Maxim Integrated HFAN-09.5.0: Pattern Creator/Converter Software - Manual (Page 7)

Application Note HFAN-9.5.0 (Rev.1; 04/08) Maxim Integrated
Page 7 of 8
Table 2: Granularity Table (70841 / 70843)
Pattern Length (L)
(Bits)
Step Size
(Bits)
L < 32000 1
32000 L < 64000 2
64000 L < 128000 4
128000 L < 256000 8
256000 L < 512000 16
512000 L < 1024000 32
1024000 L < 2048000 64
2048000 L < 4096000 128
4096000 L 8000000* 256
*The Maxim pattern length for the 70841 is
4194304 bits
Table 3: Granularity Table (86130A)
Pattern Length (L)
(Bits)
Step Size
(Bits)
L < 128000 1
128000 L < 256000 2
256000 L < 512000 4
512000 L < 1024000 8
1024000 L < 2048000 16
2048000 L < 4096000 32
4096000 L 8000000 64
If the pattern does not meet these requirements, the
pattern generator may not recognize the file. The
software will verify the pattern length when doing a
conversion. If an error is found in the pattern length
a message box will appear (Figure 15) with the two
pattern lengths that meet the requirements that are
closest to the original pattern length. The pattern will
then need to be adjusted before the conversion can
take place.
Figure 15. Pattern Granularity Error
3.3 Additional Pattern Converter
Considerations
In addition to the items in sections 2.6 and 3.2, the
following items should also be noted when using the
pattern converter section of the software.
• It can take several minutes to convert a
pattern file that is over 2 million bits in
length.
• The software must first count the number of
bits in the file to verify that the pattern is the
correct type, and that it does not exceed the
maximum pattern length.
• PTRN and DAT file types should be used
when possible as they take up less disk
space.
• DAT files require specific filenames. The
number of the filename should be selected
before clicking the DAT button.
3.4 Example
To convert the pattern that was created in section
2.7:
1. Select the pattern generator that will be
used. For this example, we will assume the
generator is the Agilent 70843 series (Figure
16).
Figure 16. Converter Example Step #1
2. Set the pattern store number for the DAT
file type to any number between 5 and 12 by
clicking on the up/down buttons (Figure 16).
3. Click on the DAT button and find the binary
text file that needs to be converted and then
click on Open (Figure 17). After the Open
button is clicked, the program will count the
number of data bits in the file.