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MODEL VS

 

NIM, DUAL CHANNEL, 300MHZ
VISUAL SCALER

 

FEATURES:

  • HIGH COUNTING SPEED
  • EASY READING LED DISPLAYS
  • INTERNAL TEST FEATURES
  • LOW POWER CONSUMPTION

 

 

The JOERGER ENTERPRISES, INC. MODEL VS is a high speed scaler packaged in a double width NIM module. It contains two identical eight digit counters. Visual readout is provided on two eight digit LED displays. Character height is .375 inches and leading zero suppression is incorporated thus providing a very readable display. A gate light and overflow light are provided for each channel. Testing features are provided to test the displays (display all 8's) and also to test the counters. The counters are tested by switching on an internal test oscillator which injects a test signal into each channel. When the test oscillator is switched off the two channels should track within ± 1 count verifying correct operation. This test input is inserted after the counting gate so that the module may be tested in the presence of external inputs simply by gating off the scaler. A three position gate switch is provided to "Enable", "Disable", or allow the channel to be remotely gated by an external gate signal. Reset is accomplished either manually or externally. A carry output signal is provided for each channel.

 

SPECIFICATIONS:

(Identical for each channel)

INPUTS:

SIGNAL
Impedance
Pulse Repetition Rate
Pulse Pair Resolution
Sensitivity
Pulse Width		 50 Ohms +10% D.C. coupled
300MHZ typical, 250MHZ minimum
Less than 4nsec
-500mv
2nsec minimum

GATE (bridged high impedance NIM input)
Impedance
Sensitivity
Response Time		 5K ohms minimum
-500mv to gate channel off
Less than 10ns

RESET (bridged TTL input, biased to logic "0", +2.5v minimum)
Amplitude Logic "1", .5v maximum

OUTPUTS:

Carry Out (note carry out is inhibited during reset)
Amplitude
Pulse Width		 -700mv minimum, into 50 ohms
250nsec typical

DISPLAYS:
Data
Gate
Overflow		 Displayed on eight .375 LED displays with leading zero suppression.
An LED is provided to indicate when the counting gate is open.
An LED is provided to indicate when that channel has overflowed.

MANUAL CONTROLS:
Gate A three position switch is provided to open (enable), close (disable), or allow gating from an external input (remote).
Reset A pushbutton is provided to reset each channel. This switch is also used to test the display. When the switch is depressed all eights will appear on the display.
Test A test switch is provided that injects test signals into each channel after the counting gate. Both channels should track during test within ± 1 count.
POWER REQUIREMENTS: +6V, 360ma reset condition
+6V, 625ma both displays all eights, test mode
-6v, 715ma
SIZE: #2 NIM Module
TEMPERATURE RANGE: 0° C TO 50° C

 

JOERGER ENTERPRISES, INC 166 Laurel Road, East Northport, NY 11731 USA

1-631-757-6200 (Fax 1-631-757-6201) www.joergerinc.com

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copyright  1999-2007,  Joerger Enterprises, Inc.