The CIMS Digital Recording and Analysis System (D-RAS) provides long term recording capabilities for analogue signals and the offline analysis of the recorded data. A D-RAS version is currently used as CORAL by DFS Deutsche Flugsicherung GmbH.
D-RAS allows to record between 1 and 4 analogue signals on a digital storage medium. The digital recording method prevents any degradation of the recorded signals.
After the recording the data can be evaluated by the D-RAS analysis facility. The analysis functions can be customised to satisfy any particular evaluation requirements. As a basic means an oscilloscope display is provided which allows to view arbitrary intervals of the recorded signals in the time domain.
Two channels can be viewed simultaneously.
Navigation elements allow to navigate through the hours of recorded data and view any particular interval.
By means of search functions particular events or times can be found in the data sets. Dedicated search functions for more complex signal patterns can be implemented in accordance with customer requirements.
Number: 2 (4 optional)
Impedance: 50 Ohms
(1 MOhm optional)
Input Range: 0 - 2.5 V
(+/- 1 V, +/- 2 V, +/- 5 V optional)
Resolution: 8 bit
(10 or 12 bit optional)
up to 5 hours (data reduction off)
up to 120 hours (data reduction on)
Start - Stop
Sample Rate: up to 20 MS/s
Exchangeable High Density Harddisks
The CIMS Data-Link/Processing Analyser (CDA) is a tool for analysing the data transfer or processing properties of communications and processing systems. Its open architecture supports interfaces to a wide range of systems. The currently supported interfaces include:
X.25 German PTT Datex-P PSN
X.25 via ARINC 429 / Williamsburg
V.24 text-oriented VHF data link
VDL Mode 2
In order to investigate the properties of a communications or processing system a CDA is connected at both the transmitting and receiving ends of the data-link. Since synchronisation is ensured by radio clocks (DCF 77 or GPS) it is not necessary that both ends be at the same location.
Script-files define test scenarios, so allowing a flexible definition and automatic tests over hours or even days. During the performance of a test run transmit- and receive events are recorded and stored in logfiles. Precise time-stamps permit all manner of subsequent evaluation.
The script- and log-files are structured ASCII files. Logfile post-processors are available for the evaluation of transmission latency, error rates, loss rates and throughput. Modules for customer specific post-processing may be readily integrated.
The CDA features a modular and open architecture consisting of an intuitive Graphical UserInterface (GUI), a test execution kernel and system-specific interface modules. The interface module executes as an independent task and communicates with the Text Execution Kernel by a procedural interface; the resultant decoupling ensures that any adaptation to a particular system is limited to the interface module.
The user interface is an X-client application and, if so required, may be operated from an X-Server elsewhere in the network.
The CIMS Data-link/Processing Analyser is currently available for PC-platforms under Sun Solaris and Linux. A port to Windows-NT is in preparation.