SPECIFICATIONS
CAPACITY Eight (8) digits BCD plus overflow.
SIGNAL INPUT(each channel)
Pulse Repetition Rate: 0 to 100mpps min(125mpps typical)
Pulse Pair Resolution: 10 ns min.
Minimum Pulse Width: 3nsec FWHM
Discriminator Level: -500mv (internally adjustable to a
min. -300mv)
Input Impedance: 50Ohm 10% D.C. coupled
Input Reflections: Less than 10% for lns rise time of
NIM level signals.
GATE (each channel)
Manual: Front panel three position switch
(OPEN,REMOTE,CLOSED) for controlling
the counting gate. In the remote
position electrical gate signals
control the counting gate.
Electrical: Two bridged LEMO connectors on front
panel. Bridged inputs allow daisy
chaining of gate signals from scaler
to scaler.
Input Impedance: 5K min.
Sensitivity: -500mv
Input Protection: t 50 volts transients
Response Time: Less than 10nsec.
RESET (each channel)
Manual: Front panel push button for reset of
counter overflow and display.
Electrical: Two bridged LEMO connectors on front
panel. Bridged inputs allow daisy
chaining of gate signals from scaler
to scaler. The input is biased to a
CAMAC logic zero (approx. 3.5v) and
a ground or a current sink of 10ma
will reset scaler channels to zero.
DISPLAYS (each channel)
Counter: Eight (8) inline 3/8" high character
LED seven(7) segment digits.
Gate: LED light on when counter gate is
open.
Overflow: LED light on when counter overflows.
Turns off when counter is reset.
OUTPUTS (each channel)
Carry Output: LEMO front panel connector provides
a fast NIM pulse -800mv into 50 ohms
each time counter overflows. A
carry pulse will not be generated
at reset.
POWER REQUIREMENTS: Less than 12 watts
+ and - 6 volts
TEMPERATURE RANGE 0 to 60'C
SIZE Double width 8 3/4 high NIM module.
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