Elecraft K2 Owner's Manual - Manual (Page 100)

E
LECRAFT ® 99
CW Operation
The K2 provides a number of features for the CW operator:
 fast I.F.-derived AGC with fast/slow/off control
 full break-in operation with no relays
 accurate control of sidetone volume and sidetone pitch/offset
 memory keyer with Iambic modes A and B,
 nine programmable message buffers; chaining and auto-repeat
 software-selectable paddle selection (normal or reverse)
 multiple crystal filter bandwidths and opposite-sideband CW
 dedicated
S P O T
switch for accurate signal pitch matching.
 optional analog or digital audio filter
Several advanced CW features are covered in later sections:
 Fast-Play ("one touch") message buffers (page 107)
 Adjustable keying weight (page 107)
 "smart" CW signal scanning (page 103)
 FINE RIT for fine-tuning CW signals (page 106)
Keying Device Selection
A single connector in the back is provided for your keyer paddle, hand
key, keyer, or computer. It is also possible to connect both a paddle
and an external keyer or computer at the same time (see External
Keying Auto-Detect, below).
You must use a stereo (2-circuit) plug, even if you use only a hand key
or external keyer. This should not affect the use of the keying device
with other equipment, since the middle contact on the plug (often
called the "ring" contact) is only used with keyer paddles.
Hand key or External Keying Device: To use a hand key or external
keying device, select INP HAND using the menu. Use the "tip"
contact (DOT) of the key jack with a hand key or external keying
device. You can key the K2 externally at up to 70 WPM.
Internal Keyer: To use a keyer paddle, use the menu to choose I NP
P D L n
or INP PDLr (normal or reverse paddle). With PDLn
selected, the "tip" contact on the stereo key jack is DOT and "ring"
(the middle contact) is DASH. PDLr is the reverse.
External Keying Auto-Detect: If you wish to connect a handkey,
external keyer or computer along with a keyer paddle, you can use the
K2’s "auto-detect" feature. Simply connect your external keying
device to the DOT and DASH lines through two diodes as shown in
Figure 8-1, along with the keyer paddle. Be sure you have selected
I N P P D L n
or INP PDLR in the menu.
Figure 8-1
When you connect the keying devices in this way, you can continue to
use the paddle as usual. But if the external keying device is keyed,
both the DOT and DASH lines will be pulled low simultaneously via
the diodes. The K2 firmware interprets this as direct external keying
rather than as DOT or DASH triggers.
Auto Detect can be turned off if desired. Find the INP menu entry,
E D I T
the parameter, then tap
D I S P L AY
to select ADET OFF.
DO T DASH
GRO U N D
TO K2 KEY J ACK
PADDLE
HANDKEY,
COMPUTER,
OR EXTERNAL
KEYER
1N5817, 1N4148, etc.
GROUND
KEYLINE