MFJ 1204 Manuel utilisateur

INSTRUCTION MANUAL

CAUTION: Read All Instructions Before Operating Equipment

MFJ ENTERPRISES, INC.

300 Industrial Park Road

Starkville, MS 39759 USA

Tel: 662-323-5869 Fax: 662-323-6551

Model MFJ-1204

VERSION 1A

USB Radio Interface

Introduction: The MFJ-1204 puts you in touch with Ham Radio's digital

revolution without complex wiring or setup procedures. In fact, the MFJ-1204 is

easier to set up and use than any other USB-interface on the market. All you

need is an existing radio, a computer, some free downloadable software, and

your MFJ-1204.

MFJ-1204 Features:

[ ] Full USB connectivity

[ ] Powered by USB port, no power adapter needed.

[ ] Dedicated on-board sound card

[ ] Quick plug-and-play Windows connectivity

[ ] Only two adjustable controls to operate

[ ] Works with all digital modes

[ ] Dozens of free downloadable programs available

[ ] Innovative PTT detector circuitry eliminates VOX delay

[ ] Uses widely available interface cables for most popular radios

[ ] Low cost, small size, light weight

[ ] Perfect for base station, portable operation, or "go-kit" use

Overview: You'll begin setup by looking up the jumper settings for your radio (in

the manual, on line, or with radio cable instructions). Then, you'll remove the

MFJ-1204 cover and install the jumpers as illustrated (it only takes a minute).

Note that you MUST install the jumpers first, before connecting the interface to

your computer and radio.

Once jumpers are installed, the interface's signal cable connects to any free USB

port on your computer to obtain power and establish a two-way signal path. Your

computer should be turned on and booted up before this connection is made. To

complete the setup, install the prescribed radio interface cable between the

Radio port (J-45 connector on rear panel) and the mating jack on your

transceiver. Step-by-step instructions are provided for set procedures.

The MFJ-1204 supports virtually every data and digital-voice mode in use today.

With the appropriate software downloads, you can transmit and receive

traditional modes such as CW, RTTY, SSTV, AMTOR, PSK31, and EchoLink.

Or, you can explore newer modes like MT-63, WINMOR, WSPR, and WSJT-X. If

your radio can pass the signal and your computer can run the downloaded

program, the MFJ-1204's built-in sound card and your PC will handle the rest!

MFJ offers patch cables to fit most popular radios, and these cables are also

interchangeable with cables manufactured by SignalLink-USB (and possibly

others). Just purchase the correct one for your transceiver, plug in, and go.

Setting Jumpers:

Setting jumpers is a "one-time" procedure that interconnects your particular radio

to the MFJ-1204. If possible, use the jumper wires provided (#24 solid or solder-

tinned wire works best). Avoid larger wires that could damage the pin cups.

These jumpers route ground, PTT, transmit audio and receive audio to the

appropriate wires in the interface cable. To set jumpers:

[ ] Remove the two phillips-head screws securing the MFJ-1204 cover.

[ ] Remove the cover and set it aside.

[ ] Locate the 16-pin IC socket directly in front of the J-45 jack.

[ ] Note the labeling on the pc board for each of the socket connections.

To reduce the possibility of error, we recommend drawing out the required

jumper routings ahead of time on the template provided below (extra templates

also provided in case you change radios at a later time).

Note that this document is a preliminary manual for the MFJ-1204, so not all

jumper routings have been complied at this time. However, some setups are

shown in the back and continually updated setups may be found on MFJ's

website and on the Tigertronics Signalink site (jumper settings and interface

cables are interchangeable). Settings may also be provided on instruction sheets

that come with pre-wired interface cables.

To begin jumper setup:

[ ] Draw in the jumper settings for your particular radio.

GND

PTT

MIC

SPKR

IC1

Radio____________

GND

PTT

MIC

SPKR

IC1

Radio____________

GND

PTT

MIC

SPKR

IC1

Radio____________

[ ] Following your diagram, carefully install the jumpers at IC1.

[ ] Double check your installation to ensure it is correct.

[ ] Reinstall and secure the MFJ-1204 cover.

If making a cable for an unlisted radio, refer to its operating manual to determine

the appropriate jack and pin-out configuration to use.

Connecting to Your Computer

Important Note: Do not connect the MFJ-1204 to your computer until the

prescribed set of jumper wires have been installed, the computer is turned on,

and its operating system has fully booted up. Also, close any applications that

are open and running before plugging in the interface.

When you plug in the USB interface cable, the computer will signal that one or

more new devices have been connected. The interface sound card will then

automatically begin loading the following drivers:

USB Composite Device

USB PnP Sound Device

USB Human Interface Device

Installation typically takes less than a minute to complete. After the drivers have

loaded, select Restart and reboot you pc before continuing.

Important Warning: If you don't initiate a Restart before continuing, some

Windows machines may become unresponsive. Also, note that driver installation

is a one-time event for each USB port used. If you change USB ports, the

soundcard will repeat the setup sequence and you'll need to Restart again.

Selecting a Download Program: Literally dozens of downloadable shareware

communication programs are available for running a wide range of digital modes.

Many are quite inclusive, offering a selection of several modes -- and some may

work better for you than others. While MFJ doesn't recommend any particular

choice as the best to try, HamScope is well established, popular, and covers

several communication modes.

Selecting the USB Soundcard: Most communication programs will require you

to select a sound card as part of the setup procedure. Select USB Sound. This

choice directs your computer to access the sound card built into the interface unit

rather than the resident card installed in your computer.

Receive Audio Level: The interface's receive audio control is fairly uncritical and

relatively easy to set. When copying signals off-air, simply adjust it for the most

reliable on-screen display of incoming signals. If your receiver has built-in audio

EQ, we recommend setting it for flat response (±0 dB).

Be sure to leave the Transmit audio level at minimum (fully CCW) and don't

attempt to transmit while setting up the receive control.

Transmit Audio Level: Make sure your transceiver is operating into a low-SWR

antenna or dummy load before proceeding. Most communication programs offer

a "tune" function to provide a reference tone for setting transmit levels (check the

program's documentation for tune-up specifics). When setting up, start with the

Transmit control at minimum and bring it up slowly to avoid overdriving. Your

signal must be as linear as possible when transmitting digital signals, so consider

the following tips:

[ ] In addition to RF output, always monitor ALC level and set the interface

Transmit level below the threshold of ALC action. The ALC meter should not

deflect during digital transmissions.

[ ] Be sure to turn off RF speech processing and/or audio compression. Also, if

the radio has built-in transmit EQ, set it up for flat frequency response (±0 dB).

[ ] Most transmitter PAs exhibit gain compression when approaching maximum

output. Limiting output to 70% of maximum or even less substantially improves

linearity while making negligible difference in received signal strength.

[ ] Never use the radio's Power Output control to set power (use the Transmit

control on the interface). Most radios utilize ALC voltage to reduce power and it

compromises linearity.

Finally, some digital modes such as RTTY require your transmitter to operate at

maximum output power for extended periods. Be sure to reduce output well

below maximum or provide supplemental cooling to avoid PA transistors from

overheating.

Jumper Setups: These jumper settings are prescribed for the listed HF

transceivers. The associated radio cables use the connectors indicated above

the pictorials.

ICOM:

GND

PTT

MIC

SPKR

IC1

GND

PTT

MIC

SPKR

IC1

GND

PTT

MIC

SPKR

IC1

Icom 728, 728, 735,738

746PRO, 751, 756Pro

761, 765, 775, 781

Icom 706

RJ-45 Mic

8-Pin RD Mic 6-Pin Din Port

Icom 706*, 746*, 7000*

7100, 7400

*(set menu 29 for 1200 baud)

ICOM, KENWOOD, TENTEC:

GND

PTT

MIC

SPKR

IC1

GND

PTT

MIC

SPKR

IC1

GND

PTT

MIC

SPKR

IC1

13 Pin DIN 5-Pin DIN

Icom 706, 718* 7000*, 7100*

7200, 7300, 7410, 9100

*(Turn Down Mic Gain)

13-Pin DIN

Kenwood TS-140, 450S,

850, 870, 950, 570D, 590S

990, 2000

TenTec Argo-V, Jupiter,

Omni-VII, Pegasis

YAESU:

GND

PTT

MIC

SPKR

IC1

6-Pin Mini-DIN Data Port

Yaesu FT-100, 817, 857, 897

950, 991, 1500M, 7100, 7800R,

7900R, 8100, 8500, 8800R, 8890R

FTDX-1200, 3000

Check with the MFJ or the SignaLink website for additional settings and

operating notes.

In Case Of Trouble:

[ ] No Power to Interface: Remove the interface cover. If the sound card is

plugged in and receiving power, the red LED on the sound card module will be

illuminated. If it is not illuminated, check USB connection at the computer.

[ ] Communication Program not Working: Confirm the USB sound card has

been selected. Also, use a scope or AC voltmeter to confirm receive audio path

is good between the radio and the jumper block.

[ ] No Transmit, won't key: Check PTT line from jumper block to transceiver

connector for continuity.

[ ] Low (or no) Output Power, Distorted Transmit Signal: Check microphone

line from jumper block to transceiver connector for continuity. If applicable, check

radio's mic gain setting. Also, check Transmit setting on interface.

[ ] Communication Program won't Load up or run properly: Confirm that the

download program is compatible with your current operating system.

If you are unable to resolve the problem, check the MFJ and SignaLink sites for

special settings or conditions that may apply to your particular radio. Also,

contact MFJ Technical Support at 662-323-0549 for assistance. Be sure to

document the exact nature of the problem so our technicians can provide the

most efficient response. You may also contact [email protected]

on line with a description of the difficulty.

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