SDR-Kits.net
Welcome to the SDR-Kits USB Synthesizer Kit
Updated 22nd November 2009:
QRP2000
USB-Controlled Synthesizer – Now
available with Si570BBB000141DG covering up to 810
MHz as
specified by
Silicon Labs - In
practice the Si570BBB can be used up to 945
MHz.
Stand Alone Operation supported – Synthesizer remembers last frequency entered, when not connected to PC
Three Power Supply options: USB – powered by PC, or standalone operation from +5V Battery or +7 to +13.8V External Power Supply
Provision for Transformer on PCB for matching into 50 Ohm Load:
Click here for Pricing and Ordering information
USB-Synthesizer Documentation V2.05 documentation 17 June 2009
Download USB-Synthesizer Driver and Firmware
USB-Synthesizer AVR Trouble Shooting
Developed by QRP2000-Design team: Tom – DG8SAQ, John - G8BTR, Alan - M0PUB, Guido - PE1NNZ, Steve - G0XAR & Jan - G0BBL
Fig 1: Top view of USB Synthesizer PCB
This Kit uses the Silicon
Labs Chip SI570, an "ANY-RATE I2C PROGRAMMABLE XO",
which is a 7x5mm² 8 pin integrated frequency synthesizer,
that
can generate almost any frequency between 3.5MHz and up to 160 MHz
minimum for the Si570CAC CMOS version, 280 MHz for Si570BBC LVDS
version and 810 MHz for the Si570BBB LDS version. Higher
Frequencies (up to 215 MHz for CMOS) have been obtained ).
The Si570 chips are programmable via
an I2C
Interface. The ready programmed ATMEL AVR uses Objective
Development's freeware USB solution for connecting the
synthesizer to the PC USB-Interface via USB port.
Main Applications
· Full Band or Multi Band coverage of Softrock RXTX V6.1 and V6.2 transceivers (use Kit 1 CMOS version)
· Standalone Operation (without PC connection) with Last Frequency Remember supported (Modification required)
· External Local Oscillator for other SDR hardware Projects – using PowerSDR application
· Wide range test oscillator – output frequency programmable in steps < 1 Hz.
Basic Specification:
· Frequency Range Kit 1: 3.5 MHz to 210 MHz for Kit 1 (10-160 Mhz specified by Silabs) and Kit 2: 3.5 MHz up to 280 MHz (10-280 MHz) specified by SiLab for C-grade LVDS device supplied) New!! New!! Si570BBB Device up to 945 MHz (810 MHz specified by Silabs) available!
· Stability +/- 50 ppm CMOS or +/- 20 ppm LVDS versions
· Output: Square wave : CMOS version 2.6V pk-pk 15pF , LVDS version 0.7V pk-pk into 100 Ohm
· Power Supply: USB Powered or +5V to +12V Power Supply – approx 100mA
· PCB size 41 x 48 mm
· Suitable for constructors with some previous experience of kit building experience like Softrock Projects
Fig 2 : Component Placing – U2 Si570 is mounted at the other side of the PCB
Complete Kits will contain a quality double sided PCB, a programmed Atmel ATTiny45 micro-controller and other parts including the SiLabs Si570CAC000141DG CMOS device, Si570BBC000141DG or Si570BBB000141DG will be supplied as ordered.
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UK Orders Includes 1st Class Postage to UK |
Orders in £ (GBP) to European Countries Includes Standard Airmail Postage to Europe |
Orders in £
(GBP) |
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QRP2000 USB-Controlled RF Synthesizer Kits |
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Kit 1: 160
MHz CMOS
USB-Controlled Synthesizer kit of parts with Si570CAC CMOS
Device, PCB and programmed Atmel ATTiny45 for Softrock RXTX V6.1
and V6.2. including shipping |
£23.50 |
£24.50 |
£25.00 |
|
Kit 2: 280
MHz LVDS
USB-Controlled Synthesizer kit of parts with Si570BBC LVDS
Device, PCB and programmed Atmel ATTiny45 including
shipping |
£25.50 |
£26.50 |
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Kit 3: USB-Controlled
Synthesizer kit of parts with programmed ATTiny45 but without
Si570 Device or T1 including shipping |
£13.00 |
£14.00 |
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Kit 4: 810
MHz LVDS USB-Controlled Synthesizer kit of
parts with programmed ATTiny45 with Si570BBB000141DG LVDS Device
including shipping |
£47.00 |
£48.00 |
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Silicon Labs Si570 Synthesizer ICs for constructors |
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Silicon Labs Si570
CAC000141DG CMOS Device – 160 MHz Spec including
shipping |
£14.00 2 for £27.00 |
£15.00 2 for £28.00 |
£15.50 2 for £28.50 |
|
Silicon Labs Si570
BBC000141DG LVDS Device – 215 MHz Spec including
shipping |
£15.50 2 for £30.00 |
£16.50 2 for £31.00 |
£17.00 2 for £31.50 |
|
Silicon Labs Si570
BBB000141DG LVDS Device - 810 MHz Spec - including
shipping |
£37.00 |
£38.00 |
£38.50 |
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Mitsubishi
RF Power FETS from Stock |
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SDR receiver kits by KB9YIG |
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Softrock 40 Lite by
KB9YIG for centre frequency 7.055 kHz - including
postage |
£13.00 |
£14.00 |
£14.50 |
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Softrock 80 Lite by
KB9YIG with 3 crystals supplied. Centre frequency 3.750
kHz, 3.522 kHz or 3682 kHz - including
postage |
£14.00 |
£15.00 |
£15.50 |
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Optional
Additional cost
for “Signed for Registered Delivery" for orders less
than £60.00 in value: |
Add £1.00
|
Add £4.00
|
Add £4.00
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· Orders
should be made by sending your payment via Paypal
to:
sdrkits
at gmail.com
(replace at by @
without spaces)
UK
Amateurs who do not have paypal may order by post with cheque made
payable to Jan Verduyn
Please
do not forget to state your name and full postal address with your
order.
· UNITED STATES AND CANADA Kit orders: - USB-Synthesizer kits should be ordered direct from Tom Hoflich KM5H (thanks to Tom for bringing the Si570 to attention of Radio Amateurs)
USB-Synthesizer Kit assembly Instructions and Circuit Diagram (PDF File) for PCBs v2.03 onwards Updated June 17th 2009
Contents:
Introduction
2. Bill of
Materials
3. Kit Assembly and
Troubleshooting
4. Driver Installation for Microsoft
Windows XP
5. Driver installation verification
6. Functional
Tests
7. Interfacing with Softrock RXTX 6.1 and 6.2
8.
PowerSDR Setup
9. Rocky SDR Application Setup
10.
USB_Synth.exe and Si570 Calibration
Older PCB V1.0 Build Documentation and Circuit diagram PCB can be downloaded here:
PCB V1.1 SDR-Synthesizer Kit Documentation (PDF File)
PCB V1.1 has a floating pad which should be connected to ground.
Field bulletin issued shows how to link the pad – Also updated component placement diagram!
USB Driver and Firmware by DG8SAQ
Driver
and sources of the firmware and host software including a free
LibUSB driver
can be downloaded here:
Download
DG8SAQ-Synthesizer Driver and firmware
PowerSDR
Software
Release
Current
version of PowerSDR application with Softrock extensions provided by
Guido PE1NNZ through Sourceforge can be downloaded here.
Current
PowerSDR Software for SDR
Updated PE1NNZ PowerSDR Documentation can be downloaded from here:
Latest PowerSDRSR40 Installation Documentation
USB - AVR Troubleshooting Guide – Use this guide to trace your problem.
AVR Si570 Troubleshooting Guide by DG8SAQ
DG8SAQ USB_SYNTHESIZER APPLICATION
USB_SYNTH - Stand alone application to set Si570 Frequency (Zip file)
· Tom has written a cute application to set the frequency of the Si570 which may be downloaded from the link above.
· The frequency may be set to the nearest Hz......
· Or a Multiplication factor or Frequency offset (IF offset) may be specified ..
· Applications include RX Local Oscillator and VXO for TX applications, Test Oscillator or QRSS Beacon etc.
· Picture below shows the Setup screen and the configuration options.
· “Last Frequency Remember” Option for Standalone applications.
Links
-
USB
AVR Project Home page of Tom Baier DG8SAQ.
Tom developed the AVR firmware
for this project and also had a big input into the hardware design of
the AVR-Synthesizer. The LATEST Released AVR firmware may be
downloaded from Tom’s website:
PowerSDR
SDR Software:
This is the link to download the
freeware version of PowerSDR which supports the USB-Synthesizer
produced by Guido PE1NNZ and Alan M0PUB & others who provided
this great software
Rocky V3.6 SDR Application Software:
Use this link
to download Alex VE3NEA Rocky 3.6 Program with USB AVR support
Thanks to Alex for providing this Support!!
Publications
-
This
Project was published in:
·
SPRAT 135 - Summer 2008
– Journal of the G-QRP
Club:
USB-Controlled Synthesizer for Softrock RXTX and Local
Oscillator Applications by Jan
Verduyn G0BBL
· “FunkAmateur” FA June 2008 Minimalistischer hochwertiger Synthesizer mit USB-Steurung – Thomas Baier DG8SAQ: Pages 622 – 624
Copyright
notice: The
USB-Synthesizer project design on this page is Copyright 2008, 2009
by QRP2000 Design team.All rights reserved.
Kit
of parts produced by SDR-Kits.net under licence from QRP2000 Design
Team
Website Copyright 2008, 2009 by
SDR-Kits.net
