70 Chapter 3
Basic Operation
Using the Instrument State Registers
Using the Instrument State Registers
The instrument state memory is a section of memory divided into 10 sequences (numbered 0 through 9).
Each sequence consists of 100 registers (numbered 00 through 99). Instrument state sequences and registers
save and recall signal generator settings, and provide a quick way to reconfigure the signal generator when
switching between different instrument and signal configurations.
The signal generator with Option 005 (internal hard drive) has approximately 4 GB available for storing
instrument state files, as well as other user data. Without Option 005, the signal generator has 20 MB
available for data and instrument state storage. Instrument state files vary in length, depending on the signal
generator’s configuration.
Data, such as waveform files, arb settings, and table entries, are not stored in instrument state memory. Store
these data types to the signal generator’s memory. Instrument state memory only saves settings such as
frequency, attenuation, power, and so forth.
The following list shows additional signal generator settings that are not saved with the save operation.
Waveform data is stored in NVWFM. If you have a waveform file and want to save signal generator settings
associated with that file, you must first select the waveform in volatile waveform memory (WFM1). When
you save the signal generator settings associated with that file to instrument state memory, a reference to the
waveform file name will also be saved. Refer to “Storing and Loading Waveform Segments” on page 112
for information on saving waveform files.
For more information on storing file data, such as waveform files, arb setups, and table entries, refer to
“Storing Files” on page 69. Refer to the E4428C/38C ESG Signal Generator Programming Guide and the
E4428C/38C ESG Signal Generator Key and Data Field Reference for more information on the save and
recall function.
The following procedure demonstrates saving settings to the instrument state memory.
FM Deviation List Mode Freq Hostname FTP Server
RS-232 Baud Rate List Mode Power IP Address Web Server (HTTP)
Remote Language List Mode Dwell Subnet Mask Sockets SCPI (TELNET)
System Security Level List Mode Sequence Default Gateway VXI-11 SCPI
System Security Level Display Display State On/Off MAC
System Security Level State PM Deviation Manual DHCP
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