8-16
Preset State and Memory Allocation
Memory Allocation
The analyzer attempts to allocate memory at the start of a calibration. If insufficient
memory is available, an error message is displayed. It is possible that the CMOS memory
might be fragmented due to the sequence of saving and deleting states of various sizes. So
another alternative would be to store the current state to disk and then press
. The
analyzer runs a memory packer which might regain some previously inaccessible memory.
If memory is still inadequate, delete an instrument state and restart the calibration.
Table 8-5 Memory Requirements of Calibration and Memory Trace Arrays
Variable
Data Length (Bytes)
a
Approximate Totals (Bytes)
401 pts
801 pts
1601 pts
1 chan
1 chan
2 chans
Calibration Arrays
Response
Response and
isolation
1-Port
2-Port
Interpolated cal
N
×
6 + 52
N
×
6
×
2 + 52
N
×
6
×
3 + 52
N
×
6
×
12 + 52
Same as above in addition to
regular cal
2.5 k
5 k
7 k
29 k
5 k
10 k
14 k
58 k
10 k
19 k
29 k
115 k
19 k
38 k
58 k
230 k
Power Meter Cal
b
(N
c
×
2
×
number channels
d
) +208
1 k
1.8 k
3.4 k
6.6 k
Measurement Data
Memory trace array
N
×
6 + 52
2.5 k
4.9 k
9.7 k
19 k
Instrument State
e
6 k
6 k
6 k
6 k
a. N = number of points
b. This variable is allocated once per active channel.
c. The number of points that was set at the time the cal was turned on.
d. If the channels are coupled, this number is always 1. If the channels are uncoupled, this
number refers to the number of channels that have power meter cal on.
e. This value may change with different firmware revisions.
Preset
Summary of Contents for 8719ES
Page 6: ...vi ...
Page 10: ...Contents x Contents ...
Page 11: ...1 1 1 HP 8719 20 22ES Specifications and Characteristics ...
Page 60: ...1 50 HP 8719 20 22ES Specifications and Characteristics Instrument Specifications ...
Page 61: ...2 1 2 HP 8719 20 22ET Specifications and Characteristics ...
Page 98: ...2 38 HP 8719 20 22ET Specifications and Characteristics Instrument Specifications ...
Page 99: ...3 1 3 Front Rear Panel ...
Page 111: ...4 1 4 Menu Maps ...
Page 113: ...4 3 Menu Maps Menu Maps Figure 4 2 Menu Map for Copy ...
Page 114: ...4 4 Menu Maps Menu Maps Figure 4 3 Menu Map for Display ...
Page 115: ...4 5 Menu Maps Menu Maps Figure 4 4 Menu Map for Format Figure 4 5 Menu Map for Local ...
Page 116: ...4 6 Menu Maps Menu Maps Figure 4 6 Menu Map for Marker Marker Fctn and Marker Search ...
Page 118: ...4 8 Menu Maps Menu Maps Figure 4 9 Menu Map for Power and Sweep Setup ET only ...
Page 119: ...4 9 Menu Maps Menu Maps Figure 4 10 Menu Map for Power and Sweep Setup ES only ...
Page 120: ...4 10 Menu Maps Menu Maps Figure 4 11 Menu Map for Preset ...
Page 121: ...4 11 Menu Maps Menu Maps Figure 4 12 Menu Map for Save Recall ...
Page 122: ...4 12 Menu Maps Menu Maps Figure 4 13 Menu Map for Scale Ref ...
Page 128: ...5 1 5 Hardkey Softkey Reference ...
Page 194: ...6 1 6 Error Messages ...
Page 222: ...7 1 7 Options and Accessories ...
Page 234: ...8 1 8 Preset State and Memory Allocation ...
Page 253: ...8 20 Preset State and Memory Allocation Memory Allocation ...
Page 254: ...9 1 9 Understanding the CITIfile Data Format ...
Page 269: ...9 16 Understanding the CITIfile Data Format Useful Calculations ...
Page 270: ...10 1 10 Determining System Measurement Uncertainties ...
Page 281: ...10 12 Determining System Measurement Uncertainties Measurement Uncertainty Equations ...