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quantitative results, you will also have to retrieve that separately (see A.5.4.17 RDR?). If you wish to
associate this information with a data frame, be sure to specify the same frame number for the data
and status/results.
Three commands allow you to download raw data or data at the cursors from any frame including the
reference and gain frames. These commands are:
RCC? - Download data in the column at the cursor
RCR? - Download data in the row at the cursor
RDD? - Download a frame of data
The LBA-PC may also be configured to automatically send a RDD? response each time a new frame of
data is acquired (see A.5.4.16 RDD?).
10.6.1.1 RCC?, RCR? - Read Cursor Transfer
To download data at the cursors from the LBA-PC, you must send the RCC? or RCR? command
with optional parameters that identify which frame and column or row, as appropriate, you are
requesting to transfer.
The frame parameter is optional and is numbered from -1 to n. ‘n’ is the number of frames in
the frame buffer. Frame -1 is the Gain Frame, 0 is the Reference frame, and frames 1 to n are
data captured in the frame buffer. If you do not send the frame number parameter then the
current frame is used.
The column or row, counted from the upper left corner of the beam window, parameter is
optional and is numbered from 1 to n. ‘n’ is the frame width or frame height, respectively. If
you do not send a column or row parameter then the current cursor location is used.
The data at the cursors is sent as a modified IEEE 488.2 Definite Length Arbitrary Block
Response Data. The number of bytes in a column or row is two times the number of pixels. For
example, a row of a 128 X 120 frame consists of 256 bytes and a column has 240 bytes. Each
pixel is a sixteen-bit two’s complement fixed point value having one of the following forms:
siiiiiii ifffffff LBA-300PC -256 to 255.9921875
siiiiiii iiifffff LBA-400PC -1024 to 1023.96875
siiiiiii iiiiifff LBA-500PC -4096 to 4095.875
siiiiiii ifffffff LBA-708PC -256 to 255.9921875
siiiiiii iiifffff LBA-710PC -1024 to 1023.96875
siiiiiii iiiiifff LBA-712PC -4096 to 4095.875
siiiiiii iiiiiiif LBA-712PC -16384 to 16383.5
Where:
s = sign bit
i = integer
f = fraction
Operator’s Manual LBA-PC
Doc. No. 10654-001, Rev 4.10
187