advantage of any stored tuning settings, but automatically defaults to a Full Tuning cycle if no
stored data is available.
Press Tune > .5
second
Release
before red
LED goes
out (3 sec)
Memory Tune
Starts
Tuning Cycle Ends
Automatically
Function 3: Full Tuning Cycle (Long press)
Set your transmitter or transceiver to AM, FM, CW or Packet mode, and a power level of no
more than 125 watts if your radio has a power rollback circuit. If your radio lacks a rollback
circuit (see your owner’s manual), set the power level to no more than 10 watts.
Hold
for > 3
sec
Release;
full tuning
cycle starts
Red LED goes out Red LED on
Press Tune
Press the PTT switch on the microphone while in AM or FM mode (close key on CW) to transmit
a carrier. While transmitting a carrier, press and hold the Tune button on the front of your Z-100
for at least three seconds (the red LED will light when you press the button, then go out after
three seconds to indicate that you are in the full tune range of the Tune button. Release the Tune
button; the red LED will light and an automatic tuning cycle will begin. You will hear the relays
in your Z-100 as they switch in and out seeking a match; they make a buzzing noise. The tuning
cycle will end in a few seconds (red LED goes out); unkey your transmitter or transceiver and
reset to your desired mode and power − you’re ready to operate. The green LED will indicate the
SWR until the transmitter is un-keyed.
SWR Indication
During a tuning cycle the green LED indicates the approximate SWR. Steady green indicates an
SWR of 1.5 or less. Flashing green indicates an SWR between 1.5 and 2.5. If the green LED is
off when RF is present, it indicates an SWR greater than 2.5.
Note: After a tuning cycle and RF is removed, the Z-100 enters the sleep mode and the SWR
indicator no longer functions.
Off Mode
When any tuning cycle ends and RF is removed, the tuner automatically enters a “deep sleep”
state in which it draws nearly zero current; it is effectively off. The tuner will automatically
“wake up” the next time you start a tuning cycle. The latching relays will hold the tuned
configuration indefinitely, even when you unplug the power cable or turn off the transceiver
powering the tuner.
8
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