A logic Analyser has a specific number of inputs to be connected with the circuit to be analysed.The cards with our programme support either 16 or 32 channels which means,depending on the card,upto 32 channels can be recorded at the same time.This happens with a sampling frequency ,again depending on the card,of upto 200 MSamples per second.This way,values in 10 ns/div could be recorded.The duration could be appropriated externally as well as internally so that,for example,a synchronisation of the recording with the system duration of the measuring object is possible.The acquisition can be initiated with a specific pattern (Trigger) whereas it is also possible to keep hold of the recorded data before triggering (Pre-Trigger).Our Logic Analyzers offer a memory depth of 32K,which means that altogether 32786 measurements with upto 32 channels could be temporarily registered.A temporary register is required because the PC can not process the read-out measuring values with the same speed as recorded be the Logic Analyser.To further simplify the measuring of the circuits,we offer the active measurement supporter LOGAMV.This measurement supporter makes the separate installation of the measuring object and the Logic Analyser possible,thus making the signal acquisition more accurate.
The memory depth indicates how long a logic analyzer can buffer measured values.
Logic analyzers can be optimized and produced for different sampling rates. In this case, the sampling rate indicates how the device in the second can take many measurements at the most. A sampling rate of 100 MSamples per second means that measurements up to 100 million can be carried out in the second. Therefore, always choose a logic analyzer whose sampling rate lets sufficient open space for the actual clock speed of the system to be measured. If you use the intern clock generation, as at least ought the recording time that three- conducted to five times the ones the time of the object of measurement.
Recording of the logic analyzer can be started by pressing a key. However, it is also possible to let it release automatically to a specific bit pattern there (trigger condition). One designates a such releasing automatism as a trigger.
Want to pursue the signal response of an object of measurement before a specific event occurs (for example before one transfer transmission signal), in such a way, you have the possibility, to reserve a part of the storeroom of the logic analyzer for time before the triggering event. You can in general adjust this storeroom part in dividing steps and in such a way, determine it.
The time in which recording occurs. A time of 100 MHz it corresponds to a sampling rate of 100 MSamples per second.
The recording time can also be undertaken directly by the object of measurement. Clock generation is very flexible here: It can occur directly through a TTL entry or through a specific bit pattern on channels 0 to 3. As a result, you can adapt exact the recording time to your measuring requirements.
A bit pattern is a state which should queue up at the channels of the logic analyzer. In this case, you can default individual channel for each whether he should be high or low or whether its state should not be considered. A such bit pattern can be needed in order to trigger recording, therefore, start recording in the case of a specific bit pattern.
Object of measurement:
The switching which should be combined with the logic analyzer (and/or with the amplifier) is the object of measurement. Circuits which are not built up in Standard-TTL technology can also be analyzed with an optional amplifier.
We supply our convenient "Logic-Analyze"-Software for Windows freely with every logic analyzer.