Stanford Research Systems SR780, Operating Manual And Programming Reference

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Data Transfer Commands 5-99
SR780 Network Signal Analyzer
Serial Poll until IFC (bit 7) is set in the Serial Poll status before sending another
command.
WPUT ?
The WPUT command downloads Waterfall buffer data to the SR780. This
command is valid only via the GPIB interface.
The download data must be data which was originally uploaded by WGET in its
entirety. The WGET and WPUT commands allow a host computer to save and
reload the Waterfall buffer without using disks.
The download sequence is as follows:
Host
Send WPUT ?. Do NOT wait for IFC to be set in the Serial Poll status.
SR780
Returns 1 (4-byte binary long int) when OK to begin binary transfer to the
SR780. A return of 0 indicates that there is no Waterfall memory allocated.
Host
On receipt of 1 (4-byte binary long int), executes a binary transfer to the SR780
of n bytes (as uploaded using WGET). Asserts EOI with the final byte of the
transfer.
SR780
Receives n bytes and the EOI. If an error is detected during transfer, the
Waterfall buffer reverts to the empty state and a command execution error
occurs. This may occur if there is insufficient Waterfall memory allocated.
Serial Poll until IFC (bit 7) is set in the Serial Poll status before sending another
command.
Loading the Waterfall buffer loads data into the waterfall buffer and recalls the
measurement parameters which were in effect when the waterfall buffer was
saved. The recalled parameters include items in the [Frequency], [Display Setup],
[Display Options], [Average], [Window], [User Math], and [Waterfall] menus.
The Waterfall Storage is set to Recalled. Recalled simply means that the waterfall
displays contain data which did not come from the two inputs but rather from
disk.
Recalled waterfall data is not protected in any way! The recalled waterfall data
behaves as if the measurement was paused. Pressing [Start/Reset] or changing
any measurement parameter which normally causes the waterfall buffer to reset
and take new data will
destroy the recalled data! The recalled data is available
for viewing and hardcopy only.