GW Instek PPH-1503 - Manual (Page 71)

REMOTE CONTROL
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H. Press the Menu key to exit and return
to the main menu.
Exiting from
Remote Control
Mode  Send a remote command to exit from
remote control mode from the PC or
long-press the unlock key on the front
panel to exit from the remote control
mode. The RMT icon in the status bar
will becomes greyed-out when you
exit from remote control mode.
 The LOCK icon becomes greyed-out
when the panel becomes unlocked.
 Unplug the connection from the rear
panel.
RMT
LOCK