462 - Ortec
Contents
1. 2 32 INPUTS ye ee pe ee LA AS 2 4 OUTPUTS aeea Deon a ean Aa a a 2 5 ELECTRICAL AND MECHANICAL tees 3 INSTALLATIONS xc dinen dice ete ee ek dk Bee ead eae ae wt 8 1 GENERAL 0 02058 Saeed havea ye Helen eit eget de ena edt ch een yen eet eigen esis 3 2 CONNECTION TO POWER 0 0 3 3 OPERATION secesii ane Scar ok ieee nica Er D A E Ye erate AT eae Aan Meee RCI E ERS 4 1 wart eae waGaues E EA E peta ea a iit 4 2 RANGE SELECTION ier cain ree ene Seve meetin eget deve naw fete dian dears 4 9 RATE ADJUSTMENT ye Said oe dt he Ee a Le a 4 4 ON LINE OPERATION c g gone mi aA a gan weber hie RaW le had rege 4 5 USE OF DISPERSION AMPLIFIER 0 000 4 6 BIASED OPERATION ariei oa Deine Rai see WATE Pie se S 5 MAINTENANCE tte eh a eae Pe io de ae i eh ea a las Bis GENERAL wea x Ge RY aoe ae ees a 5 2 FAC TORY REPAIR weiss Sas tee ve Seed ie Te tee Se AOE ca aes e2. Frequently it will be advantageous to accumulate the normal spectrum without dispersion and to add the time markers with dispersion during separate and sequential analysis and without erasure of the data between the runs 4 6 BIASED OPERATION When the 462 output is furnished through a Biased time to pulse height converter such as the ORTEC 457 the lower portion of the spectrum can be biased off and the remainder be amplified for a more critical examination of some portion of interest in the overall spectrum Figure 4 1 shows the result of operating with a biased amplifier in which the first time marker has been eliminated from the spectrum and two subsequent markers have been included The conditions set for the biased spectrum of Fig 4 1 were a 10 ns period setting on the 462 and a 50 ns range on the ORTEC 457 Biased Time to Pulse Height Converter The 462 range was set at 80 ns The conversion gain of analyzer was set for 1024 channels 50 ns basically and then the 457 bias was increased for an offset of 384 channels Using a 256 channel display the post gain of the 457 was increased to position the two markers as shown in Fig 4 1 Under these conditions it can be calculated that the time markers represent 30 ns and 40 ns respectively The spectrum of Fig 4 2 was obtained by adding dispersion to the system of Fig 4 1 With the aid of a readout the peak centroids were calculated at channel 32 55 for 30 ns and at channel 2
3. 1 4 11 8 oe 23 Q3E 2 1 15 1 4 CoE 13 asc 01 5 TTL 1C1 6 0 switch set at Min 0218 1 3 16157 11 8 462 0400 Printed Circuit O8B 1 3 1C1 8 9 Q8C 01 1C2 1 23 Q1C 8 9 Q9E 8 to 1 8 1C2 2 0 Q1B 5 6 Q20B 1 3 2 3 13 1 14 9 Q10B 1 3 02 4 0 2 8 4 Q23E 1 3 1C2 5 0 7 Q2B 9 Q11B 4 1 2 6 0 7 Q2E 5 2 Q11E 3 5 1C2 7 0 Q3C 11 9 Q11C 14 1C2 8 0 8 038 6 5 Q18C 4 5 1C2 9 23 O3E 9 Q18E 14 5 1C2 10 Adjustable to 0 ICQ 4 7 11 1 3 2 11 13 Q14B 1 3 1C2 12 0 Bin Module Connector Pin Assignments For Standard Nuclear Instrument Modules per DOE ER 0457T 5 Function 3 V 3 V Spare bus Reserved bus Coaxial Coaxial Coaxial 200 V dc Spare 10 6V 11 6V 12 Reserved bus 13 Spare 14 Spare 15 Reserved 16 7 12V 18 Spare bus 19 Reserved bus 20 Spare 21 Spare 22 Reserved OONDAARWNDN Pin 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 Function Reserved Reserved Reserved Spare Spare 24 V 24 V Spare bus Spare Spare 117 V ac hot Power return ground Reset Scaler Gate Reset Auxiliary Coaxial Coaxial Coaxial 117 V ac neutral High quality ground Ground guide pin Pins marked are installed and wired in ORTEC s 4001A and 4001C Modular System Bins
4. Remove remaining dirt with a lint free cloth dampened in a general purpose detergent and water solution Do not use abrasive cleaners CAUTION To prevent moisture inside of the instrument during external cleaning use only enough liquid to dampen the cloth or applicator e Allow the instrument to dry completely before reconnecting it to the power source vi 462 TIME CALIBRATOR EXTERNAL ENABLE NPUT PERIOD usec 0 32 F 0 16 1 0 64 0 084 1 28 qt 0 04 2 56 E T TS 0 02 7 gt 5 12 A 1 0 01 10 24 RANGE usec 1 28 256 612 PERIOD BUSY 0 08 81 92 SET RANGE gt gt PERIOD RATE OUTPUT OUTPUT DISPERSION AMPLIFIER INPUT OUTPUT DISPERSION gt ORTEC 462 TIME CALIBRATOR 1 DESCRIPTION 1 1 PURPOSE The ORTEC Model 462 Time Calibrator generates logic signals at precise time intervals that can be used to test and calibrate a time to pulse height converter such as the ORTEC Model 437A 447 or 457 The time base is a precision 100 MHz crystal controlled oscillator that is calibrated against WWV the National Bureau of Standards frequency and is temperature compensated for accuracy throughout the normal operating range of 0 to 50 C The time intervals their range and their repetition rate are all selectable in the Model 462 Each output from the 462 consists of a pair of start and stop pulses for the time to pulse height converter Each pair of pulses is exactly N int
5. in the spectrum as shown in Fig 1 2 and the peak centroid location can be calculated more accurately within a fraction of one analyzer channel The semi Gaussian noise is obtained from the random generator in the 462 and an amplitude control for the noise spreading is included on a printed circuit inside the module 2 SPECIFICATIONS 2 1 PERFORMANCE Calibration Period Accuracy Absolute accuracy 10 ps for 10 ns period and 0 005 of total period for all other selections factory calibrated against National Bureau of Standards WWV Calibration Period Stability Within lt 10 ppm C of selected period 100 ppm year 2 2 CONTROLS PERIOD ps 11 position switch selects the basic interval steps between start and stop outputs selections are 10 20 40 80 160 320 and 640 ns and 1 28 2 56 5 12 and 10 24 us RANGE us 11 position switch selects the total calibration time scale in binary multiples of 80 ns selections are 80 160 320 and 640 ns and 1 28 2 56 5 12 10 24 40 96 and 81 92 us RATE Single turn front panel trim potentiometer adjusts the random start stop rate from about 100 to 10 000 counts sec ON OFF Toggle switch disables the 462 output for the off position or enables the output except when gated off for the on position the adjacent lamp lights when the output is enabled DISPERSION Toggle switch marked MIN and MAX selects the internal circuit effect between the input and output of the dispe
6. 15 44 for 40 ns and the calibrated distribution for this spectrum was 182 89 channels 10 ns or about 54 7 ps 1 channel Fig 4 1 Typical Biased Timing Spectrum with Time Markers Spaced for 10 ns Fig 4 2 The Spectrum of Fig 4 1 with Dispersion 5 MAINTENANCE 5 1 GENERAL The following paragraphs are intended as an aid in the installation and checkout of the 462 Time Calibrator These instructions should provide ample information to ensure that the instrument is operating satisfactorily and to isolate any trouble that may occur Test Equipment The following or equivalent test equipment is needed e Fast Oscilloscope such as Tektronix 454 581 or 585 Voltmeter e Scaler with accurate time base such as ORTEC 715 Preliminary Procedures Visually check the module for possible damage due to shipment or handling and then perform the following steps 1 Connect ac power to a nuclear standard bin and Power Supply such as the ORTEC 4001 4002 Series 2 Plug the module into the bin and check for proper mechanical alignment 3 Switch the ac power on and check the dc Power Supply voltages at the test points on the 4001 Power Supply control panel Frequency and Countdown Tests The following procedure should be used for frequency and countdown tests 1 Connect the oscilloscope to the PERIOD output BNC on the rear panel with 500 cable and with a 500 termination at the oscilloscope 2 Set the time base of th
7. PERATION 4 1 PERIOD SELECTION Determine the period interval that is desired and set it on the PERIOD switch on the front panel The intervals are in binary steps from 10 ns through 10 24 us The relation between the range selected with the time to pulse height converter and the period selected on the 462 will determine how many multiples of the basic period will be included in the total spectrum For example an ORTEC 457 TPHC could be set for a range of 40 us if the 462 Period were then set at 5 12 us there would be about 7 time markers available within the 457 range If the 462 PERIOD switch were set at 1 28 us there could be as many as 31 time markers in the spectrum 4 2 RANGE SELECTION The RANGE switch must always be set at an interval that is greater than the selection of the PERIOD switch on the 462 If time markers are to be distributed across an entire spectrum from the TPHC the RANGE switch of the 462 must also be set for an interval that is greater than the range of the TPHC In the above examples with the range set at 40 us the 462 RANGE switch must be set at either 40 96 or 81 92 us if time markers are to be distributed up through the maximum time in the spectrum 4 3 RATE ADJUSTMENT The potentiometer marked RATE on the front panel regulates the relative output rate of start and stop pulse pairs from the 462 into the time to pulse height converter The range for this control is from about 100 outp
8. Printed in U S A Model 462 Time Calibrator Operating and Service Manual ORTEC Part 733340 Manual Revision H 1007 Advanced Measurement Technology Inc a k a ORTEC a subsidiary of AMETEK Inc WARRANTY ORTEC warrants that the items will be delivered free from defects in material or workmanship ORTEC makes no other warranties express or implied and specifically NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ORTEC s exclusive liability is limited to repairing or replacing at ORTEC s option items found by ORTEC to be defective in workmanship or materials within one year from the date of delivery ORTEC s liability on any claim of any kind including negligence loss or damages arising out of connected with or from the performance or breach thereof or from the manufacture sale delivery resale repair or use of any item or services covered by this agreement or purchase order shall in no case exceed the price allocable to the item or service furnished or any part thereof that gives rise to the claim In the event ORTEC fails to manufacture or deliver items called for in this agreement or purchase order ORTEC s exclusive liability and buyer s exclusive remedy shall be release of the buyer from the obligation to pay the purchase price In no event shall ORTEC be liable for special or consequential damages Quality Control Before being approved for shipment each ORTEC instrument must pa
9. Using 256 Analyzer Channels A RANGE switch on the 462 permits selection of the maximum multiple N for a given application and must logically be set for an interval that is greater than the selection with the PERIOD switch The RANGE switch selections are also binary steps starting at 80 ns with a maximum setting of 81 92 us In Fig 1 1 the RANGE switch was set at 1 28 us and time intervals were produced that were greater than the 880 ns maximum peak shown in the spectrum However the range of the Model 457 Time to Pulse Height Converter was set for 800 ns full scale which accounts for the lack of any of the longer time intervals in the spectrum even though they were produced by the 462 A RATE adjustment is included on the front panel to control the average rate of the random generator and thus control the average output rate of the start and stop output pulse pairs The range of this control is from about 100 to 10 000 counts sec An ON OFF switch on the front panel when set at ON permits operation to be gated through an EXTERNAL ENABLE INPUT rear panel connector if desired or to be continuous without any gating An indicator on the front panel lights when the instrument is actually producing the start and stop output pulse pairs The 462 also includes a peak dispersion amplifier that can mix semi Gaussian noise with the analog output of the time to pulse height converter before it is furnished into the multichannel analyz
10. e oscilloscope at 50 ns cm and the vertical deflection for 200 mV cm Use dc coupling 3 Apply power to the 462 and switch it on The front panel lamp should light to show an operational condition 4 Set the PERIOD switch at 0 01 us for 10 ns pulse intervals Observe 5 pulses cm with an amplitude of 600 to 800 mV This is the basic oscillator output at 100 MHz 5 Change the PERIOD switch setting to each of its other positions and monitor the square wave output for each switch setting Each setting should provide a 1 cycle output that has a period matching the switch setting and the nominal amplitude should stay at about 800 mV 6 If ascaler is available monitor the frequency of the PERIOD output to verify the output rate Some typical trouble symptoms together with means of determining and correcting them follow 1 No output for any switch position oscillator probably inoperative Check for 1 3 V on pin 5 of 1 Check for 5 2 V 0 2 V on pins 2 3 4 9 11 and 12 of IC1 Change IC1 if the voltages are incorrect 2 No output on 0 32 us or any succeeding larger period setting ECL to TTL translator not operating properly Check Q2 and Q3 by observing a 0 to 5 V square wave on the collector of Q3 Check outputs that switch from about 0 to 5 V on pins 12 9 13 and 8 of IC4 through IC8 Check input to TTL to ECL translator Q4 Q5 and Q6 check at Q4B for signals at each PERIOD switch position from 0 32 u
11. egral time intervals apart where N is a multiple 2 or more of the selected period set on the 462 The period selection consists of 11 binary steps from 10 ns to 10 24 us For example if the period selected is 40 ns the intervals produced would include 80 ns 120 ns 160 ns 200 ns 240 ns etc Each timed interval is triggered by a random generator and the 462 circuit is arranged so that the probability that N any multiple greater than 2 is about equal and the probability for N 2 is about doubled The time spectrum that can be obtained from the time to pulse height converter then consists of a series of sharp peaks at the multiples of the selected period and the first peak will have about twice the count total as each of the other peaks in the spectrum to simplify its identification and ensure that the lower end of the spectrum has not been biased off in the electronics Figure 1 1 is a time spectrum that was obtained from a 462 output The 462 PERIOD switch was set at 80 ns 0 08 us for this spectrum The first peak in the spectrum for 160 ns has accumulated about twice as many counts as any of the other peaks and peaks have been obtained for 160 240 320 400 560 640 720 800 and 880 ns Note that each peak except the one for 800 ns has been accumulated into just one of the 256 analyzer channels that were used The 800 ns peak has been counted into two adjacent channels Fig 1 1 Typical Timing Calibration Spectrum
12. ents through a mating power connector when it is installed in a ORTEC 4001 4002 Series Bin and Power Supply As a safety precaution always turn off the power for the bin before inserting or removing any modules If all the modules installed in the bin are ORTEC 400 and or 700 Series instruments there will be no overload on any portion of the power supply However if any modules are included that are not of ORTEC design this protection may not be effective monitor the dc voltages at the test points on the control panel of the bin after all modules have been installed in the bin and power is turned on in order to determine that none of the four dc power levels has been reduced by an overload 3 3 CONNECTION INTO A SYSTEM The 462 furnishes both start and stop input pulses into a time to pulse height converter and provides accurately controlled timed intervals that can be used to check the response and calibration of the TPHC A typical system interconnection for calibration is shown in Fig 3 1 Connections are shown here for the use of both functions available in the 462 calibration signal generation and spectral dispersion By routing the output from the time to pulse height converter through the dispersion amplifier portion of the 462 the spectrum can be made either with or without dispersion When the toggle switch is set at MIN there is no dispersion of the TPHC output When the toggle switch is set at MAX the resolution o
13. er When this circuit is used it spreads each peak in the spectrum by about 10 channels FWHM per 1000 analyzer channels This feature can be used to help identify the peak centroid within a fraction of one channel Figure 1 2 illustrates the same information as Fig 1 1 with the TPHC output passing through the dispersion amplifier in the 462 and with its toggle switch set at MAX For a further comparison Fig 1 3 shows the same spectrum with dispersion obtained with a 1024 channel conversion rather than the 256 channel conversion of Figs 1 1 and 1 2 Fig 1 3 The Spectrum of Fig 1 1 with Dispersion Using 1024 Analyzer Channels 1 2 PHYSICAL DESCRIPTION The 462 Time Calibrator is a double width module that furnishes fast negative NIM logic pulses in the start and stop inputs of a time to pulse height converter The time intervals between the start and stop pulses are precise multiples of a selected basic period The PERIOD selector switch on the front panel selects binary multiples of 10 ns through 10 24 us A constant train of output pulses at the selected period rate is available through a rear panel connector marked PERIOD OUTPUT A RANGE switch on the front panel selects the maximum multiple of the period selection that will be effective Its settings also binary are from 80 ns through 81 92 us This switch must always be set for an interval that is greater than the period selection for logical operation The combinat
14. f the time spectrum will be purposely degraded in order to locate the peaks within a fraction of one channel This can aid in increasing the precision with which a spectrum is evaluated The 462 can be connected into an operating system for on line operation if desired When the ON OFF switch is set at OFF the 462 will not affect the accumulation of the spectrum other than the possible application of the dispersion amplifier At any time before during or after the accumulation of the normal spectrum the 462 switch can be set at Model 462 Time Calibrator MULTI CHANNEL ANALYZER Fig 3 1 Typical System Interconnections AMPLIFIER DETECTOR DETECTOR AMPLIFIER MODCL 4 amp 2 TIMC CALIBRATOR ON and it can then provide time markers in the normal spectrum Figure 3 2 shows the system interconnections for on line operation of the 462 A BNC tee connector is attached to the START and STOP OUTPUT connectors of the 462 to accommodate the input from a detector amplifier circuit and the outputto the discriminator and TPHC The TPHC output can be routed directly into the multichannel ADC or can be returned to the dispersion amplifier in the 462 before it is furnished into the ADC Simple manual or automatic enable will furnish calibrations peaks OSCRIME NATOR TIMCTO PULSC HCKSHT CONVCRTCR OCRIME NATOR Fig 3 2 Typical System Interconnections for On Line Operation 4 O
15. he switch is set at ON and no control is furnished through the EXTERNAL ENABLE INPUT connector on the rear panel the indicator lamp lights and the instrument is operating Optional external control can then be imposed through the rear panel connector to inhibit operation by grounding the connector circuit and to enable operation by furnishing an open circuit or a level 22 0 V through this connector The START and STOP output connectors furnish standard fast negative NIM logic signals through a 1 output impedance for interconnection to the START and STOP inputs respectively on 8 time to pulse height converter Use 50Q cable and termination for each of these signals All ORTEC time to pulse height converters in 50Q input impedance circuits and additional termination is therefore not required The dispersion amplifier provides a separate function The output from the time to pulse height converter is normally routed directly into the ADC of a multichannel analyzer This would provide a time calibration spectrum like that shown in Fig 1 1 With the 462 the output from the TPHC can be furnished through the dispersion amplifier and then to the ADC When the DISPERSION AMPLIFIER toggle switch is set at MIN the signals are passed through without any changes When the toggle switch is set at MAX a near Gaussian noise signal is mixed with the TPHC output signals before they enter the ADC This feature reduces the resolution of each peak
16. input 3 Set the toggle switch at MAX and observe the addition of noise to the signal seen at the output Some typical trouble symptoms and their corrections follow 1 No output occurs IC2 not operating properly Check for the correct voltages at all pins on 2 2 Noise is not integrated with signal not operating properly Check for the correct voltages at all pins on IC1 Power Supply lf the 5 V supply fails disconnect the 5 and 5 V wires from the 462 0200 printed circuit board to protect the integrated circuits and connect a 1 1 2 W resistor across the output from each supply level to ground Check for the proper voltage at each transistor pin Check for only a slight 120 Hz ripple at the collectors of both Q1 and Q2 Restore the circuit connections after correcting any fault Table 5 1 is a list of typical voltage levels that should exist in an operational 462 Measurement of these voltages can often aid in the isolation and identification of any trouble that may be encountered in the circuits of the unit 5 2 FACTORY REPAIR See the Warranty statement on page ii of this manual Table 5 1 Normal dc Voltages oe ic 462 0200 Printed Circuit 0228 1 3 1C2 13 13 Q16B 1 3 1C2 14 0 IC1 2 3 4 9 11 12 2 Q1B 13 7 1 5 1 3 462 0300 Printed Circuit Qic 23 IC2 8 5 2 1C1 1 9 Q1E 13 IC3 8 5 2 1C1 3 0 switch set at Min 028 137 Q3B 1 3
17. ions of settings of the PERIOD and RANGE switches determine the number of time intervals that will be furnished into the time to pulse height converter For example if the PERIOD switch is set at 0 16 us and the RANGE switch is set at 1 28 the time intervals that will be furnished will be randomly distributed between 320 480 640 800 960 and 1120 ns Potentially a start and stop pulse pair can be generated during each range interval However a random generator must provide an internal period pulse coincidence within the range interval if an output pulse pair is to be generated in that range interval The RATE control on the front panel adjusts the average rate of the random generator and the statistical chance for coincidence between each random generator output and a period pulse will determine the actual output count rate Coincidences are more probable at higher random generator rates and at shorter period selections and these must be adjusted together to provide satisfactory operation A BUSY OUTPUT connector is included on the rear panel The signal through this connector goes negative at each Start Output signal and returns to ground at the subsequent Stop Output The function can be monitored with an oscilloscope or the total number of output pulse pairs can be counted in an external scaler to determine the average rate The ON OFF toggle switch on the front panel provides manual gating for operation of the 462 When t
18. p this should provide square waves from about 0 to 4 V Test translator output at Q6E this should provide square waves from about 0 8 to 1 8 V the ECL logic levels Test switch 918 by observing all period selections on the wiper of S1B or at the base of Q1 ECL logic levels should be present Measure 1 3 V 0 2 V at the base of Q21 the period output driver 3 Period output present but no Start or Stop outputs or Busy outputs check the random noise generator Connect the oscilloscope probe at pin 15 of IC9 set the RATE control to maximum clockwise and check to see that the switch is on the EXTERNAL ENABLE INPUT BNC is open and the front panel light is on Observe pulses as RP and without correlation to triggers Connect oscilloscope probe to Q18C and observe approximately 2 V peak to peak noise at a dc level of about 5 V Check dc levels for Q11 and Q18 Check start stop derandomizing coincidence and observe each pulse at the indicated circuit point Dispersion Amplifier The dispersion amplifier is a completely separate and isolated circuit and may be checked with a pulse generator or other signal source with the toggle switch for the Start Stop section of the instrument set at Off 1 Connect a 0 to 10 V positive or negative signal source to the DISPERSION AMPLIFIER INPUT and set the toggle switch at MIN 2 Observe the signal at the DISPERSION AMPLIFIER OUTPUT this should be the same signal as is furnished to the
19. rsion amplifier The MIN position selects a reproduction of the Input with a gain of 1 at the output The MAX position provides for the addition of semi Gaussian noise to the Input before it is furnished through the output the purpose is to reduce the resolution of the spectrum in order to calculate the peak centroid within a fraction of one channel 2 3 INPUTS EXTERNAL ENABLE INPUT Rear panel BNC connector accepts gating logic to control unit when ON OFF switch is set at on gt 2 0 V or open enables or nominal ground disables DISPERSION AMPLIFIER INPUT _ Front panel BNC connector accepts 10 V linear signals typically from a time to pulse height converter Zin 2 2 4 OUTPUTS Start Output Front panel BNC connector furnishes a NiM standard fast negative logic pulse which occurs at random during each range burst as the result of a double internal coincidence Z 1 kQ Stop Output Front panel BNC connector furnishes a NIM standard fast negative logic pulse which occurs at an integral multiple gt 2 of the selected period following each Start output pulse Z 1 KQ Busy Output Rear panel BNC connector furnishes a signal that is 0 8 V for a 50 load during the interval from each start pulse until its subsequent stop pulse Z 1 Period Output Rear panel BNC connector furnishes a NIM standard fast negative pulse at a fixed rate of 1 period can be used to check calibration or as a stable external time ba
20. s de tee SAFETY INSTRUCTIONS AND SYMBOLS This manual contains up to three levels of safety instructions that must be observed in order to avoid personal injury and or damage to equipment or other property These are DANGER Indicates a hazard that could result in death or serious bodily harm if the safety instruction is not observed WARNING Indicates a hazard that could result in bodily harm if the safety instruction is not observed CAUTION Indicates a hazard that could result in property damage if the safety instruction is not observed Please read all safety instructions carefully and make sure you understand them fully before attempting to use this product In addition the following symbol may appear on the product ATTENTION Refer to Manual DANGER High Voltage Please read all safety instructions carefully and make sure you understand them fully before attempting to use this product SAFETY WARNINGS AND CLEANING INSTRUCTIONS DANGER Opening the cover of this instrument is likely to expose dangerous voltages Disconnect the instrument from all voltage sources while it is being opened WARNING Using this instrument in a manner not specified by the manufacturer may impair the protection provided by the instrument Cleaning Instructions To clean the instrument exterior e Unplug the instrument from the ac power supply Remove loose dust on the outside of the instrument with a lint free cloth e
21. se Z 1 Dispersion Amplifier Output Front panel BNC connector provides 10 V linear output same polarity as the DISPERSION AMPLIFIER INPUT DISPERSION switch selects whether signal is an exact reproduction of the input or has 100 mV FWHM random noise mixed with it Z lt 10 2 5 ELECTRICAL AND MECHANICAL Power Required 12 V 110 mA 12 V 340 mA 24 V 40 mA 24 V 110 mA Weight Shipping 2 9 kg 6 5 Ib Weight Net 1 6 kg 3 5 Ib Dimensions Double width NIM standard module 2 70 by 8 714 in per TID 20893 Rev 3 INSTALLATION 3 1 GENERAL The ORTEC 4001 4002 Series bins and power supplies are designed to accommodate NIM modules such as the 462 Time Calibrator and to furnish the required operating power to the module Any of these bins except the 401M Minibin is intended for rack mounting It is important that any vacuum tube equipment that is operating in the same rack have sufficient cool air circulating to prevent localized heating of the all transistor circuits in the 462 and in other modules installed in the bin and power supply Rack mounted equipment subjected to the temperatures in vacuum tube equipment can exceed the maximum for which the transistorized circuits are designed unless this precaution is taken The 462 should not be subjected to temperatures in excess of 120 F 50 C 3 2 CONNECTION TO POWER The 462 is designed per TID 20893 Rev and accepts its operating power requirem
22. ss a stringent set of quality control tests designed to expose any flaws in materials or workmanship Permanent records of these tests are maintained for use in warranty repair and as a source of statistical information for design improvements Repair Service If it becomes necessary to return this instrument for repair it is essential that Customer Services be contacted in advance of its return so that a Return Authorization Number can be assigned to the unit Also ORTEC must be informed either in writing by telephone 865 482 441 1 or by facsimile transmission 865 483 2133 of the nature of the fault of the instrument being returned and of the model serial and revision Rev on rear panel numbers Failure to do so may cause unnecessary delays in getting the unit repaired The ORTEC standard procedure requires that instruments returned for repair pass the same quality control tests that are used for new production instruments Instruments that are returned should be packed so that they will withstand normal transit handling and must be shipped PREPAID via Air Parcel Post or United Parcel Service to the designated ORTEC repair center The address label and the package should include the Return Authorization Number assigned Instruments being returned that are damaged in transit due to inadequate packing will be repaired at the sender s expense and it will be the sender s responsibility to make claim with the shipper Instruments not in warrant
23. ut pulse pairs per second through about 10 000 pairs per second If the 462 is being used exclusively for TPHC calibration the rate can usually be advanced to a high level since only these signals will be processed by the TPHC and the multichannel analyzer When the 462 is being used on line to add markers into a time spectrum adjust the RATE control down to a point where the marker count rate is compatible with the count rate of the basic time spectrum This can be adjusted by visual inspection of a live display in the analyzer during operation 4 4 ON LINE OPERATION With the system connect as shown in Fig 3 2 the basic time spectrum can be accumulated while the 462 is either turned on or off When the 462 is turned on the markers will be added into the spectrum When the 462 is turned off the normal spectrum will be accumulated without any time markers from the 462 4 5 USE OF DISPERSION AMPLIFIER Most time spectra will have an inherent resolution that does not require the use of the dispersion amplifier in the 462 for a proper calculation of the peak centroid location However the dispersion amplifier Input and Output can be used to route the time to pulse height converter output through this function if desired When the signals do pass through the dispersion amplifier portion of the 462 the front panel toggle switch can be set at Min to eliminate any dispersion or can be set at Max to introduce the intended peak spreading
24. y should follow the same procedure and ORTEC will provide a quotation Damage in Transit Shipments should be examined immediately upon receipt for evidence of external or concealed damage The carrier making delivery should be notified immediately of any such damage since the carrier is normally liable for damage in shipment Packing materials waybills and other such documentation should be preserved in order to establish claims After such notification to the carrier please notify ORTEC of the circumstances so that assistance can be provided in making damage claims and in providing replacement equipment if necessary Copyright 2007 Advanced Measurement Technology Inc All rights reserved ORTEC is a registered trademark of Advanced Measurement Technology Inc All other trademarks used herein are the property of their respective owners CONTENTS WARRANTY SAFETY INSTRUCTIONS AND SYMBOLS SAFETY WARNINGS AND CLEANING INSTRUCTIONS ae 1 1 PURPOSES ie hae 1 2 PHYSICAL DESCRIPTION 2 Sa eee Pa tele ea bade Pale Cele Pang haat San vena bees 21 PERFORMANCE a hewn iad oe eae pee eae 2 2 CONTROLS
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