These options are each available as a separate purchase to enhance the functionality of the MI60xx & 61xx series boards. Please contact Dataquest Solutions for pricing information.
| Synchronisation | Synchronisation by star hub | Multiple replay | Gated replay | Synchronous digital outputs | Extra I/O |
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 Star Hub is an additional module for all MI boards. It allows synchronisation up to 16 boards with no phase delay between them. With this option, multi-channel acquisition systems of up to 128 channels are possible, as well as a combination of input and output boards, or analogue and digital boards.
Across the star hub, clock and trigger information are exchanged between the boards. All connected boards use the same clock and trigger. One board is defined to be the master board and generates clock. This master board or another board may be used to generate the trigger for all connected boards.
Download Star Hub information [PDF Data sheet]
Multiple Replay allows the playing segments of user-defined board or PC memory data in response several trigger events without having to restart the hardware. By this method data can be output cyclically, or from start to end without repeat. A quantifiable delay of a few samples does occur between trigger and start of play, this depending on factors such as sample rate.
The option Gated replay allows recording
of a signal controlled by an external gate signal. Data is only
played if the external gate signal is equal to a programmed
level (TTL HIGH or TTL LOW). As with the Multiple Replay option
(see above) a delay of a few samples between trigger and recording occurs.
The digital outputs occupy the upper 2 bits of each 14 bit analogue analogue output. Accessed by the connector as shown below, an additional slot at the back of the PC is required.
N.B this option is not available on the 8 bit versions for the board (Mi.6110 and Mi.6111).
The extra I/O module offers 24 additional digital I/O and 4 additional analogue outputs to all boards of the MI series. The signals are available from an extra connector. All additional lines are independent of the MI board and may be asynchronously set at any time. There is an internal version of this option with 16 digital i/o only. These signals are available from an optional internal flat ribbon connector.
Application examples:
Download extra I/O data sheet. [PDF data sheet]
© Spectrum GmbH 20.01.2003
Modified by Dataquest Solutions 2003