Operating instructions

LOCAL OPERATION
3-103
Logic line control
Additional control is provided to logic lines 0 and 1, from the two top soft keys on the left of the
logic line setup menu.
When set to ‘As setting’, the output will be as set by the right-hand soft keys.
When the ‘Line 0 Mode’ is set to ‘Close for Transmit’, the state of this line will depend upon
which operating mode the Service Monitor is set to.
When the Service Monitor is in the Rx TEST mode, line 0 will take up the ‘Closed/Logic High’
state, and the ‘Open/Logic Low’ state for all other test modes.
The ‘Press To Talk’ switch on the accessory microphone, if this accessory is fitted, will switch the
Service Monitor from Rx TEST mode to Tx TEST mode. Therefore line 0 will also change state
when the ‘Press To Talk’ switch is operated.
When the ‘Line 1 Mode’ is set to ‘Close on Squelch’, line 1 will take up the ‘Closed/Logic High’
state when the Service Monitor is in a squelched condition, and the ‘Open/Logic Low’ state when
the instrument is not squelched.