Agilent Technologies DC122 Manuel d'utilisateur télécharger pdf (Page 39)

5. Running the GeoMapper Application

5.1. Who needs a Geographical Map of Modules

The GeoMapper application gives the user the possibility of telling the Acqiris driver crucial details of the physical

position of modules when this information cannot be deduced directly. It allows the driver to correctly adjust trigger

and clock delays between the different modules of an AS bus 2 multi-Instrument and arrange the modules in an

intuitive order.

The GeoMapper application has been implemented as a Wizard with the goal of learning the physical position of

each module of a multi-bus system. The driver already knows the logical Bus and logical Slot numbers of each

Acqiris unit present. However, because of varying conventions for the compactPCI slot arrangement on a bus, this is

not sufficient to determine the physical position. Furthermore, with the aid of the map, the software can ensure that

the modules of an Auto-defined multi-Instrument will be ordered to correspond to increasing physical slot number.

NOTE: The unusual slot numbering convention of the CC121 is documented in the CC121 CompactPCI Crate User

Manual. The CC10X crates have a simpler slot numbering convention that the Acqiris driver already takes into

account. CompactPCI Crates from other manufacturers represent an unknown element.

NOTE: The GeoMapper is of use for some AS bus 2 systems in CC121 crates and, perhaps, crates from other

manufacturers. CC121 crate configurations with both an Acqiris acquisition module in one of the last 7 slots and

with the PC running under Windows 2000, NT, or XP will not need the GeoMapper. Users who do not need

GeoMapper do not need to read this chapter any further.

5.2. When should the GeoMapper Application be used

The application needs to be used whenever the bus or slot configuration of the system changes in a fundamental way.

The most obvious trouble symptom is that an expected multi-Instrument was not found. Alternatively the driver can

issue error messages that the AcqirisLive application and other programs will see. Among them are

Modules are not contiguous in AS bus 2 combination ACQIRIS_ERROR_MODULES_NOT_CONTIGUOUS

AS bus 2 Candidate Modules not on same bus ACQIRIS_ERROR_MODULES_NOT_ON_SAME_BUS

'AcqGeo.map' file is invalid or corrupted ACQIRIS_ERROR_INVALID_GEOMAP_FILE

In all of these cases the GeoMapper application should be run to ensure that the map file is up to date.

If desired the GeoMapper application will generate a default configuration in which it allows the driver to make all of

the choices. This is done by specifying "None (Disable GeoMap)" as the desired configuration in "Step1: Crate

count" of the application.

5.3. How to run GeoMapper

After software installation you will find GeoMapper in the AcqirisApp directory of the installation directory. After

being started the program will learn about the Acqiris devices present and then show a screen like the one below:

The choice of the number of crates ranges from None up to the number of bus segments that the driver has found

containing Acqiris modules. If you choose None and save the resulting AqGeo.map file the system will behave in its

natural way without any additional user provided information. If you want to give the driver information on the

physical position of modules you should select the appropriate number of crates. If the number of crates does not

correspond to your expectations you may have hardware problems (unpowered, broken, or badly cabled crates or

modules).

The next step is to associate each bus segment with a physical crate. The menu to do this is shown below:

User Manual: Agilent Acqiris 10-bit Digitizers Page 39 of 43

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Agilent Technologies DC122 Manuel d'utilisateur Page 39