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4-52

WF1943B

4.7 Equivalent noise bandwidth

The density of noise generated by the WF1943B is as shown in the following figure (a) "Frequency
characteristics of noise generated by the WF1943B."
The effective values (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 density
[V/ Hz ]

About 320 kHz

-3dB

(a) Frequency characteristics of noise

generated by the WF1943B

(b) Frequency characteristics of white

noise

500kHz

Noise density
[V/ Hz ]

Frequency

Frequency

Effective values are equal

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Summary of Contents for WF1943B

Page 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...

Page 2: ......

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

Page 4: ......

Page 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...

Page 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...

Page 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...

Page 8: ......

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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Page 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...

Page 152: ......

Page 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...

Page 154: ......

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

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