Winradio G305 Manuale utente
WiNRADiO®
G305 VHF/UHF Receiver
User’s Guide
WiNRADiO G305 VHF/UHF Receiver
2
Published by
WiNRADiO Communications
PO Box 6118, St Kilda Road, Melbourne 3004, Australia
© 2006 WiNRADiO Communications, Melbourne
All rights reserved. No part of this book may be reproduced or transmitted in any form or by any
means without the written permission of the publisher.
Trademarks
WiNRADiO, G3 and G305 are trademarks of WiNRADiO Communications.
All other brand and product names are trademarks of their respective owners.
Patents
WiNRADiO technology is protected by US Pat. No. 6,289,207 and other pending US and
international patent applications.
Printed in Australia
WiNRADiO G305 User’s Manual
3
FCC Notice
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
•Reorient or relocate the receiving antenna
•Increase the separation between the equipment and the receiver
•Connect the computer into an outlet on a circuit different from that to which the receiver is
connected
•Consult an authorised dealer or an experienced radio/TV technician for help
Caution
To comply with the limits for the Class B digital device, pursuant to Part 15 of the FCC rules, the
WiNRADiO receiver must be installed in computer equipment certified to comply with the Class B
limits. Only peripherals certified to comply with the Class B limits may be attached to the
computer containing the WiNRADiO receiver. Only original cables and power adapters must be
used. Operation with non-certified cables, power adapters and peripherals may result in
interference to radio and TV reception.
Modifications
Any changes or modifications to the WiNRADiO receiver could void the user's authority to operate
this equipment, as well as void the manufacturer’s warranty.
Limitation of Liability and Remedies
The information published in this book has been compiled from several sources. While every
effort has been made to ensure its accuracy, neither the authors nor the publisher can guarantee
that all information is entirely correct or up-to-date. Furthermore, neither the authors nor the
publisher can take any responsibility for the use of this information or any consequences arising
therefrom. WiNRADiO Communications shall have no liability for any damages due to lost profits,
loss of use or anticipated benefits, or other incidental, special or punitive damages arising from the
use of, or the inability to use, the WiNRADiO receiver, whether arising out of contract, negligence,
tort or under any warranty, even if WiNRADiO Communications has been advised of the possibility
of such damages. In no event shall WiNRADiO Communications ' liability for damages exceed the
amount paid for this product. WiNRADiO Communications neither assumes nor authorises anyone
to assume for it any other liabilities.
Warning
In certain countries or states it may be illegal to monitor certain frequencies. We cannot accept
any responsibility for the consequences of your non-compliance with government regulations. If
you are in doubt about the regulations in your country or state, please contact your nearest radio
communications regulatory authority.
WiNRADiO G305 VHF/UHF Receiver
4
Table of Contents
Table of Contents .................................................................................... 4
Introduction.............................................................................................. 5
G305 Receiver Models ............................................................................ 6
Installation................................................................................................ 9
System Requirements.......................................................................... 9
Hardware Installation......................................................................... 10
G305e Interface Status Indication...................................................... 13
Connecting the Antenna .................................................................... 14
Software Installation........................................................................... 15
Setting up the Sound Card................................................................. 15
Getting Started....................................................................................... 20
Using WiNRADiO G305 ......................................................................... 22
Tuning to a Frequency ....................................................................... 22
Fine Tuning........................................................................................ 23
Fast Tuning Pad................................................................................. 24
Setting the Modulation Mode ............................................................. 24
Volume Control .................................................................................. 26
Mute Control ...................................................................................... 26
Audio Filter......................................................................................... 26
AGC ................................................................................................... 27
IF Gain ............................................................................................... 28
Software AGC .................................................................................... 28
AFC.................................................................................................... 29
RF Gain.............................................................................................. 29
Squelch Control ................................................................................. 30
Frequency Stepping........................................................................... 32
Frequency Memory ............................................................................ 33
Scanning............................................................................................ 40
S-meter .............................................................................................. 45
Power Switch ..................................................................................... 46
Date and Time Displays..................................................................... 46
Spectrum Scope ................................................................................ 47
Appendix A -Troubleshooting ............................................................. 50
Appendix B -Sound Card Controls ..................................................... 55
Appendix C -Dealing with Interference............................................... 57
Appendix D -Inside WR-G305 .............................................................. 59
Appendix E -Professional Demodulator Option................................. 61
Appendix F -Wide-band FM Option..................................................... 69
Appendix G -Developer Support ......................................................... 70
Appendix H -Frequency Calibration.................................................... 71
WiNRADiO G305 User’s Manual
5
Introduction
Welcome to the WiNRADiO G305 scanning receiver. Your new receiver is a
world-first in more than one respect. Most importantly, it is the first
commercially available Software Defined Receiver (SDR) for the VHF/UHF
bands, where the entire demodulator and the last intermediate frequency
stage are performed by software running on a personal computer rather than
using conventional hardware circuits or a dedicated Digital Signal Processor
(DSP). Your PC probably has more power than even the fastest DSP had only
a few years ago. Your new WiNRADiO G305 receiver is now ready to take
advantage of that power.
This advanced receiver is the result of our ongoing quest to combine many
years of accumulated know-how in computer-based radio receivers with the
latest advances in components and digital signal processing techniques, to
push the radio technology forward and make it available at an affordable price.
In designing the WiNRADiO G305 receiver, we strived to provide the optimum
balance of sensitivity, selectivity and dynamic range, yet maintaining low cost
and implementing a number of significant features previously available only on
receivers significantly more expensive, bulky and far less friendly to the user.
While we have implemented many more features and functions than normally
would be found on a typical communications receiver, we also strived to keep
its operation logical, intuitive and easy to use.
The WiNRADiO G305 receiver transforms any modern personal computer into
a sophisticated VHF/UHF monitoring station offering surprising power and
flexibility.
We wish you many hours of enjoyment with your new G305 receiver.
WiNRADiO provides regular upgrades to our application software. Don’t forget to
register as a WiNRADiO user to receive news about new products, accessories and
software upgrades for your WiNRADiO G305 receiver. Use our on-line registration form
on www.winradio.com/register to take advantage of this free service.
WiNRADiO G305 VHF/UHF Receiver
6
G305 Receiver Models
There are two basic models of the WiNRADiO G305 receiver:
•G305i (PCI card based “internal” model)
•G305e (USB based “external” model)
Both receivers have similar parameters and identical software user interface.
This manual covers the installation and operational aspects for both types.
The G305i model has two connectors: the antenna connector (SMA type,
50 ohm) and 12 kHz IF (intermediate frequency) output:
The signal from the 12 kHz IF output is normally connected to the PC sound
card, where it is digitized, to be then processed by the PC.
The advantage of this model is that it does not require any external power
supply, and does not occupy any additional desk space. The receiver is very
well shielded to prevent any interference generated by the PC from entering
the receiver. The receiver comes with a suitable audio lead to connect the 12
kHz IF output to the sound card input.
WiNRADiO G305 User’s Manual
7
The external G305e model has three connectors:
The power jack accepts 12 V DC (the power adapter must be rated for
minimum 500 mA). To minimize interference, a linear-mode power adapter is
recommended (as supplied by WiNRADiO).
The antenna input is an SMA-type connector with 50 ohm impedance.
The IF output/control connector combines the 12 kHz IF (intermediate
frequency output), USB interface and serial interface. Normally, only the USB
interface cable is supplied, and the IF signal arrives from the receiver to the
PC already digitized, via the USB cable. This method is preferable, because it
relies on a high-quality analog-to-digital converter inside the receiver, and
guarantees optimum and consistent performance. The installation is also
simpler as it does not require adjustment of the 12 kHz IF signal input level
(this is already set to an optimum level inside the receiver).
WiNRADiO G305 VHF/UHF Receiver
8
It is also possible to control the receiver via the serial (RS-232) interface,
which necessitates using the PC sound card for digitization of the IF signal.
WiNRADiO provides a special serial interface option cable which takes care of
all the appropriate connections, both to the serial port and the sound card
input.
G305e serial interface option
As this interfacing method relies on the sound card to provide the digitization
of the 12 kHz IF signal, it requires careful adjustment of the input signal level.
The performance will depend on the sound card quality, similarly to the internal
G305i model. It is a suitable method in situations where the receiver needs to
be controlled by computer systems without the USB interface.
Did you know?
DRM (Digital Radio Mondiale) is a new digital broadcasting system for medium and
short waves. By introducing sophisticated signal coding and compression, this system
offers a dramatic improvement in broadcast quality. WiNRADiO has a DRM
demodulator available for your G305 receiver. For more details please refer to
www.winradio.com/drm.
WiNRADiO G305 User’s Manual
9
Installation
The WiNRADiO package contains the following items:
•WiNRADiO G305i or G305e receiver
•WiNRADiO software on a CD ROM
•Start-up indoor antenna
•Audio cable (G305i model only)
•Power adapter (G305e only)
•Interface cable (G305e only)
•This User’s Guide
•Warranty information
In order for the WiNRADiO receiver to function, your IBM PC compatible
computer must meet the minimum system requirements specified below.
System Requirements
Minimum Recommended
CPU 500 MHz,
Pentium III
1GHz or higher,
Pentium IV or Athlon
RAM 64 MB 256 MB or more
Display SVGA SVGA (16 mil. colors)
HD free space 20 MB 40 MB
Sound card SoundBlaster
compatible, 16 bit,
full duplex
Creative Sound Blaster,
16 or 32 bit
OS Windows
98/ME/2000/XP
Windows XP
Note: LCD TFT panel displays are preferable to older CRT monitor types, as
modern LCD panels typically exhibit far less electromagnetic interference.
WiNRADiO G305 VHF/UHF Receiver
10
Hardware Installation
G305i model (PCI card-based)
1. Turn off the computer and disconnect the power cord.
2. Remove the computer case. Choose an empty PCI slot, as far as possible
from the power supply and from other cards.
3. First touch the computer metalwork with your hand to drain any static
charge, then carefully insert the card into the vacant slot and push down
until it is firmly seated. Screw the metal bracket at the end of the card to
the computer case. (This must be done to provide proper grounding for the
card).
4. Replace the computer case and reconnect the power cord.
5. Connect the supplied audio lead between the receiver output (a standard
audio jack) and the sound card Line Input. (If there is no Line input on your
PC, as is the case with some laptops, you may use alternative inputs, such
as the Microphone input. This may be also necessary with certain types of
sound cards, such as Creative Audigy 2.)
G305i receiver installed in a desktop PC
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