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and stop automatically. If the Tune button is pressed and there is less than 0.1 watts of power, the
four front LEDs will flash to indicate that there was not enough RF to tune properly.
The Tune button has some additional functions when used in combination with other switches.
Pressing the Tune button and Ind Up switch together will set the High/Low impedance relay to the
High impedance position. The Tuning LED (red) will flash to indicate the change. Pressing the Tune
button and Ind Down switch together will switch the High/Low impedance relay to the Low
impedance position. The 1.5 SWR LED (green) will flash to indicate the change. This allows you to
manually adjust the match as needed. Again, you will rarely need to use this function; it is provided
for maximum flexibility. Note that even if you manually set the High/Low impedance relay, it will
automatically be reset as needed by the processor the next time the tuning cycle is started.
Back Panel Connections: The back panel has standard SO-239 jacks for connecting to the
antenna and transmitter; use standard PL-259 plugs. A coaxial power jack (5.5 by 2.5 mm, center
pin positive) provides DC power to the tuner. The power supply must provide between 11 and 20
volts DC at 200 milliamps for up to three seconds. If your transceiver or transmitter operates on 12
volts DC, the Z11 can be powered by the same source.
Another power option is two "9 volt" batteries in series, providing about 14 to 18 volts DC. For
rechargeable 9V batteries, you can expect to get about 500 tuning cycles on a charge. Regular 9V
alkaline batteries will last longer, but cannot be recharged.
Operation: Connect your transceiver or transmitter to the jack marked "Transmitter", and the
antenna to the jack marked "Antenna". Connect the power supply to the coaxial power jack. Your
Z11 is now ready to use.
Turn on the unit by placing the Power switch in the Power position (up). This initializes the
microprocessor; all four LEDs will flash once to indicate a successful power-up. If previously tuned
prior to the last power-down, the Z11 will retain the tuned state on power-up; the Z11 does not reset
on power-up.
Set the Auto switch to either Auto (up) or Manual (down) as desired. We recommend you start in
the Manual (down) mode until you become familiar with the Z11, and with your antenna.
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