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4-36

WF1943B

4.3 Modulation

Frequency modulation (FM) (

MODE

→

MODU

→

TYPE : FM)

Operation to produce a frequency modulated waveform output is described.
The example is a sinewave, 1 kHz, amplitude and DC offset arbitrary.

Operation:

(1) Set modulation TYPE to frequency (FM)

①

Press the

MODE

key, then the

MODU

key.

②

Use the

and

keys to produce the following display (TYPE flashes).

ＦＭ

ＰＭ

ＦＭ：ＴＹＰＥ

ＤＥＶＩＡＴＩＯＮＦＲＥＱＦＵＮＣＴＩＯＮ

③

Press the

ENTER

key, then use the

and

keys to produce the following display (FM

flashes).

ＦＭ

ＰＭ

ＦＭ：ＴＹＰＥ

ＤＥＶＩＡＴＩＯＮＦＲＥＱＦＵＮＣＴＩＯＮ

④

This sets the modulation type for frequency. Press the

EXIT

key once to release the type setting

mode.

Содержание WF1943B

Страница 1: ...INSTRUCTION MANUAL NF Corporation http www nfcorp co jp NF Corporation 6 3 20 Tsunashima higashi Kohoku ku Yokohama 223 8508 JAPAN WF1943B MULTIFUNCTION SYNTHESIZER MULTIFUNCTION SYNTHESIZER WF1943B...

Страница 2: ......

Страница 3: ...DA00012503 002 WF1943B MULTIFUNCTION SYNTHESIZER Instruction Manual...

Страница 4: ......

Страница 5: ...to a separate volume for a description of remote control GPIB or USB Section 1 Overview Provides a general description of the equipment and a simple outline of the operating principles Section 2 Prep...

Страница 6: ...device to the electric ground which ground resistance is less than 100 Confirm power source voltage Before connecting this equipment check that the proper voltage is being supplied to the power outle...

Страница 7: ...ral definitions of the symbols and indications used in the text and on the product Advises of possible hazard to the user as well as the need to consult this manual when using an operation or function...

Страница 8: ......

Страница 9: ...epacking 2 2 2 2 Power source and grounding 2 3 Grounding 2 3 Line filter 2 3 Power source 2 3 Power supply fuse 2 5 2 3 Installation 2 6 Cautions 2 6 Installation conditions 2 6 Panel and case cleani...

Страница 10: ...13 4 2 Sweep 4 16 Sweep Mode Single 4 16 Sweep Mode Continuous 4 22 Sweep Mode Gated 4 26 CENTER SPAN 4 33 Summary of the sweep setting items 4 34 Sweep Modulation steps and step width 4 35 Sweep valu...

Страница 11: ...13 Setting recall 5 14 Setting memory clear 5 15 5 4 Other settings 5 16 Output range change use with fixed range 5 16 Output on off at power on 5 17 LOAD function equalize setting and output values 5...

Страница 12: ...DC offset accuracy 7 6 Amplitude vs frequency characteristics 7 7 Sinewave distortion 7 7 Squarewave response 7 8 Duty factor 7 8 z Section 8 Specifications 8 1 8 1 Waveform and output characteristic...

Страница 13: ...WF1943B 1 1 Section 1 Overview 1 1 Features 1 2 1 2 Operating principles 1 3 Block diagram 1 3 1 3 Function outline 1 4 Function tree 1 4...

Страница 14: ...d actual output voltages when an arbitrary load impedance in connected z Convenient use as a pulse generator with pulse period width high level and low level setting and display A trigger delay functi...

Страница 15: ...CPU and DDS provides floating functions z The DDS Direct Digital Synthesizer uses an original LSI device and generates digital data of the setting frequency z The waveform memory converts digital dat...

Страница 16: ...g The DC offset can be set by the keypad or modify dial Phase setting Phase between channels and oscillation starting phase during burst oscillation can be set Output on off The waveform and sync sign...

Страница 17: ...2 Unpacking and repacking 2 2 2 2 Power source and grounding 2 3 Grounding 2 3 Line filter 2 3 Power source 2 3 Power supply fuse 2 5 2 3 Installation 2 6 Cautions 2 6 Installation conditions 2 6 Pan...

Страница 18: ...Instruction Manual 1 0105 Arbitrary Waveform Editor CD ROM 1 Supplied accessories Power cable 3 conductors 1 Fuse 100 115 V 1 A or 230 V 0 5 A 1 Time lag 250 V 5 2 20 mm For information on how to use...

Страница 19: ...cable to connect to a 3 terminal power outlet that has a protective ground contact Line filter The WF1943B uses a line filter that incorporates the circuit below Because the maximum leakage current i...

Страница 20: ...n the back of the unit 4 Insert the power cable plug into a 3 terminal wall socket With a screwdriver move the slide control of the source voltage change over switch to the line indicating the source...

Страница 21: ...specified rating There is risk of fire from an improperly rated fuse Be sure to disconnect the power cable before replacing the fuse Fuse Time lag 1 A 100 115 V or time lag 0 5 A 230 V 250 V 5 2 20 mm...

Страница 22: ...to 25 g m3 Ambient storage conditions 10 to 50 C 5 to 95 RH no condensation at an absolute humidity of 1 to 29 g m3 Pollution degree 2 Avoid installing the equipment in the following types of locatio...

Страница 23: ...ormance criteria for the following standards are as follows EN61000 4 2 1995 EN61000 4 4 1995 EN61000 4 5 1995 and EN61000 4 11 1994 B The following cables are used for the test of EN 61326 1997 A1 19...

Страница 24: ...WF1943B 2 8 2 5 Calibration Section 7 3 the Performance tests are recommended at least once a year These should also be conducted before important tests and measurements...

Страница 25: ...gger sweep input TRIG SWEEP IN 3 9 3 3 Basic operation 3 10 Setting initialize PRESET 3 10 Oscillation mode selection 3 13 Waveform selection 3 14 Frequency setting 3 17 Amplitude setting 3 18 DC offs...

Страница 26: ...3 2 WF1943B 3 1 Panel description This section describes the indications and functions of the front and rear panels of the WF1943B...

Страница 27: ...tude offset and load impedance settings in addition to information to assist when setting Lamps light to indicate present oscillation mode and waveform selection Lamp lights to indicate output range W...

Страница 28: ...3 1 Panel description 3 4 WF1943B Rear panel Inspection label Nameplate Fan exhaust Fuse holder page 2 5 Power supply input page 2 3 GPIB connector...

Страница 29: ...C offset the OVER lamp flashes and the output is clipped 10 V range Approx 11 Vp open 1 V range Approx 1 1 Vp open Output connection note The FUNCTION OUT impedance is 50 By using coaxial cable with 5...

Страница 30: ...d shorting the output or applying an external signal The unit can be damaged Output connection note The SYNC OUT impedance is 50 By using coaxial cable with 50 characteristic impedance for connection...

Страница 31: ...is also produced in the FUNCTION OUT waveform Rising and falling edge hysteresis zones vary with phase history Above 100 kHz with stop level off At other times see example below Approximately 25 ns p...

Страница 32: ...tart to stop points High level at other times 4 2 Sweep Sweep value and SYNC OUT cf 4 Modulation mode MODU High level when modulation waveform phase is above 0 and less than 180 degrees Low level abov...

Страница 33: ...pprox 10 k Ground Connected to chassis ground Do not apply a signal exceeding the above input voltage range The unit can be damaged Drive circuit examples Connect the trigger and sweep input drive sig...

Страница 34: ...Setting initialize PRESET The operation of initializing all settings is described This instruction manual presumes operation directly after initializing Operation Press the SYSTEM key then use the and...

Страница 35: ...DELAY 0 3 s When TYPE TRIG MARK 1 0 When TYPE BURST TRIG SPACE 1 0 When TYPE BURST MODE BURST STOP LEVEL OFF 0 at ON TYPE FREQ SOURCE EXT 1 ms at INT When MODE SINGLE GATED MODE SINGLE FUNCTION LIN T...

Страница 36: ...e Key operation Menu Initial settings Remarks ENTRY WIDTH 0 0005 s In case of FUNCTION ENTRY DUTY 50 In case of FUNCTION ENTRY PERIOD 0 001 s ENTRY HIGH 0 05 V ENTRY LOW 0 05 V FUNCTION RANGE AUTO LOA...

Страница 37: ...te noise output DC DC output Operation The selected oscillation mode is indicated in the STATUS area which is located to the left of MODE key When the MODE key is pressed the MODE key lamp lights and...

Страница 38: ...elect another waveform one whose key lamp is already lit press the key of the waveform Operation example In this example a triangular waveform is selected Press the FUNCTION key then the key The STATU...

Страница 39: ...to suppress the output of multiple pulses in one cycle Therefore set DUTY VALID to CYCLE Note however that this setting cannot be made if the oscillation mode is SWEEP or MODU 3 4 If DUTY VALID is set...

Страница 40: ...DUTY VALID to EXPAND 3 4 It is not possible to set CYCLE and EXPAND simultaneously If DUTY VALID is set to IMMED or CYCLE the range in which the duty can be set is 0 0100 to 99 9900 When the frequency...

Страница 41: ...the k key After setting press the EXIT key to exit the setting mode 2 Modify dial This is convenient for continuously setting the frequency Press the ENTRY key then the FREQ key Select the digit to b...

Страница 42: ...entry press the BS key before pressing ENTER key This completes setting afterwards press the EXIT key 2 Modify dial The amplitude can be changed continuously Press the ENTRY key then the AMPTD key Se...

Страница 43: ...OFFSET key The following display is produced DC offset Frequency Amplitude Press the 1 key then the ENTER key To correct an entry press the BS key before pressing ENTER This completes setting afterwa...

Страница 44: ...Press the ENTRY key then the PHASE key The following display is produced Phase Frequency Amplitude Press keys 9 and 0 then the ENTER key To correct an entry press the BS key before pressing ENTER This...

Страница 45: ...n WF1943B 3 21 Output on off Output on off setting is described Operation Press the OUTPUT ON OFF key The setting alternates between on and off each time the key is pressed The lamp lights when on ext...

Страница 46: ...BURST TRIG SPACE Number of times signal not present For TYPE BURST STOP LEVEL Stop level BURST Operation MAN TRIG SWEEP Menu TYPE Sweep target FREQ PHASE SOURCE Trigger source selection For MODE SINGL...

Страница 47: ...RY Main operation FREQ AMPTD OFFSET PHASE DUTY WIDTH PERIOD HIGH LOW DUTY WIDTH for FUNCTION FUNCTION Waveform selection ARB ARB EDIT Arbitrary waveform menu For FUNCTION ARB SELECT Select arbitrary w...

Страница 48: ...n SYNC Phase initialization DUTY VALID Duty POWER ON Output state selection at power on REMOTE Remote control menu INTERFACE Interface ADDRESS ID GPIB address USB ID DELIMITER GPIB delimiter MEMORY Se...

Страница 49: ...and SYNC OUT 4 35 4 3 Modulation 4 36 Frequency modulation FM 4 36 Phase modulation PM 4 39 4 4 Arbitrary Waveform 4 42 Arbitrary waveform ARB 4 42 4 5 Selecting waveforms of synchronous signals SYNC...

Страница 50: ...ure In this example the waveform is triangular the DC offset is set to 0 V the oscillation start phase is set to 0 degrees and the frequency and amplitude are set to arbitrarily defined values Operati...

Страница 51: ...2 0 cycles After setting press the EXIT key once to exit mark cycle setting 3 Set SPACE cycle Use the and keys to produce the following display SPACE flashes Press the ENTER key Set the space cycles w...

Страница 52: ...cle even though the frequency is set to less than 5 MHz If such a shift occurs set the continuous oscillation and then the burst oscillation Stop level off Oscillation stops at the phase set by ENTRY...

Страница 53: ...rm output such as indicated in the figure in response to an external trigger The example is a triangular waveform DC offset 0 V frequency and amplitude arbitrary Operation 1 Set the burst oscillation...

Страница 54: ...the MODIFY dial to select rising trigger indicates falling trigger After setting press EXIT once to release trigger source setting 3 Set DELAY time Use the and keys to produce the following display D...

Страница 55: ...to release mark cycle setting 5 Set STOP LEVEL Use the and keys to produce the following display STOP LEVEL flashes 3 Press the ENTER key Turn the MODIFY dial to produce the following display ON flash...

Страница 56: ...on stops at the phase set by ENTRY PHASE setting mark cycle is integer Manual trigger Press theMAN TRIG key then set the trigger source to EXT Operation is based on the logical OR of the external sign...

Страница 57: ...put such as indicated in the figure in response to an external gate signal The example is a triangular waveform DC offset 0 V oscillation start phase 0 degrees frequency and amplitude arbitrary Operat...

Страница 58: ...ress the ENTER key Turn the MODIFY dial to produce the following display ON flashes Press the key then set the stop level with the keypad or MODIFY dial In this example the setting is 0 The stop level...

Страница 59: ...the MAN TRIG key The gate signal is on i e oscillation while the key is pressed In this case set the trigger source for EXT L ON To generate the trigger signal via remote control GPIB or USB set the T...

Страница 60: ...form DC offset 0 V oscillation start phase 0 degrees frequency and amplitude arbitrary Stop level 100 0 Trigger signal TRIG SWEEP IN Oscillation starts at trigger Oscillation stops at end of a half cy...

Страница 61: ...roduce the following display STOP LEVEL flashes Press the ENTER key Turn the MODIFY dial to produce the following display ON flashes Press the key then set the stop level with the keypad or MODIFY dia...

Страница 62: ...gnal after the oscillation has stopped If oscillation is from an external signal oscillation will not stop even if the MAN TRIG key is pressed Oscillation stops during power on To generate the trigger...

Страница 63: ...produce a waveform output with frequency that varies linearly and continuously is described The setting example is a sinewave with arbitrary amplitude and DC offset Operation 1 Set sweep MODE to SING...

Страница 64: ...e following display FREQ flashes 4 This sets the sweep type for frequency Press the EXIT key once to release the type setting mode 3 Select sweep FUNCTION Use the and keys to produce the following dis...

Страница 65: ...dial For example set to 100 Hz After setting press the EXIT key once to release the start frequency setting mode 5 Set STOP frequency Use the and keys to produce the following display STOP flashes 3 4...

Страница 66: ...operation Sweep starts when the START key is pressed When sweep is started an existing output frequency is quickly changed to the start frequency If desiring to set the start frequency output beforeha...

Страница 67: ...input within 100 ms of completion of the last sweep are ignored The trigger delay for the first sweep after power on or a parameter change is 40 ms Otherwise it is 2 ms Power on or a sweep parameter s...

Страница 68: ...n if set to less 4 START STATE and STOP STATE Respectively set the output to start and stop values Since the sweep synchronization output becomes the respective start and stop states the state of exte...

Страница 69: ...eform output with linear and continuously frequency The waveform is a sinewave with arbitrary Amplitude and DC offset Operation 1 Set sweep MODE to continuous CONT Press the MODE key then the SWEEP ke...

Страница 70: ...following display FREQ flashes 4 This completes setting the sweep type to frequency Press the EXIT key once to release the setting mode 3 Select the sweep FUNCTION Use the and keys to produce the fol...

Страница 71: ...ency STOP Use the and keys to produce the following display STOP flashes 3 4 Press the ENTER key Set the stop frequency with the key pad or MODIFY dial For example set to 1000 Hz After setting press t...

Страница 72: ...type For example provides step type change of output e g frequency at the sweep time halfway point LIN LOG provides linear or logarithmic variation of the output with respect to the time axis i i i i...

Страница 73: ...e a waveform output with frequency that varies in step form and oscillation stops is described The setting example is a sinewave with arbitrary amplitude and DC offset 0 Operation 1 Set sweep MODE to...

Страница 74: ...owing display FREQ flashes 4 This completes setting the sweep type to frequency Press the EXIT key once to release the setting mode 3 Select the sweep FUNCTION Use the and keys to produce the followin...

Страница 75: ...dial For example set to 100 Hz After setting press the EXIT key once to release the start frequency setting mode 5 Set the STOP frequency Use the and keys to produce the following display STOP flashes...

Страница 76: ...setting mode 7 Set the STOP LEVEL Use the and keys to produce the following display STOP LEVEL flashes 3 4 Press the ENTER key Turn the MODIFY dial to produce the following display ON flashes 3 4 Pre...

Страница 77: ...4 2 Sweep WF1943B 4 29 8 Start sweep Press the START key In this example sweep ends after 3 seconds and oscillation stops Again press the START key to sweep from the stop to the start frequency...

Страница 78: ...e the sweep trigger source to EXT and select rising or falling Supply an external signal to the front panel TRIG SWEEP IN connector Observe that retrigger is not accepted for 100 ms after sweep start...

Страница 79: ...and STOP STATE oscillation can be conducted together with a gated sweep Since sweep synchronization output becomes the respective start and stop states full scale adjustments of the recorder and the...

Страница 80: ...SPAN however if the sweep type is set from a user unit that has the log function When start is changed Stop does not change CENTER START STOP 2 SPAN START STOP When stop is changed Start does not chan...

Страница 81: ...IN SIN LOG SIN LIN LOG START sweep start value STOP sweep stop value or Sweep range setting CENTER sweep center value SPAN sweep width TIME sweep time s STOP LEVEL Set when the sweep mode is GATED PHA...

Страница 82: ...ion 1 Sweep function is step Step number Sweep time s 10000 raise up even number 1 2 Sweep function is other than step and sweep type is frequency Sweep time is 25 ms and below Step number Sweep time...

Страница 83: ...4 2 Sweep WF1943B 4 35 Sweep value and SYNC OUT Approximately 100 to 125 s...

Страница 84: ...Hz amplitude and DC offset arbitrary Operation 1 Set modulation TYPE to frequency FM Press the MODE key then the MODU key Use the and keys to produce the following display TYPE flashes Press the ENTER...

Страница 85: ...press the EXIT key once to exit frequency deviation setting 3 Set the modulation FREQ Use the and keys to produce the following display FREQ flashes Press the ENTER key Set the frequency with the keyp...

Страница 86: ...ompletes frequency modulation setting Other operations When the oscillation mode is changed to modulation MODU modulation occurs at the setting at that time point To stop modulation Press the STOP key...

Страница 87: ...n start phase is set to 0 degrees and the frequency and amplitude are set to arbitrarily defined values Operation 1 Set modulation TYPE to phase PM Press the MODE key then the MODU key Use the and key...

Страница 88: ...to release the phase deviation setting mode 3 Set the modulation FREQ frequency with varying phase Use the and keys to produce the following display FREQ flashes Press the ENTER key Set the frequency...

Страница 89: ...ove completes phase modulation setting Other operations When the oscillation mode is changed to modulation MODU modulation occurs at the setting at that time point To stop modulation Press the STOP ke...

Страница 90: ...he ARB key 2 Select an arbitrary waveform to be edited output SELECT Press the ARB EDIT key then use the and keys to produce the following display SELECT flashes 4 4 Press the ENTER key then use the a...

Страница 91: ...waveform for example sinewave Press the ARB EDIT key then use the and keys to produce the following display COPY flashes 4 Press ENTER key then use the and keys to produce the following display SIN f...

Страница 92: ...AD digit flashes 4 Set the waveform address AD with the keypad or MODIFY dial For example set to 1024 Press the m key to produce the following display the asterisk is displayed 4 is interpolation type...

Страница 93: ...interpolation between the starred addresses Press the EXIT key then use the and keys to produce the following display MARK CLEAR flashes 3 Press the ENTER key twice to clear the interpolation marks fr...

Страница 94: ...o an arbitrary waveform ARB EDIT NAME select ENTER then use the MODIFY dial to select the characters Shift position with and and input Up to 8 characters can be input Following are the usable characte...

Страница 95: ...NC OUT waveform After setting press the EXIT key to release the SYNC OUT waveform setting mode When the oscillation mode is BURST STATE Low level during oscillation High level while stopped PHASE For...

Страница 96: ...level while between 180 and 360 degrees Sweeping FUNCTION OUT SYNC OUT SYNC OUT STATE SYNC OUT SYNC OUT PHASE When the oscillation mode is MODU STATE STATE Low level while executing modulation and be...

Страница 97: ...rees 2 degrees approximately In particular note that when the oscillation mode is switched during a burst or gated sweep while oscillation is stopped the output level may vary or the waveform may beco...

Страница 98: ...stepwise variations discontinuities are generated If such discontinuities are removed the remaining variations have the appearance shown below If as an extreme example the oscillation frequency is 1 k...

Страница 99: ...ate interval 100 to 252 s If the sweep function FUNCTION is triangular and the change rate of phase is large Output waveform Extra pulses are produced The occurrence frequency when the sweep function...

Страница 100: ...es rms of a are equal to those of white noise in the figure b Frequency characteristics of white noise that follows This equivalent bandwidth 500 kHz is called the equivalent noise bandwidth Noise den...

Страница 101: ...er unit setting 5 9 5 3 Setting memory 5 13 Setting store 5 13 Setting recall 5 14 Setting memory clear 5 15 5 4 Other settings 5 16 Output range change use with fixed range 5 16 Output on off at powe...

Страница 102: ...IOD key to produce the following display Set the period with the keypad or MODIFY dial Other The period setting is frequency with the reciprocal less than 0 01 Hz the number should be rounded off Thus...

Страница 103: ...width WIDTH Duty DUTY Frequency FREQ Changed Changed Unchanged Period PERIOD Changed Unchanged Changed Pulse width WIDTH Unchanged Unchanged Changed Duty DUTY Unchanged Unchanged Changed Due to the os...

Страница 104: ...fects on other parameters when the frequency period width or duty is changed Change Frequency FREQ Period PERIOD Pulse width WIDTH Duty DUTY Frequency FREQ Changed Changed Unchanged Period PERIOD Chan...

Страница 105: ...is described Select the waveform type for squarewave Operation Press the ENTRY key then the HIGH key to produce the following display Set the High level with the keypad or MODIFY dial For example set...

Страница 106: ...changed Changed Changed DC offset OFFSET Unchanged Changed Changed High level HIGH Changed Changed Unchanged Low level LOW Changed Changed Unchanged Due to the relationships between high and low level...

Страница 107: ...units e g the k of 1 kHz As an example the frequency units are changed Operation Press the ENTRY key then the FREQ key Press the k key to change the display as follows Other Unit change enable Only wh...

Страница 108: ...ghts Turn the MODIFY dial to produce the following display Other The following units can be used Vp p Vrms dBV dBm 1 USER 2 1 Selectable when LOAD function is SET 2 Set User units name is displayed No...

Страница 109: ...ion 1 Select setting type for example frequency Press the SYSTEM key then use the and keys to produce the following display USER UNIT flashes 4 Press the ENTER key then use the and keys to produce the...

Страница 110: ...y z s p a c e A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9 _ After inputting press the EXIT key once to release unit name setting 3 Select the FORMULA for example h n m The...

Страница 111: ...scale setting mode 5 Set the offset OFFSET n for example to 0 Use the and keys to produce the following display OFFSET n flashes 3 Press the ENTER key then set the offset with the keypad or MODIFY dia...

Страница 112: ...en using user units for the DC offset and phase in LOG selection note the following If a negative value is set before the conversion to user units is made an attempt is made to calculate the logarithm...

Страница 113: ...the memory may also be omitted Select characters with the MODIFY dial and shift position with the and keys Up to 20 characters can be selected from the following list a b c d e f g h i j k l m n o p...

Страница 114: ...s In this example TEST 1 is recalled from memory Press ENTER key for recall Other If the keypad is pressed at above step the pressed memory number is recalled Only the stored numbers of the keypad lig...

Страница 115: ...he MEMORY key then use the and keys to produce the following display CLEAR flashes Press the ENTER key then use the and keys to produce the following display 0 flashes In this example TEST 1 is cleare...

Страница 116: ...output voltage below 2 Vp p open setting resolution is 1 digit less than the 1 V range Operation Press the SYSTEM key then use the and keys to produce the following display RANGE flashes 4 Press the E...

Страница 117: ...en the power supply was switched off or output on off state The example is setting the output for off at power on Operation Press the SYSTEM key then use the and keys to produce the following display...

Страница 118: ...and keys to produce the following display LOAD flashes 3 4 Press the ENTER key then turn the MODIFY dial to produce the following display SET flashes 3 4 Press the key then turn the MODIFY dial to set...

Страница 119: ...he previous state Operation Press the UNDO to return a setting to the previous state ineffective when UNDO is extinguished Other Undo enabled 1 Directly after changing frequency amplitude etc with the...

Страница 120: ...and the Low level to 0 V ENTRY HIGH 5 ENTER ENTRY LOW 0 ENTER Set the period to 2 ms ENTRY PERIOD 2 m Set the pulse width to 0 2 ms ENTRY WIDTH 2 m 2 Use external trigger for pulse output Set the wav...

Страница 121: ...TYPE TRIG SOURCE EXT DELAY 0 1 ms MARK 1 0 cycle STOP LEVEL ON 100 Apply the trigger signal to the TRIG SWEEP IN connector Other Double pulse output At above step set MARK 2 0 cycles Manual trigger A...

Страница 122: ...ation and waveform output when the phase 0 degrees Operation Press the SYSTEM key then use the and keys to produce the following display SYNC flashes 3 4 Press the ENTER key to perform phase initializ...

Страница 123: ...WF1943B 6 1 Section 6 Troubleshooting 6 1 Error message 6 2 Power on error 6 2 Operation error 6 3 6 2 Suspected failure 6 6 In case of abnormality 6 6...

Страница 124: ...error Error message Cause Corrective measures BACKUP MEMORY LOST Battery backup memory contents destroyed Backup battery probably depleted Contact dealer Press the ENTER key to start the system at the...

Страница 125: ...d sweep cannot be executed SETTINGS CONFLICT 002 Combined center and span exceed the permissible sweep type e g frequency setting range SETTINGS CONFLICT 003 Combined modulation type e g frequency and...

Страница 126: ...e width may be unstable large jitter component WARNING 003 Since high frequency burst oscillation mark and space may be unstable WARNING 004 Low level setting changed due to high level setting change...

Страница 127: ...WARNING 013 Sweep time or modulation frequency exceeded the settable range and was automatically changed to within the permissible setting range WARNING 015 Because of DUTY VALID change the duty was c...

Страница 128: ...ective Contact service Ambient temperature and humidity outside specified range Use the equipment under the specified environmental conditions Inadequate warm up Allow the equipment to warm up for at...

Страница 129: ...s 7 3 Preparatory checks 7 3 Function checks 7 3 7 3 Performance tests 7 5 Performance tests 7 5 Preparatory checks 7 5 Test preparation 7 5 Frequency accuracy 7 5 Amplitude accuracy 7 6 DC offset acc...

Страница 130: ...r or dealer regarding more thorough inspection adjustment calibration and repair Do not remove external covers Internal inspection of this equipment must be performed only by a trained service technic...

Страница 131: ...cf If an abnormal indication appears at power on switch power off and wait at least 5 seconds then again switch power on z Main function checks To avoid setting error initialize the settings SYSTEM P...

Страница 132: ...erature the backup period is typically 3 years but may vary among individual units and usage conditions To prevent any loss of setting information resulting from a depleted battery regular battery rep...

Страница 133: ...l RG 58A U or thicker less than 1 meter length and fitted at both ends with BNC connectors z Where items call for 50 termination set the input impedance of the connected instrument to 50 Where this is...

Страница 134: ...Vp p open 3 536 Vrms open 3 493 to 3 578 Vrms 10 V 5 Vp p open 1 768 Vrms open 1 738 to 1 798 Vrms 10 V 2 Vp p open 0 707 Vrms open 0 684 to 0 730 Vrms 1 V 2 Vp p open 0 7071 Vrms open 0 699 to 0 716...

Страница 135: ...e Waveform 1 kHz Setting to 500 kHz to 1 MHz to 3 MHz to 10 MHz to 15 MHz Reference value 0 2 0 3 dB 0 2 0 3 dB 0 35 0 7 dB 0 5 1 5 dB 0 5 2 0 dB Reference value 0 3 dB Reference value 0 3 dB 0 3 dB R...

Страница 136: ...ty factor Connection Use coaxial cable to connect Function Out to a universal counter 50 terminated Settings Initialize the settings then set amplitude to 20 Vp p and waveform and frequency according...

Страница 137: ...tput characteristics 8 2 8 2 Output voltage 8 4 8 3 Other functions 8 5 8 4 Initialized settings 8 9 8 5 Remote control 8 10 8 6 General items 8 11 External drawing 8 12 Guaranteed values are shown wi...

Страница 138: ...ng value 40MHz waveform data size words Analog band width 10MHz 0 01 Hz to 500 kHz 0 01 Hz to 15 MHz 0 01 Hz 5 ppm 3 ppm year Frequency equivalent to inverse number of the setting period If the number...

Страница 139: ...Vp p 50 normalized frequency 1 kHz effective rms value measurement Up to 1 MHz 0 2 dB 0 3dB 1 MHz to 3 MHz 0 35 dB 0 7 dB 3 MHz to 10 MHz 0 5 dB 1 5 dB 10 MHz to 15 MHz 0 5 dB 2 0 dB Up to 1 MHz 0 3 d...

Страница 140: ...05 Vp p open 1 V range 0 7 of amplitude setting Vp p 0 01 Vp p open 10 V range 10 000 V open 1 V range 1 0000 V open 10 V range 1 mV open 1 V range 0 1 mV open DC mode 10 V range 0 5 of DC offset set...

Страница 141: ...number at the time of burst Phase from oscillation stop to oscillation start 1800 000 to 1800 000 0 001 Selectable internal trigger oscillator or external trigger input Trigger can be applied from th...

Страница 142: ...tes start of single gated sweep 100 ms and more If applying less than 100 ms trigger is at 100 ms intervals Selectable internal trigger oscillator or external trigger input Also applicable from panel...

Страница 143: ...rigger input for gate trigger and trig d gate 0 5 V open Low level sweeping from start to stop High level Other times If sweep high level for about 0 2 ms to 0 5 ms directly before quick change from s...

Страница 144: ...at actual voltage for an arbitrary load Conversion formula Output voltage at load Output voltage at no load impedance Load 50 impedance Output impedance Load 45 to 999 1 z Output on off Function Outp...

Страница 145: ...in turning on LAST STATE condition just before power off Setting memory Setting memory comment ALL NOT STORED blank User unit name USER User unit computation formula h n m User unit coefficient 1 Use...

Страница 146: ...service request functions RL1 All remote local functions PP0 No parallel poll functions DC1 All device clear functions DT1 All device trigger functions C0 No controller functions ISO 7 bit codes ASCII...

Страница 147: ...oling rear exhaust z Setup condition Horizontal Within 10 z Environmental conditions Ambient temperature and humidity range Performance guarantee 5 to 35 C 5 to 85 RH no condensation at an absolute hu...

Страница 148: ...ctions 8 12 WF1943B External drawing Front panel Rear panel Side view Surface preparation Front panel Plastic sheet Black4C Frame Painting Metallic gray Cover Polyvinyl chloride metal laminated plate...

Страница 149: ...CTION OUT 3 5 HIGH 5 5 5 6 k 4 45 5 7 LOW 5 5 5 6 m 4 44 5 7 M 5 7 MAN TRIG 4 8 4 11 5 21 MEMORY 5 13 MODE 3 13 4 2 4 15 4 36 MODU 3 8 3 13 4 36 4 38 4 39 4 41 4 48 NOISE 3 8 3 13 3 16 3 17 5 8 NORMAL...

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Страница 151: ...t without any charge for the parts and labor or either repair or replace products which prove to be defective For repair service under warranty the product must be returned to a service center designa...

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Страница 153: ...e Information provided in this manual is intended to be accurate and reliable However we assume no responsibility for any damage regarding the contents of this manual We assume no responsibility for i...

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Страница 156: ...http www nfcorp co jp NF Corporation 6 3 20 Tsunashima higashi Kohoku ku Yokohama 223 8508 JAPAN...

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