GENERAL INFORMATION

The S110/N Decade Scaler Module (Figure 1) is a direct-coupled 200 MHz decade scaler. The S110/N has a direct-coupled discriminator input and both a visual and an electrical readout. The S110/N can be reset either manually or remotely. The input circuit is protected by a limiter and also provides both good termination and fast recovery. The carry output is a NIM-standard fast logic signal of nominal 20 nSec width. The width may be modified to meet special requirements.

The output signals are coded in 1248 BCD but the coding may be changed to the 122'4 code. Also, provisions are made for diode isolation of the data outputs, to allow wired-OR bussing of the digital output signals.

The S110/N is packaged in a single-width NIM-standard module. The front panel is painted blue.

Calibration is not required for the S110/N.

SPECIFICATIONS

INPUT	Impedance	50 Ohm
	Reflections	< 10% peak from -10V, 1 nSec step input
	Breakdown	+/-5V dc; +/-10V, 100 nSec pulses of duty factor < 10%; +/-100V transients
	Offset	<  +/-50mV
THRESHOLD	Range	Typ. -400mV
	Temp. Coeff.	Typically 2mV/'C
SPEED	CW	> 200 Mhz (measured with NIM-standard* fast logic signals)
	Pulse Pair Resolution	< 4 nSec (measured with NIM-standard* fast logic signals)
CARRY OUTPUT	Width	Typ. 20 nSec FWHM (NIM-standard* fast logic signals into 50 Ohm termination). Width may be increased by changing internal capacitance value
	Duty Factor	Max. 50%
RESET INPUT	ZERO Level	0 +/- 1.5V
	ONE Level	+3V to +20V or -4V to -20V
	Minimum Level	+/- 5V, 100 nSec with FWHM
	Input Impedance	2K Ohm
	Internal Reset Timer	Min. duration 2 uSec
READ INPUT	ZERO Level	0 +/- 1.5V (NIM-standard slow logic signals)
	ONE Level	+/-3V to +20V (NIM-standard slow logic signals)
	Minimum Input	+3V, 0.25 uSec FWHM
DIGITAL OUTPUTS	ZERO Level	0V to =300mV (NIM-standard slow logic signals)
	ONE Level	+24V from source impedance of 3.6k ohms (6.6 mA short circuit current)
	Codes	Standard BCD (1248) may be changed to 122'4
DIGITAL I/O CONNECTOR		Amphenol 57-40140 (Requires an Amphenol 57-30140 cable plug)
POWER REQUIREMENTS		+24V, 155mA  +12V, 64mA  -12V, 70mA  -24V, 162mA
PANEL COLOR		Blue

* NIM-standard fast logic signal ZERO = 0 +/- 50mV; ONE = -800mV +/- 100mV.
T₀₁ denotes ZERO to ONE transistion; T₁₀ denotes ONE to ZERO trasistion.