Additions for synchronizing different boards, Sumsamplerate, Samplerate – Spectrum Brands MI.20xx User Manual
Page 91: Actchpermodule, Syncspeed
Synchronization (Option)
Additions for synchronizing different boards
(c) Spectrum GmbH
91
Additions for synchronizing different boards
General information
Spectrum boards with different speed grades, different number of channels or even just different clock settings for the same types of boards
can be synchronized as well. To get the boards working together synchronously some extra setups have to be done, which are described in
the following passages.
All clock rates of all synchronized boards are derived from the clock signal that is distributed via the sync bus. This clock is the sum samplerate
of one module of the clock master board. Based on this speed the clock rates of the slave boards can be set. As these clock rates are divided
from the sync clock, the board with the maximum sum sample rate should be set up as clock master.
Calculating the clock dividers
The sum sample rate can easily be calculated by the formula on the right.
The value for the sample rate of board N must contain the actual desired
conversion rate for one channel of board N. Please refer to the dedicated
chapter in the board’s manual to get informed about the relation beween
the board model and the number of actually activated channels per mo-
dule for the different channel setups.
As mentioned above the board with the highest sum sample rate must be
set up as the clock master. This maximum sum sample rate is used as the
overall sync speed, which is distributed via the sync bus. If you have cal-
culated the sync speed you can calculate the clock dividers for the diffe-
rent boards with the formula on the right.
The maximum possible channels per module for all Spectrum boards are
given in the table below.
20xx
x
30xx
x
31xx
x
40xx
x
45xx
x
60xx
x
61xx
x
70xx
x
72xx
x
0x
7005
1
1x
3010
1
3110
2
6110
2
7010
1
7210
1
3011
2
3111
4
6011
2
6111
2
7011
2
7211
1
3012
2
3112
4
6012
2
3013
2
3014
2
3015
1
3016
2
2x
2020
2
3020
1
3120
2
4020
1
4520
2
7020
1
7220
1
2021
2
3021
2
3121
4
4021
2
4521
2
6021
2
7021
2
7221
1
3022
2
3122
4
4022
2
6022
2
3023
2
3024
2
3025
1
3026
2
3027
1
3x
3130
2
4030
1
4530
2
6030
1
2031
2
3031
2
3131
4
4031
2
4531
2
6031
1
3132
4
4032
2
2033
2
3033
2
6033
2
6034
2
4x
4540
2
4541
2
SumSampleRate
N
SampleRate
=
N
ActChPerModule
N
⋅
SyncSpeed