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ContactThe 978 generates NIM and ECL pulses with widths ranging from 50 ns to 10 s when triggered. Output pulses are provided in normal and complementary formats. An end-of-pulse marker output signal is provided that can be used to retrigger the timer in repeating mode. Triggering START can be provided by an external signal or manually via a front panel switch. The veto input can be used as a disable gate for the enable input signal. Coarse adjustment of the output width can be performed with a 10-position rotary switch, while fine adjustment can be achieved with a knob. Two timers can be cascaded to form a pulse generator with variable width and frequency. Overall accuracy is 10% of full scale plus a temperature coefficient of 0.1% per °C.
978 dual timer
Product model:
Brief description:Two identical trigger pulse generators in a single-width NIM module Manual or pulse trigger start NIM and ECL output widths from 50ns to 10s End mark output Can be used as a variable width and frequency pulse generator when two sections are cascaded The ORTEC978 dual timer is a single-width NIM module with two identical flexible trigger pulse generators built in
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Detailed introduction
- Two identical trigger pulse generators in a single-width NIM module
- Manual or pulse trigger start
- NIM and ECL output widths from 50 ns to 10 s
- End mark output
- Can be used as a variable width and frequency pulse generator when the two sections are cascaded
The ORTEC 978 Dual Timer is a single-width NIM module that houses two identical flexible trigger pulse generators.
information +
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978 Brochure
- 978 Brochure (A4)
- 978 manual
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More information +
Specifications +
Output
Two normal independent outputs, one complementaryNIMlevel and aECL. The output width is50 nsto10 s, adopt9decimal steps with potentiometer and locking dial for fine adjustments.
dead time
shorter than the cycle time. (The timer can trigger before the end of the timing period).
rise/Fall time
<2 ns。
I/Odelay
The delay from startup to the leading edge of the output or from reset to the trailing edge is approximately13 ns。
input and outputstart input
LEMO 00The connector input accepts fast negativeNIMsignal, the minimum pulse width is5 ns。Zin= 50 Ω。ECLThe input terminal is a double pin,Zin =100Ω。
veto input
When starting the leading edge of ±2 nsThe internal logic isTRUE(True), accepts fast negativeNIMlogic and disables the start input.Zin= 50 Ω。LEMO 00connector.
Reset input
accept quick negativeNIMlogical, minimum width7 ns(Repeat the operation as15 ns). This input can be used at any time to generate an end marker.Zin= 50 Ω。LEMO 00connector.
end tag
OutputleftLEMO 00（Zout =50Ω) connector output provides15 nswideNIMlogic level, where the leading edge and the trailing edge of the output are within ±2 nsoverlap within. rightLEMO 00（Zout =50Ω) provides complementaryNIMlogic level.ECLOutput is dual pinECLlogic,Zout =100Ω。
reverse phaseOut
andOutOutputleftLEMO 00（Zout =50Ω) connector output provides fastNIMForward logic level. rightLEMO 00（Zout =50Ω) connector output provides fastNIMNegative logic level.ECLOutput is dual pinECLlogic,Zout =100Ω。
controlmomentary start switch
The switch creates an end marker and provides manual reset functionality.
width switch
50 nsNine-digit decimal switch to ∞. The ∞ setting provides bistable operation.
Width potentiometer
Each width switch setting of the overlap can be fine-tuned. Accuracy is ± of full scale10% (temperature coefficient is set0.1％/°C）。
indicatorLED
LEDflashing0.1seconds or output width (whichever is greater). At high rates, the blink rate is out of sync with the input.
electrical and mechanicalRequired power supply
+6 V, 55 mA; –6 V, 560 mA; +12 V, 17 mA; +24 V, 40 mA; –24 V, 18 mA。
weight
Net weight 0.9Kilogram (2pounds) Shipping weight 2.25Kilogram (5pounds)
Size
NIMStandard single width,3.43 x 22.13cm (1.35 x 8.714inches) front panel, conforming toDOE/ER-0457Trequirements.
Ordering information +
Model
Description
978
Dual timer
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