Page 1 MULTIFUNCTION GENERATOR WF1947/WF1948 Instruction Manual (Operations) NF Corporation...
Page 3 DA00037851-002 MULTIFUNCTION GENERATOR WF1947/WF1948 Instruction Manual (Operations)
Page 5 ——— Preface ——— Thank very much purchasing "Multifunction Generator WF1947/WF1948". To ensure safe and proper use of this electric equipment, please read first "Safety Precautions" on the following pages. Caution symbols used in this manual The following caution symbols are used in this manual. Be sure to observe these caution symbols and their contents to ensure the safety of the user and avoid damage to the equipment.
Page 6 Synchronizing Multiple Units This chapter describes how to configure a multi-phase oscillator by connecting multiple units of this product. Using External Frequency Reference This chapter describes how to use external frequency reference. 10. Using User-defined Units This chapter describes the units which users can define by themselves. 11.
Page 7: Safety Precautions
——— Safety Precautions ——— To ensure safe use, be sure to observe the following warnings and cautions. NF Corporation shall not be held liable for damages that arise from a failure to observe these warnings and cautions. This product is a Class I equipment (with protective conductor terminal) that conforms to the JIS and IEC insulation standards.
Page 8  Do not modify the product. Absolutely never modify this product, as this may cause new hazards and may disqualify this product from repair in case of failure.  Safety-related symbols The general definitions of the safety-related symbols used on this product are provided below. Instructions Manual Reference Symbol This symbol is displayed to alert the user to potential danger and refer him/her to the instruction manual.
Page 9: Table Of Contents
Table of Contents Page Outline ..........................1-1 Features ........................1-2 Operating Principles ....................1-3 Preparations before Use ....................2-1 Checking Before Use ....................2-2 Installation ....................... 2-4 Grounding and Power Supply Connection .............. 2-5 Calibration ........................ 2-6 Panels and I/O Terminals ....................3-1 Panel Component Names and Functions ..............
Page 10 4.3.7 Operations Available on Utility Screen ............. 4-19 4.3.8 To Restore Initial Settings ................. 4-21 4.3.9 Output On/Off Operation ................4-21 Setting Methods for Main Items ................4-23 4.4.1 Configuration of Text Display Screen in Continuous Oscillation Mode .. 4-23 4.4.2 To Set Oscillation Mode ................
Page 11 4.7.7 Setting DC Offset Sweep ................4-79 4.7.8 Setting Duty Sweep..................4-81 Setting and Operation of Burst ................4-83 4.8.1 Burst Oscillation Types ................4-83 4.8.2 Auto Burst ....................4-84 4.8.3 Trigger burst ....................4-87 4.8.4 Gate Oscillation ................... 4-92 4.8.5 Triggered Gate Oscillation .................
Page 12 Other Utility Settings ....................11-1 11.1 Selecting Remote Interface [Remote] ..............11-2 11.2 Display Setting [Display] ..................11-2 11.3 Modify Knob and Modify Direction Setting [Modify Direction] ......11-2 11.4 Operation Sound Setting [Sound] ................. 11-3 11.5 Self Diagnosis [Self Check] ..................11-3 11.6 Product Information Display [Information] ............
Page 13 15.5.1 Sine Wave ....................15-5 15.5.2 Rectangular Wave ..................15-5 15.5.3 Pulse Wave ....................15-6 15.5.4 Ramp Wave ....................15-7 15.6 Modulated Oscillation Mode .................. 15-7 15.6.1 General ......................15-7 15.6.2 FM ........................ 15-8 15.6.3 FSK ......................15-8 15.6.4 PM ........................ 15-9 15.6.5 PSK ......................
Page 14 Attached Figures and Tables Page Figure 1-1 WF1947 Block Diagram ....................1-3 Figure 1-2 WF1948 Block Diagram ....................1-4 Figure 3-1 Front Panel of WF1947 ....................3-2 Figure 3-2 Rear Panel of WF1947 ....................3-3 Figure 3-3 Front Panel of WF1948 ....................3-4 Figure 3-4 Rear Panel of WF1948 ....................
Page 15: Outline
1. Outline Features ........................1-2 Operating Principles ....................1-3 WF1947/WF1948...
Page 16: Features
1.1 Features Features NF's WAVE FACTORY, "Multifunction Generator WF1947" and "Multifunction Generator WF1948" are multifunctional oscillators based on DDS (Direct Digital Synthesizer). WF1947 is a 1-channel device, while WF1948 is a 2-channel device. • Highest frequency: 30MHz (sine wave), 20MHz (square wave, pulse) •...
Page 17: Operating Principles
1.2 Operating Principles Operating Principles ■ WF1947 block diagram Approx. 230 kS/s ±1V 約230kS/s MOD/ADD 波形メモリ Waveform 8Mbit memory ANALOGCONT. 50kHz Bessel 512Kw 外部変調/ External modulation/ CPLD Vref 10MHz BW SSRAM External addition 外部加算/ switching 切換え PG AMP ±10V PG AMP CONT FCTN アイソレーション...
Page 18: Figure 1-2 Wf1948 Block Diagram
1.2 Operating Principles  WF1948 block diagram Block ANALOG CH2部 ANALOG CH1部 Block Approx. 230 kS/s 約230kS/s ±1V Waveform MOD/ADD 波形メモリ memory 8Mbit ANALOGCONT. 50kHz Bessel 512Kw 外部変調/ External modulation/ CPLD Vref 10MHz BW SSRAM External addition 外部加算/ switching 切換え PG AMP PG AMP ±10V...
Page 19: Preparations Before Use
2. Preparations before Use Checking Before Use ....................2-2 Installation ....................... 2-4 Grounding and Power Supply Connection .............. 2-5 Calibration ........................ 2-6 WF1947/WF1948...
Page 20: Checking Before Use
This product has high-voltage portions inside. Absolutely never remove its cover. No one except the service technicians certified by NF Electronic Instruments are allowed to check or touch the inside of this equipment. Do not touch the inside by yourself in any case.
Page 21 2.1 Checking Before Use d) Rack mount adapters (optional) Adapters for mounting the equipment on a 19-inch IEC, EIA standard rack, or JIS standard rack. There are four types of adapter in total, adapter for one unit and adapter for two units (for side-by-side mounting) for each product model.
Page 22: Installation
2.2 Installation Installation a) Installation location Do not place the equipment with the rear side down. It may damage the connectors and hinder ventilation. Install the equipment with all the four rubber feet and stands on the level plane such as a desk, so that the equipment will be stationed stable.
Page 23: Grounding And Power Supply Connection
2.3 Grounding and Power Supply Connection For the rack mount adapter handling method, refer to the manual included with the adapter. Following attention should be drawn when you mount the equipment in the rack: • Support this product by all means by installing some supports such as rails on the rack. •...
Page 24: Calibration
2.4 Calibration CAUTION The accessory power supply cable set is designed to be used for this product only. Do not use it for any other product or purposes. Calibration Although somewhat contingent on the usage environment and how often the product is used, conduct the performance test at least once a year.
Page 25: Panels And I/O Terminals
3. Panels and I/O Terminals Panel Component Names and Functions ..............3-2 I/O Terminals ......................3-6 Cautions on Floating Ground Connection ............3-13 WF1947/WF1948...
Page 26: Panel Component Names And Functions
3.1 Panel Component Names and Functions Panel Component Names and Functions This section describes the names and functions of the components on the front panel and rear panel. 3.1.1 Front Panel of WF1947 MODE key Changes the oscillation mode ☞P.4-23, P.4-48, P.4-61, P.4-84 MENU key Basic parameters...
Page 27: Rear Panel Of Wf1947
3.1 Panel Component Names and Functions 3.1.2 Rear Panel of WF1947 Power supply input ☞ P.2-5 Air outlet ☞P.2-4 GPIB connector connector Frequency reference output terminal ☞P.3-12 External 10 MHz frequency reference input terminal ☞P.3-11 Figure 3-2 Rear Panel of WF1947 WF1947/WF1948...
Page 28: Front Panel Of Wf1948
3.1 Panel Component Names and Functions 3.1.3 Front Panel of WF1948 MODE key Basic parameters Changes the Modify knob Allows the waveform, oscillation mode Selects items, or ☞P.4-23, P.4-48, frequency, increases/decreases values amplitude, and DC offset P.4-61, P.4-84 ☞P.4-9 to be changed MENU key Numeric keypad ☞P.4-14...
Page 29: Rear Panel Of Wf1948
3.1 Panel Component Names and Functions 3.1.4 Rear Panel of WF1948 CH2 external trigger input terminal ☞P.3-10 CH1 external trigger input terminal ☞P.3-10 Power supply input ☞P.2-5 Air outlet ☞P.2-4 GPIB connector USB connector Frequency reference output terminal ☞P.3-12 External 10 MHz frequency reference input terminal ☞P.3-11 CH2 external modulation/addition input terminal ☞P.3-9 CH1 external modulation/addition input terminal ☞P.3-9 Figure 3-4 Rear Panel of WF1948...
Page 30: I/O Terminals
3.2 I/O Terminals I/O Terminals WARNING To prevent electric shocks, do not apply a voltage exceeding 42 Vpk (DC + AC peak) between the ground of the BNC connectors insulated from the enclosure and the enclosure. Also, do not apply a voltage exceeding 42 Vpk (DC + AC peak) between the grounds of the BNC connector groups insulated from the enclosure.
Page 31: Waveform Output (Fctn Out)
3.2 I/O Terminals 3.2.1 Waveform Output (FCTN OUT) WF1947 WF1948 CH1 FCTN OUT CH2 FCTN OUT FCTN OUT [Insulated from [Insulated from [Insulated from enclosure] enclosure] enclosure] This is the main output. As a mechanical switch is used to turn the waveform output on or off, chattering may occur when turning the output on/off, and this may cause unintended waveforms to be output.
Page 32: Synchronization/Sub-Output (Sync/Sub Out)
3.2 I/O Terminals 3.2.2 Synchronization/Sub-output (SYNC/SUB OUT) WF1947 WF1948 SYNC/SUB OUT SYNC/SUB OUT SYNC/SUB [Insulated from [Insulated from enclosure] enclosure] [Insulated from enclosure] A synchronization signal is output according to the waveform or oscillation status. This signal can be used as the synchronization signal for oscilloscope. As shown in the following table, the output signal can be selected according to the oscillation mode.
Page 33: External Modulation/Addition Input (Mod/Add In)
3.2 I/O Terminals 3.2.3 External Modulation/Addition Input (MOD/ADD IN) WF1947 WF1948 MOD/ADD IN MOD/ADD IN [Insulated from MOD/ADD IN [Insulated from enclosure] [Insulated from enclosure] enclosure] When the modulation source is external in the modulation mode except FSK and PSK, an external modulation signal is input.
Page 34: External Trigger Input (Trig In)
3.2 I/O Terminals 3.2.4 External Trigger Input (TRIG IN) WF1947 WF1948 CH2 TRIG IN CH1 TRIG IN TRIG IN This terminal can be used as external trigger input in the following cases. The polarity setting can be changed. • Start trigger of single-shot sweep ☞ P.4-68 •...
Page 35: External 10 Mhz Frequency Reference Input (10 Mhz Ref In)
3.2 I/O Terminals 3.2.5 External 10 MHz Frequency Reference Input (10 MHz REF IN) WF1947 WF1948 10MHz REF IN 10MHz REF IN [Insulated from enclosure] [Insulated from enclosure] This terminal can be used for the following purposes.  When frequency accuracy higher than the specification of this product is required, or when you want to use the same frequency reference as a different signal generator Input the 10 MHz reference signal from an external frequency standard or another signal generator.
Page 36: Frequency Reference Output (Ref Out)
Check Do not connect any equipment other than WF1947, WF1948, and the equipment specified by NF Corporation to the frequency reference output. The special signal that is output from this terminal during synchronization may make the operation of such connected equipment unstable.
Page 37: Cautions On Floating Ground Connection
3.3 Cautions on Floating Ground Connection Cautions on Floating Ground Connection The signal ground of the BNC terminals for waveform output, synchronization/sub -output, and external modulation/addition input is shared, but since it is insulated from the enclosure (ground potential), it can be connected to an equipment that has a different potential. Moreover, when the equipment is mounted in a rack, the signal ground is not affected by the potential of the rack .
Page 38: Figure 3-5 Cautions On Floating Ground Connection For Wf1947
3.3 Cautions on Floating Ground Connection  Cautions on floating ground connection for WF1947 Use with potential Use with potential difference of 42 Vpk difference of 42 Vpk or less! or less! Enclosure ground Use with potential difference of 42 Vpk or less! Enclosure ground Figure 3-5 Cautions on Floating Ground Connection for WF1947...
Page 39: Basic Operation
4. Basic Operation Power On/Off and Restoration of Settings .............. 4-2 Screen Configuration and Operation ..............4-6 Basic Settings and Operations ................4-11 Setting Methods for Main Items ................4-23 Using Arbitrary Waveforms .................. 4-44 Setting and Operation of Modulation..............4-45 Setting and Operation of Sweep ................
Page 40: Power On/Off And Restoration Of Settings
4.1 Power On/Off and Restoration of Settings Power On/Off and Restoration of Settings 4.1.1 How to Turn Power On/Off  Power-on operation The start screen is displayed The power is turned on Power off state Press the (standby state) power switch Once the power is turned on, a self diagnosis test is automatically executed, and then the equip ment becomes operable.
Page 41: Restoration Of Settings At Power-On
4.1 Power On/Off and Restoration of Settings 4.1.2 Restoration of Settings at Power-on When the power is turned on/off using the power switch, the settings before the previous power -off are restored when the power is turned on again. The output on/off setting at power on can be set on the Utility screen. ☞ P.4-19 However, if the power supply to the product is directly cut off while the power is on, the settings are set to the contents of the setting memory number 1 when the power supply is resumed.
Page 42 4.1 Power On/Off and Restoration of Settings • The settings before the previous power-off are restored. • The output on/off setting at power on can be changed on the Utility screen. ☞ P.4-19 Check The settings immediately before the power-off can be restored only if the power is turned off using the power switch.
Page 43 4.1 Power On/Off and Restoration of Settings b) Restoration of settings at power supply on/off This is the case when you collectively turn on/off the power supply for this product and other devices which are mounted in a rack. When the power supply is cut off while the power is on, the power is automatically turned on the next time the power supply is resumed.
Page 44: Screen Configuration And Operation
• Uncalibrated status UCAL Displayed when the calibration information of the product is lost due to a problem, and the prescribed performance cannot be maintained. As this indicates a failure, please contact NF Corporation or one of our representatives. • Overheating status TEMP Displayed when the internal temperature of the product is abnormally high.
Page 45 4.2 Screen Configuration and Operation INDEP (independent)/2PHASE (2-phase)/ 2TONE (constant frequency difference)/RATIO (constant frequency ratio)/ DIFF (differential output) For details on the channel mode setting, ☞ P.7-2   Setting area This area is used to display and set the various parameters. When multiple display formats can be selected, the display format switching tabs are displayed on the left side of the screen.
Page 46: Switching Display Format With Tabs (To Display Waveform Graph)
4.2 Screen Configuration and Operation 4.2.2 Switching Display Format with Tabs (To Display Waveform Graph) When multiple display formats can be selected, the display format switching tabs are displayed on the left side of the screen. For example, if the [Graph] tab screen is displayed, you can set the parameters while checking the image of the output waveform.
Page 47 4.2 Screen Configuration and Operation b) To switch the display format The Single tab screen is displayed In the left example, the Single tab screen is displayed. On this screen, the settings are displayed in text format. The Graph tab is Select the Graph tab by using the arrow selected keys or the modify knob.
Page 48: Top Menu
4.2 Screen Configuration and Operation 4.2.3 Top Menu Arbitrary waveform editing, various system settings, saving and recalling settings and others can be done by selecting the desired item from the top menu. a) To display the top menu When you press the MENU key, the menu items are displayed on the soft-keys. The menu items are displayed When you press the soft-key corresponding to a menu item, the setting screen for that menu item appears.
Page 49: Basic Settings And Operations
4.3 Basic Settings and Operations Basic Settings and Operations 4.3.1 To Change Frequency, Amplitude, and Other Values a) To change a value with the up/down arrow keys (or the modify knob) Select the desired item with the arrow keys or the modify knob. In the left example, the [Frequency] field is selected.
Page 50 4.3 Basic Settings and Operations Press the ENTER key to close the input field. The input field has closed If you press the CANCEL key instead of ENTER key, the changed value is discarded and the setting before the change is restored. b) To change a value with the numeric keypad Select the desired item with the arrow keys or the modify knob.
Page 51: To Change Waveforms
4.3 Basic Settings and Operations Check While inputting numeric values, the left arrow key serves as the delete key, and the right arrow key as the zero input key. Check If a setting item is displayed on a soft-key, you can open the input field for that item by pressing that soft-key.
Page 52: Shortcut Keys For Changing Basic Parameters
4.3 Basic Settings and Operations 4.3.3 Shortcut Keys for Changing Basic Parameters The selection list or input field for frequency, amplitude, and DC offset can be immediately opened by using the corresponding basic parameter shortcut key.  Frequency The frequency input field is opened ...
Page 53: Functions Of Enter/Cancel/Undo Key
4.3 Basic Settings and Operations 4.3.4 Functions of ENTER/CANCEL/UNDO Key  Functions of ENTER key The ENTER key can be used to perform the following actions. •Open the input field or selection list for the selected item. •Set the value input from the numeric keypad. •Perform the function of the button displayed on the screen.
Page 54: To Change Display Unit
4.3 Basic Settings and Operations 4.3.5 To Change Display Unit a) To change the prefix (unit prefix: k, m, M, etc.) Frequency is used as an example here. For amplitude and pulse width, you can use a similar way. Select frequency and then press the ENTER key to open the input field.
Page 55 4.3 Basic Settings and Operations b) To change Vp-p, Vrms, user-defined unit, etc. Amplitude is used as an example here. For frequency and pulse width, you can use a similar way. Select amplitude and then press the ENTER key to open the input field. Press the [Unit] soft-key to move the cursor to "Vp-p".
Page 56: Ch1/Ch2 Switching Key And Active Channel (Wf1948 Only)
4.3 Basic Settings and Operations 4.3.6 CH1/CH2 Switching Key and Active Channel (WF1948 Only) Each time the CH1/CH2 switching key is pressed, the channel to be set is switched. This key is disabled on the setting screens that are not dependent on the channel.
Page 57: Operations Available On Utility Screen
4.3 Basic Settings and Operations 4.3.7 Operations Available on Utility Screen a) To display the Utility screen When you press the MENU key, the top menu is displayed in the soft-key area. In this area, press the soft-key corresponding to [UTILITY].
Page 58 4.3 Basic Settings and Operations •Phase synchronization [φSync] Performs the inter-unit synchronization during the synchronous connection of multiple units and the inter-channel synchronization in WF1948. ☞ P.7-6, P.8-4 •User-defined unit setting [User Unit] Set the user-defined units. ☞ P.10-3 •Remote setting [Remote] Select GPIB/USB and sets the GPIB address.
Page 59: To Restore Initial Settings
4.3 Basic Settings and Operations 4.3.8 To Restore Initial Settings The initial settings can be restored on the Utility screen. The initial settings are continuous oscillation, sine wave, 1 kHz, 0.1 Vp-p/open, and output off. For the list of the initial settings, ☞ P.14-1. When you press the MENU key, the top menu is displayed in the soft-key area.
Page 60 4.3 Basic Settings and Operations • Off [Off] The output is off. • On [On] The output is on. • Returns to previous setting [Last State] The behavior differs as follows according to how the power is turned off the last time. If the power was turned off the last time with the power switch on the panel ...
Page 61: Setting Methods For Main Items
4.4 Setting Methods for Main Items Setting Methods for Main Items This section describes how to set the main items that are set in the Oscillator system setting window. When you press the MENU key while another screen is displayed, the Top menu is displayed. Select [OSC].
Page 62: To Set Waveforms
4.4 Setting Methods for Main Items 4.4.3 To Set Waveforms When you press the FCTN key, the [Waveform] icon is displayed on numeric keypad. Pressing the numeric key corresponding to the desired waveform sets the waveform. The correspondence of each numeric key and the waveform is shown below: [1] Key: Sine wave [SINE] [2] Key: Square wave [SQUARE]...
Page 63: To Set Period
4.4 Setting Methods for Main Items 4.4.5 To Set Period Settings can be performed using the period instead of the frequency. The following two methods are available to change from the frequency display to the period display:  Use the soft-key [Freq]/[Period] to change to the period display The input field of Frequency opens.
Page 64 4.4 Setting Methods for Main Items b) Items changed in the phase setting The following items can be changed in the phase setting.  The phase difference between phase sync output of Sync/Sub terminal and waveform output can be changed. The following figure shows the example of the phase setting of +90 degree.
Page 65 4.4 Setting Methods for Main Items  The phase difference between channels can be changed in synchronous oscillation and 2 phase oscillation (WF1948 only) The difference between the phase setting of each channel is the phase difference between the channels. When [Phase setting of CH2 - Phase setting of CH1] is positive, the waveform of CH2 precedes the waveform of CH1 as shown in the following figure.
Page 66: To Set Amplitude
4.4 Setting Methods for Main Items 4.4.7 To Set Amplitude a) Setting procedure Press the shortcut-key AMPTD to open the amplitude input field. Or select the [Amplitude] field and then press the ENTER key to open the amplitude input field. Input field If there are two or more system amplitude...
Page 67 4.4 Setting Methods for Main Items d) Restriction on AC + DC The maximum value of total of AC amplitude and DC offset is restricted to ±10V/open. For example, when the AC amplitude is 5Vp-p/open, DC offset is restricted to the range from -7.5V/open to +7.5V/open.
Page 68: To Set Dc Offset
4.4 Setting Methods for Main Items 4.4.8 To Set DC Offset Press the shortcut-key OFFSET to a) Setting procedure open the DC offset input field. Or select the [Offset] field and then press the ENTER key to open the DC offset input field.
Page 69: To Set Output Level With High/Low Level
4.4 Setting Methods for Main Items 4.4.9 To Set Output Level with High/Low Level The output level can be set with the top end value (high level) and the bottom end value (low level) of a waveform instead of amplitude and DC offset. a) To change Amplitude/DC offset display to High/Low display There are the following three methods to change the amplitude/DC offset display to high/low display:...
Page 70: To Set Waveform Polarity And Amplitude Range
4.4 Setting Methods for Main Items 4.4.10 To Set Waveform Polarity and Amplitude Range a) Setting procedure Select the [Polarity] field and then press the Enter key to open the selection list in the soft-key area. Select the desired polarity and amplitude range from the selection list.
Page 71 4.4 Setting Methods for Main Items c) How to determine amplitude range Pay attention how the waveform changes as the amplitude is changed, and decide the amplitude range. By default, a waveform that swings to both polarities is set as ±FS, a waveform with single polarity is set as 0/+FS.
Page 72: How To Use Auto Range/Range Hold For Output Voltage
4.4 Setting Methods for Main Items 4.4.11 How to Use Auto Range/Range Hold for Output Voltage Auto-range is selected by default. The best range is automatically selected according to the amplitude and DC offset (including high/low level settings) settings. When the range is changed, a transitional voltage is generated.
Page 73: To Set Load Impedance
4.4 Setting Methods for Main Items 4.4.12 To Set Load Impedance By matching the setting value of the load impedance to an actual loading condition, the amplitude and the DC offset (including the setting according to high level and low level) can be set with the voltage that appears to the load end.
Page 74: To Add External Signal
4.4 Setting Methods for Main Items 4.4.13 To Add External Signal It is possible to output by adding an external signal to a waveform output of this product. a) To Connect addition signal Connect an addition signal to the external modulation/addition input (MOD/ADD IN) BNC terminal on the front panel of WF1947 or on the rear panel of WF1948.
Page 75 4.4 Setting Methods for Main Items External addition setting window is opened The external addition setting window opens. Select the item and then press the ENTER key. The selection list of the external addition conditions is opened, so select the desired condition and then Set the external addition press the ENTER key.
Page 76: To Set Duty Of Square Wave
4.4 Setting Methods for Main Items 4.4.14 To Set Duty of Square Wave The waveform is assumed to be set as square wave [Square]. For how to set the waveform, ☞ P.4-13. The setting unit for duty is % only, and it is not possible to set or display with time. a) How to set duty When the [Duty] field is selected and the ENTER key is pressed, the input...
Page 77 4.4 Setting Methods for Main Items c) Difference between standard and enhanced duty variable range Variable range Features Standard Setting range: 0.0100% ~ 99.9900% • Duty can be changed within the range where jitter is low and a pulse does not disappear. •...
Page 78: To Set Pulse Width And Leading/Trailing Time Of Pulse Wave
4.4 Setting Methods for Main Items 4.4.15 To Set Pulse Width and Leading/Trailing Time of Pulse Wave The waveform is assumed to be set as pulse wave [Pulse]. For how to set the waveform, ☞ P.4-13. The pulse width can be set with either time or duty. The Leading time and the Trailing time can be set with time only.
Page 79 4.4 Setting Methods for Main Items  Pulse width duty → Pulse width time The input field of pulse width duty opens. When the current pulse width duty is displayed, the soft-key [Width] is displayed. Press the key opens the input field of Pulse width time, and the display changes from [Duty] to [Width].
Page 80 4.4 Setting Methods for Main Items and frequency as shown below. If the following restriction is not filled by setting the frequency or the pulse width, the Leading and Trailing times are first adjusted, and then the pulse width are adjusted. ...
Page 81: To Set Ramp Wave Symmetry
4.4 Setting Methods for Main Items 4.4.16 To Set Ramp Wave Symmetry The waveform is assumed to be set as ramp wave [Ramp]. For how to set the waveform, ☞ P.4-13. The setting unit for symmetry is % only, and it is not possible to set or display with time. a) Setting Method of Symmetry When the [Symm] field is selected and the ENTER key is pressed, the input field of...
Page 82: Using Arbitrary Waveforms
4.5 Using Arbitrary Waveforms Using Arbitrary Waveforms a) To output an arbitrary waveform Press the [8] Press the FCTN key to display a waveform key of the on the numeric keypad, and then press the numeric key ([8] key) corresponding to an arbitrary keypad to set an arbitrary waveform (ARB).
Page 83: Setting And Operation Of Modulation
4.6 Setting and Operation of Modulation Setting and Operation of Modulation 4.6.1 Modulation Types The following 8 types of modulations are available. • FM: Frequency Modulation ☞ P.4-51 • FSK: Frequency Shift Keying Binary frequency deviation modulation. ☞ P.4-52 • PM: Phase Modulation ☞ P.4-53 •...
Page 84: Screen For Setting And Operation Of Modulation
4.6 Setting and Operation of Modulation 4.6.2 Screen for Setting and Operation of Modulation This section describes the common screen structure in the modulation oscillation mode. Settings and operations are performed in the settings and operations are performed in the Oscillator setting screen.
Page 85 4.6 Setting and Operation of Modulation Internal modulation frequency [ModFreq] The frequency of the internal modulation source. ☞ P.4-48 Sync output [SyncOut] The output signal from a sync/sub-output terminal. Select from waveform reference phase sync signal, internal modulation sync signal, and internal modulation waveform. ☞ P.4-49 WF1947/WF1948 4-47...
Page 86: Common Setting And Operation Of Modulation
4.6 Setting and Operation of Modulation 4.6.3 Common Setting and Operation of Modulation This section describes the common settings and operations regardless of the type s of modulation all together. a) To modulate oscillation mode  Oscillation mode setting Press the MODE key, and then select [MODU] by using the soft-key to light "MODU"...
Page 87 4.6 Setting and Operation of Modulation [Size] field have original wave size of 4096 points or higher. On the other hand, arbitrary wave where [Point] is displayed in the [Type] field are in control point format. In arbitrary waves in this format, the entire wave is developed with 4096 points so that the feature of the waveform may remain as much as possible.
Page 88 4.6 Setting and Operation of Modulation of the internal modulation waveform. When the internal modulation waveform is a noise, it is fixed to the low level. When a signal under modulation is observed with the oscilloscope etc., it can be used as a trigger signal of the oscilloscope.
Page 89: Setting Fm
4.6 Setting and Operation of Modulation 4.6.4 Setting FM The output frequency changes according to the instantaneous value of modulation signal. For the modulation setting screen and the common operation method, P.4-46, P.4-48 a) Example of FM When the modulating signal swings to a positive side, the frequency shift of the output signal increases.
Page 90: Setting Fsk
4.6 Setting and Operation of Modulation 4.6.5 Setting FSK A binary frequency deviation modulation that output frequency is switched between the carrier frequency and the hop frequency according to the modulating signal. For the modulation setting screen and the common operation method, P.4-46, P.4-48 a) Example of FSK The phase continuity of output signals is maintained though the frequency changes abruptly.
Page 91: Setting Pm
4.6 Setting and Operation of Modulation 4.6.6 Setting PM The output phase changes according to the instantaneous value of modulation signal. For the modulation setting screen and the common operation method, P.4-46, P.4-48 a) Example of PM When the modulating signal swings to a positive side, the phase shift of the output signal increases.
Page 92: Setting Psk
4.6 Setting and Operation of Modulation 4.6.7 Setting PSK A binary frequency deviation modulation that the output phase offsets according to the modulation signal. For the modulation setting screen and the common operation method, P.4-46, P.4-48 a) Example of PSK Because the phase changes abruptly, the output signal waveform is discontinuous.
Page 93: Setting Am
4.6 Setting and Operation of Modulation 4.6.8 Setting AM The output amplitude changes according to the instantaneous value of modulation signal. For the modulation setting screen and the common operation method, P.4-46, P.4-48 a) Example of AM When the modulating signal swings to a positive side, the amplitude of the output signal increases.
Page 94 4.6 Setting and Operation of Modulation enter the modulating signal to external modulation/addition input terminal. It is at the specified modulation depth when ±1V is entered. WF1947/WF1948 4-56...
Page 95: Setting Am (Dsb-Sc)
4.6 Setting and Operation of Modulation 4.6.9 Setting AM (DSB-SC) The output amplitude changes according to the instantaneous value of modulation signal. AM without carrier frequency element. DSB-SC is abbreviation of Double Side Band - Suppressed Carrier. For the modulation setting screen and the common operation method, P.4-46, P.4-48 a) AM (DSB-SC) example The amplitude of output signal increases when the absolute value of the amplitude of modulation signal is large.
Page 96 4.6 Setting and Operation of Modulation and modulation frequency [ModFreq]. When the modulation source [Source] is external [Ext], enter the modulating signal to external modulation/addition input terminal. It is at the specified modulation depth when ±1V is entered. WF1947/WF1948 4-58...
Page 97: Setting Dc Offset Modulation
4.6 Setting and Operation of Modulation 4.6.10 Setting DC Offset Modulation The DC offset changes according to the instantaneous value of modulation signal. For the modulation setting screen and the common operation method, P.4-46, P.4-48 a) DC offset modulation example When the modulating signal swings to a positive side, the DC offset of the output signal increases.
Page 98: Setting Pwm
4.6 Setting and Operation of Modulation 4.6.11 Setting PWM The duty of the square wave and the pulse wave is changed depending on instantaneous value of the modulation signal. For the modulation setting screen and the common operation method, P.4-46, P.4-48 a) Example of PWM When the modulating signal swings to a positive side, the duty of the output signal increases.
Page 99: Setting And Operation Of Sweep
4.7 Setting and Operation of Sweep Setting and Operation of Sweep 4.7.1 Sweep Types Sweep can be done for the following five types of items: • Frequency sweep, ☞ P.4-73 • Phase sweep ☞ P.4-75 • Amplitude sweep ☞ P.4-77 •...
Page 100 4.7 Setting and Operation of Sweep c) Second page of the setting screen: Screen for setting the sweep (1) The following figure is the example of selecting frequency as a sweep type. Indicates that the second page is displayed Sweep type Start value of sweep Sweep stop value Sweep time...
Page 101 4.7 Setting and Operation of Sweep d) Third page of the setting screen: Screen for setting the sweep (2) The following figure is the example of selecting frequency as a sweep type. Indicates that the third page is displayed Stop level of the gated single-shot sweep Oscillation stop unit of the gated sweep...
Page 102: Common Setting And Operation Of Sweep
4.7 Setting and Operation of Sweep 4.7.3 Common Setting and Operation of Sweep This section describes the common settings and operations regardless of the items to sweep all together. a) To sweep oscillation mode  Oscillation mode setting Press the MODE key, and then select [SWEEP] by using the soft-key to light "SWEEP"...
Page 103 4.7 Setting and Operation of Sweep e) To sweep as sawtooth wave  In one-way sweep Set the sweep function [SwpFctn] on the second page of the setting screen as One -way [OneWay]. For frequency sweep, linear [Lin.OneW] or log [Log.OneW] is available for the slope. One-way sweep Sweep value f) To sweep as triangular waveform ...
Page 104 4.7 Setting and Operation of Sweep Continuous one-way sweep Stop value Sweep value Start value Sweep time Frequency sweep example Continuous shuttle sweep Stop value Sweep value Start value Sweep time Sweep time Frequency sweep example To start sweep synchronizing with trigger  In single-shot sweep Set the sweep mode [SwpMode] on the second page of the setting screen as single -shot [Single] .
Page 105 4.7 Setting and Operation of Sweep Single-shot shuttle sweep Trigger Stop value Sweep value Start value Sweep time Sweep time Frequency sweep example To output waveform only when sweep running  In gated single-shot sweep Set the sweep mode [SwpMode] on the second page of the setting screen as gated single -shot [Gated].
Page 106 4.7 Setting and Operation of Sweep Gated single-shot shuttle sweep Trigger Stop value Sweep value Start value Sweep time Sweep time Frequency sweep example Check In phase sweep, the start phase setting is the oscillation starting phase, and the stop phase setting is the oscillation stop phase. k) To set trigger condition of single-shot sweep and gated single-shot sweep Internal trigger oscillator, external signal, manual trigger operation, and remote trig ger can be used as a trigger.
Page 107 4.7 Setting and Operation of Sweep To start sweep  With the soft-key [start] or trigger In continuous sweep, sweep oscillation mode starts automatically the sweep process. However, if the sweep setting is not appropriate, the sweep oscillation does not start ([Conflict] is displayed at the top center of the screen).
Page 108 4.7 Setting and Operation of Sweep o) To output sweep starting value  With the soft-key [SttState] When the soft-key [SttState] is pressed, it enters into the status to output the sweep starting value. You can check the status of tested equipment with sweep starting value. The soft-key [SttState] is displayed in the status to output the sweep starting value or stop value.
Page 109 4.7 Setting and Operation of Sweep  When [SwpSync+Mkr] is selected, The rising of sweep sync output is a marker signal. The sweep sync output is low until it reaches the marker value from the sweep starting value. A sync output does not change in the outward of shuttle sweep.
Page 110 4.7 Setting and Operation of Sweep Continuous sweep One way Shuttle Stop value Stop value Marker value Marker value Sweep value Start value Start value Low during Sweep sync the 1st half Low from of interval signal SwpSync start value from start (marker to stop...
Page 111: Setting Frequency Sweep
4.7 Setting and Operation of Sweep 4.7.4 Setting Frequency Sweep For the sweep setting screen and the common operation method, P.4-61, P.4-64 a) Frequency sweep example Examples of a continuous sweep and linear shuttle. Shuttle sweep Stop value Sweep value Start value Sweep time Sweep time...
Page 112 4.7 Setting and Operation of Sweep It is possible to set with center frequency [Center], and span frequency [Span], instead of start frequency, and stop frequency.☞ P.4-64 When sweep mode is single-shot or gated single-shot, it is necessary to set the trigger condition [Trig].☞...
Page 113: Setting Phase Sweep
4.7 Setting and Operation of Sweep 4.7.5 Setting Phase Sweep For the sweep setting screen and the common operation method, P.4-61, P.4-64 a) Phase sweep example Examples of a continuous sweep and linear shuttle. Shuttle sweep Stop value Sweep value Start value Sweep time Sweep time...
Page 114 4.7 Setting and Operation of Sweep • Sweep Mode [SwpMode] Select from continuous, single-shot, or gated single-shot.☞ P.4-65 • Sweep function [SwpFctn] Select from one-way/shuttle.☞ P.4-65 It is possible to set with center phase [Center], and span phase [Span], instead of start phase, and stop phase.☞...
Page 115: Setting Amplitude Sweep
4.7 Setting and Operation of Sweep 4.7.6 Setting Amplitude Sweep For the sweep setting screen and the common operation method, P.4-61, P.4-64 a) Amplitude sweep example Examples of a continuous sweep and linear shuttle. Shuttle sweep Stop value Sweep value Start value Sweep time Sweep time...
Page 116 4.7 Setting and Operation of Sweep Set the following items as needed: • Marker amplitude[Marker] (the second page of the setting screen) ☞P.4-70 • Stop level [StpLvl] (the third page of the setting screen) ☞P.4-67 The setting used for gated single-shot sweep only. •...
Page 117: Setting Dc Offset Sweep
4.7 Setting and Operation of Sweep 4.7.7 Setting DC Offset Sweep For the sweep setting screen and the common operation method, P.4-61, P.4-64 a) DC offset sweep example Examples of a continuous sweep and linear shuttle. Shuttle sweep Stop value Sweep value Start value Sweep time...
Page 118 4.7 Setting and Operation of Sweep When sweep mode is single-shot or gated single-shot, it is necessary to set the trigger condition [Trig].☞ P.4-68 Set the following items as needed: • Marker DC offset[Marker] (the second page of the setting screen) ☞P.4-70 •...
Page 119: Setting Duty Sweep
4.7 Setting and Operation of Sweep 4.7.8 Setting Duty Sweep For the sweep setting screen and the common operation method, P.4-61, P.4-64 a) Duty sweep example Examples of a continuous sweep and linear shuttle. Shuttle sweep Stop value Sweep value Start value Sweep time Sweep time...
Page 120 4.7 Setting and Operation of Sweep It is possible to set with center duty [Center] and span duty [Span], instead of start duty and stop duty.☞ P.4-64 When sweep mode is single-shot or gated single-shot, it is necessary to set the trigger condition [Trig].☞...
Page 121: Setting And Operation Of Burst
4.8 Setting and Operation of Burst Setting and Operation of Burst 4.8.1 Burst Oscillation Types The following 4 types of burst oscillations are available. • Auto Burst Repeat oscillation and stop automatically at the specified by wave number respectively. A trigger signal is not necessary.☞...
Page 122: Auto Burst
4.8 Setting and Operation of Burst 4.8.2 Auto Burst Repeat oscillation and pause automatically at the specified by wave number respectively. A trigger signal is not necessary. Settings and operations are performed in the Oscillator setting screen. When you press the MENU key while another screen is displayed, the Top menu is displayed.
Page 123 4.8 Setting and Operation of Burst Indicates that the second page is displayed  Second page: Screen for auto burst setting Set the burst mode to [Auto] Mark wave number Space wave number Pressing the NEXT key Stop level switches the display to the Sync output first page.
Page 124 4.8 Setting and Operation of Burst g) To stop auto burst  Cannot Oscillation cannot be stopped while in auto burst mode. To stop oscillation, set the burst mode [BrstMode] as other than auto [Auto] on the second page of the setting screen to prevent a trigger or gate signal from arriving. To set as continues oscillation, change the oscillation mode to [CONT].
Page 125: Trigger Burst
4.8 Setting and Operation of Burst 4.8.3 Trigger burst Every time a trigger is accepted, perform oscillation with the specified wave number. Settings and operations are performed in the OSC setting screen. When you press the MENU key while another screen is displayed, the Top menu is displayed. Press the [OSC] soft-key. a) Trigger burst example Mark wave number (oscillation wave number): 4 waves, oscillation start/stop phase: 30 degree, stop level: Off.
Page 126 4.8 Setting and Operation of Burst c) Screen for trigger burst setting  First page: Screen for basic parameter setting These are common items independent from oscillation mode. Indicates that the first page is displayed Setting of oscillation Pressing the NEXT key start/stop phase switches the display to the second page.
Page 127 4.8 Setting and Operation of Burst e) Setting items necessary for trigger burst Set the oscillation start/stop phase [Phase] on the first page of the setting screen. Set mark wave number [Mark] on the second page of the setting screen. Usually set as integer value.
Page 128 4.8 Setting and Operation of Burst h) To output burst sync signal  In sync output setting Set in the sync output [SyncOut] on the second page of the setting screen. Select from the following two options: • Signal that synchronizes with reference phase of waveform [Sync] •...
Page 129 4.8 Setting and Operation of Burst When you the stop level is applied to the square wave, a square wave with three values can be output as shown in the following figure. In the example of the figure, the stop level is set as 0%, oscillation start/stop phase are set as 0°(both the standard and enhanced duty variable ranges are available).
Page 130: Gate Oscillation
4.8 Setting and Operation of Burst 4.8.4 Gate Oscillation While the gate is On, performs oscillation with integer half-cycle or half-cycle unit. Settings and operations are performed in the Oscillator setting screen. When you press the MENU key while another screen is displayed, the Top menu is displayed. Press the [OSC] soft-key. a) Gate oscillation example Oscillation start/stop phase: 30 degree, oscillation stop unit: 1 cycle, stop level: Off.
Page 131 4.8 Setting and Operation of Burst The phase to start/stop oscillation.  Second page: Screen for gate oscillation setting Indicates that the second page is displayed Set the burst mode to [Gate] Stop level Trigger Pressing the NEXT key Oscillation stop unit switches the display to the Synchronization output...
Page 132 4.8 Setting and Operation of Burst Trigger source setting A trigger source can be selected from internal [Int] or external [Ext]. When a trigger source is internal [Int], a trigger period can be set. At this time, the gate signal is square waves with duty 50%.
Page 133 4.8 Setting and Operation of Burst To oscillate in half cycle  Oscillation stop unit as half cycle When you want to stop oscillation every half cycle, set the oscillation stop unit [OscStop] as half cycle [HalfCycle] on the second page of the setting screen. Usually, set to 1 cycle [Cycle]. When it is set as 1 cycle [Cycle], it is oscillation with integer cycle.
Page 134 4.8 Setting and Operation of Burst k) Noise gate oscillation Because noise has no cycle, the gate On zone is the oscillation zone directly, and the gate Off zone is the oscillation zone directly. In addition, because noise has no phase, a stop level set ting is always effective.
Page 135: Triggered Gate Oscillation
4.8 Setting and Operation of Burst 4.8.5 Triggered Gate Oscillation Gate oscillation that turns the gate On/Off every time a trigger is accepted. Settings and operations are performed in the Oscillator setting screen. When you press the MENU key while another screen is displayed, the Top menu is displayed. Press the [OSC] soft -key. a) Triggered gate oscillation example Oscillation start/stop phase: 30 degree, oscillation stop unit: 1 cycle, stop level: Off.
Page 136 4.8 Setting and Operation of Burst c) Screen for triggered gate oscillation setting  First page: Screen for basic parameter setting These are common items independent from oscillation mode. Indicates that the first page is displayed Setting of oscillation Pressing the NEXT key start/stop phase switches the display to the second page.
Page 137 4.8 Setting and Operation of Burst e) Setting items necessary for triggered gate oscillation Set the oscillation start/stop phase [Phase] on the first page of the setting screen. The stop level [StpLvl] on the second page of the setting screen is usually set as Off [Off]. ☞...
Page 138 4.8 Setting and Operation of Burst •Signal that synchronizes with burst oscillation [BrstSync]  When [Sync] is selected, Signals with TTL level that are rising at the reference phase of waveform are output from the SYNC/SUB OUT terminal.  When [BrstSync] is selected, Signals with TTL level that synchronize with the gate oscillation are output from the SYNC/SUB OUT terminal.
Page 139: Saving And Recalling Settings
5. Saving and Recalling Settings Procedure to Save Settings ..................5-2 Procedure to Recall Settings ..................5-3 Restoring Saved Contents to Initial Settings ............5-4 Changing Setting Memory Name ................5-4 WF1947/WF1948...
Page 140: Procedure To Save Settings
5.1 Procedure to Save Settings You can save the current setting condition in the setting memory, and recall it to use later. You can make operations to save the setting and recall it in the Memory screen. The setting memory 1 is used to startup after power failure. ☞ P.4-5 Factory defaults are saved in all the setting memories at factory shipment.
Page 141: Procedure To Recall Settings
5.2 Procedure to Recall Settings Procedure to Recall Settings When you press the MENU key, the top menu is displayed in the soft-key area. Then, press the [MEMORY] soft-key. This opens the Memory screen. In the Recall Memory screen, select [Memory No.] field on the top right of the screen, and then press the ENTER key to open the input field of the setting memory...
Page 142: Restoring Saved Contents To Initial Settings
5.3 Restoring Saved Contents to Initial Settings Restoring Saved Contents to Initial Settings Press the [Clear] As with the save operation, after soft-key to open the setting the setting memory number, dialog box to confirm press the [Clear] soft-key. The dialog the initialization operation.
Page 143: Creating Arbitrary Waveforms
Creating Arbitrary Waveforms Basics ........................6-2 Display Procedure and Overview of Screen for Creating/Editing Arbitrary Waveforms ........................... 6-4 Creating New Arbitrary Waveform ................. 6-6 Simple Arbitrary Waveform Creating Example ............. 6-7 Outputting Created Arbitrary Waveform ............... 6-8 Saving Created Arbitrary Waveform ..............6-8 Identifying Memory Space Required for Saving Arbitrary Waveforms ....
Page 144: Basics
6.1 Basics Basics There are the following two types of methods to create arbitrary waveforms: • Use the accompanying arbitrary waveform editing software to create arbitrary waveforms on a P C. • Enter waveform data on a panel. This section describes the method to create arbitrary waveforms using operations on the panel of the main unit.
Page 145 6.1 Basics the number of control points between 2 and 10,000 points. When you create/edit an arbitrary waveform on the panel, you operate data on this edit memory. Only one waveform can be treated on the edit memory.  Selection of arbitrary waveforms to be output If you select an arbitrary waveform as an output waveform in the Oscillator setting screen, you c an select an output wave of all the saved arbitrary waveforms.
Page 146: Display Procedure And Overview Of Screen For Creating/Editing Arbitrary Waveforms
6.2 Display Procedure and Overview of Screen for Creating/Editing Arbitrary Waveforms Display Procedure and Overview of Screen for Creating/Editing Arbitrary Waveforms An arbitrary waveform is created/edited in the ARB Edit screen. Press the MEMU key to show the Select [ARB soft-keys at the bottom of the screen.
Page 147 6.2 Display Procedure and Overview of Screen for Creating/Editing Arbitrary Waveforms  Graph display For the graph display, a waveform in process of creation is enlarged. X and Y values of the selected one control point are displayed. As with the list display, a shape of waveform is created by setting X and Y values for each control point.
Page 148: Creating New Arbitrary Waveform
6.3 Creating New Arbitrary Waveform Creating New Arbitrary Waveform There are the following three types of methods to newly create an arbitrary waveform: • Create a new arbitrary waveform thoroughly First, press the [New] soft-key to clear the edit memory. Then, enter control points. The next section describes the example of creation.
Page 149: Simple Arbitrary Waveform Creating Example
6.4 Simple Arbitrary Waveform Creating Example Simple Arbitrary Waveform Creating Example This section creates a simple arbitrary waveform actually. Use the list display to explain the example. Arbitrary waveform to create is a triangular wave as shown below. The number of control points of this waveform are three points, but in this section, it begins with two points and then changes to three points on the way.
Page 150: Outputting Created Arbitrary Waveform
6.5 Outputting Created Arbitrary Waveform Outputting Created Arbitrary Waveform Select the [Apply] button (by CH for WF1948) on the screen, and then press the ENTER key. The setting of output waveform is changed to the arbitrary waveform on the edit memory, and a waveform in process of creation appears in the output.
Page 151: Identifying Memory Space Required For Saving Arbitrary Waveforms
6.7 Identifying Memory Space Required for Saving Arbitrary Waveforms Identifying Memory Space Required for Saving Arbitrary Waveforms The non-volatile memory can save arbitrary waveforms up to 128-waveform or 4 M-word (8192 K-byte). The memory capacity (K-byte) required when saving an arbitrary waveform in the array format and control point format, respectively is calculated by the following formula: Array format: (2 x waveform length (word) + 768) / 1024 (rounding up the fractional part) Control point format: (8 x the number of control points + 768) / 1024 (rounding up the fractional...
Page 152 6.7 Identifying Memory Space Required for Saving Arbitrary Waveforms MEMO WF1947/WF1948 6-10...
Page 153: Convenient Use Of 2-Channel Equipment (Wf1948 Only)
Convenient Use of 2-channel Equipment (WF1948 Only) Overview ........................7-2 Copying Setting between Channels................. 7-3 Unifying Settings of 2 Channels................7-5 Phase Synchronization between Channels ............. 7-6 Maintaining Both Channels to Same Frequency (2-Channel Coordination, 2-Phase) ..........................7-7 Keeping Frequency Difference Constant (2-Channel Coordination, 2-Tone) ..7-9 Keeping Frequency Ratio Constant (2-Channel Coordination, Ratio) ....
Page 154: Overview
7.1 Overview Overview You can use 2-channel equipment, WF1948, not only as the two independent oscillators but also as the 2-channel coordination setting and operation. Functions specific to 2-channel equipment are as follows: • Parameter copy function One's channel setting can be copied to another's channel setting. Channel settings can be changed each other.☞...
Page 155: Copying Setting Between Channels
7.2 Copying Setting between Channels Copying Setting between Channels Copying the settings between channels can be done on the Utility screen. Select [Parameter Copy] on the Utility In the Utility screen, select screen, and then press the ENTER [Parameter key. Copy], and then press the ENTER key...
Page 156 7.2 Copying Setting between Channels When the above setting is completed, select [OK] at the bottom of the window, and then press the ENTER key. The copy operation is performed. When you do not want to copy, select [Cancel] at the bottom of the window and press the ENTER key, or press the CANCEL key.
Page 157: Unifying Settings Of 2 Channels
7.3 Unifying Settings of 2 Channels Unifying Settings of 2 Channels Procedure and operation First, set the 2-channel equivalence setting function to on in the Utility screen. Next, set items to which you want to set the same setting. When you set setting for one channel, the same settings are set to the same items for another channel.
Page 158: Phase Synchronization Between Channels
7.4 Phase Synchronization between Channels Phase Synchronization between Channels Even if you set the frequency and phase to the same values using the 2-channel equivalence setting function, the phase relationship between the output waveforms from the 2 channels is changed accordingly.
Page 159: Maintaining Both Channels To Same Frequency (2-Channel Coordination, 2-Phase)
7.5 Maintaining Both Channels to Same Frequency (2-Channel Coordination, 2-Phase) Maintaining Both Channels to Same Frequency (2-Channel Coordination, 2-Phase) If the channel mode is [2Phase], you can change the frequency with the frequencies for both channels kept the same value while the synchronization relationship is kept. In coordination with the change of frequency of the channel 1, the frequency of the channel 2 is automatically changed.
Page 160 7.5 Maintaining Both Channels to Same Frequency (2-Channel Coordination, 2-Phase)  Operational restrictions There are restrictions shown in the following table to keep the synchronization relationship and the same frequency: Item Restriction Waveform Disabled for noise and DC. Modulated Both CHs are FM. Peak deviation is common. oscillation Modulation source is internal only.
Page 161: Keeping Frequency Difference Constant (2-Channel Coordination, 2-Tone)
7.6 Keeping Frequency Difference Constant (2-Channel Coordination, 2-Tone) Keeping Frequency Difference Constant (2-Channel Coordination, 2-Tone) If the channel mode is [2Tone], you can change the frequency with the frequency difference between both channels kept constant. In coordination with the change of frequency of the channel 1, the frequency of the channel 2 is automatically changed.
Page 162 7.6 Keeping Frequency Difference Constant (2-Channel Coordination, 2-Tone)  Operational restrictions There are restrictions shown in the following table to keep the frequency difference: Item Restriction Waveform Disabled for noise and DC Modulated Both CHs are FM. Peak deviation is common. oscillation Modulation source is internal only.
Page 163: Keeping Frequency Ratio Constant (2-Channel Coordination, Ratio)
7.7 Keeping Frequency Ratio Constant (2-Channel Coordination, Ratio) Keeping Frequency Ratio Constant (2-Channel Coordination, Ratio) If the channel mode is [Ratio], you can change the frequency with the frequency ratio betw een both channels kept constant. In coordination with the change of frequency of the channel 1, the frequency of the channel 2 is automatically changed.
Page 164 7.7 Keeping Frequency Ratio Constant (2-Channel Coordination, Ratio)  Operational restrictions There are restrictions shown in the following table to keep the frequency ratio: Item Restriction Waveform Disabled for noise and DC Modulated Both CHs are FM. Peak deviation follows the frequency ratio. oscillation Modulation source is internal only.
Page 165: Obtaining Differential Output (2-Channel Coordination, Differential)
7.8 Obtaining Differential Output (2-Channel Coordination, Differential) Obtaining Differential Output (2-Channel Coordination, Differential) If the channel mode is [Diff], you can change the setting with the differential output of both channels being kept. In coordination with the change of setting of the channel 1, the setting of the channel 2 is automatically changed.
Page 166 7.8 Obtaining Differential Output (2-Channel Coordination, Differential) MEMO WF1947/WF1948 7-14...
Page 167: Synchronizing Multiple Units
Synchronizing Multiple Units Connection Procedure ....................8-2 Performing Synchronization ..................8-4 WF1947/WF1948...
Page 168: Connection Procedure
8.1 Connection Procedure Synchronizing multiple units of WF1947 or WF1948 can configure up to 12 -phase oscillators (for 6 units of WF1948). You can change a phase and amplitude for each phase independently. Set the same frequency for all units and channels. Connection Procedure WF1947 or WF1948 as the synchronous reference is called a "master unit."...
Page 169 8.1 Connection Procedure ･ Connection method 2 Connect the reference output for the master unit or slave unit to the reference input for the next slave unit. Time difference between slave units varies depending on the delay within units (approximately 25 ns) and connection cable length (approximately 6 ns/m).
Page 170: Performing Synchronization
8.2 Performing Synchronization Performing Synchronization  Before synchronization After connection among the master unit and slave units is finished, perform the setting as follows: Set [Channel Mode] to [Indep] or [2Phase] Set 10MHz Ref Out Master units (WF1948 only) to [Enable] •...
Page 171 8.2 Performing Synchronization  Performing synchronization Synchronous operation is performed in the master unit. Synchronous operation is performed in the Utility screen of the master unit. Select [ Sync] on the Utility screen, and then press the ENTER key. This runs the phase synchronization. In the Utility screen, At this time, the phase will be ...
Page 172 8.2 Performing Synchronization MEMO WF1947/WF1948...
Page 173: Using External Frequency Reference
Using External Frequency Reference Purpose of Using External Frequency Reference ........... 9-2 Connection and Usage Procedure of External Frequency Reference ....9-2 WF1947/WF1948...
Page 174: Purpose Of Using External Frequency Reference
9.1 Purpose of Using External Frequency Reference Purpose of Using External Frequency Reference This product uses a built-in crystal oscillator as the frequency reference, but you can also use the external 10 MHz clock as the frequency reference. Generally, the external frequency reference is used for the following purposes: •...
Page 175 9.2 Connection and Usage Procedure of External Frequency Reference Note that, in all cases, the floating voltage should be limited to 42 Vpk (DC + AC peak) or lower to prevent electric shocks. For the caution for the floating ground connection, ☞"3.3 Cautions on Floating Ground Connection"...
Page 176 9.2 Connection and Usage Procedure of External Frequency Reference  Enabling external frequency reference You can switch the enabled/disabled for the external frequency reference in the Utility screen. In the Utility screen, select [Ext Reference], and then press the ENTER key to switch an indicator to [Enable] from [Disable].
Page 177: Using User-Defined Units
10. Using User-defined Units 10.1 About User-defined Unit ..................10-2 10.2 Display and Setting in User-defined Unit ............10-2 10.3 Defining User-defined Units .................. 10-3 WF1947/WF1948 10-1...
Page 178: About User-Defined Unit
10.1 About User-defined Unit 10.1 About User-defined Unit For example, you can set the frequency in units of rpm (number of rotations per minute) instead of Hz. You can set a value converted to the mechanical deviation quantity or a value converted to the output voltage after the power amplifier output instead of voltage.
Page 179: Defining User-Defined Units
10.3 Defining User-defined Units 10.3 Defining User-defined Units  Setting screen The setting is done on the Utility screen. In the Utility screen, select the [User Unit] field and press the ENTER key. In the Utility screen, select the [User Unit] field and press the ENTER key The user-defined unit setting window opens.
Page 180 10.3 Defining User-defined Units log is a common logarithm whose base is 10. You need to pay attention to when you use a log formula for a value with the possibility of negative value such as the DC offset and phase. If a value before changing to the user-defined unit is zero (0), "-Inf"...
Page 181: Other Utility Settings
11. Other Utility Settings 11.1 Selecting Remote Interface [Remote] ..............11-2 11.2 Display Setting [Display] ..................11-2 11.3 Modify Knob and Modify Direction Setting [Modify Direction] ......11-2 11.4 Operation Sound Setting [Sound] ................. 11-3 11.5 Self Diagnosis [Self Check] ..................11-3 11.6 Product Information Display [Information] ............
Page 182: Selecting Remote Interface [Remote]
11.1 Selecting Remote Interface [Remote] 11.1 Selecting Remote Interface [Remote] Select the external control interface from USB or GPIB. GPIB address When you select USB, USB ID is displayed. When you select GPIB, set GPIB address GPIB EOI within the range of 0 to 30, and select EOI from Enable or Disable.
Page 183: Operation Sound Setting [Sound]
11.4 Operation Sound Setting [Sound] 11.4 Operation Sound Setting [Sound] Set whether or not the beep sounds when performing key operations, modify knob operation, or an error occurs. Operation sound 11.5 Self Diagnosis [Self Check] Checks the internal status. Before check, remove all cables other than the power cable from this product.
Page 184 11.6 Product Information Display [Information] MEMO WF1947/WF1948 11-4...
Page 185: Troubleshooting
12. Troubleshooting 12.1 Error Messages at Power-on .................. 12-2 12.2 Error Messages during Operation ................. 12-3 12.3 Conflict Messages for Modulation ................. 12-7 12.4 Conflict Message for Sweep ................... 12-8 12.5 Conflict Message for Burst ..................12-9 12.6 Suspected Failure ....................12-10 WF1947/WF1948 12-1...
Page 186: Error Messages At Power-On
12.1 Error Messages at Power-on 12.1 Error Messages at Power-on At power-on, self-diagnosis is performed and an error message is displayed if there are any problems. If you encounter any failure, contact us or our representatives. When a message that tells you machine is shut down due to overheat, check installation environment if the environment is not in hot so that the product become over heat.
Page 187: Error Messages During Operation
12.2 Error Messages during Operation 12.2 Error Messages during Operation Often run-time error messages are displayed when the setting exceeds the allowable output range. For example, when a rectangular wave is output and you try to set the frequency to 30MHz, an error is displayed and the frequency is set to the maximum frequency of a rectangular wave.
Page 188 12.2 Error Messages during Operation 22024: Start-locked occurred due to setting conflict The operation setting is not adequate in the MODU, SWEEP, or BURST mode. A given oscillation cannot be started. When pressing the soft-key [?] on the left end, the message concerning an improper item appears. 22025: SyncOut selection changed to Sync by selection of external modulation Modulation is changed from internal to external.
Page 189 12.2 Error Messages during Operation The duty variable range of a square is standard. The duty is changed to the value restricted by the frequency. When the duty variable range is standard, it is changes based on the frequency. 22037: High level changed due to Low level The change to the low level also changes the high level based on the possible output range.
Page 190 12.2 Error Messages during Operation 23045: Data out of range; Data discarded You tried to enter a value outside of setting range. The value entered is discarded. 23129: MOD/ADD IN connector used by external addition now The MOD/ADD IN connector is used for external addition. Cannot use if with external modulation at a time.
Page 191: Conflict Messages For Modulation
12.3 Conflict Messages for Modulation 12.3 Conflict Messages for Modulation This is a message by pressing soft-key (?), when the specified modulation cannot be performed due to inadequate settings. This message explains improper settings. HopFreq beyond upper limit for current Function The hop frequency is beyond the allowable range of the current waveform to output in FSK.
Page 192: Conflict Message For Sweep
12.4 Conflict Message for Sweep 12.4 Conflict Message for Sweep This is a message by pressing soft-key (?), when the specified sweep cannot be performed due to inadequate settings. This message explains improper settings. Frequency beyond upper limit for Gated sweep The frequency is beyond the upper frequency of gated sweep.
Page 193: Conflict Message For Burst
12.5 Conflict Message for Burst 12.5 Conflict Message for Burst This is a message by pressing soft-key (?), when the specified burst cannot be performed due to inadequate settings. This message explains improper settings. BrstMode not compatible with current Function The burst oscillation mode is not adequate for the current waveform.
Page 194: Suspected Failure
12.6 Suspected Failure 12.6 Suspected Failure When an anomaly is suspected, perform one of the actions listed below. If this fails to correct the problem, contact NF Corporation or the distributor. Contents Possible Cause Action Reference page Power supply is...
Page 195: Maintenance
13. Maintenance 13.1 Overview ......................... 13-2 13.2 Operation Inspection ....................13-4 13.3 Performance Test ....................13-5 13.3.1 Frequency Accuracy Test ................13-5 13.3.2 Sine Wave Amplitude Accuracy Test ............13-6 13.3.3 DC Offset Accuracy Test ................13-6 13.3.4 Sine Wave Amplitude/Frequency Characteristics Test ......13-7 13.3.5 Sine Wave Total Harmonic Distortion Test ..........
Page 196: Overview
13.1 Overview 13.1 Overview What TO DO To use the equipment under the best condition, following maintenance tasks are needed. Operation Inspection Check to see if the equipment is operating correctly. Performance Test Check to see if the equipment satisfies the ratings. Adjustment and calibration If any rating is not satisfied, we will perform adjustment or calibration to recover the performance.
Page 197 13.1 Overview Equipment Used To perform the operation inspection and performance test, following equipments. Requirement Example Intended Purpose Digital AC Voltage Agilent 3458A Measurement of AC/DC Multi-meter TrueRMS voltage less than 100kHz Accuracy: ± 0.1% (1kHz ~ 100kHz) DC voltage Accuracy: ±...
Page 198: Operation Inspection
13.2 Operation Inspection 13.2 Operation Inspection Check Before Operation inspection Check followings before the operation inspection. The power supply voltage is within the rated range. Ambient temperature is within the range of 0 to +40°C. Ambient relative temperature is within the range of 5 to 85%RH (further more, the absolute temperature is 1 to 25g/m3).
Page 199: Performance Test
After the performance test, when the product does not meet the specification, it needs to be repaired. Please contact the NF or representatives. Check before the performance test Check followings before the performance test.
Page 200: Sine Wave Amplitude Accuracy Test
13.3 Performance Test 13.3.2 Sine Wave Amplitude Accuracy Test  Connection : FCTN OUT Digital multi-meter (AC voltage TrueRMS measurement) Use a coaxial cable. Setting : The following table (Frequency is set to 1kHz) shows the amplitude after initial setting. Measurement : Measure the output voltage for each waveform as the effective value.
Page 201: Sine Wave Amplitude/Frequency Characteristics Test
13.3 Performance Test 13.3.4 Sine Wave Amplitude/Frequency Characteristics Test  100kHz or lower  Connection : FCTN OUT Digital multi-meter (AC voltage TrueRMS measurement, and 50 termination) Use a coaxial cable. Setting : The following table shows the amplitude and frequency after initialization. Measurement : Measure the output voltage for each frequency as the effective value.
Page 202: Sine Wave Total Harmonic Distortion Test
13.3 Performance Test 13.3.5 Sine Wave Total Harmonic Distortion Test : FCTN OUT → audio analyzer (50 termination) Connection Use a coaxial cable. If the audio analyzer does not have a 50 termination, install a 50 terminator (feed-through terminator) at the input of the equipment.
Page 203: Sine Wave Non-Harmonic Spurious Test
13.3 Performance Test 13.3.7 Sine Wave Non-harmonic Spurious Test  Connection : FCTN OUT Spectrum analyzer Use a coaxial cable. Measure a signal up to approx. 24dBm. Use a coaxial attenuator separately not to exceed the allowable input of the spectrum analyzer.
Page 204: Square Wave Leading/Trailingg Time Test
13.3 Performance Test 13.3.9 Square Wave Leading/Trailing Time Test  Connection : FCTN OUT Oscilloscope (50 termination) Use a coaxial cable. Setting : Set the waveform to square, the frequency to 1MHz, and the amplitude to 20Vp-p/open after initial setting. The following table shows the duty variable range.
Page 205: List Of Initial Settings
14. List of Initial Settings WF1947/WF1948 14-1...
Page 206 14 List of Initial Settings When initialization is performed on the Utility screen (Reset), settings are initialized as follows. These items are also stored in the setting memory (except for output on/off s etting). The arbitration waveform memory, the setting memory, the user-defined unit setting, the output setting at power-on, the remote setting, and the panel operation settings are not initialized.
Page 207 14 List of Initial Settings Sweep Sweep type Frequency Frequency sweep range 1kHz ~ 10kHz Phase sweep range -90°~ 90° Amplitude sweep range 0.1Vp-p ~ 0.2Vp-p DC offset sweep range -0.1V ~ 0.1V Duty sweep range 40% ~ 60% Sweep time 0.1sec Sweep Mode Continuous...
Page 208 14 List of Initial Settings External 10 MHz frequency reference Disabled External addition WF1947/WF1948 14-4...
Page 209 14 List of Initial Settings Followings are shipping settings that are not changed with initialization. Definition of user-defined unit Unit name usr1 ~ usr6 Formula (h+n)*m Output setting at power-on, panel operation settings Output at power-on Indicator Back light on, dark color Modify direction setting Right and downward Operation sound...
Page 210 14 List of Initial Settings MEMO WF1947/WF1948 14-6...
Page 211: Specifications
15. Specifications 15.1 Oscillation Mode ..................... 15-2 15.2 Waveform ........................ 15-2 15.3 Frequency, Phase ....................15-3 15.4 Output Characteristics ..................15-3 15.5 Signal Characteristics .................... 15-5 15.6 Modulated Oscillation Mode .................. 15-7 15.7 Sweep Oscillation Mode ..................15-10 15.8 Burst Oscillation Mode ..................15-12 15.9 Triggers .........................
Page 212: Oscillation Mode
15.1 Oscillation mode Numeric values marked as *1 are guaranteed values. The other numeric values are not guaranteed values but nominal values or typical values (mark as typ.). If not specified, the condition is that oscillation is continuous, the load is 50  , the amplitude setting is 10Vp-p/50...
Page 213: Frequency, Phase
15.3 Frequency, phase 15.3 Frequency, phase Frequency setting range Oscillation mode Continuous, modulation, Sweep (gated single) sweep (continuous and single) Burst Waveform Sine wave 0.01µHz~30MHz 0.01µHz~10MHz Rectangular wave 0.01µHz~20MHz 0.01µHz~10MHz Pulse wave 0.01µHz~20MHz 0.01µHz~10MHz Ramp wave 0.01µHz~5MHz Noise Fixed to equivalent bandwidth 26MHz Set the frequency invalid Arbitrary waveform 0.01µHz~5MHz...
Page 214: Dc Offset
15.4 Output Characteristics described above or during AM/amplitude sweep, the amplitude is reduced digitally, the amplitude resolution become lower. 15.4.2 DC Offset Setting range ±10V/open, ±5 V/50 A peak value combined waveform amplitude and DC offset is limited to ±10V or lower/open. Setting resolution ±499.9mV or lower 4 digits or 0.1mV ±0.5V or higher 5 digits or 1mV...
Page 215: Signal Characteristics
15.5 Signal Characteristics Output voltage TTL level (low level 0.4V or lower, high level 2.7V or higher/open) (each type of synchronized signal) -3V to +3V/open (internal modulation signal) 0V to +3V/open (sweep X drive) 50Ω, Unbalanced Output impedance 50  or higher recommended Load impedance Output connector Front panel, BNC receptacle...
Page 216: Pulse Wave
15.5 Signal Characteristics Duty is variable at the range of 10 to 90% at 4MHz Extended range: There is jitter of 2.5ns rms or lower typ., and the duty can be always changed at the maximum range. Averagely, pulses are equal to the set duty, even though when the pulse width is narrower than 8.4ns, pulses may disappear.
Page 217: Ramp Wave
15.6 Modulated Oscillation Mode Upper and lower limit of duty setting are computed by upper and lower value/period above. Leading time, Trailing time Setting range 15.0ns to 62.5Ms (resolution 3 digits or 0.1ns) Independent setting of Leading/Trailing time Leading time and Trailing time is limited by frequency, pulse width duty, and pulse width time.
Page 218: Fsk
15.6 Modulated Oscillation Mode When internal modulation waveform is noise, the level is fixed to low. Output connector Shared with synchronization/sub-out connector Internal modulation signal output Output voltage -3V to +3V/open Output connector Shared with synchronization/sub-out connector External modulation input (except for FSK and PSK) Input voltage range ±1V Full scale Maximum allowable input...
Page 219: Psk
15.6 Modulated Oscillation Mode 15.6.4 PM Carrier waveform Standard waveform except for noise and DC and an arbitrary waveform. Peak deviation setting range 0.000° to 180.000° (resolution 0.001°) Carrier phase ± peak deviation is limited within the range of ±1800°. 15.6.5 PSK Carrier waveform Standard waveform except for noise and DC and an...
Page 220: Sweep Oscillation Mode
15.7 Sweep Oscillation Mode allowable range of duty for each carrier waveform. 15.7 Sweep Oscillation Mode 15.7.1 General Sweep type Frequency, phase, amplitude, DC offset, and duty Sweep function One way (lump waveform), two way (triangular wave) (switch) Linear, logarithmic (switch) Common regardless of sweep type However, logarithmic can use only frequency sweep Sweep range setting...
Page 221: Frequency Sweep
15.7 Sweep Oscillation Mode Common regardless of sweep type Remarks When the waveform is Noise, oscillation start/stop phase is invalid, stop level is always valid. When the waveform is DC, oscillation start/stop phase is invalid, stop level is invalid. For phase sweep, sweep starting value is oscillation start phase and sweep stop value is oscillation stop phase Oscillation stop unit when gated single One wave, 0.5 wave (switch) Sweep synchronization/marker output...
Page 222: Amplitude Sweep
15.8 Burst oscillation mode Setting range of start and stop phase -1800.000° to 1800.000°(resolution 0.001°) Remarks: The setting value is same as the phase setting for other oscillation mode 15.7.4 Amplitude Sweep Waveform Standard waveform except for DC and arbitrary waveform.
Page 223 15.8 Burst oscillation mode waveform. Mark wave number setting range 0.5 to 999,999.5, 0.5 wave unit Number of space wave setting range 0.5 to 999,999.5, 0.5 wave unit Stop oscillation unit at gate One wave, 0.5 wave (switch) Setting range of start/stop oscillate -1800.000°...
Page 224: Triggers
15.9 Triggers 15.9 Triggers External Application Used for single sweep, gated single sweep, trigger burst, gate, trigger gate Input voltage TTL level (low level 0.8V or lower, high level is 2.6V or higher) Maximum allowable input -0.5V +5.5V Polarity Positive, negative, disable (switch) FSK, PSK, sweep (each is independent setting) Minimum pulse width 50ns...
Page 225 15.10 Other I/Os Input voltage -1V +1V Maximum allowable input ±2V Input frequency DC 10MHz (-3dB) Input impedance Balanced/10k , Unbalanced Input connector Front panel (WF1947)/ rear panel (WF1948), BNC receptacle Shared with external modulation input. Cannot be used with external modulation and external addition at a time. WF1947/WF1948 15-15...
Page 226: 2-Channel Coordination (Wf1948 Only)
15.11 2-Channel Coordination (WF1948 Only) 15.11 2-Channel Coordination (WF1948 Only) Channel mode Channel mode Action Independent Independent setting 2 phase Keeps same frequency. Also controls to keep same frequency for frequency sweep, internal frequency modulation, and internal FSK. External frequency modulation and external FSK is not allowed. Phase is independent setting among each channel.
Page 227: Synchronization Of Multiple Units
15.12 Synchronization of Multiple Units 15.12 Synchronization of Multiple Units Connection Connection Method 1 Master unit Slave unit Slave unit Slave unit External 50Ω reference termination can be used resistor connector connector Connection Method 2 Master unit Slave unit Slave unit External reference can be used...
Page 228: User-Defined Unit
15.13 User-defined unit 15.13 User-defined unit Function Set and display settings in any unit based on a specified conversion expression Setting target Frequency (Hz), period (sec), amplitude (Vp-p, Vpk), DC offset (V), phase (deg), and duty (%) Conversion formula [(setting target value) + n] x m, or [log (setting target value) + n] x m Specify a conversion expression and values of n and m...
Page 229: General Characteristics
15.15 General Characteristics 15.15 General Characteristics Indicator 3.5 inch TFT color LCD I/O ground Signal grounds for waveform output (FCTN OUT), synchronize/sub-output (SYNC/SUB OUT), external modulation/add input (MOD/ADD IN) are insulated from the enclosure. These signal grounds within same channel is common. Signal ground for external 10MHz reference input (10MHz REF IN) is insulated from the enclosure.
Page 230 15.15 General Characteristics Safety and EMC (Applied only to models with the CE marking displayed on the rear panel) EN 61010-1:2010, EN 61326-1:2013(Group 1, Class A) EN 61000-3-2:2014 EN 61000-3-3:2013 RoHS EN 50581:2012 WF1947/WF1948 15-20...
Page 231: Outline Dimensional Drawing (Wf1947)
15.15 General Characteristics Outline dimensional drawing (WF1947) WF1947/WF1948 15-21...
Page 232: Outline Dimensional Drawing (Wf1948)
15.15 General Characteristics Outline dimensional drawing (WF1948) WF1947/WF1948 15-22...
Page 233: Inch Rack Mount Dimensional Drawing (For 1 Unit)
15.15 General Characteristics Inch rack mount dimensional drawing (for 1 unit) WF1947/WF1948 15-23...
Page 234: Inch Rack Mount Dimensional Drawing (For 2 Units)
15.15 General Characteristics Inch rack mount dimensional drawing (for 2 units) WF1947/WF1948 15-24...
Page 235: Millimeter Rack Mount Dimensional Drawing (For 1 Unit)
15.15 General Characteristics Millimeter rack mount dimensional drawing (for 1 unit) WF1947/WF1948 15-25...
Page 236: Millimeter Rack Mount Dimensional Drawing (For 2 Units)
15.15 General Characteristics Millimeter rack mount dimensional drawing (for 2 units) WF1947/WF1948 15-26...
Page 237 All NF products are warranted against defects in materials and workmanship for a period of one year from the date of shipment. During the warranty period, NF will repair the defective product without any charge for the parts and labor. For repair service under warranty, the product must be returned to either NF or an agent designated by NF.
Page 238  Should you notice any doubtful or wrong statement, or lack of description, please contact us or our agent. ©Copyright 2012-2016, NF Corporation WF1947/WF1948 Instruction Manual (Operations) NF Corporation...
Page 239 NF Corporation 6-3-20, Tsunashima Higashi, Kohoku-ku, Yokohama 223-8508 JAPAN...

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Wave factory wf1948

NF Wave Factory WF1947 Instruction Manual

1 Outline

2 Preparations before Use

3 Panels and I/O Terminals

4 Basic Operation

5 Saving and Recalling Settings

6 Creating Arbitrary Waveforms

7 Convenient Use of 2-Channel Equipment (WF1948 Only)

8 Synchronizing Multiple Units

9 Using External Frequency Reference

10 Using User-Defined Units

11 Other Utility Settings

12 Troubleshooting

13 Maintenance

14 List of Initial Settings

15 Specifications

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