Spectrum M2p.59 Series, Hardware Manual, Page: 15 / 190

Introduction Additional options
(c) Spectrum Instrumentation GmbH 15
Additional options
Digital I/O with Dig-SMB
The Digital I/O options „Dig-SMB“ adds
sixteen additional Multi-Purpose I/O lines
to the card.
All sixteen lines are provided via SMB min -
iature coaxial connectors, just like the
analog channels or clock and trigger in -
put.
Ten of these lines are mounted on the PCI
bracket and are hence accessible from the
outside of the PC. The other six lines are
mounted on the top of the PCB and hence
are available on the inside of the PC.
These lines extend the already existing
Multi-Purpose I/O lines that come stand -
ard with the main card (X0 .. X3).
Because the capabilities of these addition -
al lines are nearly identical to those on the
main card, they are conveniently named
(X4 .. X19).
Digital I/O with Dig-FX2
The Digital I/O options „Dig-FX2“ adds
sixteen additional Multi-Purpose I/O lines
to the card.
All sixteen lines are provided via the multi-
pin FX2 connector, a type that is already
used on many different Spectrum products
in the past and pin-compatible to the exist -
ing options and cards using it. The pinning
for that connector and the included adapt -
er cable to standard IDC connectors is giv -
en in the appendix of this manual.
These lines extend the already existing
Multi-Purpose I/O lines that come stand -
ard with the main card (X0 .. X3).
Because the capabilities of these addition -
al lines are nearly identical to those on the
main card, they are conveniently named
(X4 .. X19).
Four of these lines (X12, X13, X18 and
X19) are additionally also available as co -
axial connectors on the PCI bracket. These lines can be selected by jumper individually for each line to be either made available on the FX2
connector or on one of the respective SMB connectors. This allows for easy monitoring of lines for debugging purposes or to connect external
equipment that requires 50 Ohm line impedance.
Image 6: M2p card with installed DigSMB digital option showing the 16 SMB connectors
Image 7: M2p card with installed DigFX2 digital option showing connectors and jumper locations for connection switching