Specifications

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tuned condition. When the tuning algorithm is complete, the CPU
saves the settings in its EEPROM, which is addressed by the
applied RF frequency. This non-volatile memory table is the basis
of the exclusive learning feature of the MAC-200.
After it has stored and latched the network status, the CPU waits
for RF to cease transmitting and returns to the Stop mode. When
RF is re-transmitted, the first step in the tuning algorithm is to
measure the frequency of the signal passing through the coupler.
From the frequency data, the computer then searches its EEPROM
for previously stored data. If data is found, it is tested for validity,
and the required “end of tune” conditions will be sensed by the RF
sensors. Then the data will be latched in place, and the CPU will
again wait for RF to cease transmitting and turn to the Stop mode.
This process takes about 10 milliseconds, which is the same length
of time that is required to close the network relays.