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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

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