Agilent Technologies E1439 User Manual page 101

AGE1439_BLOCKSIZE_MAX
AGE1439_BLOCKSIZE_DEF
The range of available block sizes depends on the number of bytes required for each sample. The
command accepts any number between 2 and memory size (in bytes) × 2/3. If the requested block
size falls outside the range shown in the table the previous valid value is used and a status register
flag (bit 6) is set indicating a setup error. The blocksize is updated after the setup is changed to be
valid.
For real data blocksize is the number of real data values per data block. For complex data
blocksize is the number of complex data pairs per data block.
The following table summarizes the available block sizes for each setting of the dataType, and
resolution parameters.
Note
Block size must be an even number. Considerably more samples may need to be taken in order to
set the block available status bit.
blocksizePtr points to the current value of the blocksize parameter. The returned value is the closest valid value
to the requested block size.
dataDelay is used to specify the minimum FIFO delay in number of samples. This parameter applies only in
continuous mode.
AGE1439_DATA_DELAY_MAXsets the maximum allowable delay.
AGE1439_DATA_DELAY_MIN
dataDelayPtr points to the current value of the delay parameter.
dataType determines whether the Agilent E1439 collects and returns real or complex data.
Setting this parameter to
each sample
AGE1439_COMPLEX
sample.
Normally, if the center frequency set with the age1439_frequency_setup function is zero, the
type should be set to AGE1439_REAL since the imaginary component of each sample is zero
anyway. When non-zero center frequencies are used the type should normally be set to
AGE1439_COMPLEX, otherwise the imaginary component of the signal is lost.
selects the maximum blocksize.
sets the default blocksize.
data type resolution
real 12
real 24
complex 12
complex 24
1. Parity memory is used in non-parity mode, so 2M× 72
bit memory yields 18 Mbytes of FIFO storage.
sets the minimum allowable delay.
AGE1439_REAL
causes the real data followed by the imaginary data to be returned in each
Agilent E1439 Programmer's Reference
max block size
in Msamples
min. block size
(2 M*72 memory)
6
3
3
2
causes only the real part of the data to be returned for
Functions listed alphabetically
1
12
6
6
3
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