selections: (F will appear on the display)
Frequency readout method:
The method used for frequency readout maybe selected using these switches:
SPLIT switch
: Both Morse and display readout.
Tune Up switch:
Morse only readout. “MO” annunciated.
Tune Down switch:
LED Display only readout. “DO” annunciated.
To store the preferences you have selected, click the
MENU
switch.
A: Alternative paddle
(“A” on display and side tone)
This option allows using the Tune up and Tune down switches as a paddle. This option is a little clunky and
difficult to use, but it is useful if you want to save weight or have a problem develop with your external paddle in
the field. It will take some practice to get the hang of. The best method is to hold the tin with both hands and
send with your thumbs.
When the alternative paddle mode is active, the keyer code speed is selected using the frequency tune up and
tune down switches, as it would be in straight key mode. Code speed increments are at normal 1 wpm steps.
DFE mode can be used as can entering in keyer memories. Reverse paddle option does not affect the dot and
dash sense of these switches.
Selecting alternative or normal paddle modes:
Clicking the SPLIT switch toggles between these two modes. An “A” (alternative) or “N” (normal) is annunciated
indicating the mode selected. Escape and store by clicking MENU.
Toggling between receive and transmit modes:
There has to be a method of toggling the function of the tune up and down switches between normal frequency
tuning and transmitting. This is done by a short click of the SPLIT switch. A 't” will appear on the display when the
switches are in transmit mode. There is a ½ second delay after clicking the split switch before the mode toggles
between transmit or receive. This allows using the split switch to activate one of the keyer memories as would
normally be followed by a short click of the split switch.
Straight key mode:
Straight key mode is automatically detected and enabled when the rig is powered up when a monaural plug is in
the paddle jack. The sleeve of the mono plug grounds the dash input, which enables straight key mode. Straight
key mode also allows use of an external keyer if one so desires.
Operating voltages:
The ATS-3B has been optimized for operation at 9 volts, with a minimum operating voltage of 6 volts and a
maximum of 12.0 volts. Since power output is dependent on supply voltage, power output will vary from a low of
about 900 mw at 6 V and up to about 5 watts at 12 volts.
NOTE: Since there is no fuse or current limiting in the rig, it is a good idea to use an in-line fuse in the power
supply cord. A 1 amp fuse for supplies of 9 volts or less and 2 amp fuse for supplies above 9 volts.
HIGH SWR CAUTION: If operating the ATS-3B with supply voltages greater than 9 volts, please ensure there is
a low SWR load connected to the rig. High SWR conditions (especially those which are reactive) when operating
above 3 watts output may cause the PA stage to become unstable or cause the PA FETS to be damaged. Be
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