AOR AR-ONE Specifications download pdf (Page 65)

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versions, because some early models are only available with ISA cards. Software for early models was 16-bit

and may or may not run in Windows 2000 or XP.

Winradio came out with the 'G3' series a few years ago. They are bucking the trend again by producing HF

radios (30 MHz maximum) on a PCI card. The G3 series introduced the computer-adjustable demodulator that

allows you to set the bandwidth to as little as 1 Hz. This was an option on the G303i but standard on the G313i.

The latest G series is the G305 and G315, which cover from 9 kHz to 1800 MHz.

Winradio has gradually overcome resistance to the concept of a radio inside the noisy environment of a

computer. The shielding on the card is reportedly adequate to completely eliminate computer noise. However,

Win radios must be used with an antenna that is placed far away from the computer. An active antenna

connected by a 30 meter coaxial cable is sometimes adequate to prevent computer noise. However, in my

experience, interference from computers and networking equipment (especially hubs) still gets into radios, even

when using a shielded cable and an active antenna located many meters away. This interference consists of

evenly-spaced carriers that range from 17 kHz to well over 140 MHz. Before buying a software radio, my

advice is to set up the antenna first and measure the amount of interference using a cheap portable radio or

scanner.

The biggest disadvantage of the Winradio is the fact that it runs only on Windows. Although there is a linradio

site, Linradio appears to be a long-abandoned project that never approached parity with the Windows version.

With Microsoft's operating system encumbered with ever more obtrusive and annoying features, such as the new

requirement that users install a piece of spyware known as "Windows Genuine Advantage" on their computers,

Winradio may lose many potential customers despite producing a first-rate radio.

Another disadvantage of a software radio is the lack of portability. You can't just move the computer around

because of the requirement for a shielded cable and external antenna. Another disadvantage is that if a Winradio

is installed on a desktop computer, it would be useless during a power outage, when reception is best.

The Winradio software supports Radio Basic programming

. The API is documented, which allows developers to

access the receiver hardware. (Note that the programming information available online consists mainly of

function calls to a binary-only Windows DLL; it's unclear how difficult it would be to access these functions

under Linux). Winradios conform to the XRS (Extensible Radio Specification) which allows third-party plugins

to be created.

The Windows software for Winradios includes features like spectrum display and various signal decoding

options that previously have only been available to specialized users with unlimited funds (e.g., the military).

While the Winradio is by no means in this class (it doesn't analyze radar signals, for example, and superior

versions of the spectrum display can be obtained using software that analyzes the audio signal), it comes closer

than most others. Even on HF, digital waveforms are gradually replacing analog. Many of the signals you will

hear on a shortwave radio are FAX, RTTY, or slow-scan TV transmissions. On UHF, you will find a great many

digital signals, including digital audio and TCP/IP. These signals are just noise to a receiver that only handles

AM, SSB, and CW. Winradio is one of the few companies that provides something powerful enough to allow

members of the general public to analyze these types of signals. However, these functions require purchase of

additional software.

AM sensitivity

price bandwidth 150kHz 10MHz

WinRadio WR-G303i $499 9 kHz - 30 MHz 2 to 9 0.9 µV

WinRadio WR-G303i/pro demodulator $599 9 kHz - 30 MHz 2 to 9 0.9 µV*

WinRadio WR-G313i $999.95 9 kHz - 30 MHz 1.6 0.9 µV*

WinRadio WR-G313i/180 $1249.95 9 kHz - 180 MHz 1.6 0.9 µV

WinRadio WR-1550e RCV47-E $549.95 150 kHz - 1500 MHz 5 1 µV

WinRadio WR-1550i RCV47-I $499.95 150 kHz - 1500 MHz 5 1 µV

WinRadio WR-3150e RCV48-E $1849.95 150 kHz - 1500 MHz 5 1 µV

WinRadio WR-3150i-DSP RCV48-I $1375.00 150 kHz - 1500 MHz

WinRadio WR-3500e RCV49-E $2395.95 150 kHz - 2600 MHz 5 1 µV

WinRadio WR-3500i-DSP RCV49-I $2395.95 150 kHz - 2600 MHz 5 1 µV

WinRadio WR-3700e RCV50-E $2895.95 150 kHz - 4000 MHz 5 1 µV

WinRadio WR-3700i-DSP RCV50-I $2895.95 150 kHz - 4000 MHz 5 1 µV

* Vendor quotes AM sensitivity at 0.9 uV at 30% modulation and

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AOR AR-ONE Specifications Page 65

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