4. HOW TO USE
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4.5.7
Setting the Operation Mode, Standby Time and Fault information
● Setting the Operation Mode
Normally, you can use the front-panel SYNC SOURCE key to switch the output signal,
but when faults are detected in either of the input signals (primary or backup), you cannot
switch to the fault signal.
If you set the operation mode to OVERRIDE, regardless of the state of the input signals,
you can use the SYNC SOURCE key to switch the output signal. However, this setting is
valid when AUTO SWITCHING is set to DISABLED. If AUTO SWITCHING is set to
SWITCH FAULT, even if you set the operation mode to OVERRIDE, you cannot switch to
the fault signal.
The factory default setting is NORMAL. Leave this set to NORMAL under standard
operating circumstances.
Reference
For details on the SYNC SOURCE key, see section 4.8.2, "Switching the Output Signal."
For details on the AUTO SWITCHING key, see section 4.8.3, "Setting Automatic Signal
Switching."
● Setting the Standby Time
You can select the length of time that the LT 4448 waits from the time that it turns ON to
the time that it begins operating. Select a setting that is appropriate for the rise time of the
system signal source that you are connected to.
The factory default setting is approximately 2 minute.