3300/25 Dual Accelerometer Input Monitor Operation Manual
76
5.
Calculate the multiplier value
M
. In this case:
57
.
32
=
188
.
19
625
=
M
6. Convert
M
to the closest 8 bit binary integer. The closest integer to 32.57 is 33,
and the 8 bit binary representation is 00100001.
M7
is the most significant bit
(MSB)
, and
M0
is the least significant bit
(LSB)
.
7.
Set the jumpers for the anti-aliasing corner frequency,
f
AA
, according to the Anti-
Aliasing Corner Frequency Jumper Table shown earlier in this section.
On the Filter Board
Install:
W70,W71,W72,W73,W75, and W77
Remove:
W56,W57,W69, and W74
8.
Set the low-pass corner frequency. Step 1 tells you to select a value for clock
frequency
f
CLK
beginning with
f
CLK
= 3.58 MHZ.
9.
Calculate the divider ratio
D
.
716
=
125
×
40
3580000
=
D
10.
Look at the Divider Ratio Table to find a match to the divider ratio
D
that was
calculated above. There is not a match for
D
= 716 within ±1 in the Divider Ratio
Table so select
f
CLK
= 2 MHZ.
11. Calculate
D
with
f
CLK
= 2 MHZ.
400
=
125
×
40
2000000
=
D
There is not a match for
D
= 400 within ±1 in the Divider Ratio Table so select
f
CLK
= 1
MHZ.
