SF800 User Manual
Contents
1. FSK Arbitrary Waveform For FSK Arbitrary Waveforms a user developed file describing a set of frequency variations is uploaded to the SF800 and optionally saved in internal non volatile memory One arbitrary data set may be saved at a time FSK Arbitrary descriptor files may be created using a text editor or waveform generator software Arbitrary FSK allows the user to specify a set of frequency variations the user entered data includes Center frequency 17 SF800 USER MANUAL Maximum deviation Sample rate A set of descriptors that define the deviation for each sample point The output frequency changes at a time defined by the sample rate The actual output frequency is determined using the formula Fout lt center frequency gt deviation descriptor Where each descriptor is a floating point value in the range 1 0 to 1 0 For example a center frequency of 50 MHz with deviation 10 MHz and descriptor 0 5 will create a frequency of 45 MHz The file format and number of descriptors supported is described in the Creating Arbitrary Waveforms chapter below The drawing below illustrates how FSK Arbitrary Waveforms operate Frequency TIME F1 0 T5 0 1 25 25 4 Figure 18 Example of FSK Arbitrary waveform The FSK waveform shown above was created from the following text file number of points 7 statt with highest output frequency for 1 sample times 1 0 go down to center frequency and the2. Maximum Square AM modulating frequency is 40 KHz Maximum Sine AM modulating Frequency is 66 KHz SF800 USER MANUAL Arbitrary Waveforms Arbitrary Waveforms allow the user to define specific frequency or power values at a specified sample rate CHIRP testing can be executed easily with the SF800 by creating the appropriate arbitrary waveforms The following sections describe how to create upload and save Arbitrary Modulation files to the SF800 An Arbitrary Modulation selection will be displayed on the Edit Parameters menu of all waveforms that support arbitrary modulation Arbitrary Modulation Operation The Arbitrary Modulation mode of operation enables you to specify data points that describe a waveform and the rate of execution The maximum rates are shown in the following table Operation Sample Rate OOK 90 KHz FSK 90 KHz Square AM 80 KHz Sine AM 80 KHz Table 3 Arbitrary Waveform Maximum Sample Rate Waveform Descriptors Two types of descriptors are supported digital and floating point Digital Descriptors Digital descriptors are used in cases where the output is only in one of two states such as on off or frequency high low Up to 2048 digital descriptors are supported For example digital descriptors would be used for OOK operation or Square Wave AM Digital descriptors may be in floating point or integer format where values greater than 0 are considered TRUE and other values are cons
3. Waveform Operation Range OOK Modulating frequency 0 1 Hz to 500 KHz FSK ramped unramped Modulating frequency 0 1 Hz to 500 KHz FSK Arbitrary Modulating frequency 0 1 Hz to 26 KHz Sweep Frequency changes using step time of 10ms to 60s in 1ms increments Square AM wave Modulating frequency 0 1 Hz to 45 KHz Sine AM wave Modulating frequency 0 1 Hz to 65 K Hz Table 1 Operating Ranges 14 SF800 USER MANUAL Waveforms The SF800 provides a wide range of waveform modulation features from which you can create a variety of waveforms Numerous waveform modifiers may be applied to customize the output to meet your specific testing needs The waveforms modifiers and options are configured using the Wave Manager software In addition you may develop arbitrary modulation files to create your own unique type of FSK or AM modulated output An Arbitrary Modulation option will be displayed on the Edit Parameters screen of any waveform that supports user developed waveform modulation files Single Tone The Single Tone waveform outputs a continuous tone at the user selected output frequency Output types AC Coupled Differential Digital TTL 3 3V LVTTL 2 5V SVTTL 1 8V Options Externally or internally controlled OOK Externally controlled Start Note External control requires an external user provided modulating source TTL level FSK Unramped The Frequency Shift Keying FSK Unramp
4. differential driver conform to the LVPECL standard The driver and the recommended method of interfacing to it are described in the drawing below This differential driver is designed to work in 50 Ohm systems 12 SF800 USER MANUAL SMA P 6 O O t 50 Ohms gt Receiver Device 68 o 50 Ohms Vir 1 3V SF800 Figure 13 Differential Output Driver Digital Output The following block diagram shows the implementation of the programmable TTL output buffer Vout Control 1 8V 2 5V 3 3V Figure 14 Digital Output Driver Operating Limits AC Coupled output Differential output Digital TTL output o BDigital TTL o Coupled from 1 Hz to 100 MHz o AC Coupled above 100 MHz o Differential o The duty cycle Frequency1 direction External OOK FSK User driven signal Internal OOK OOK is supported for o AC Coupled output o Differential output o The duty cycle ON percentage Enable BNC 22 Ohms 12mA 12 100 KHz 800 MHz usable to 1 GHz 50 MHz 800 MHz usable to 1 GHz 1000 Hz 100 MHz Internal Max FSK deviation range is as follows Any deviation allowed Any deviation allowed Deviation 1 max Deviation 1 max 1096 to 9096 4 5 KHz maximum 500 KHz maximum Up to 100 MHz Full range 10 to 9096 except near the highest modulating frequency 13 SF800 USER MANUAL Operating Ranges
5. modulation D Sample rate hz P dBm Base E Rrbitrary modulation edit Q dBm Offset Select from above lt ESC gt to previous screen Figure 23 Enable Arbitrary Waveform option Next select Upload Arbitrary Waveform File and follow the onscreen instructions SF880 Arbitrary Modulation Menu No data points loaded F load data points from file L load data points from EEPROM File should contain number of points lt count gt followed by values where gt 0 selects frequency 2 else freqency 1 Select from above lt ESC gt to previous screen Figure 24 Upload Arbitrary Waveform File Note If you wish to save the arbitrary data to non volatile memory use the save option before exiting the arbitrary modulation menu 23 SF800 USER MANUAL Auxiliary UART The SF800 provides a transmit only UART port TX MOD pin 8 that may be used to send ASCII data characters to an internal or external modulation device This port is completely separate from the UART port used for the console The data that is sent by the auxiliary UART port can be ASCII data generated by a keyboard or from a file The baud rate is programmable at these rates 2400 4800 9600 19200 38400 and 57600 baud The Wave Manager software provides support for this UART port on the Auxiliary UART Menu under the Modify Active Menu entry You may connect the Auxiliary UART output using the appropriate filtering interface i
6. 0 000 000 00K internal DISRBLED Delta Freq hz 1 000 dBm Base 11 Ramp Rate hz dBm Offset F Frequency by value 1101 Output OFF dBm Offset Auxiliary UART Menu Select from above lt ESC gt to previous screen Figure 10 Modify Active Waveform Menu Frequency Step Up Step Down While either the Single Tone or FSK type waveform is running the frequency may be changed by stepping it up or down in discrete steps using the selections on the Modify Active Waveform menu in the case of FSK Frequency 1 is changed only The frequency may be repeatedly stepped up or down in increments of 1 Hz 10 Hz or 100Hz You may also enter a new frequency value by using menu selection F Power Level Attenuation Control dBm Base and Offset The Wave Manager software allows you to change the Base power level and the Offset during operation when the AC Coupled output is enabled The power values are entered in dBm Base Power dBm Base Base power may be increased or decreased within the supported range which is 11 dBm to 7 dBm Offset Allows you to adjust the Base Power to offset the losses of external connections i e interconnect cables For example You enter a frequency of 500 MHz and require an output of 5 dBm you then enter an offset of 2 dB causing the SF800 to drive the output at 7dBm After a cable loss of 2 dBm the output power measured at the Device
7. 00 dBm Offset FSK modulating freq hz 1 freql selected 50 press key to abort operation Figure 9 Running the new waveform Running the Waveform Return to the main Waveform Creation menu and select Run to start the new waveform You may run the waveform with or without saving it Saving Waveforms From the Waveform Creation menu you may chose to save the new waveform to one of the four non volatile memory locations You also have the option to save your waveform with the Load at Power up option The Load at Power Up feature causes the selected waveform to be loaded and started when the SF800 is first turned on This feature enables the SF800 to operate in a repeatable stand alone mode Note Saving a new configuration overwrites any previously saved configuration at that location In addition to the four memory locations one set of user developed arbitrary waveform data may be saved see the Arbitrary Waveform Modulation section below Modifying Waveforms On The Fly Some of the parameters of the Single Tone and FSK type waveforms may be modified during runtime providing you with increased flexibility to exercise specific areas of the device under test 10 SF800 USER MANUAL 8 800 Active Waveform Menu SK Triangle running tput External STRRT DISRBLED Frequency 1 hz 50 000 000 External OOK FSK DISABLED Frequency 2 hz 11
8. 20 dBc 500 MHz to 2 20 dBc Non Harmonics 100 KHz to 100 2 lt 0 100 MHz to 500 2 60 dBc 500 MHz to 800 2 60 dBc Clock feed through sss 85 dBm Output Match VSWR 1 MHz to 7 lt 2 1 7 dBm output 7 MHz to 800 gt 1 3 1 7dBm output SF800 USER MANUAL External Control Header Input 3 3V 5V Tolerant Output voltage TX MOD 5V Note Output ratings at 100 MHz 0 dBm output power and 25 C unless otherwise specified SF800 USER MANUAL Getting Started Power Adapter 110V AC power adapter with a 5VDC output is provided The power connector is on the rear panel Use only the power adapter that came with your SF800 Connecting the SF800 to Your Computer Attach a standard serial port cable with a DB 9 connector to the RS 232 port on the rear panel of the SF800 and the other end to the serial port on your computer Alternatively the SF800 may be connected to a USB connection on your computer by attaching an inline Keyspan 19HS serial port to USB adapter to the serial port cable Front Panel Connections id SIGNAL FORGE 800 iei Digitally Synthesized Signal Generator Senses gas ET iM Digital A C Couple
9. Bm Base 11 Ramp Rate hz 300 dBm Offset 0 FSK modulating freq hz 1 Time freql selected 50 External STRRT External OOK FSK Output M Frequency 1 hz N Frequency 2 hz Arbitrary modulation 0 dBm Base dBm Offset Delta Freq hz Ramp Rate hz FSK modulating freq hz freql selected Select from above lt ESC gt to previous screen Figure 8 Edit Parameters menu Hit ESC to return to the main Edit Parameters menu and configure all other applicable parameters such as frequency output power etc External Controls The Edit Parameters menu also allows you to enable the external controls where applicable See the External Controls section for a description of the external control connector Note The Arbitrary Modulation selection enables you to upload a file containing a user defined modulation pattern See the Arbitrary Modulations and Arbitrary Waveforms chapter below for information on creating an Arbitrary Modulation file SF800 USER MANUAL Note Entering a frequency value greater than the maximum supported will be flagged as an error or automatically reset to the highest valid value SF800 Software Loop Waveform FSK Ramped running Output A C External START DISABLED Frequency 1 hz 5 000 000 External OOK FSK DISABLED Frequency 2 hz 110 000 000 Arbitrary modulation DISABLED Delta Freq hz 1 000 Bm Base 11 Ramp Rate hz 3
10. Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figures Front Panel Rear Panel Main Menu of the Wave Manager software Waveform Creation Menu Select New Waveform menu Edit Parameters menu Output selection menu Edit Parameters menu Running the new waveform Modify Active Waveform Menu Modify Power Setting AC Coupled Output Driver Differential Output Driver Digital Output Driver FSK Unramped Modulation FSK Ramped Modulation FSK Triangle Modulation Example of FSK Arbitrary waveform Sample FSK Arbitrary Text File Sample Square AM Waveform Example of Sine AM Waveform Example of an Arbitrary Modulation file Enable Arbitrary Waveform option Upload Arbitrary Waveform File Auxiliary UART Usage External Control Pin Filter FSK Control Pin Operation External Control Header on SF800 Front Panel 11 11 12 13 13 16 16 17 18 18 19 20 22 23 23 24 26 27 28 Table of Tables Table 1 Operating Ranges Table 2 Sine AM Samples per Cycle Table Table 3 Arbitrary Waveform maximum sample rate table Table 4 Digital Descriptor Definitions Table 5 External Control Header 14 20 21 22 26 SF800 USER MANUAL Introduction The Signal Forge 800 Digitally Synthesiz
11. Under Test should be 5 dBm 7 2 5 dBm In all cases the total power must not exceed the maximum dBm provided by the SF800 SF800 Active Waveform Menu Waveform FSK Triangle running Output A C External START DISABLED Frequency 1 hz 50 000 000 External OOK FSK DISABLED Frequency 2 hz 110 000 000 00 internal DISABLED Delta Freq hz 1 000 dBm Base 11 Ramp Rate hz 300 dBm Offset 1 2 3 Frequency UP by 1 10 100hz Frequency DOWN by 1 10 100hz reg by value itput OFF dBm Base and Offset Auxiliary UART Menu Base 7 lt U gt scrolls up D scrolls down lt ENTER gt accepts lt ESC gt aborts Figure 11 Modify Power Setting 11 SF800 USER MANUAL Output Types The SF800 provides three different output types Coupled Single ended Differential Digital All outputs have a resolution of 1Hz When an output type is selected all other output types are disabled e g when AC Coupled is selected the TTL output is tri stated and the differential output is at 0 MHz AC Coupled Output The output driver of the AC Coupled signal source provides a nominal 50 Ohm output impedance the output driver implementation is described in the drawing below 50 ohms trace x im 4 M p p SMA p CONNECTOR g 1uF MMIC SF800 Figure 12 AC Coupled Output Driver Differential Output The outputs of the
12. ader The SF800 provides ten 2 pin connectors in a header labeled External Control on the front panel These connectors enable you to control several modulation functions such as frequency shift keying FSK or On Off Keying OOK The function assignments are listed below POSITION NAME POSITION bottom row top row 1 Reserved 1 2 DIFF OOK 2 FSK 6 CHIRP Reserved 6 10 Reserved 10 Table 5 External Control Header SF800 Front Panel c Top Row 3 O Bottom Row External Control Figure 26 External Control Header on SF800 Front Panel Connector Descriptions DIFF OOK The differential clock output supports OOK for the frequency range of 50 MHz to 800 MHz usable to 1 GHz This input pin controls the differential output driving this pin low will stop the differential output By default this pin is set to a high state FSK This pin allows the user to shift the frequency output as defined previously using the menu entry This pin is normally high Driving it low enables you to slow the output frequency as required SF800 USER MANUAL TX MOD This is the TX output from the internal Auxiliary UART port The Wave Manager software provides support for this UART port on the Auxiliary UART Menu under the Modify Active Menu entry The user can connect this output using the appropriate filtering interface to the OOK or FSK external control pins of the SF800 and create UART data modulate
13. alb NAISEF URGE Signal Forge 800 Digitally Synthesized Signal Generator User Manual Technical Support Email Support signalforge com Phone 512 275 3733 Contact Information Web www signalforge com Customer Service Email Sales signalforge com Phone 512 275 3733 Fax 512 275 3735 Address Signal Forge LLC 2115 Saratoga Drive Austin TX 78733 Table of Contents INTRODUCTION 1 General FeatureS 1 Applications 1 SPECIFICATIONS 3 GETTING STARTED 5 Power Adapter 5 Connecting the SF800 to Your Computer 5 Front Panel Connections 5 Rear Panel Connections 6 Wave Manager Software 6 Creating a Waveform 7 Running the Waveform 10 Saving Waveforms 10 Modifying Waveforms On The Fly 10 Frequency Step Up Step Down 11 Power Level Attenuation Control 11 OUTPUT TYPES 12 AC Coupled Output 12 Differential Output 12 Digital 13 Operating Limits 13 Ope
14. d Differential External Control Output Output Outputs Figure 1 Front Panel Differential Outputs Two SMA connectors for driving the differential clock output LVPECL compatible 50 MHz to 800 MHz range usable to 1 GHz A C Coupled Output One SMA connector for driving the AC coupled sine wave output with a frequency range of 100 KHz to 800 MHz usable to 1 GHz Digital Output BNC connector Digital voltage levels supported are TTL LVTTL STTL over a frequency range of 1000 Hz to 100 MHz External Control Dual row 10 position header provides 10 two pin connectors for Differential Clock On Off Keying control Frequency Shift Keying FSK control OOK control for AC Coupled output ASK control AC Coupled output Remote START control LED The front panel LED will be turned on solid if the SF800 has powered up correctly If the LED does not turn on then a power error has occurred and the SF800 may not be operational The LED is also turned off during some operations to signify a change of state SF800 USER MANUAL Note At power up all outputs are disabled unless a waveform has been previously saved and programmed to automatically start at power up Rear Panel Connections SIGNAL FORGE 800 Digitally Synthesized Signal Generator www signalforge com NV 10 MHz Clock Figure 2 Rear Panel RS 232 The RS 232 port uses a standard DB 9 serial connector which connects the SF800 to the
15. d waveforms if so desired SE OOK The SF800 supports OOK On Off Keying for the AC Coupled output in frequency range of 1 Hz to 100 MHz only This input pin provides for external control of the output placing this pin low stops the output of the SF800 This pin is normally set to a high state ASK This control pin allows you to modulate the AC Coupled output in order to implement an externally controlled Asynchronous Shift Keying When this pin is driven low the AC coupled output will be attenuated by 16 dB over the full output power when the signal is high START External START is an output control option A high to low transition causes the SF800 to start outputting its preprogrammed frequency This feature is available for the AC Coupled Differential and TTL outputs When waiting for START the front panel LED is OFF until a valid START polarity is received FSK unramped or triangle waveforms with external FSK control do not support the wait for START output is as selected by the FSK external control pin The time from assertion of the START signal to output valid will vary depending on the type of output frequency chosen and modifiers used The user must first measure this time delay and account for it if it will affect the type of operation being performed As described above the SF800 gives you the ability to control the output frequency using external control pins Each one of the control pins has a low pass filter placed at its inp
16. e polarity control to an external modulating device or to the OOK FSK control pins of the same SF800 In this way you can create modulated waveform outputs which are actually encoding UART driven data The diagram below depicts how to configure the UART TX MOD pin to create an ASCII data keyed OOK Waveform 8 Output OOK Pin tA Input External Control 5 Header Optional External Filtering or Control TX_MOD pin Output Figure 25 Auxiliary UART Usage 24 SF800 USER MANUAL Calibration The user has the option to calibrate the SF800 against a known accuracy time base standard at any time The accuracy of the device used to get the frequency determines the accuracy of the SF800 The Calibration entry can be found in the Main Menu and may be performed as follows f 2 Connect the SF800 to a frequency counter Enable a TTL or AC Coupled output with a frequency in the range of 1 MHz to 100 MHz 10 MHz is a common standard but the SF800 does not limit the user to this frequency value Select Calibration from the Main Menu Enter the frequency as indicated by the external frequency counter The difference between these frequencies is used to determine the required calibration Calibration information is stored by the SF800 in non volatile memory loaded at power up and used until the device is calibrated again SF800 USER MANUAL External Control He
17. e Signal Forge 800 may be used IF and RF sections of receivers as well as the mobile bands up to 1 GHz and some telemetry bands Test amplifiers for gains and for the 1 dB compression point Portable bench top and ATE system applications Local Oscillator L O source Programmable clock generator SF800 USER MANUAL Sweep mode of the digital output can be used to test setup and hold of digital systems FSKandfrequency sweep may be used to test FM receivers Can be used as an amateur or commercial RF exciter SF800 USER MANUA L Specifications Frequency Range Frequency Resolution Amplitude Resolution Power Range AC Output Power Output Accuracy AC Output Frequency Drift per hour After warm up Frequency Stability Frequency precision Frequency accuracy Frequency stability Phase Noise 1000 Hz 800 MHz usable to 1 GHz 1Hz 1dB 11 to 7 dBm 2 dB over full frequency and power range 0 0002 96 0 001 Over temperature of range of 15 35 ambient 4ppm based on 2 5ppm TCXO 5ppm calibrated with a 1ppm frequency counter May drift 3ppm in the first year then 1ppm year thereafter 64 dBc Hz 1 KHz Offset 90 dBc Hz 10 KHz 110 dBc Hz 100 KHz Harmonics 2 MHz to 50 50 dBc 50 MHz to 100 50 dBc 100 MHz to 500 2
18. ed Signal Generator is a low cost high performance signal source which combines several key functions into a single unit frequency generation frequency sweep frequency modulation amplitude modulation and arbitrary modulation A convenient dedicated output port tailored for testing digital systems with support for 3 3V TTL 2 5V TTL and 1 8V STTL voltage levels is also provided An integral TCXO oscillator ensures a high level of precision and accuracy A wide stable frequency range with AC coupled single ended differential and digital outputs with selectable TTL voltage levels in a small easy to use package combine to make the Signal Forge 800 SF800 the ideal tool for a full range of RF and digital electronics test and development applications General Features The Signal Forge 800 supports the following features 1000 Hz to 800 MHz output usable to 1GHz Programmable synthesized frequency source FSK AM OOK ASK and arbitrary modulation modes External and internal control of Start FSK OOK and ASK oscillator provides high level of precision and accuracy Low parts count makes it highly reliable as required for ATE systems Easy to learn and operate Microprocessor controlled Output jitter performance 20 ps Pk to Pk Minimal frequency overshoot when changing frequency Small portable package 8 5 x 5 5 x 1 5 Applications The list below shows some of the possible applications where th
19. ed waveform allows you to select two output frequencies which are alternately driven at a preprogrammed rate For internal FSK operation the modulating frequency that determines the rate at which the frequencies change is selected from the Edit Parameters menu The duty cycle menu entry determines the duration that frequencyl is asserted versus frequency2 The alternate frequency selection is determined either by internal timers or by the front panel FSK signal when external control is enabled 15 SF800 USER MANUAL Modulating Frequency Frequency 2 F Frequency 1 Start TIME Figure 15 FSK Unramped Modulation Output types Coupled Differential Digital TTL 3 3V LVTTL 2 5V SVTTL 1 8V Options Externally controlled OOK Externally controlled Start Arbitrary modulation from a user created file FSK Ramped The FSK Ramped waveform varies the output frequency within a specified range The rate of frequency change is determined by the delta frequency the amount that the frequency is changed at each step and the ramp rate at what interval the frequency is changed The direction of frequency change is determined by internal timers or by the front panel FSK signal when external control is enabled For internal FSK operation the modulating frequency and duty cycle determine how long frequency1 and frequency are selected When frequ
20. ency2 is selected the direction of change is towards frequency2 Once frequency2 is reached the frequency will remain there until the internal timer signal selects frequency1 which causes the frequency to ramp towards frequency The user would normally select a modulating frequency and duty cycle such that the ramp has time to complete i e If the FSK signal changes before the ramp is complete then you will not have reached full range See drawing below Modulating Frequency Frequency2 F Ramp Rate amp Delta Freq Frequency 1 1 TIME Figure 16 FSK Ramped Modulation 16 SF800 USER MANUAL Output types AC Coupled Differential Digital TTL 3 3V LVTTL 2 5V SVTTL 1 8V Options Externally controlled OOK Externally controlled Start Arbitrary modulation from a user created file FSK Triangle FSK Triangle is similar to FSK ramped except that ramping from one frequency to the next occurs automatically When an end frequency is reached the direction changes and ramping continues towards the other frequency See drawing below Frequency 2 F Ramp Rate amp Delta Freq Frequency 1 1 TIME Figure 17 FSK Triangle Modulation Output types AC Coupled Differential Digital TTL 3 3V LVTTL 2 5V SVTTL 1 8V Options Externally controlled OOK Externally controlled Start Arbitrary modulation from a user created file
21. equency one else frequency two AM square wave FALSE means output low power else high power Table 4 Digital Descriptor Definitions The following sample file describes how to create a floating point set of data points to control an FSK type or AM sine wave type of output Sample File file sine txt Half Sine wave data points for FSK arbitrary or Sine AM number of points 15 1 0 8 6 4 3 2 10 12 34 6 8 1 0 Figure 22 Example of Arbitrary Modulation file Uploading A Modulation File Once created the Arbitrary Modulation file may be uploaded to the SF800 and optionally saved in its non volatile memory Before uploading the file you must first setup the waveform that will be modulated by your set of arbitrary data points There are two ways to setup the waveform Select either the FSK Arbitrary waveform from the New Waveform Type menu Q ENABLE Arbitrary Waveform from the Edit Parameters menu where applicable Once enabled an Upload Arbitrary Modulation File selection will appear on the Edit Parameters menu SF800 USER MANUAL SF800 Waveform Edit Waveform FSK Unramped Output A C External START DISABLED Frequency 1 hz 000 000 External OOK FSK 1 Frequency 2 hz 000 000 f irbitrary modulation ENABLED Sample rate hz dBm Base 11 dBm Offset 0 Output M External STRRT B Frequency 1 hz External OOK FSK C Frequency 2 hz 0 firbitrary
22. fset fl Single Tone B FSK Unramped C FSK Ramped D FSK Triangle E FSK Rrbitrary F Sweep G Square AM H Sine AM Select from above lt ESC gt to previous screen Figure 5 Select New Waveform menu Hit ESC to return to the main Waveform Creation Menu then select Edit Parameters F800 Waveform Edit Waveform Single Tone Output A C External START DISABLED Frequency 1 hz 1 000 External OOK FSK DISABLED OOK internal DISABLED dBm Base 11 dBm Offset 0 M External STRRT N External OO0K FSK 0 OOK internal P Q A Output B Frequency 1 hz dBm Base dBm Offset Select from above lt ESC gt to previous screen Figure 6 Edit Parameters menu SF800 USER MANUAL Then select Output from the menu to configure the output type from the list displayed SF800 Waveform Edit Waveform Single Tone Output A C External START DISABLED Frequency 1 hz 1 000 External OOK FSK DISABLED OOK internal DISABLED dBm Base 11 dBm Offset Select from above lt ESC gt to previous screen Figure 7 Output selection menu SF800 Waveform Edit Waveform FSK Ramped Output A C External START DISABLED Frequency 1 hz 5 000 000 External OOK FSK DISABLED Frequency 2 hz 110 000 000 Arbitrary modulation DISABLED Delta Freq hz 1 000 d
23. idered FALSE Floating Point Descriptors Floating point descriptors are used in cases such as FSK Arbitrary or Sine AM where the output is in more than two states Up to 512 floating point descriptors are supported Floating point descriptors must be in the range 1 0 to 1 0 and are used to define the amount of deviation to apply at each sample point The output is determined by multiplying the descriptor and deviation then adding the result to the center value 21 SF800 USER MANUAL Creating a Modulation File An Arbitrary Modulation file must comply with the following criteria The file may be created using a text editor or any program that creates an ASCII file line should contain the keyword number of points followed by the number of sample points described e g number of points 22 This may be on any line Sample points separated by spaces commas or tabs Comments may be inserted anywhere in the file starting with any character other than characters used for numbers 0123456789 or matching the keyword number of points When a comment character is recognized the rest of the line is ignored The file must contain at a minimum the number of sample points indicated on the number of points line If you include more samples than specified they will be ignored Digital Descriptors Operation Description OOK FALSE means output is OFF else ON FSK FALSE means output fr
24. ing the software easy to learn and navigate SF800 USER MANUAL SF800 Main Menu Waveform Single Tone running Output A C Frequency 1 hz 1 000 External STRRT External OOK FSK 00K internal DISRBLED dBm Base 11 dBm Offset DISABLED DISABLED Modify active waveform Waveform creation menu Version information B Copy active waveform to creation menu D Turn off outputs F Download firmware A C E G Calibrate frequency Select from above lt ESC gt to previous screen Figure 3 Main Menu of the Wave Manager software Creating a Waveform To configure a new waveform select the Waveform Creation Menu SF800 Waveform Creation Menu Waveform Single Tone Output A C Frequency 1 hz External START External OOK FSK OOK internal DISABLED dBm Base 11 dBm Offset 0 DISABLED 1 000 DISABLED B Validate parameters C New waveform type E Save F Save amp load at powerup A Edit parameters D Run Load Select from above lt ESC gt to previous screen Figure 4 Waveform Creation Menu SF800 USER MANUAL First select New Waveform Type and choose the desired waveform from the list SF800 Waveform Creation Menu Waveform Single Tone Output A C External START DISABLED Frequency 1 hz External OOK FSK DISABLED 00K internal DISABLED dBm Base 11 dBm Of
25. n back to highest using 25 freq X 2 50 0 10 25 25 1 0 Figure 19 Sample FSK Arbitrary Text File Sweep Sweep is similar to the FSK ramped mode of operation except that it allows frequencies to span the full operational range It also allows any delta frequency Sweep allows the user to pause change direction or single step When a sweep range completes it starts over at the first frequency Output types AC Coupled single ended Differential Digital TTL 3 3V LVTTL 2 5V SVTTL 1 8V Options Externally controlled or OOK Externally controlled Start 18 SF800 USER MANUAL Square AM For Square AM the user specifies a single frequency the carrier frequency and two power values The duty cycle may be programmed to a value other than 5096 which will result in the creation of an asymmetrical wave instead of a square wave 50 at the first power value and 5096 at the lower power value The drawing below depicts AM Square Wave operation in this example the modulation is set to 50 Modulating Frequency Square Wave Base Power Alternate Envelope Enter in dBm Power in dBm Figure 20 Sample Square AM Waveform Arbitrary waveform modulation may be used to completely customize an AM type waveform by downloading arbitrary amplitude descriptors from a user generated file Output types AC Coupled Options Externally controlled OOK Externally controlled Start Arbitrary modulati
26. ng connections to the product Do Not Operate Without Cover Do not operate this product with the cover removed Do Not Operate With Suspected Failures f you suspect there is damage to this product have it inspected by qualified service personnel Operate Within Operating Range No not operate this product outside the operating ranges specified on the manual Do not operate in Wet Damp Conditions Do Not Operate in Explosive Atmosphere Keep Product Surfaces Clean and Dry Warranty Signal Forge warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If a product proves defective within the respective period Signal Forge will repair or replacement the product without charge EXCEPT AS PROVIDED HEREIN SIGNAL FORGE MAKES NO WARRANTY OF ANY KIND EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL SIGNAL FORGE BE LIABLE FOR INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES 30 31 SIGNAL FORGE LLC SF800 User Manual v1 0 2005 Signal Forge LLC 2115 Saratoga Drive Austin TX 78733 Phone 512 275 3733 Fax 512 275 3735 www signalforge com 32
27. on from a user created file Sine AM A Sine Wave AM waveform modulates power using a sinusoidal pattern The SF800 outputs a discrete number of power levels as shown in the drawing below The existence of these discrete power steps is normally not an issue since an AM demodulator includes a low pass filter at its output that will remove any high frequency components higher than the maximum modulating frequency 19 SF800 USER MANUAL Modulating Frequency Sine Wave E Approximation Carrier Frequency Base Power Enter in dBm Opposite Envelope Power in dBm Figure 21 Example of Sine AM Waveform Output types AC Coupled Options Externally controlled OOK Externally controlled Start Arbitrary modulation from a user created file The modulating frequency affects the number of sample points that are used to create the waveform as shown in the following table Modulating frequency Samples per cycle 7500 Hz 12 2500 Hz 36 1500 Hz 60 750 Hz 120 500 Hz 180 250 Hz 360 Table 2 Sine AM Samples per Cycle Table The Arbitrary Modulation mode may be used to completely customize an AM waveform by downloading a user generated arbitrary descriptor file In this case each descriptor defines the output power using values of 1 0 to 1 0 where 1 0 is the lowest power and 1 0 is the highest power Note
28. rating 14 WAVEFORMS 15 Single Tone 15 FSK Unramped 15 FSK Ramped 16 FSK Triangle 17 FSK Arbitrary Waveform 17 SWeep 18 Square AM 19 Sine 19 ARBITRARY WAVEFORMS 21 Arbitrary Modulation Operation 21 Waveform Descriptors 21 Digital Descriptors 21 Floating Point Descriptors 21 Creating a Descriptor File 22 Digital Descriptors 22 Sample File 22 Uploading A Modulation File 22 AUXILIARY UART 24 CALIBRATION 25 EXTERNAL CONTROL 26 Connector Descriptions 26 GENERAL SAFETY AND WARRANTY INFORMATION 29 To Avoid Fire or Personal Injury 29 Warranty 29 Table of Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7
29. serial port on your PC The required RS 232 port settings are 8 data bits 1 stop bit and no parity flow control XON XOFF only no hardware handshake pins are implemented The baud rate must be set to 57 600 10 MHz Clock BNC connector that provides a 10 MHz TTL reference signal derived from the internal TCXO timebase Output impedance is approximately 50 O Note The rear BNC connector for the 10 MHz clock is a reference clock input on the SF800E enabling it to be driven by an external standard It is a clock output on the SF800 Power Input for the AC power adapter provided 5 VDC only On Off Power on off button The LED on the front panel will be on solid if the SF800 has powered up correctly If the LED does not turn on then a power error has occurred and the SF800 may not be operational In this case contact technical support for assistance Wave Manager Software Setup configuration and programming is accomplished using Wave Manager the embedded menu driven software included with the SF800 The software uses an external serial console typically a computer monitor as the display device Standard terminal console software such as Windows HyperTerminal may be used as the console At power up the main menu is displayed presenting the current configuration operational status and programming options The menu screens are organized such that only the options allowable for the selected waveform and output type are displayed mak
30. ut except the Start pin The low pass filter has a 3 dB cutoff point of 4800 Hz The input signals must be driven by 3 3V compatible signals Input impedance is 2K ohms The External Control inputs are 5V tolerant and include a certain level of protection as described in the following block diagram 2 3 3V A Diode A Protection Input v Figure 27 External Control Pin Filter 27 SF800 USER MANUAL The Figure below gives an example of external control of a waveform In the example chosen an external signal controls the FSK signal pin of the SF800 FSK Pin 2 Frequency 1 Start TIME Figure 28 FSK Control Pin Operation SF800 USER MANUAL General Safety and Warranty Information Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified service personnel should perform service procedures To Avoid Fire or Personal Injury Use Proper Power Cord Use only the power module provided with this product Connect and Disconnect Properly Do not connect or disconnect external header pin leads while they are connected to a voltage source turn the SF800 and external control logic simultaneously Observe All Terminal Ratings Consult the product manual for ratings information before maki
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