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GENERAL INSTALLATION
CABLES
INSTALLATION
The LeCroy Model 3377 TDC is intended for use within a standard
CAMAC crate, such as the LeCroy Model 8025 CAMAC Crate with
25 slot positions or the Model 8007A with 7 positions. The following
voltage sources must be properly connected to the backplane: +24 V,
+6 V, -6 V, and -24 V. Each crate must be controlled by either a slave or
intelligent controller. The controller must occupy the right-most slot in
the crate. Its purpose is to issue CAMAC commands to the modules
and transfer information between a computer (or other digital device)
and the CAMAC modules. LeCroy offers such crate controllers, includ-
ing the Model 8901A. The 8901A is a GPIB/CAMAC slave interface that
operates as a "Talker/Listener", allowing the crate to act as one GPIB
instrument.
With the power off, the 3377 is inserted into one of the slots of the
CAMAC crate. The edge connector on the module should mate with the
bus connector with modest pressure. The thumb screw located on the
lower edge of the card should be engaged and tightened. Note the slot
number of the module, as it will later be used for addressing.
The 3377 is designed to use twisted pair cables for the input, output and
control signals, single twisted pair cables for the control inputs and 34
wire ribbon cable for the inputs and ECLbus output. Care should be
taken to install high quality cables to minimize the effects of noise and
crosstalk. There are two types of 34 conductor multiwire cables avail-
able, one for short connections using flat ribbon cable and one for longer
connections using twist and flat cable.
Suitable cables are available from LeCroy.
STP-DC /02/L - single twisted pair cable for control signals.
STC-DC /34/L - flat multiwire cable for short interconnections.
LTC-DC /34-L or DC2 /34-L - twisted-pair multiwire cable for long
interconnection.
All signal inputs are differential ECL and have a balanced 120 ohm
termination.
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