Bus Analysers in the CERN Electronics Pool
by Markus Joos, 10 June 2008
The CERN Electronics Pool offers a number of bus analysers for (short term) rent. The
following is a list of items available:
This (rather old) analyser is still adequate for D8/16/32 single cycles and block transfers.
Its user interface is not as intuitive as that of the more modern VBT325. In addition, the
VBT321 has to be connected to a VT100 terminal (e.g. Falco) or emulator (e.g.
The VBT325 fully supports the VME64 protocol. It can either record the VMEbus activity
in decoded form (one text line per cycle) or as a waveform with a maximum sampling
frequency of 50 MHz, which makes it useful for the detection of protocol violations of
(newly designed) VMEbus modules. It has to be connected to a VT100 terminal (e.g.
Falco) or emulator (e.g. minicom, hyperterm). It is also possible to connect a printer to it.
CES VMDIS 8004
The VMDIS 8004 in actually not an analyser but a simple display module. As it does not
require any external periphery it is very simple to use but still powerful enough to help
debug certain problem (e.g. sporadic bus errors).
In addition to these modules a VMEtro Vanugard is available in PH/ESE group. This
state-of-the-art VMEbus analyser (which cannot be rented in the usual way) also
supports the 2eVME and 2eSST protocols. If you need this device for an analysis please
contact Markus Joos.
VMEtro PBTM 315
This device is a PCI analyser in PMC format typically used on VMEbus or CompactPCI
Single Board Computers. It supports 64 bit transfers at up to 33 MHz and can be
installed between the host card and a PMC module. It can be connected to a VT100
terminal (e.g. Falco) or emulator (e.g. minicom) or to the serial port of a Windows PC
with the BusView software of VMEtro.
This device is a PCI analyser in PCI card format with support for both 3.3V and 5V
signaling environments. It supports 64 bit transfers at up to 66 MHz. In addition it
contains a bus exerciser which can be used to generate PCI cycles in various modes.
The PBT515 can be connected to a VT100 terminal (e.g. Falco) or emulator (e.g.
minicom) or to the serial or USB ports of a Windows PC with the BusView software of
This model is based on the PBT515 but has additional support for PCI-X up to 100 MHz.
USB and CAN
Protocol analysers for USB and CAN are available in the PH/ESE group. These modules
cannot be rented in the usual way from the Pool. If you need such a device for an
analysis please contact Markus Joos.