NEC NP-PX700W Command Manual page 40

Command example:
* Sending the AUTO key code
02H 0FH 00H 00H 02H 05H 00H 18H
* Sending the AUTO (SHORT) key code
02H 0FH 00H 00H 02H DDH 00H F0H
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* cycle/toggle volume mute
* cycle/toggle picture mute
* cycle/toggle picture freeze
02H 0FH 00H 00H 02H DATA01 DATA02 CKS
Data Portion Contents
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DATA01/DATA02 12H/00H : Volume mute
DATA01/DATA02 11H/00H : Picture mute
DATA01/DATA02 8AH/00H : Picture freeze
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* cycle aspect ratio
02H 0FH 00H 00H 02H DATA01 DATA02 CKS
Data Portion Contents
--------------------------------------------------------------------
DATA01/DATA02 A3H/00H : Aspect Ratio
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* all menu functionality (digits 0-9, cursor movement, enter, select, return, back, clear, etc)
02H 0FH 00H 00H 02H DATA01 DATA02 CKS