4. HOW TO USE
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4.5
Configuring the LT 4441/4442
4.5.1
Enabling the Key Lock
The LT 4441/4442 locks its keys after 1 minute of inactivity (no key operations). When the
key lock is ON, front-panel key operations are ignored.
To perform front-panel key operations, turn the key lock OFF. Press the KEY LOCK key to
turn the key lock ON or OFF.
Figure 4-10 KEY LOCK
4.5.2
Switching the Output Signal
Under SYNC SOURCE, the LED that is lit shows which signal (primary or backup) is being
transmitted from the output connectors. The output signal setting is the same for channels
1 to 11.
Also, you can press the key to manually switch the output signal. However, you may not be
able to switch the signal depending on the state of the LT 4441/4442. For details, see Table
4-8, “LT 4441/4442 operations.”
SYNC SOURCE is set to PRIMARY when the LT 4441/4442 turns OFF or ON.
Figure 4-11 SYNC SOURCE
