Microchip Technology 4310B, User Manual

Page 1: ...2021 Microchip Technology Inc Advance Information DS50003057A CSIII Model 4310B User s Guide...

Page 2: ...icrochip are committed to continuously improving the code protection features of our products Attempts to break Microchip s code protection feature may be a violation of the Digital Millennium Copyrig...

Page 3: ...specifications in product data sheet DS00003499 Appendix B Programmer s Guide This section describes the protocol for the RS 232 interface and includes general communication parameters and the com ma...

Page 4: ...haracters A dialog button Click OK A tab Click the Power tab N Rnnnn A number in verilog format where N is the total number of digits R is the radix and n is a digit 4 b0010 2 hF1 Text in angle bracke...

Page 5: ...chip Sales Department See www microsemi com sales contacts 0 for sales support contact information If you encounter any difficulties installing or using the product contact Microchip Frequency and Tim...

Page 6: ...software General Technical Support Frequently Asked Questions FAQs technical support requests online discussion groups Microchip consultant program member listing Business of Microchip Product selecto...

Page 7: ...ments and Information 5 The Microchip Website 6 Customer Support 6 Document Revision History 6 Chapter 1 Product Overview 9 1 1 Introduction 9 1 2 LED Indicators 9 1 3 Rear Panel Connections 9 1 4 Sof...

Page 8: ...AT Shipping Considerations 24 4 5 Shipping Products Back to the Factory 24 4 6 Shipping Carriers 25 4 7 Storage 25 4 8 Cesium Beam Tube Vacuum 25 4 9 Cesium Beam Tube Shelf Life 25 Chapter 5 Theory of...

Page 9: ...information see Appendix A Specifications 1 2 LED INDICATORS The following indicators are available on both the front and the rear panel Power Indicator Indicates power applied to instrument green LE...

Page 10: ...requency or phase of outputs or to monitor internal health parameters In some applications users may develop their own inter face software for control and monitoring of the CsIII For more information...

Page 11: ...The item number can be found on a label affixed to the rear panel Contact the Microchip distributor if the model or item numbers do not match 2 3 ENVIRONMENTAL CONSIDERATIONS When installing the inst...

Page 12: ...e apply AC power to the CsIII by installing the detachable power supply cord at the AC Input connection on the rear panel Apply DC power to DC input if available Observe that the power and alarm front...

Page 13: ...lication An uninstall icon is also added so that you can easily remove the program in the future For DB9 connector see the following table for connector pin out information 2 8 ESTABLISHING COMMUNICAT...

Page 14: ...reen information every ten seconds The status bar in the lower left of the main window that reports count down to the next update and communication activity as it occurs indicates RS 232 sta tus In th...

Page 15: ...l serial number and PC communication port The status bar at the bottom of the main window indicates RS 232 communication activity on the left and instrument status Warming Up Operating Minor Fault or...

Page 16: ...in Note that the data is not saved if the specified directory does not exist The name for the data file may be entered into the Data Filename Template field The macro field ld is replaced with the ser...

Page 17: ...ield C Field Current 19 17 21 mV 21 VuWave Microwave Power Control 1809 0 5000 mV 22 DCLevel DC Signal Level 2971 0 5000 mV 23 DACGain Digital Preamplifier Gain 2 61 0 255 mV 24 NumGain Numerical Gain...

Page 18: ...reflecting the cur rent programmed offset of the CsIII in this case 1 x 10 13 To change the offset fre quency enter a new value between 999999 and 999999 into the edit field and click Apply Changes t...

Page 19: ...including RF and 1PPS Note that the output frequency of the instrument is significantly perturbed by 1 x 10 9 for the duration of the adjustment For example phase advance of 1 ms intro duces a 1 x 10...

Page 20: ...ndition ceases the instrument restarts from its initial power on condition The current list of alarms is indicated by hexadecimal code in the alarm list on the Monitor3 main panel To see an annotated...

Page 21: ...of the alarm condition The time tag is composed of the date and time as realized by the CsIII event log clock and the total number of operating hours on the instrument 248 in the example above Becaus...

Page 22: ...Loop Tau enter a new value between 0 1 and 99 9 seconds in the edit field and press the Apply Changes button 3 9 COMMUNICATIONS Upon delivery the CsIII communicates with the following serial interface...

Page 23: ...edures are not required Do not disassemble components solely for the purpose of inspection During a component disconnection procedure such as a cable removal or replacement inspect components accordin...

Page 24: ...ents no danger since the Cesium is encased within a vacuum sealed metal enclosure Hazardous materials depending upon their specific nature are subject to certain shipping regulations of the USDOT and...

Page 25: ...ng companies for assistance If you need additional help contact customer support See contact listed in Appendix C Customer Assistance Technical Support Freight carriers typically request the following...

Page 26: ...CSIII MODEL 4310B User s Guide DS50003057A page 26 2021 Microchip Technology Inc NOTES...

Page 27: ...ovide a near ideal environment for continuously measuring the Cesium hyperfine transition All outputs of the CsIII are derived from an ovenized low phase noise 5 MHz quartz oscillator whose output fre...

Page 28: ...um hyperfine frequency tunable around 9192631770 Hz The Cesium beam tube CBT which produces an error signal proportional to the detuning of the RF from the Cesium hyperfine resonance frequency The mic...

Page 29: ...onstant temperature by the CBT power supply A collimator assembly at the output aperture of the oven forms a beam directed down the axis of the CBT An inhomogeneous magnetic field generated by the A m...

Page 30: ...om the ADC In the CsIII interrogations are performed at a rate of 38 Hz and with a dwell time of 23 ms The Cesium atom possesses a nuclear spin of I 7 2 In its unperturbed ground state the nuclear spi...

Page 31: ...CBT spectrum includes all seven allowed m 0 magnetic dipole transitions between the Zeeman sub levels of the two ground hyperfine states of Cesium With the exception of the central or Clock transition...

Page 32: ...ge is symmetrically positioned atop the Rabi pedestal this value reads zero In the unlikely event that the clock servo has locked to the wrong peak of the Ramsey fringe producing a clock output error...

Page 33: ...0 Hz The measurement result is exponentially filtered and used to adjust the C Field control voltage which gently steers the C Field current so as to drive the Zeeman Ramsey error to zero Monitor3 rep...

Page 34: ...he function of the numerical gain is to present a consistent discriminator slope to the control servos independent of the signal or background levels or DAC gain adjustment The numerical gain is a flo...

Page 35: ...5V In normal operation the Microwave Power Control Voltage may vary from 1 5V to 4V particularly in response to changes in ambient temperature 5 7 UNIT INITIALIZATION Upon power up the CsIII performs...

Page 36: ...ec voltage 5 of factory setting Major 0x05 Cfield current 16 mA or 22 mA Major 0x06 EM voltage control 7 V or 13V Major 0x07 CBT signal quality Signal quality degraded Minor Major 0x08 VCXO tuning vol...

Page 37: ...ear panel The following table lists the alarm connector pin out configuration A 2 OPTIONS Portability kit Includes handle and rubber feet p n 14959 101 DS1 Dual 1544 kbps outputs 1 balanced 1 unbalanc...

Page 38: ...CSIII Model 4310B User s Guide DS50003057A page 38 2021 Microchip Technology Inc NOTES...

Page 39: ...and list Note that this section is designed for experienced programmers and assumes a general knowledge of RS 232 interface programming B 1 GENERAL PARAMETERS The CsIII s factory default RS 232 settin...

Page 40: ...eature that is not currently installed that is commands which address features particular to other Microchip Cesium instruments the CsIII performs no action and echoes the command back to the user wit...

Page 41: ...relay cutoff No data required W18 Reserved for factory use W22 Arm 1PPS Sync circuit Issue this command after connecting a 1PPS source to the CsIII The sync remains armed for 3 seconds No data require...

Page 42: ...actory use A07 Reserved for factory use A08 Reserved for factory use A09 Reserved for factory use A10 Reserved for factory use A11 Reserved for factory use A12 Reserved for factory use A13 Reserved fo...

Page 43: ...Clock pedestal servo voltage difference 91 98 RR 0045 Zeeman servo voltage difference 99 103 Z 008 Zeeman pedestal servo voltage difference 104 111 RZ 0004 Oscillator servo output voltage 112 118 AR...

Page 44: ...CONSTANTS COMMAND D 2 Variable Field Example STX CR LF 1 3 Space 11 4 10 ID00025 Space 11 Day meter 12 14 006 Space 15 Time hour minute second 16 24 04h54mn32s Space 25 Spectrometer voltage nominal 2...

Page 45: ...ttery backed up real time clock the Event log stores two distinct timestamps The first is a 6 byte calendar date the second is a 32 bit value representing the total system power on hours Zeeman offset...

Page 46: ...CSIII Model 4310B User s Guide DS50003057A page 46 2021 Microchip Technology Inc NOTES...

Page 47: ...rt This product contains the software with the latest version at the time of manufacture Refer to user guides and any system release notices from the website for the latest ver sions of software and i...

Page 48: ...CSIII Model 4310B User s Guide DS50003057A page 48 2021 Microchip Technology Inc NOTES...

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