| Synchronisation | Multiple recording | Gated sampling |
Each of these three options are available as a separate purchase to enhance the functionality of the PCI248 and 258 series of boards. Please contact Dataquest Solutions for pricing information.
This option allows connection of up to 4 boards to generate a multi-channel system. It is also possible to build up synchronously mixed mode systems to record analogue channels and digital channels together. Boards of the same type may be connected with each other. It is also possible to connect Spectrum boards of different types where the sync-bus operates in the same, (for example all boards of the MI series).
On the internal sync-bus clock, trigger information is exchanged between the boards. All connected boards use the same clock and trigger. One board is defined to be the master board and therefore generates clock signals for all boards.
When using this kind of synchronisation there is a fixed phase delay between adjacent boards of 500 pico seconds. Another alternative without having this phase delay is the star hub. It allows connection of up to 16 boards of the MI series .
The option Multiple Recording allows the recording of several trigger events without having to restart the hardware. Events which repeat at a very high rate could be recorded with this option. a recording dead time immediately after each trigger event will occur in this mode, but typically only a few samples in length.
The memory of the board will be divided into several segments of the same size. Each segment will be filled with data when a trigger event occurs. Pre-trigger is not available when using Multiple Recording.
When using boards of the MI.xxxx series Multiple Recording could be combined with the Time stamp option to record the start time of a segment.
The option Gated Sampling allows recording
of a signal controlled by an external gate signal. Data is only
recorded if the external gate signal is equal to a programmed
level (TTL HIGH or TTL LOW).
As an option on some boards, the start and
end sample of a gate interval may be marked in memory.
When using boards of the MI.xxxx series Gated Sampling could be combined with the Time stamp option to record start and end of a gate interval.
© Spectrum GmbH 20.01.2003
Modified by Dataquest Solutions 2003