B&K Precision 4079 - Manual - Manual (Page 44)

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User can return to local control with the press of any front panel keys, but it is extremely important to note that this
should be done ONLY when nothing is being sent or transferred between the instrument and the connected PC. Any
interruptions during transfer may delay the communication process, and in some cases freeze the instrument. For large
waveforms transmission, be it sending or receiving, please allow at least 15 seconds before pressing any front panel keys
to return to local mode. The instrument needs the additional time to completely generate or send the waveform.
The instrument accepts a carriage return (CR) as an end of string (EOS) terminator and sends both a CR and LF as the EOS
terminator.
4.2 Device State
The device may be in one of the four possible states described below. The transition between states is defined by IEEE 488.1.
4.2.1 Local State (LOCS)
In the LOCS the device may be operated from the front panel only. Its settings may be queried over the GPIB, but not
changed. Commands that do not affect the signal being output by the instrument are accepted.
4.2.2 Local With Lockout State (LWLS)
In the LWLS the device may be operated from the front panel only. Its settings may be queried over the GPIB, but not
changed. Commands that do not affect the signal being output by the instrument are accepted. The difference between the
LOCS and the LWLS is that from the LWLS the device may enter the Remote With Lockout State.
4.2.3 Remote State (REMS)
In the REMS the device may be operated from the GPIB. Actuating any front panel key will cause the device state to revert
to the LOCS.
4.2.4 Remote With Lockout State (RWLS)
In the RWLS the device is operable only from the GPIB. Front panel operation may be returned by either sending an
appropriate IEEE 488.1 command, or by cycling the device power.
4.3 Interface Function Subsets
The following interface function subsets are implemented in the MODEL 4076 and 4079: