MFJ Enterprises MFJ-498, Руководство пользователя

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MFJ-498 Instruction Manual
Installation
Power
The MFJ-498 Morse Keyboard requires a 12 VDC 500 milliamp power supply. The
power jack accepts a 2.1 mm coaxial plug with the center conductor positive and
shield ground. An optional DC supply, the MFJ-1315, is available from MFJ
Enterprises. Connect your MFJ-1315 Power Adapter or compatible DC supply into
the jack marked
POWER on the MFJ-498 back panel.
Keying Output
This unit supports both positive and negative keyed radios. The MFJ-498 has both
Direct or Grid Block outputs. Use the Direct output for a positive keyed radio (most
solid state radios). Use the Grid Block output for a negative keyed radio (most
radios with tube finals). Use a standard shielded RCA cable between your radio key
input and to either the
Direct or Grid Block key output.
Keyboard
The MFJ-498 is supplied with an IBM-AT compatible keyboard. The MFJ-498X
package does not include a keyboard. The unit is guaranteed to support the
supplied keyboard but may be used with other standard 101 key AT-style keyboards.
However, the use of an AT-compatible keyboard from other manufacturers may
cause an increase in susceptibility to radio frequency interference.
If using a switchable keyboard, move the A-X switch on the back of the keyboard to
the "A" position.
Using an XT style keyboard or turning a switchable keyboard
to "X" mode may damage both the keyboard and the MFJ-498. This unit will
function only with AT compatible keyboards.
Plug the keyboard into the 5 pin
DIN connector marked KYBRD IN on the MFJ-498.
Iambic paddle
An iambic or single lever (dual contact) paddle
connects to the 1/4" stereo phone jack with a
shielded cable through the back of the unit.
Connect the dot wire of the paddle to the ring on
the plug and the dash wire to the center conductor.
The shield on the plug should be attached to paddle ground.