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NOTES:
1. Any parameters that you change within a command string will return to the values you last set
from the keypad when the keyer returns to the NORM al mode.
2. You should avoid using extra digit keys in a command buffer since they waste buffer space.
SELF DIAGNOSTICS
Each time you turn the keyer on, a checksum is performed on the contents of the program in
ROM. If this test fails, a steady sidetone will sound and all of the LEDs will light.
When you turn the keyer on for the first time following a battery replacement, a test is run by the
keyer on RAM. If this test is successful, the speed and spacing are both initialized to 20 WPM, the
weight is set to normal, the repeat count set to zero and all the buffers are cleared. If a bad cell is
found, the sidetone will sound a steady tone and no LEDs will light.
RESETTING THE KEYER
When you press the P/C and STOP keys simultaneously*, the the diagnostics for RAM and ROM
are performed. All the buffers are cleared and the keyer is initialized as in the previous paragraph.
REVERSE PADDLES
When you press the LOAD and SEND keys simultaneously*, the keyer circuitry toggles between
right-handed and left-handed operation. The keyer always powers up in the right handed mode un-
less you have the left-handed wiring option.
*NOTE: If you press one key slightly ahead of the other, the first key you press will be recognized
as a single closure and will begin to perform its normal function, or cause the sidetone to warble if
it is not a legal key for the current mode. The two keys must be held down long enough so they
can be recognized as a pair. When you release the keys, the keyer will return to the NORM al
mode.
USING THE PADDLES
The keyer comes with two paddles. When you activate one of the paddles, a string of properly
spaced, self-completing dashes is produced as long as the paddle is held. The other paddle pro-
duces a string of dots in the same manner. The operation of the paddles is the same as on the
older keyers; moving in one direction produces dots and the other direction produces dashes. The
SA5010A will operate the same as a single-paddle keyer if you treat the two paddles as one.
The Main advantage of dual paddles over a single paddle is that both may be activated simultane-
ously to produce a string of alternating dots and dashes. The paddle you touch first determines
whether a dot or a dash will occur first. This result is called "iambic" operation, which is a term de-
scribing the timing of poetic verse. The keyer can remember a dot paddle closure during the send-
ing of a dash and vice versa.
These dot and dash closure memories allow you to insert a dot into a string of dashes by activat-
ing the dot paddle during the dash it is to follow. You may insert a dash into a string of dots in the
same manner. You can send many characters with less effort when you take advantage of this fea-
ture. For example, to send the letter "C" (–·–·), a single paddle keyer would have to move left,
right, left, right. With an iambic keyer, both paddles are activated together with the dash paddle
slightly ahead of the dot paddle. The paddles are released during the second dash. (The last dot
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