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User’s Manual

Model 3502

Optical Chopper

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Содержание New Focus 3502

Страница 1: ...User s Manual Model 3502 Optical Chopper...

Страница 2: ......

Страница 3: ...rol and laboratory use in industrial locations Manufacturer Newport Corporation 1791 Deere Avenue Irvine CA 92606 Standards Applied Compliance was demonstrated to the following standards to the extent...

Страница 4: ...apply to products which have been repaired or modified without New Focus s written approval or products subjected to unusual physical thermal or electrical stress improper installation misuse abuse ac...

Страница 5: ...de secrets of New Focus and shall devote its best efforts to ensure that all its personnel protect the New Focus Programs as trade secrets of New Focus Customer shall not at any time disclose New Focu...

Страница 6: ...cal and Electronic Equipment WEEE 9 1 1 7 Control of Hazardous Substances 10 1 2 Warnings and Cautions 10 1 2 1 General Warnings 10 1 2 2 General Cautions 10 1 3 Location of Labels and Warnings 12 1 3...

Страница 7: ...mputer via USB 23 3 5 Operation 23 3 5 1 Front Panel Operation 24 3 6 Back Panel Operation 30 4 Computer Interfacing 32 4 1 Introduction 32 4 2 Using the Graphical User Interface GUI 32 4 2 1 A Quick...

Страница 8: ...monic Locking 46 6 7 External Voltage Control 46 6 8 General 46 7 Maintenance and Service 47 7 1 Enclosure Cleaning 47 7 2 Technical Support 47 7 3 Technical Support Contacts 47 7 4 Service 48 7 5 War...

Страница 9: ...e 9 Functional block diagram for Model 3502 Optical Chopper 17 Figure 10 Model 3502 Optical Chopper Head with wheel cover installed 18 Figure 11 Dimensions of Model 3502 Optical Chopper Head 19 Figure...

Страница 10: ...ual This symbol indicates that you should read the associated documentation to determine the nature of any potential hazards and any actions that should be taken against these hazards 1 1 2 Electrical...

Страница 11: ...OFF symbol The symbol in the figure above represents a power switch position on the Model 3502 Optical Chopper Controller This symbol represents a Power Off condition 1 1 6 Waste Electrical and Electr...

Страница 12: ...ent indoors only x The external input power to this equipment can be up to 240 VAC Please follow this User s Manual for proper use or installation of this instrument x Disconnect power before cleaning...

Страница 13: ...ay be impaired WARNING This instrument is intended for use by qualified personnel who recognize thermal shock or laser hazards and are familiar with safety precautions required to avoid possible injur...

Страница 14: ...12 1 3 Location of Labels and Warnings 1 3 1 Model 3502 Optical Chopper Controller Rear Panel Figure 8 Warning Certification and Information Label...

Страница 15: ...perations available through the front panel 2 1 1 Key Product Features A number of advanced features make the Model 3502 Optical Chopper an excellent choice for many applications x Extremely low jitte...

Страница 16: ...vious signs of physical damage that might have occurred during shipment Report any such damage to the shipping agent immediately NOTE Retain original packing materials in case reshipment becomes neces...

Страница 17: ...condensing 40 C 90 humidity non condensing Storage temperature 0 C 85 humidity non condensing 50 C 85 humidity non condensing Relative Humidity storage 85 Altitude 3000 meters 10000 feet Environment U...

Страница 18: ...es phase noise at the chopping frequency and provides for long term stable chopping with minimal frequency drift Figure 9 shows a block diagram of the Model 3502 Optical Chopper system Programmable di...

Страница 19: ...the motor mount Do not over tighten the set screws The Model 3502 Optical Chopper head may also be mounted on standard optical bench rods First loosen the two 20 set screws These secure the head to th...

Страница 20: ...18 Figure 10 Model 3502 Optical Chopper Head with wheel cover installed...

Страница 21: ...hown in Figure 12 below To install or change a wheel first power off the Chopper Controller Secure the chopping head to a work surface Remove the four 4 40 screws that secure the retaining cap over th...

Страница 22: ...20 Figure 12 Chopper wheels Top row 2 slot and 60 2 slot wheels Middle row 7 5 slot and 42 30 slot wheels Bottom row 60 slot and 100 slot wheels All wheels are 4 50 114 3 mm O D...

Страница 23: ...mm 0 394 10 00 mm 60 2 slot 0 295 7 50 mm 0 107 2 71 mm 7 5 slot 0 295 7 50 mm 0 394 10 00 mm 42 30 slot 0 135 3 44 mm 0 138 3 51 mm 60 slot 0 107 2 71 mm 100 slot 0 064 1 62 mm The wheel cover is als...

Страница 24: ...Model 3502 Optical Chopper 3 4 Initial Setup WARNING The Model 3502 Optical Chopper Controller is intended for use ONLY with New Focus Model 3502 Optical Chopper motor heads Connection of other devic...

Страница 25: ...the OFF position to turn power OFF to the internal electronics and fully disconnect the power cord of the Controller from mains power 3 4 2 Connecting the Chopper Head to the Chopper Controller Make s...

Страница 26: ...iments The table below summarizes the provided wheel selection and each wheel s chopping frequency range Wheel Type slots Lowest Frequency Fouter Highest Frequency Fouter 100 200 Hz 10 65 kHz 60 120 H...

Страница 27: ...d phase locked to the external signal In EXT and EXT modes the output from Synth Out described below is not locked to and does not have the same frequency as the external signal and remains at the fre...

Страница 28: ...be used as a frequency and phase reference in EXT and EXT modes TTL pulses can be used to trigger the Chopper Controller as long as they are longer than 1 Ps Synth Out The signal provided by the inte...

Страница 29: ...he significant digit to modify and this digit will blink The up and down arrow keys can be used to change the magnitude of the digit Set H and S In H S mode the user may lock the Chopper to a harmonic...

Страница 30: ...ory default settings Wheel is set to 42 30 Sync is set to INT Mode is set to NORMAL and the internal synthesizer frequency is set to 84 Hz Measure Button The Measure button is used to select which fre...

Страница 31: ...ith Fouter 7 5 Finner Int Fsync 12 7 Int Fsync i e Fouter Finner with Fouter 7 5 Finner Int Fsync Int Fsync Int Fsync 1 Ext Ext 2 7 Ext Fsync i e Fouter Finner with Fouter 7 5 Finner Ext Fsync 12 7 Ex...

Страница 32: ...vel signal at frequency H S Fsync In mode the frequency at OUT 1 is Fouter Finner and in NORMAL mode the frequency is 5 Fouter This information is also summarized in Table 2 on page 29 OUT 2 The funct...

Страница 33: ...odule The AC power is connected at the power entry module on the rear panel The power module has been chosen for global operation and North American and European power cords are supplied Motor Cable T...

Страница 34: ...he software on 32 bit or 64 bit operating systems Although the user can choose a custom installation directory the default location is under Program Files New Focus New Focus Chopper Application Three...

Страница 35: ...et by entering the value in Hz in the topmost text entry field and pressing the Set Freq button Similarly the chopping phase H and S can all be changed Note that although you can set values for the ch...

Страница 36: ...several conventions are used Some commands may be used to set and query an operating parameter For example the PHS command can be used to set the chopping phase PHS900 or to read the value of the phas...

Страница 37: ...quency to three significant digits 4 00 Hz to 99 9 kHz in EXT EXT mode range automatically limited in INT mode PHS Sets the phase delay 180 0 to 179 0 RCL Selects instrument set up for recall 0 9 0 fa...

Страница 38: ...2 Query Fouter FR3 Query frequency of OUT 1 FR4 Query frequency of OUT 2 Example The chopping frequency is 1 23 kHz and the Chopper is in NORMAL mode FR3 Query FR36150 0 Response The frequency at OUT...

Страница 39: ...0004 Response The firmware version is 1 16 the firmware date is 5 05 14 and the serial number of the unit is P0004 KEY Description Duplicates the action of pushing a front panel button Syntax KEY Rema...

Страница 40: ...trument set up to recall using the RCL command MEM1 recalls the selected set up Example STO5 Selects location 5 for setup storage MEM0 Saves setup in location 5 RCL1 Selects location 1 setup recall ME...

Страница 41: ...igits of resolution are available The data is entered in Hz and no decimal point should be included Example OSC54300 Command Sets the internal synthesizer to 543 Hz OSC Query OSC543 00 Response The in...

Страница 42: ...the instrument set up Example RCL0 Command Select factory default setup for recall MEM1 Command Recalls factory default setup RCL4 Command Select location 4 for setup recall RCL Query RCL4 Response T...

Страница 43: ...sed with MEMO to store the instrument set up Example STO9 Command Select location 9 for setup storage STO Query STO9 Response Location 9 is selected for setup recall MEM0 Command Recalls setup 9 SUB D...

Страница 44: ...INT SYN Query SYN3 Response Sync source is set to INT WHL Description Set and query the type of chopping wheel being used Syntax WHL Remarks The WHL command sets and queries the type of chopping whee...

Страница 45: ...er Check that the Chopper Head is connected to the Chopper Controller Do not connect the Chopper Head when the Chopper Control unit is powered on Fails test at start up Please contact New Focus for se...

Страница 46: ...ps then the signal supplied via Sync In may have been unstable Verify the stability of the input signal with an oscilloscope or frequency counter The frequency of the signal on Sync In may have been o...

Страница 47: ...150 5 7 5 14 Hz 746 Hz 1000 15 2 4 Hz 213 Hz 2000 50 6 2 Internal Synthesizer Stability 100 ppm after one hour warm up Drift Less than 10 ppm C Accuracy 1 5 of least significant digit Resolution 4 00...

Страница 48: ...n H S mode OUT 2 TTL level pulse Finner in NORMAL mode Fouter Finner in mode H 7 S Fsync in H S mode 6 5 Phase Shifter Range 180 0 to 179 0 Resolution 0 1 increasing to 0 25 at 6 4 kHz 6 6 Harmonic Lo...

Страница 49: ...will damage the finish of the enclosure 7 2 Technical Support Information and advice about the operation of any New Focus product is available from our technical support engineers Hours 8 00 5 00 PST...

Страница 50: ...ervice The Model 3502 Optical Chopper Controller and Chopper Head contain no user serviceable parts To obtain information regarding factory service contact New Focus Please have the following informat...

Страница 51: ...he motor is limited Long term high speed use of the motor will result in faster wear and a shorter lifetime Because of this limited lifetime the Chopper Head has a 90 day warranty while all other part...

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