Agilent Technologies 8719D User Manual page 633

of 2MBytes available. (For information on special option H02, which increases the amount of
available memory to 2 MB, contact your HP sales associate.)
If you have deleted registers since the last time the instrument was preset, the bytes available
for you to use may be less than the actual "bytes free" that is displayed. Deleting registers
to increase the available memory will work in cases where the registers being deleted and
the registers needing to be added are of the same standard size (such as instrument states not
having calibrations associated with them). In certain other cases, however, you may have to
press B after deleting registers so that the "bytes free" value equals the available memory
value. During a preset, the analyzer rtms a memory packer that de-fragments the free memory
into one contiguous block.
to help you approximate memory requirements. For example, add the following memory
requirements:
a full 2-port calibration with 801 points (58 k)
n
the memory trace array (4.9 k)
n
the instrument state (approximately 6 k)
l
The total memory requirement is 68.9 kbytes. There is sufficient memory to store 29
calibrations of this type. However, the same calibration performed with 1601 points and 2
channels uncoupled would require 255 k bytes:
a full 2-port calibration with 1601 points, two channels, uncoupled (230 k)
l
the memory trace array (19 k)
n
the instrument state (approximately 6 k)
n
Only 2 of these calibrations could reside in memory before the available memory would be
depleted.
Memory Requirements of Calibration and Memory Trace Arrays
Variable
Calibration Arrays
Response and Isolation
l-Port
X-Port
Interpolated Cal
Power Meter Cd
Memory Trace Array*
This variable is allocated once per active channel.
refers to the number of channels that have power meter Cal on.
Approximate 'lbtals (Bytes)
401 pts 801 pts 1601 pta
10 k
10 k 19 k
29 k 115 k
l k 1.8 k 3.4 k
2.5 k 4.9 k 9.7 k
19 k
38 k
58 k
230 k
6.6 k
19 k