HEKA Elektronik EPC 10 USB, Hardware Manual, Page: 15 / 81

2.5 Special Features of the EPC 10 USB 9
receive configuration commands. One can visually identify the ”active” amplifier by checking the Digital Bus light.
The green LED-light of the ”active” amplifier flickers when the digital lines are alive during command transmission.
The notion ”active amplifier” does not imply that the other amplifiers are not active. They remain fully functional,
but not enabled to receive programming commands.
2.5 Special Features of the EPC 10 USB
2.5.1 Timing of the AD-/DA-channels
Figure 2.4: Double Staggered Acquisition
Double Staggered Acquisition (EPC 10 USB using the LIH 8+8): The
EPC 10 USB
uses the double
staggered acquisition mode. To support cophasic acquisition of the two most relevant signals, e.g. the current
and voltage trace of the amplifier, two AD converters are used in parallel. That design results in supporting
cophasic acquisition for 2 AD channels. Also, there is no time delay between two DA channels firing and the time
of acquisition of two 2 cophasic AD channels. In the design of the LIH 8+8, time delays of 5 microseconds per pair
of AD channels will occur, when acquiring more than 2 AD channels.
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