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54

Agilent E8663B Analog Signal Generator User’s Guide

Optimizing Performance
Creating and Applying User Flatness Correction

7.

Press

# of Points

>

10

>

Enter

.

Steps 4, 5, and 6 enter the desired flatness- corrected frequencies into the step array.

8.

Press

Return

>

Load Cal Array From Step Array

>

Confirm Load From Step Data

.

This populates the user flatness correction array with the frequency settings defined in the step
array.

9.

Press

Amplitude

>

More (1 of 2)

>

Ampl Offset

.

Enter a nominal (average) value for the gain or loss of any cables or other devices connected
between the signal generator’s RF output and the power sensor. Refer to figure

. Gain is entered as a positive number while loss is entered as a negative number.

10. Press

RF On/Off

.

This activates the RF output and the

RF ON

annunciator is displayed on the signal generator.

Perform the User Flatness Correction

NOTE

If you are not using an Agilent E4416A/17A/18B/19B power meter, or if your power meter
does not have a GPIB interface, you can perform the user flatness correction manually. For
instructions, see

“Performing the User Flatness Correction Manually” on page 54

.

1.

Press

More (1 of 2)

>

User Flatness

>

Do Cal

.

Pressing the

Do Cal

softkey causes the signal generator to perform the user flatness correction

routine. A progress bar is shown on the front panel display as the routine runs. The routine
generates a table of correction points with each correction point consisting of a frequency and
amplitude correction value for that frequency. The correction value at each point is the difference
between the power level, as measured by the power meter, and the output power of the signal
generator.

NOTE

A power meter timeout may occur at low power levels. If a power meter timeout error
message appears, increase the timeout value by pressing

Amplitude

>

More (1 of 2)

>

User Flatness >

More (1 of 2) > Meter Timeout

.

2.

Press

Done

.

Pressing the

Done

softkey loads the amplitude correction values into the user flatness correction

array.

If desired, press

Configure Cal Array

.

This opens the user flatness correction array, where you can view the stored amplitude correction
values. The user flatness correction array title displays

User Flatness: (UNSTORED)

indicating

that the current user flatness correction array data has not been saved to the memory catalog.

Performing the User Flatness Correction Manually

If you are not using an Agilent E4416A/17A/18B/19B power meter, or if your power meter does not
have a GPIB interface, complete the steps in this section and then continue with the user flatness
correction tutorial.

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Summary of Contents for E8663B

Page 1: ...63B Analog Signal Generator For the latest revision of this guide go to http www agilent com find e8663b and click Product Library Manufacturing Part Number E8663 90003 Printed in USA March 2007 Copyright 2006 2007 Agilent Technologies Inc ...

Page 2: ...roducts to which it pertains including but not limited to the implied warranties of merchantability and fitness for a particular purpose Agilent shall not be liable for errors or for incidental or consequential damages in connection with the furnishing use or performance of this document or any of the Agilent products to which it pertains Should Agilent have a written contract with the User and sh...

Page 3: ...inuous Wave 4 Swept Signal 4 Analog Modulation 4 Front Panel 5 1 Display 5 2 Softkeys 6 3 Knob 6 4 Amplitude 6 5 Frequency 6 6 Save 6 7 Recall 6 8 Trigger 6 9 MENUS 7 10 Help 7 11 EXT 1 INPUT 7 12 EXT 2 INPUT 7 13 LF OUTPUT 8 14 Mod On Off 8 15 ALC INPUT 8 16 RF On Off 8 17 Numeric Keypad 8 18 RF OUTPUT 8 19 SYNC OUT 8 20 VIDEO OUT 9 21 Incr Set 9 22 GATE PULSE TRIGGER INPUT 9 23 Arrow Keys 9 24 H...

Page 4: ...xt Area 14 7 Softkey Label Area 14 Rear Panel 15 1 Source Module Interface 17 2 1 GHz Output 17 3 AC Power Receptacle 17 4 GPIB 17 5 10 MHz EFC 17 6 10 MHz IN 17 7 AUXILIARY INTERFACE 17 8 10 MHz OUT 18 9 LAN 18 10 SWEEP OUT 18 11 Z AXIS BLANK MKRS 18 12 SWEEP OUT 18 13 TRIGGER OUT 19 14 TRIGGER IN 19 15 SOURCE SETTLED 19 16 RF OUT 19 17 EXT 1 Input 19 18 EXT 2 Input 19 19 LF OUT 19 20 PULSE SYNC ...

Page 5: ...erstanding E8663B Memory Types 36 Removing Sensitive Data from E8663B Memory 38 Using the Secure Display 40 Enabling Options 41 Enabling a Software Option 41 Using the Web Server 42 Activating the Web Server 43 3 Optimizing Performance 47 Using the ALC 47 Selecting ALC Bandwidth 47 To Select an ALC Bandwidth 47 Using External Leveling 48 To Level with Detectors and Couplers Splitters 48 Creating a...

Page 6: ... Pulse Modulation 62 Configuring the LF Output 63 To Configure the LF Output with an Internal Modulation Source 63 To Configure the LF Output with a Function Generator Source 64 5 Troubleshooting 65 RF Output Power Problems 65 No RF Output Power when Playing a Waveform File 65 RF Output Power too Low 66 The Power Supply has Shut Down 66 Signal Loss While Working with a Mixer 66 Signal Loss While W...

Page 7: ... Turn Off Help Mode 72 Signal Generator Locks Up 72 Fail Safe Recovery Sequence 72 Error Messages 73 Error Message File 74 Error Message Format 74 Error Message Types 74 Contacting Agilent Sales and Service Offices 75 Returning a Signal Generator to Agilent Technologies 75 ...

Page 8: ...Contents Agilent E8663B Analog Signal Generator User s Guide viii ...

Page 9: ...ing Programming Guide Getting Started with Remote Operation Using IO Interfaces Programming Examples Programming the Status Register System Creating and Downloading Waveform Files Creating and Downloading User Data Files SCPI Reference Using this Guide System Commands Basic Function Commands Analog Commands SCPI Command Compatibility Service Guide Troubleshooting Replaceable Parts Assembly Replace...

Page 10: ...x Agilent E8663B Analog Signal Generator User s Guide ...

Page 11: ...he signal generator such as data sheets configuration guides application notes frequently asked questions technical support software and more visit the Agilent web page at http www agilent com find e8663b E8663B Signal Generator Features The E8663B includes the following standard features ultra low phase noise step attenuator pulse modulation internal pulse generator external modulation inputs sel...

Page 12: ...gle bus remote and external CW output from 100 kHz to the highest operating frequency depending on the option frequency resolution to 0 001 Hz list and step sweep of frequency and amplitude with multiple trigger sources user flatness correction external diode detector leveling automatic leveling control ALC on and off modes power calibration in ALC off mode is available even without power search 1...

Page 13: ...irmware to your signal generator using a LAN connection and a PC For information on equipment requirements and alternate methods of downloading firmware such as GPIB refer to the Firmware Upgrade Guide which can be accessed at http www agilent com find upgradeassistant 1 Note the IP address of your signal generator To view the IP address on the signal generator press Utility GPIB RS 232 LAN LAN Se...

Page 14: ...rified click Next and follow the on screen prompts NOTE Once the download starts it cannot be aborted NOTE When the User Attention message appears you must first cycle the instrument s power then click OK When the upgrade completes the Upgrade Assistant displays a summary 15 Click OK and close the Upgrade Assistant Modes of Operation Depending on the model and installed options the signal generato...

Page 15: ...e settings and error messages Softkey labels are located on the right hand side of the display For more detail on the front panel display see Front Panel Display on page 11 1 Display 9 MENUS 17 Numeric Keypad 25 Return 2 Softkeys 10 Help 18 RF OUTPUT 26 Contrast Decrease 3 Knob 11 EXT 1 INPUT 19 SYNC OUT 27 Contrast Increase 4 Amplitude 12 EXT 2 INPUT 20 VIDEO OUT 28 Local 5 Frequency 13 LF OUTPUT...

Page 16: ...rough 99 It is used to store and recall frequency amplitude and modulation settings The Save hardkey provides a quick alternative to reconfiguring the signal generator through the front panel or SCPI commands when switching between different signal configurations Once an instrument state has been saved all of the frequency amplitude and modulation settings can be recalled with the Recall hardkey F...

Page 17: ...ngle mode In addition each key is active meaning that the key function is executed except for the Preset key 11 EXT 1 INPUT This female BNC input connector accepts a 1 Vp signal for AM FM and ΦM For these modulations 1 Vp produces the indicated deviation or depth When ac coupled inputs are selected for AM FM or ΦM and the peak input voltage differs from 1 Vp by more than 3 percent the HI LO displa...

Page 18: ... 1EM this input is relocated to the rear panel 16 RF On Off Pressing this hardkey toggles the operating state of the RF signal present at the RF OUTPUT connector Although you can set up and enable various frequency power and modulation states the RF and microwave output signal is not present at the RF OUTPUT until RF On Off is set to On The RF On Off annunciator is always visible in the display to...

Page 19: ...nominal input impedance is 50 ohms On signal generators with Option 1EM this input is relocated to the rear panel 23 Arrow Keys These up and down arrow hardkeys are used to increase or decrease a numeric value step through displayed lists or to select items in a row of a displayed list Individual digits or characters may be highlighted using the left and right arrow hardkeys Once an individual dig...

Page 20: ...s when the signal generator power switch is set to the on position 31 LINE In the on position this switch activates full power to the signal generator in standby it deactivates all signal generator functions In standby the signal generator remains connected to the line power and power is supplied to some internal circuits 32 Standby LED This yellow LED indicates when the signal generator power swi...

Page 21: ...ions of the signal generator display This section describes each region Figure 1 2 Front Panel Display Diagram 1 Active Entry Area The current active function is shown in this area For example if frequency is the active function the 1 Active Entry Area 5 Error Message Area 2 Frequency Area 6 Text Area 3 Annunciators 7 Softkey Label Area 4 Amplitude Area ...

Page 22: ...tput level AM This annunciator appears when amplitude modulation is on ARMED This annunciator appears when a sweep has been initiated and the signal generator is waiting for the sweep trigger event ATTEN HOLD This annunciator appears when the attenuator hold function is on When this function is on the attenuator is held at its current setting ENVLP This annunciator appears if a burst condition exi...

Page 23: ...appears when the signal generator is remotely controlled over the GPIB RS 232 or VXI 11 Sockets LAN interface TELNET operation does not activate the R annunciator When the R annunciator is on the front panel keys are disabled except for the Local key and the line power switch For information on remote operation refer to the E8663B Signal Generator Programming Guide RF ON OFF This annunciator indic...

Page 24: ... display Indicators are also displayed in this area when amplitude offset is used amplitude reference mode is turned on external leveling mode is enabled and when user flatness is enabled 5 Error Message Area Abbreviated error messages are reported in this space When multiple error messages occur only the most recent message remains displayed Reported error messages with details can be viewed by p...

Page 25: ... rear panel Figure 1 4 on page 16 shows an E8663B rear panel with Option 1EM Option 1EM moves all front panel connectors to the real panel Figure 1 3 Standard Rear Panel Diagram 1 Source Module Interface 6 10 MHz IN 11 Z AXIS BLANK MKRS 2 1 GHz Output 7 AUXILIARY INTERFACE 12 SWEEP OUT 3 AC Power Receptacle 8 10 MHz OUT 13 TRIGGER OUT 4 GPIB 9 LAN 14 TRIGGER IN 5 10 MHz EFC 10 SWEEP OUT 15 SOURCE ...

Page 26: ...odule Interface 9 LAN 17 EXT 1 Input 2 1 GHz Output 10 SWEEP OUT 18 EXT 2 Input 3 AC Power Receptacle 11 Z AXIS BLANK MKRS 19 LF OUT 4 GPIB 12 SWEEP OUT 20 PULSE SYNC OUT 5 10 MHz EFC 13 TRIGGER OUT 21 PULSE VIDEO OUT 6 10 MHz IN 14 TRIGGER IN 22 PULSE TRIG GATE INPUT 7 AUXILIARY INTERFACE 15 SOURCE SETTLED 23 ALC INPUT 8 10 MHz OUT 16 RF OUT ...

Page 27: ...nominal input impedance is greater than 1 Mohms When not in use this connector should be shorted using the supplied shorting cap to assure a stable operating frequency 6 10 MHz IN This female BNC connector accepts an external timebase reference input signal level of 3 dBm The reference must be 1 2 2 5 5 or 10 MHz within 1 ppm The signal generator detects when a valid reference signal is present at...

Page 28: ...ep and goes to 10 V nominal at the end of sweep regardless of sweep width The nominal output impedance is less than 1 ohm and can drive a 2 kohm load 11 Z AXIS BLANK MKRS This female BNC connector supplies a 5 V nominal level during retrace and band switch intervals of a step or list sweep This signal is derived from an operational amplifier output so the load impedance should be greater than or e...

Page 29: ... The nominal input impedance for this connector is approximately 4 2 kohms 15 SOURCE SETTLED This female BNC connector provides a 3 volt CMOS output trigger indicating when the signal generator has settled to a new frequency or power level A high indicates that the source has not settled A low indicates that the source has settled The nominal output impedance for this connector is less than 10 ohm...

Page 30: ...el For a description of this connector see 20 VIDEO OUT on page 9 22 PULSE TRIG GATE INPUT On standard instruments this connector resides on the front panel For a description of this connector see 22 GATE PULSE TRIGGER INPUT on page 9 23 ALC INPUT On standard instruments this connector resides on the front panel For a description of this connector see 15 ALC INPUT on page 8 ...

Page 31: ... Editors on page 22 Configuring a Continuous Wave RF Output on page 24 Configuring a Swept RF Output on page 26 Turning On a Modulation Format on page 31 Applying a Modulation Format to the RF Output on page 31 Using Data Storage Functions on page 32 Using the Instrument State Registers on page 34 Using Security Functions on page 36 Enabling Options on page 41 Using the Web Server on page 42 ...

Page 32: ...ator displays the List Mode Values table editor as shown below Figure 2 1 Active Function Area displays the active table item while its value is edited Cursor an inverse video identifier used to highlight specific table items for selection and editing Table Softkeys select table items preset table values and modify table structures Table Items values arranged in numbered rows and titled columns Th...

Page 33: ...that occupy rows outside the limits of the ten row table display area More 1 of 2 accesses Load Store and its associated softkeys Load Store opens a menu of softkeys LoadFromSelectedFile StoreToFile DeleteFile GotoRow PageUp and Page Down used to load table items from a file in the memory catalog or to store the current table items as a file in the memory catalog Modifying Table Items in the Data ...

Page 34: ... RF On Off The RF On Off hardkey must be pressed before the RF signal is available at the RF OUTPUT connector The display annunciator changes from RF OFF to RF ON The maximum specified frequency should be output at the RF OUTPUT connector at the signal generator s minimum power level 4 Press Frequency 700 MHz The 700 MHz RF frequency should be displayed in the FREQUENCY area of the display and als...

Page 35: ... MHz The signal generator s true output frequency is 700 MHz If the Freq Ref softkey is toggled to Off the front panel will indicate the actual frequency 700 MHz The REF indicator appears on the front panel display and the Freq Ref Off On softkey toggles to On 3 Turn on the RF output Press RF On Off The display annunciator changes from RF OFF to RF ON The RF frequency at the RF OUTPUT connector is...

Page 36: ...e reference value 20 dBm The REF indicator activates and the Ampl Ref Off On softkey toggles On 4 Turn the RF output on Press RF On Off The display annunciator changes to RF ON The power at the RF OUTPUT connector is 20 dBm 5 Change the amplitude increment value to 10 dB Press Incr Set 10 dB 6 Use the up arrow key to increase the output power by 10 dB The AMPLITUDE area displays 10 00 dB which is ...

Page 37: ...n When the Sweep Direction Down Up softkey is set to Up values are swept from the start amplitude frequency to the stop amplitude frequency When set to Down values are swept from the stop amplitude frequency to the start amplitude frequency When a step sweep is activated the signal generator sweeps the RF output based on the values entered for RF output start and stop frequencies and amplitudes a ...

Page 38: ...weep in progress To see the frequencies sweep again press SingleSweep to trigger the sweep To Configure a Continuous Step Sweep Press Sweep Repeat Single Cont This toggles the sweep from single to continuous A continuous repetition of the frequencies and amplitudes configured in the step sweep are now available at the RF OUTPUT connector The SWEEP annunciator appears on the display indicating that...

Page 39: ...efault list contains one point set to the signal generator s maximum frequency minimum amplitude and a dwell time of 2 ms 4 Press More 1 of 2 Load List From Step Sweep Confirm Load From Step Data The points you defined in the step sweep are automatically loaded into the list To Edit List Sweep Points 1 Press Return Sweep Off Turning the sweep off allows you to edit the list sweep points without ge...

Page 40: ...plicate of the highlighted dwell time is inserted for point 9 shifting the existing value down to complete the entry for point 10 To Configure a Single List Sweep 1 Press Return Sweep Freq Ampl This turns the sweep on again No errors should occur if all parameters for every point have been defined in the previous editing process 2 Press Single Sweep The signal generator will single sweep the point...

Page 41: ...ays the state of the modulation format as well as the active modulation format annunciator The modulation format generates but the carrier signal is not modulated until you apply it to the RF output see page 31 Depending on the modulation format the signal generator may require a few seconds to build the signal Figure 2 2 Example of AM Modulation Format Off and On Applying a Modulation Format to t...

Page 42: ...ctive Figure 2 3 Carrier Signal Modulation Status Using Data Storage Functions This section explains how to use the two forms of signal generator data storage the memory catalog and the instrument state register Using the Memory Catalog The Memory Catalog is the signal generator s interface for viewing storing and saving files it can be accessed through the signal generator s front panel or a remo...

Page 43: ...s modified Viewing Stored Files in the Memory Catalog 1 Press Utility Memory Catalog Catalog Type All files in the memory catalog are listed in alphabetical order regardless of which catalog type you select File information appears on the display and includes the file name file type file size and the date and time the file was modified 2 Press List The Catalog of List Files is displayed 3 Press Ca...

Page 44: ...an instrument state has been saved recalling that state will set up the generator with the saved settings and load the associated file data For more information on storing file data such as modulation formats and table entries refer to Storing Files to the Memory Catalog on page 33 Refer to the E8663B Analog Signal Generator Programming Guide and the E8663B Analog Signal Generator Key Reference fo...

Page 45: ...e active function Press the up arrow key once to select register 1 Your stored instrument state settings should have been recalled Deleting Registers and Sequences These procedures describe how to delete registers and sequences saved to an instrument state register Deleting a Specific Register within a Sequence 1 Press Preset 2 Press the Recall or Save hardkey Notice that the Select Seq softkey sh...

Page 46: ...ral memory types each used for storing a specific type of data Before removing sensitive data it is important to understand how each memory type is used in the signal generator The following tables describe each memory type used in the base instrument Table 2 2 Base Instrument Memory Memory Type and Size Writable During Normal Operation Data Retained When Powered Off Purpose Contents Data Input Me...

Page 47: ... status firmware operations CPU board The battery can be removed to sanitize the memory but must be reinstalled for the instrument to operate The battery is located on the CPU board Bootrom Memory Flash 128 kB No Yes CPU bootup program and firmware loader updater factory programmed CPU board During normal operation this memory cannot be overwritten or erased This read only data is programmed at th...

Page 48: ...rwrites the various memory types in accordance with Department of Defense DoD standards as described below To carry out this function press Utility Memory Catalog More 1 of 2 Security Erase and Overwrite All Confirm Overwrite Erase and Sanitize All This function performs the same actions as Erase and Overwrite All and then adds more overwriting actions After executing this function you must manual...

Page 49: ...ST command This information can only be changed or cleared by entering new data User IQ Cal File Vector Models Only When a user defined IQ calibration has been performed the cal file data is removed by setting the cal file to default as follows 1 On the front panel press I Q I Q Calibration Revert to Default Cal Settings 2 Send these commands CAL IQ DEF CAL WBIQ DEF Using the Secure Mode The secur...

Page 50: ...erator Service Guide for disassembly procedures Either Discard the processor board and send the instrument to a repair facility A new processor board will be installed and the instrument will be repaired and calibrated If the instrument is still under warranty you will not be charged for the new processor board or If you have another working instrument install the processor board into that instrum...

Page 51: ...tions are implemented in software but require the presence of optional hardware in the instrument This example shows you how to enable software options Enabling a Software Option A license key provided on the license key certificate is required to enable each software option 1 Access the Software Options menu Utility Instrument Adjustments Instrument Options Software Options The following is an ex...

Page 52: ... X in the Selected column of the appropriate hardware option in the Hardware Options menu 4 Enable the software option a Highlight the desired option b Press Modify License Key and enter the 12 character license key from the license key certificate c Verify that you want to reconfigure the signal generator with the new option Proceed With Reconfiguration Confirm Change The instrument enables the o...

Page 53: ...instrument Activating the Web Server Perform the following steps to access the Web Server 1 Turn on the Web Server by pressing Utility GPIB RS 232 LAN LAN Services Setup Web Server On 2 Press the Proceed With Reconfiguration softkey 3 Press the Confirm Change Instrument will Reboot softkey The signal generator will reboot 4 Launch your PC or workstation web browser 5 Enter the IP address of the si...

Page 54: ...44 Agilent E8663B Analog Signal Generator User s Guide Basic Operation Using the Web Server Figure 2 5 Signal Generator Web Page ...

Page 55: ...the web page For example click on the Frequency hardkey then use the front panel key pad to enter a frequency You can also use the up and down arrow keys to increase or decrease the frequency You can use the SCPI Command text box at the bottom of the front panel display to send commands to the signal generator Enter a valid SCPI command then click the SEND button The results of the command will be...

Page 56: ...46 Agilent E8663B Analog Signal Generator User s Guide Basic Operation Using the Web Server ...

Page 57: ...Hz and 100 kHz In automatic mode the preset selection the signal generator automatically selects the ALC bandwidth depending on the configuration and settings see Figure 3 1 Figure 3 1 Decision Tree for Automatic ALC Bandwidth Selection To Select an ALC Bandwidth Press Amplitude ALC BW 100 Hz 1 kHz 10 kHz or 100 kHz This overrides the signal generator s automatic ALC bandwidth selection with your ...

Page 58: ...ur during attenuator switching as the RF amplitude is changed A balance must be maintained between the amount of attenuation and the optimum ALC level to achieve the required RF output amplitude For optimum accuracy and minimum noise the ALC level should be greater than 10 dBm For example leveling the CW output of a 30 dB gain amplifier to a level of 10 dBm requires the output of the signal genera...

Page 59: ...at the detector port Typically this value is 10 to 20 dB Enter the positive dB value of this coupling factor into the signal generator 7 Press More 1 of 2 Ext Detector Coupling Factor 16 or the positive representation of the value listed at the detector port of the directional coupler dB Leveled output power is now available at the output of the directional coupler NOTE While operating in external...

Page 60: ...nal Generator User s Guide Optimizing Performance Using External Leveling factor to determine the leveled output power The range of power adjustment is approximately 20 to 25 dBm Figure 3 3 Typical Diode Detector Response at 25 C ...

Page 61: ...rrection User flatness correction allows the digital adjustment of RF output amplitude for up to 1601 frequency points in any frequency or sweep mode Using an Agilent E4416A 17A or E4418B 19B power meter controlled by the signal generator through GPIB to calibrate the measurement system a table of power level corrections is created for frequencies where power level variations or losses occur These...

Page 62: ...IB interface you can enter correction values manually Required Equipment Agilent E4416A 17A 18B 19B power meter Agilent E4413A E Series CW power sensor GPIB interface cable adapters and cables as required NOTE If the setup has an external leveling configuration the equipment setup in Figure 3 4 assumes that the steps necessary to correctly level the RF output have been followed If you have questio...

Page 63: ...r the power meter s GPIB address Enter c For E4417A and E4419B models press Meter Channel A B to select the power meter s active channel d Press Meter Timeout to adjust the length of time before the instrument generates a timeout error if unsuccessfully attempting to communicate with the power meter 3 Press More 2 of 2 Configure Cal Array More 1 of 2 Preset List Confirm Preset This opens the User ...

Page 64: ...sing the Do Cal softkey causes the signal generator to perform the user flatness correction routine A progress bar is shown on the front panel display as the routine runs The routine generates a table of correction points with each correction point consisting of a frequency and amplitude correction value for that frequency The correction value at each point is the difference between the power leve...

Page 65: ...ess table Save the User Flatness Correction Data to the Memory Catalog This process allows you to save the user flatness correction data as in the signal generator s memory catalog With several user flatness correction files saved to the memory catalog any file can be recalled loaded into the correction array and applied to the RF output to satisfy specific RF output flatness requirements 1 Press ...

Page 66: ...the signal generator to GPIB listener mode 1 Save your instrument state to the instrument state register For instructions see Saving an Instrument State on page 34 2 Press Amplitude More 1 of 2 User Flatness GPIB Listener Mode This presets the signal generator and returns it to GPIB listener mode The signal generator can now receive remote commands executed by a remote controller connected to the ...

Page 67: ...stments Reference Oscillator Adjustment Internal Ref Bandwidth 2 Select the desired bandwidth When using an external timebase reference 1 Press Utility Instrument Adjustments Reference Oscillator Adjustment External Ref Bandwidth 2 Select the desired bandwidth To Restore Factory Default Settings Internal Timebase 125 Hz External Timebase 25 Hz Press Utility Instrument Adjustments Reference Oscilla...

Page 68: ...58 Agilent E8663B Analog Signal Generator User s Guide Optimizing Performance Adjusting Reference Oscillator Bandwidth ...

Page 69: ...waves with individually adjustable frequencies and a percent of peak amplitude setting for the second tone available from function generator only Swept Sine swept sine wave with adjustable start and stop frequencies sweep rate and sweep trigger settings available from function generator only Triangle triangle wave with adjustable amplitude and frequency Ramp ramp with adjustable amplitude and freq...

Page 70: ...rate set to 10 kHz The shape of the waveform is a sine wave Notice that sine is the default selection for the AM Waveform softkey which can be viewed by pressing More 1 of 2 To Turn on Amplitude Modulation Follow these remaining steps to output the amplitude modulated signal 1 Press the AM Off On softkey to On 2 Press the front panel RF On Off key The AM and RF ON annunciators are now displayed Th...

Page 71: ...f the FM signal above or below the carrier frequency depending on the polarity of the DC level The amount frequency shift is directly related to the amplitude of the DC level A DC offset of 1 0 volt or greater will shift the external FM frequency by an amount equal to the maximum deviation setting For example if the signal generator CW frequency is 1 GHz and the maximum deviation setting is set to...

Page 72: ...ess Amplitude 0 dBm To Set the Pulse Period Width and Triggering 1 Press Pulse Pulse Period 100 usec 2 Press Pulse Pulse Width 24 usec 3 Press Pulse Pulse Source Int Gated 4 Connect a TTL signal to the Trigger In connector on the rear panel of the signal generator To configure the trigger signal polarity Press Utility Instrument Adjustments Signal Polarity Setup Trigger In Polarity The signal gene...

Page 73: ...k amplitude setting for the second tone available from function generator 1 only Swept Sine a swept sine wave with adjustable start and stop frequencies sweep rate and sweep trigger settings available from function generator 1 only Triangle triangle wave with adjustable amplitude and frequency Ramp ramp with adjustable amplitude and frequency Square square wave with adjustable amplitude and freque...

Page 74: ...efault source To Configure the LF Output with a Function Generator Source In this example the function generator is the LF output source Configuring the Function Generator as the LF Output Source 1 Press Preset 2 Press the LF Out hardkey 3 Press LF Out Source Function Generator 1 Configuring the Waveform 1 Press LF Out Waveform Swept Sine 2 Press LF Out Start Freq 100 Hz 3 Press LF Out Stop Freq 1...

Page 75: ...F annunciator on the display If it reads RF OFF press RF On Off to toggle the RF output on No RF Output Power when Playing a Waveform File Preset the signal generator then replay the waveform file If a header file is not specified for a waveform the signal generator uses a default header file with unspecified settings If you play a waveform file that has unspecified signal generator settings setti...

Page 76: ...y To exit the reference mode follow these steps a Press Amplitude More 1 of 2 b Press Ampl Ref Off On until Off is highlighted You can then reset the output power to the desired level 2 If you are using the signal generator with an external mixer see Signal Loss While Working with a Mixer on page 66 3 If you are using the signal generator with a spectrum analyzer see Signal Loss While Working with...

Page 77: ...dless of frequency this excess energy causes the ALC to reduce the RF output of the signal generator In this example the reverse power across the detector is actually greater than the ALC level which may result in loss of signal at the RF output Figure 5 2 on page 68 shows a similar configuration with the addition of a 10 dB attenuator connected between the RF output of the signal generator and th...

Page 78: ...he RF carrier is less than the ALC bandwidth the LO s reverse power can cause amplitude modulation of the signal generator s RF output The rate of the undesired AM equals the difference in frequency between the spectrum analyzer s LO feedthrough and the RF carrier of the signal generator Reverse power problems can be solved by using one of two unleveled operating modes ALC off or power search Sett...

Page 79: ... generator s automatic leveling control ALC off press Amplitude ALC Off On to Off 5 Turn the RF on set RF On Off to On 6 Press Do Power Search This executes the manual fixed power search routine which is the default mode There are three power search modes manual automatic and span When Power Search is set to Manual pressing Do Power Search executes the power search calibration routine for the curr...

Page 80: ...ting the Point Trigger softkey to Free Run to determine if a missing point trigger is blocking the sweep Is the dwell time appropriate Try setting the dwell time to one second to determine if the dwell time was set to a value which was too slow or too fast for you to see Do you have at least two points in your step sweep or list sweep Cannot Turn Off Sweep Mode Press Sweep List Sweep Off In the sw...

Page 81: ... With Previously Stored Instrument States are Empty The save recall registers are backed up by a battery when line power to the signal generator is not connected The battery may need to be replaced To verify that the battery has failed 1 Turn off line power to the signal generator 2 Unplug the signal generator from line power 3 Plug in the signal generator 4 Turn on the signal generator 5 Observe ...

Page 82: ...the front panel keypad press Local Make sure that the signal generator is not in local lockout condition Local lockout prevents front panel operation For more information on local lockout refer to the E8663B Analog Signal Generator Programming Guide Check for a progress bar on the signal generator display which indicates that an operation is in progress Press Preset Cycle power on the signal gener...

Page 83: ...help you eliminate any repeat occurrences Error Messages If an error condition occurs in the signal generator it is reported to both the front panel display error queue and the SCPI remote interface error queue These two queues are viewed and managed separately for information on the SCPI error queue refer to the E8663B Analog Signal Generator Programming Guide NOTE When there is an unviewed messa...

Page 84: ...ates a query error will not generate a device specific execution or command error Query Errors 499 to 400 indicate that the instrument s output queue control has detected a problem with the message exchange protocol described in IEEE 488 2 Chapter 6 Errors in this class set the query error bit bit 2 in the event status register IEEE 488 2 section 11 5 1 These errors correspond to message exchange ...

Page 85: ...violations include a data element that violates device listening formats or whose type is unacceptable to the device or an unrecognized header was received These include incorrect device specific headers and incorrect or unimplemented IEEE 488 2 common commands Contacting Agilent Sales and Service Offices Assistance with test and measurement needs and information on finding a local Agilent office ...

Page 86: ...76 Agilent E8663B Analog Signal Generator User s Guide Troubleshooting Returning a Signal Generator to Agilent Technologies ...

Page 87: ...ning 1 ARMED annunciator 12 arrow hardkeys 9 ATTEN HOLD annunciator 12 attenuator external leveling 48 automatic leveling control See ALC AUXILIARY INTERFACE connector 17 B bandwidth ALC selecting 47 reference oscillator adjusting 56 basic operation standard 21 binary files 32 bit files 32 bursted signals 47 C carrier signal modulating 31 CDMA 47 certificate license key 41 comments adding editing ...

Page 88: ...d overwrite 38 erase and sanitize 38 erasing memory 36 38 39 40 ERR annunciator 12 73 error messages display 14 message format 74 overview 73 queue 73 types 74 EXT annunciators 12 EXT continued INPUT connectors 7 input connectors 7 input connectors rear 19 external detector diode response 49 external FM 61 F fail safe recovery sequence 72 failures See troubleshooting FAQ 1 features signal generato...

Page 89: ...erface remote 56 K key license 41 keypad numeric 8 keys disabling 40 front panel 5 10 knob front panel 6 L L listener mode annunciator 13 lan configuration 42 LAN connector 18 LEDs 10 leveling ALC 8 68 external 48 51 internal 47 LF OUT connector 19 LF output 8 63 64 license key 41 line power LED 10 list error messages 74 files 32 mode values table editor 22 sweep 28 70 listener mode annunciator 13...

Page 90: ...ut OVEN COLD annunciator 13 overwriting memory 38 P Page Down softkey 23 Page Up softkey 23 performance optimizing 47 57 phase modulation See ΦM power meter 52 68 output troubleshooting 66 receptacle AC 17 18 search mode 69 supply troubleshooting 66 switch 10 Preset hardkey 10 private data 36 problems See troubleshooting product information 1 programming guide ix proprietary data 36 protecting dat...

Page 91: ...service Agilent sales and service offices 75 shape files 32 signal generator features 1 firmware firmware 3 models 1 modes 4 signal generator continued options options 3 overview 1 signal loss troubleshooting 65 single step sweep 27 softkeys 6 14 23 software available 1 options 3 SOURCE SETTLED OUTPUT connector 19 spectrum analyzer troubleshooting signal loss 68 standby LED 10 state files 32 step ...

Page 92: ...rigger polarity 62 troubleshooting 65 75 U UNLEVEL annunciator 14 UNLOCK annunciator 14 UNW option 2 4 59 62 upgrading firmware 3 user documentation ix user flatness 32 51 56 user defined files 32 V VIDEO OUT connector 9 VIDEO OUT connector rear 20 W waveform memory 36 waveforms analog modulation 59 file catalogs 32 web server 42 website web page 1 WFM1 files 32 ...

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