When an incorrect command is sent to the 
tester, the Err indicator will be displayed on the 
screen indicating there is an error in command. 
When the instrument is remotely controlled all 
panel keys except the STOP button are disabled. 
Receive a stop signal from either mode of 
Control By (Front Panel, Remote, SIGNAL IO), 
while the RMT indicator is displayed, or simply 
send a RMToff command (page 259) to return 
the instrument back to the READY status. 
To put the tester back to the RMT, simply issue 
another remote control command.