Cw Key/Paddle And Computer Keying Interface Suggestions - Yaesu FT-920 Operating Manual

4. CW Key/Paddle and Computer
Keying Interface Suggestions
Features
The FT-920 includes a host of features for the CW
operator, the functions of which will be detailed in the
"Operation" section later. These include:
 A built-in electronic keyer with message
memory;
‚ A front-panel K
paddle; and
ƒ A rear-panel K
to another keyer paddle or a straight key, TNC,
or computer CW keying interface (for use with
contest software, etc.).
Both K jacks on the FT-920 utilize "positive" key-
EY
ing voltage. Key-up voltage is approximately +5V DC,
and key-down current is approximately 0.5 mA. When
connecting a key or other device to the K
use only a 3-pin ("stereo") ¼" phone plug; a 2-pin
plug will place a short between the ring and
(grounded) shaft of the plug, resulting in a constant
"key-down" condition in some circumstances.
18
jack for connection of a keyer
EY
jack which may be connected
EY
jacks,
EY
Configuration Suggestions
 For everyday operation using the internal elec-
tronic memory keyer, connect your paddle to the
front panel K jack, and activate the front panel
EY
K switch. If you wish to keep the keyer
EYER
paddle's cable out of the way, connect the plug,
instead, to the rear panel K
rear-panel P -K switch to P
DL EY
‚ If two operators are using the FT-920 simulta-
neously (for a contest, Field Day, etc.), a second
keyer paddle may be connected to the rear panel
K jack. Be sure that the rear panel's P
EY
switch is set to P so that both operators have
DL
access to the internal electronic memory keyer,
and switch the front panel K
ƒ If two operators are using the FT-920 simulta-
neously, but both wish to use a straight key, "bug,"
or an outboard electronic keyer, the key plugs may
be inserted into the front and rear panel K
now turn the front panel's K
spective of the setting of the P
tip connections on both Key plugs will serve as
"Straight Key" lines for accommodating this appli-
cation.
„ If you are using a computer-driven CW keying in-
terface (with contest software), but want to be able
to send occasional "repeat" messages quickly
using the FT-920's internal keyer, connect your
keyer paddle to the front panel K
keying interface line (which emulates a straight
key) to the rear panel K
tion, set the rear panel's P
K position, which re-configures only the rear
EY
panel's K jack to accept a "Manual" keying line.
EY
Note that the rear-panel K
EY
ity to support an external PTT line, if provided by your
external keyer, TNC, or computer keying interface.
FT-920 Operating Manual
jack, and set the
EY
.
DL
-K
DL EY
switch on.
EYER
jacks;
EY
switch off. Irre-
EYER
-K switch, the
DL EY
jack, and the
EY
jack. In this configura-
EY
-K switch to the
DL EY
jack carries the capabil-