Imagine dynamic range so high it is no longer a
Not only is reception all digital; so is transmission. The FLEX-
Direct RF to digital conversion allows the FLEX-6000 Signature
6700 and FLEX-6500 transceivers incorporate an Analog Devices
Series to deliver up to +45 dBm (3rd Order Intercept Point) and
AD9122 16-bit digital to analog converter (DAC) operating at
110 dB IMD DR3 (3rd Order Dynamic Range) inside the final
491.52 Msps. Direct Digital Up Conversion (DUC) eliminates the
filter bandwidth. This means that the FLEX-6000 Signature
traditional analog mixing and IF amplification, thus maximizing
Series dynamic range is just as high at 100 Hz spacing as it is
carrier and unwanted sideband suppression while minimizing
at 2 kHz spacing. This lets you work the pileups with ease and
spurious output and in-band intermodulation distortion.
reduces auditory fatigue typically caused by in-band distortion in
beam steering, noise mitigation, and multi-antenna monitoring. The
crystal filter based radios. Legacy multi-conversion, roofing filter
Imagine up to 8 full performance receivers in one
architecture radios tend to “fold” and distort as the signal spacing
is reduced near or inside the final filter bandwidth. That is why
other manufacturers typically refer to dynamic range at wide
The FLEX-6700 transceiver and FLEX-6700R receiver each
tone spacing and some quote meaningless numbers without any
allow creation of up to 8 independent Slice Receivers providing
reference at all.
reception from 0.03 MHz to 77 MHz and 135 MHz to 165 MHz.
The FLEX-6500 allows creation of up to 4 Slice Receivers with
As 3rd Order Dynamic Range is increased, Phase Noise Dynamic
tuning from 0.03 MHz to 77 MHz. Each Slice Receiver can provide
Range (PNDR) becomes the dominant performance specification.
independent spectral display of up to 384 kHz.
Legacy multi-conversion radios must use frequency synthesizers
for tuning, which exhibit typically high in close-in phase noise and
spurious output. The FLEX-6000 Signature Series achieves world
monitor multiple frequencies within the same band or multiple
class PNDR through the incorporation of an ultra-low phase noise
bands. SO2R stations can chase multiplier frequencies while
master oscillator operating at 983.04 MHz. Clock drivers in the
holding down a run frequency using a single radio.
FLEX-6000 deliver phase noise performance better than -130 dBc/
Hz at 1 kHz offset, -146 dBc/Hz at 10 kHz offset and -152 dBc/Hz
Now it is easy to watch for band openings across multiple bands
at 100 kHz offset. This results in the ability to hear weaker signals
from anywhere on the network. What about monitoring repeaters
and provides a cleaner transmitted signal.
on 10m, 6m, and 2m at the same time? The possibilities are
Except for the most demanding large signal conditions, Slice
Receivers are free to operate in wide-band mode without the need
for RF pre-selection filters. This maximizes receiver flexibility with
minimal impact to overall
dynamic range. Optimally,
100W PA
when needed for increased
out of band rejection, 10
Ham band, band-pass
preselector banks are
available on each Spectral
Capture Unit. These filters
incorporate mechanical
relays and ceramic core
inductors virtually eliminating
FLEX-6000 Signature Series Hardware Architecture
Slice Receivers allow you to simultaneously visually and audibly
distortion that can be caused
by non-linear filter and
switching components.
In all but the quietest rural locations, preamplifiers are not needed
nor are they desired for typical HF operation. Since the FLEX6000 Signature Series ADCs are internally buffered, they can be
connected directly to the antenna thereby maximizing large signal
handling capability and spurious free dynamic range. Further, the
dual Spectral Capture Units can be optimally combined on the
FLEX-6700 and FLEX-6700R to increase Blocking Dynamic Range
The FLEX-6000 Signature Series incorporates a Xilinx® Virtex®-6
up to 3 dB and IMD DR3 up to 2 dB.
field programmable gate array (FPGA) that performs all digital
up and down conversion for spectral analysis. The FPGA works
When RF amplifiers are needed, all models incorporate an Analog
in tandem with a Texas Instruments™ DaVinci™ Digital Media
Devices ADL5201 Digital Variable Gain Amplifiers (DVGA) for each
Processor that includes a 1.4 GHz (1.2 GHz on FLEX-6500) ARM
Spectral Capture Unit that is optimal for HF through low VHF. The
Cortex™-A8 CPU with NEON™ floating point coprocessor. It
ADL5201 provides -11.5 dB to +20 dB of gain in 0.5 dB steps with
also includes a 1.2 GHz (1.0 GHz on FLEX-6500), 32-bit floating
a 7.5 dB noise figure and a typical output IP3 of up to +50 dBm at
point DSP coprocessor. The CPU incorporates 512 MB of
50 MHz. The 31.5 dB range of the DVGA’s digital input attenuator
1333 MHz DDR3 RAM, 1 Gbps Ethernet port and two USB 2.0
allows the system gain to be optimized for maximum dynamic
communication ports.
range for the given band conditions. The FLEX-6700 and FLEX6700R also include an Analog Devices ADL5534 +20 dB gain, 2.5
The DaVinci processor performs final digital signal processing,
dB noise figure, +39 dB output IP3 RF amplifier. On these models
Ethernet data communications, and radio control functions for
the ADL5534 can be switched in series with the ADL5201 DVGA
the radio. In addition, the radios incorporate two programmable
with an optimal attenuation setting to adjust the noise figure for
system on a chip processors for system management and control.
operation in the 135 MHz to 165 MHz range.
Imagine all digital QSK CW in hardware...
Imagine digital signal processing power that
enables the unimaginable...
The FLEX-6500 and FLEX-6700 transceivers utilize FPGA
hardware to directly generate the CW waveform digitally at the
The FLEX-6000 Signature Series packs more built-in digital
RF carrier frequency. This means that the RF carrier switches at
signal process power than ever before imagined in an amateur
hardware speeds without first element truncation as is typical in
radio transceiver. The FLEX-6700 and FLEX-6700R weighs
many radios. When combined high speed TR and bias switching
in at a massive 317 billion multiply-accumulate operations per
on the PA, <10 millisecond key down to RF output is achieved.
second (GMACs) and 121 billion floating point operations per
True FSK mark/space carrier is also digitally generated directly at
second (GFLOPS). The FLEX-6500 delivers 191 GMACs
the RF output frequency.
and 78 GFLOPS. This level of performance allows the FLEX6000 Signature Series to become a platform for amateur radio
Imagine FlexRadio’s Famous Audio Quality...
communication applications that were never before considered.
FlexRadio’s reputation for amazing quality audio continues
and is further enhanced with the FLEX-6000 Signature
Brand A
0.120 GFLOPS
Series. Direct digital up conversion and pure digital filtering
Texas Instruments TMS320VC33
Brand B
virtually eliminate transmit audio distortion. The FLEX-
Texas Instruments TMS320C6713 x3 + TMS320C6711
1.35 GMAC
6700 and FLEX-6500 incorporate a dedicated streaming
Brand C
audio DSP for low latency parametric equalization, RF
Texas Instruments TMS320C6727B x2
1.40 GMAC
audio compression, automatic level control, noise gating,
Texas Instruments TMS320C6A8167 + XC6VLX75T
FLEX-6700 / FLEX-6700R
Texas Instruments TMS320C6A8167 + XC6VLX130T
191 GMAC
and monitoring. Transmit audio bandwidth is continuously
adjustable up to 10 kHz for AM and Enhanced Single
317 GMAC
Transceiver DSP Performance Comparison
Sideband Modes.
Imagine a RF power amplifier that goes beyond
the norm...
>50 dB power measurement range with +1 dB linearity and >40 dB
range with much better than ±0.25 dB linearity. The ADL5519 also
provides hardware return loss calculation to allow real time SWR
A SmartSDR deserves a high performance RF power amplifier
display on modulated signals.
system designed to match. The FLEX-6500 and FLEX-6700
incorporate a push-pull pair of rugged RD100HHF1 MOSFET
transistors operating at 13.8V DC. The FLEX-6500 and FLEX-
Imagine frequency control locked to the GPS
6700 both include an automatic antenna tuner capable of tuning
antennas over 10:1 range (3:1 on 160m and 6m). Both models
The FLEX-6000 Signature Series is the first amateur radio product
provide an unprecedented 11 half-octave low pass filter banks to
family to offer an optional built-in GPS Disciplined Oscillator
allow continuous coverage for MARS operation. Two 80mm quiet,
(GPSDO). The GPSDO plug in module provides a precision 10
temperature controlled fans pressurize the enclosure to force air
MHz reference for the 983.04 MHz master oscillator and to a
through the PA heat sink fins and out through the back panel.
rear panel 10 MHz SMA output connector for external precision
frequency control. Frequency stability is 1 x 10-8 within 5 minutes
The PA subsystem is controlled by a dedicated Programmable
at 25° C and 5 x 10-12 over 24 hours with GPS lock. Rear panel
System on Chip processor that provides all thermal management,
SMA connections are provided for the GPS antenna input and
intelligent bias control, power/SWR monitoring, antenna impedance
10MHz reference output.
measurement, T/R switching, antenna tuning, and relay control.
When the GPSDO option is not installed, the FLEX-6700 and FLEX-
Power and real time SWR measurement is provided by a Tandem
6700R come standard with a ±0.02ppm Oven Controlled Crystal
Match directional coupler in conjunction with an Analog Devices
Oscillator (OCXO) and the FLEX-6500 comes with at ±0.5ppm
ADL5519 Dual Log Power Detector. This forms a precision
Temperature Controlled Crystal Oscillator (TCXO).
measurement instrument with bridge directivity >30 dB from 80m
through 6m (21 dB on 160m). Unlike the conventional diode
detectors used by other manufacturers, the log detector provides
+13.8V DC Power In
Balanced Microphone/Line Input
TX Relay Control
Antenna Connectors
Powered Speaker/Line Output
Transverter IF Connector
Optional 10 MHz GPSDO Output
Accessory Connector
SCU Receive Antenna Connectors
1 Gb Ethernet Connector
Optional GPS Antenna Input
Ground Terminal
USB 2.0 Peripheral Connections
FLEX-6700 Transceiver
FLEX-6500 Transceiver
FLEX-6700R Receiver
Central Processing Unit & DSP
RISC Processor
1.4 GHz ARM CortexTM-A8/NEONTM
1.2 GHz ARM CortexTM-A8/NEONTM
1.4 GHz ARM CortexTM-A8/NEONTM
DSP Coprocessor
1.2 GHz TMS320C647x 32-bit FP
1.0 GHz TMS320C647x 32-bit FP
1.2 GHz TMS320C647x 32-bit FP
RAM Memory
512 MB 1.333 GHz DDR3
512 MB 1.333 GHz DDR3
512 MB 1.333 GHz DDR3
FLASH Memory
256 MB μSD SLC 256 MB μSD SLC 256 MB μSD SLC Field Programmable Gate Array (FPGA)
Xilinx XC6VLX130TT
Xilinx XC6VLX75T
Xilinx XC6VLX130T
DSP Multiply Accumulate Performance2
317 GMAC
191 GMAC
317 GMAC
DSP Floating Point Operations
Ethernet Communications
1 Gbps
1 Gbps
1 Gbps
USB 2.0 Ports
Master Clock Frequency
983.04 MHz
983.04 MHz
983.04 MHz
Master Clock Phase Noise in dBc/Hz @ 245.76 MHz
-148 dBc @ 10 kHz, -152 dBc @ 100 kHz
-148 dBc @ 10 kHz, -152 dBc @ 100 kHz
-148 dBc @ 10 kHz, -152 dBc @ 100 kHz
10 MHz Reference Clock Stability (0 to +50° C; +32 to +122°F)
0.02ppm OCXO
0.5ppm TCXO
0.02ppm OCXO
GPSTCXO With Rear Panel 10MHz Reference Ouput
GPSTCXO Frequency Stability (GPS locked)
< 5E-12 over 24 hours
< 5E-12 over 24 hours
< 5E-12 over 24 hours
Frequency Resolution
1 Hz min.
1 Hz min.
1 Hz min.
Number of Memory Channels
Antenna Connectors
SO-239x2; BNCx2; XVTRx1
SO-239x2; BNCx2; XVTRx1
Antenna Impedance (without tuner)
50 Ohm Unbalanced
50 Ohm Unbalanced
50 Ohm Unbalanced
Power Supply Requirements
+13.8V DC ±15%
+13.8V DC ±15%
25–264 VAC; 47–63Hz; 20W
Current Drain (Receive/Max. Power)
1.5A / 23A
1.5A / 23A
Dimensions (with/without feet - 2U Rack Height)
13"W x 12" D x 4" H (2U - 3 1/2 in. without feet); 13”W x 12” D x 4” H (2U - 3 1/2 in. without feet);
13”W x 12” D x 4” H (2U - 3 1/2 in. without feet);
330mm x 305mm x 102mm (88.9mm w/o feet) 330mm x 305mm x 102mm (88.9mm w/o feet)
330mm x 305mm x 102mm (88.9mm w/o feet)
2U, 19 Inch (48.26cm) Rack Mounting Kit Optional
Front Handle Kit (Adds 1 Inch/2.54cm to total depth)
Weight (approximate)
12lb; 5.44kg
12lb; 5.44kg
11.1lb; 5kg
Operating Temperature Range
0 to +50° C; +32 to +122°F
0 to +50° C; +32 to +122°F
0 to +50° C; +32 to +122°F
Receiver Architecture
Direct Digital Sampling
Direct Digital Sampling
Direct Digital Sampling
Spectral Capture Units
Maximum Slice Receivers
ADC Resolution
ADC Sampling Rate
245.76 Msps
245.76 Msps
245.76 Msps
Wideband Frequency Coverage
0.30 – 77 MHz; 135 – 165 MHz
0.30 – 77 MHz
0.30 – 77 MHz; 135 – 165 MHz
MDS - Minimum Discernible Signal (500 Hz Bandwidth — TBD
Preselector Off)
Amateur Band Preselector Coverage
160m – 6m (except 60m)
160m – 6m (except 60m)
160m – 6m (except 60m)
PRE1: -11.5 to +20 dB DVGA; PRE2: 20 dB
Preamp: -11.5 to +20 dB DVGA
PRE1: -11.5 to +20 dB DVGA; PRE2: 20 dB
Spurious and Image Rejection Ratio
100 dB or better
100 dB or better
100 dB or better
Internal Speaker Audio Output Power
1W diagnostic speaker
1W diagnostic speaker
1W diagnostic speaker
External Powered Speaker Output Impedance/Level
10kΩ min./2.6Vpp max.
10kΩ min./2.6Vpp max.
10kΩ min./2.6Vpp max.
Transmitter Architecture
Direct Digital Upconversion
Direct Digital Upconversion
TX DAC Resolution
TX DAC Sampling Rate
491.52 Msps
491.52 Msps
RF Output Power
Amateur Band Coverage at Rated Power Output
160m – 6m
160m – 6m
Low Pass PA Filter Bands
11 half-octave
11 half-octave
Transverter IF Output Power
+0dBm Typical, +10 dBm max.
+0dBm Typical, +10 dBm max.
Transverter IF Frequency Coverage
0.5 MHz to 150 MHz
0.5 MHz to 150 MHz
Modulation System
Digital Low Power at Carrier Frequency
Digital Low Power at Carrier Frequency
Maximum FM Deviation
Carrier Suppression
<-80 dBc typ.
<-80 dBc typ.
Unwanted Sideband Suppression
<-80 dBc typ.
<-80 dBc typ.
Harmonic Radiation 1.8 - 50 MHz Amateur Bands
<-60 dBc; -70dBc 6m
<-60 dBc; -70dBc 6m
Transmit Bandwidth
Default 300-2700 Hz (Variable 50-5000 Hz)
Default 300-2700 Hz (Variable 50-5000 Hz)
Microphone Connectors
Unbalanced 8-pin, Balanced XLR/TRS
Unbalanced 8-pin, Balanced XLR/TRS
Microphone Impedance
600 Ohms Nominal (200-10kΩ)
600 Ohms Nominal (200-10kΩ)
Matching Range 80m – 10m
5 Ohms – 500 Ohms
5 Ohms – 500 Ohms
Matching Range 160m, 6m
16.7 Ohms – 150 Ohms
16.7 Ohms – 150 Ohms
All specifications are subject to change without notice. Specifications guaranteed for amateur bands only.
Based on 18x25 multiplier
FlexRadio Systems
Software Defined Radios
4616 W. Howard Lane, Ste. 1-150
Austin, TX 78728
512-535-4713 (ph), 512-233-5143 (fax)
© Copyright 2012, FlexRadio Systems. All Rights Reserved. FLEX-6000 Signature Series, FLEX-6500, FLEX-6700, FLEX-6700R and SmartSDR are trademarks and FlexRadio
Systems is a registered trademark of FlexRadio Systems. All other marks are property of their respective owners.
obligation and specifications are only guaranteed within the amateur radio bands. Rev 001, 5/8/2012.
Specifications are subject to change without notice or
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