Specifications

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feed point impedance with frequency is particularly high. This will
be particularly common with High-Q, narrow bandwidth antennas.
4.5 Front Panel Reset-Lock operation
The LOCK button when engaged (the small LED next to the
button is on), tells the coupler to ignore all instructions to tune. It
will not react to a change in any sensor. All front panel buttons will
be locked out except for the POWER button and the meter range
selection buttons.
The RESET function, when pressed, resets all internal relays to a
position that connects the transceiver directly to the antenna.
The MAC-200 may be locked in BYPASS mode (straight through
to the antenna), by selecting MANUAL, executing a RESET, and
then using the LOCK function to lock the coupler.