Introduction
1 Introduction
The Model MCCD is a fast pulse distributor intended to be used with multiple MCS8A modules. It is also a
very good general-purpose pulse generator when multiple synchronized jitter-free signals are required. It
expands one common START signal to several synchronous starting MCS8A units. The introduced additional
time jitter is typical less than 0.075 ps rms. Output rise / fall time is 60 ps. The minimum pulse width is 90 ps.
It can operate up to 6 GHz periodic signal frequency.
In addition there is a synchronous clock source at the rear panel. It can supply up to 8 MCS8A units with a
common clock for synchronous operation of multiple MCS8A, providing up to 64 synchronized channels. It
has a clock input (TTL 3.3V, 10 to 120 MHz) to be distributed to the connected MCS8As. Termination can be
50 Ohm or 3 kOhm. AC or DC coupling is selectable.
If no input signal is connected, by setting the jumper JP1 the internal 10 MHz clock source is fed to the
output connectors. The internal quartz oscillator can be replaced by an oven-stabilized oscillator (option
MCCDOVX) or a highly stable Cs atomic clock (option MCCDATOM).
Also there is an optional binary divider (32 bit), which can reduce the external clock in binary steps. Divider
factor is set by internal jumpers.
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