Agilent Technologies 93000 SOC Series Training Manual page 385

of the analog module's frequency divider and Fs range.
Analog Module
WDB
WDE
WDA
WDD
SPA
SPB
WGA
WGE
WGB
WGD
WGF
*
The Nmin value applies for the minimum master clock frequency of 200MHz and the
Nmax value for the maximum frequency of 500 MHz. The equation Fs = MCLK/N must
always result in an Fs value in the module's Fs range.
If the Clock Mode is Auto, the software also calculates a suitable
Clock Value to achieve an Fs as close as possible to the desired Fs.
If the Clock Mode is Fixed, the generated Fs may differ from the
desired Fs, because only the integer divisor N can be chosen.
If you enter a value for N, you define a fixed ratio between the
Clock Value and Fs.
Note: If the Clock Mode is Auto and the Clock Value for the analog
domain has not yet been set by another module, you must also
specify the desired Fs.
Select a Rule
8
Auto (Fs): Find the best approximation of Fs to the desired Fs by
selecting N and, if the Clock Mode is Auto, also select a suitable
Clock Value.
Fixed Fs Value: Generate the desired Fs precisely, no
approximation is accepted.
Fixed N Value: Always make Fs the Nth part of the Clock Value.
Click Add/Change
9
This button is labeled Add when creating a new setup for an analog
module. It is labeled Change, when editing an existing setup.
Clicking the button creates the clock domain setup for the selected
Instrument (analog module). The setup definitions will be entered
in the table of the Clock Domain Setup page. If the Auto Check box
is enabled, also the domain check (see step 10) will be performed,
when clicking Add/Change.
Click Check Domain (only needed if Auto Check is not enabled)
10
This calculates the final Fs for the module and, depending on the
selected rule, also the Clock Value and N. The software will at the
same time checks whether all settings are in compliance with the
clock domain and module properties (e.g. the valid N range), and,
Lesson 2 – Analog Clock Domain Setup
Nmin - Nmax *
98 – 62500
40 - 4000
5 - 500
1 – 500 (4 – 500 for sampler mode)
200 - 62500
20 - 5000
196 - 62500
7 - 62500
2 - 62500
1 - 61440
N must be set to -16, -8, -4, -2, 1, 2, 4 or 8.
(-16, -8, -4 and -2 mean 1/16, 1/8, 1/4 and 1/2)
385