MFJ Memory Keyer MFJ-493, Инструкция по эксплуатации

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MFJ-493 Instruction Manual
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Connections
Power
A 12 VDC 500 milliamp power supply should be used with the MFJ-493. The power jack accepts a
2.1 mm coaxial plug with the center conductor positive. An optional DC supply, the MFJ-1315, is
available from MFJ. Connect your MFJ-1315 Power Adapter or compatible DC supply (coaxial line
with shield ground) into the power jack on the MFJ-493.
Keying
This unit supports both positive and negative keyed radios. Connect a standard shielded RCA cable
between your radio key input and to the MFJ-493's Direct output for positive keyed radios (most
solid state radios) or to the Grid-Block output for negative keyed radios (most radios with tube fi-
nals.)
Paddle
An Iambic or single lever (dual contact) paddle connects to the stereo phone jack with a shielded
cable through the back of the unit.
Note: The features of this unit are not usable with a
straight key. 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 the paddle ground.
Keyboard
The keyboard port accepts most standard IBM-AT style keyboards. The MFJ-551 keyboard is guar-
anteed to be fully compatible with the keyer and available for $39.95 from MFJ.
Switching any
keyboard to "X" or “XT “mode may damage both the keyboard and the keyer.
Keyer Terminal
The serial port on the back of the unit accepts a DB-9 plug. Only three pins are used: pin 2, pin 3,
and pin 5. Pin 2 is the receive data line, pin 3 is the transmit data line, and pin 5 is common. Con-
nect pin 2 to the transmit data line on your computer. Connect pin 3 to your computer's receive
data line. Connect pin 5 to your computer's RS-232 port ground. To connect an MFJ-493 to an
IBM-PC compatible you can order a cable from MFJ for $12.95. Order MFJ-5409 for connection to a
9 pin serial port or MFJ-5425 for connection to a 25 pin serial port. Your computer will need a ter-
minal program to talk to the keyer. Set your terminal program to 1200 baud, 8 data bits, no parity
and 1 stop bit
, xOn/xOff flow control .
Remote
The last port in the back of the unit is for the optional remote control. The remote control gives
you remote access to the keyer menu if the main unit is out of reach. The remote has each of the
menu buttons and mounts on your Bencher type or MFJ-564 Paddle. The remote connector com-
bines both the remote functions and the paddle jack so that only one cable from the paddle to the
keyer is needed.