HP 8920A Programmer's Manual page 228

Common Command Descriptions
*RCL (Recall Instrument State)
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The *RCL command restores the state of the Test Set from a file previously stored
in battery-backed internal memory, on a memory card, on a RAM disk, or on an
external disk. The *RCL command is followed by a decimal number in the range
of 0 to 99 which indicates which Test Set SAVE/RECALL file to recall. The mass
storage location for SAVE/RECALL files is selected using the
field on the I/O CONFIGURE screen.
The *RCL command cannot be used to recall files with names which contain
non-numeric characters or a decimal number greater than 99. To recall
SAVE/RECALL files saved with names which contain non-numeric characters or
a decimal number greater than 99, use the REG:RECall filename command (
"RECALL" on page 204
).
SAVE/RECALL
see