Vertex Standard FT-60R Especificações descarregar pdf (Página 4)

From February 2005 QST © ARRL

Wide-Coverage Internet Repeater

Enhanced System (WIRES). Also

new to me with this radio was its au-

tomatic range transponder system

(ARTS), a system that allows you

and another ARTS-equipped station

to determine if you are within range

for radio communications. Again, I

could see this feature being useful

for groups on an outdoor outing and

the like, but it is one of the bells and

whistles that I would probably not

be inclined to utilize. The FT-60R

has all the required pieces to allow

repeater autopatch use, something

that we have come to expect.

One interesting feature that

some may be inclined to use is the

ability to use a password system to

secure your radio. You may set up

a four digit (numbers and letters are

available) password that would be

required to activate your radio. For

those with curious children around

Figure 2—The supplied

antenna is much larger than

the radio.

the house who want to get on the radio

just like their parent, this would be a

good feature to stop unauthorized

transmissions.

The FT-60R offers two user-

definable keys on the front panel. By

following the detailed instructions

in the manual, a user is capable of

adding certain features (such as

specific memory recall) to the basic

operation of the radio simply at the

press of a button.

One last available feature,

which I did not have the

ability to test (optional soft-

ware and a cable is required),

was programming software.

This option allows you to

use your PC to set up the

memory channels then import the data

file to the radio, eliminating the need to

punch in the options manually for each

channel. This timesaver could be a real

plus considering the number of memory

locations provided.

And the Verdict Is…

Overall, I found the FT-60R durable

and straightforward to operate. It per-

formed well in on-the-air testing. Com-

ments from other operators praised its

transmit audio quality. I found that it

offered a wide range of features for a

moderately priced radio—this is one that

I would consider adding to my shack,

even though I might not need all the fea-

tures it offers.

Manufacturer: Vertex Standard, 10900

Walker St, Cypress, CA 90630; tel 714-

827-7600; www.vxstdusa.com. Price:

FT-60R, $199.99; ADMS1J, program-

ming software, $38.99; CT27, cloning

cable, $11.99.

Joel R. Hallas, W1ZR

Assistant Technical Editor

It is not an exaggeration to say that

today’s top ranked Amateur Radio trans-

ceivers have receivers that are far better

in most respects than those of earlier gen-

erations. Fortunately for us (perhaps

unfortunately for manufacturers) every

advance in technology results in the rais-

ing of the bar for some parameter or other.

In the very early days, there was a quest

to be the most sensitive. The sensitivity

goal was followed by a desire for opti-

mum selectivity. Then came image rejec-

tion, linear and consistent tuning rate,

reduction in front-end overload and on

and on it went. Each advance seemed to

highlight the next parameter that needed

attention.

Today a remaining Achilles’ heel of

our highly refined receivers seems to be

near-in third order intermodulation dis-

tortion (3OIMD). All mixers have prod-

ucts beyond the usual signal frequency ±

the local oscillator. Generally other prod-

ucts are reduced significantly, but if the

signals are very strong the undesired

products can be heard. A particularly

troublesome response is from the combi-

nation of signals at one frequency and

International Radio Roofing Filters for

Yaesu FT-1000MP Series Transceivers

ing in your attenuator, or turning off your

receiver preamp. The 3OIMD response

will be reduced three times as fast as the

desired signal and often the 3OIMD

signal(s) will disappear. Unfortunately,

by reducing the receiver gain, you are also

reducing the desired weak signal. Even

though it is not reduced by as much as is

the 3OIMD response, it may become dif-

ficult copy.

Fortunately, many casual operators

don’t notice this effect since there usu-

ally aren’t as many really strong signals

all over the band much of the time. The

real problem shows up during contests

when signals may be every 0.5 kHz (for

CW) or every 2 kHz (for SSB contests)

over the whole band. During DX pile-ups,

the same situation may occur. The sig-

nals tend to be clustered more tightly, but

the often weak DX station will request

calls up 2 or 5 kHz, setting the stage for

3OIMD just when you’re trying to figure

out which station he’s calling.

It’s worth noting that while we test in

the Lab with two signals for each mea-

BoBo

tttt

om Line

om Lineom Line

om Line

ttom Line

A transceiver popular with the

contest and DX communities can

be brought up to date at reason-

able cost using InRad roofing

filters.

twice another frequency, referred to as the

third order (K×f

×f

) response. The

3OIMD response of your receiver can

generate an interfering signal(s) right on

top of the one you are listening to from

two (or more) signals outside your lis-

tening passband.

This parameter has been discussed a

number of times in the past in QST and

elsewhere.

This phenomenon manifests

itself while you are trying to copy a weak

signal on frequency f

, and there are

strong signals at f

plus a small increment

and another at f

plus twice

the same in-

crement.

This effect can be verified by switch-

For example, if you are trying to listen at

14,020 kHz and there are strong signals at

14,023 and 14,026 kHz.

D. Potter, W2GZD (now W4RPI), “Inter-

modulation Reviewed,”

QST

, May 1983,

pp 17-18.

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