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Technical

Information

Manual

5 November 2003

Revision n. 0

MOD. N1145

QUAD SCALER

AND PRESET

COUNTER/TIMER

NPO:

00115/01:N1145.MUTx/00

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Summary of Contents for N1145

Page 1: ...Technical Information Manual 5 November 2003 Revision n 0 MOD N1145 QUAD SCALER AND PRESET COUNTER TIMER NPO 00115 01 N1145 MUTx 00...

Page 2: ...he User accident or any abnormal conditions or operations CAEN declines all responsibility for damages or injuries caused by an improper use of the Modules due to negligence on behalf of the User It i...

Page 3: ...AGING 6 2 1 POWER REQUIREMENTS 6 2 2 FRONT PANEL I O CONNECTIONS 6 2 3 FRONT PANEL SWITCHES 7 2 4 TECHNICAL SPECIFICATION TABLE 8 3 PRINCIPLES OF OPERATION 9 3 1 SECTIONS 1 TO 4 9 3 2 SECTION 5 9 4 OP...

Page 4: ...imer The counters can perform different operations and can be variously interconnected thereby making the module a flexible and powerful tool for several applications involving time frequency and rati...

Page 5: ...SINGLE REPEAT SWITCH RESET PUSHBUTTONS LOAD PUSHBUTTON CH1 CH 2 RESET IN IN IN IN IN OUT END MARKER COUNTER TIMER 1 us 1 ms LOAD M o d N 1145 CH 1 GATE NORMAL GATE GT CLR CH 2 NORMAL GATE GT CLR GATE...

Page 6: ...d Free port must be terminated on 50 SECTIONS 2 AND 4 INPUTS 1 accepts both NIM and TTL signals 50 impedance GATE one NIM TTL input 50 impedance CARRY one NIM output Generates a pulse when counter has...

Page 7: ...HES Section 1 4 Function they allow to select the operating mode see 3 1 RESET PUSHBUTTONS Section 1 4 Function they allow to clear the relevant section see 3 1 SOURCE SELECTION SWITCH Section 5 Funct...

Page 8: ...and 3 2 bridged high impedance NIM TTL inputs Section 2 and 4 50 impedance NIM TTL input Control inputs Load 1 NIM TTL input loads counter with value set on thumb wheel switches min FWHM 3 ns Carry Se...

Page 9: ...NIM TTL input must be terminated with a 50 impedance at the other port Sections 2 and 4 have one 50 GATE NIM TTL input and one CARRY NIM output The CARRY output generates a NIM pulse when the counter...

Page 10: ...rt the counter a new load operation is required Actually when using the LOAD button the counter can be restarted even BEFORE zero is reached The LOAD NIM TTL signal is disabled during counting After a...

Page 11: ...al MUT N1145 Quad Scaler and Preset Counter Timer 05 11 2003 0 NPO Filename Number of pages Page 00115 01 N1145 MUTx 00 N1145_REV0 doc 14 11 Fig 3 1 Section 5 Timing Diagram 1 0 2 0 Trimmer adjustable...

Page 12: ...ee sections for instance 1 with 3 and then 3 with 2 or 4 via cables in order to send them a single external GATE input The OUT signal of section 5 can be used as the GATE input to the counters The dou...

Page 13: ...t the END MARKER output or transition at the OUT ports An absolute delay can be obtained with section 5 in TIMER Mode The duration of the delay is Td N actually the time interval between the LOAD sign...

Page 14: ...0 doc 14 14 The uncertainty of the measurement of an absolute time delay is therefore equal to the clock period For frequency measurements it is i max min Mc N Mc 1 N 1 N where i is the absolute frequ...

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