SF1000 User Manual
Contents
1. 28 CALIBRATION 29 EXTERNAL CONTROL CONNECTOR 30 Recommended Cables Connectors 30 Connector Descriptions 31 Table of Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 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 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figures Front Panel Rear Panel Wave Manager Main Menu Waveform Creation Menu Select New Waveform Menu Edit Parameters Menu Output Selection Menu Edit Parameters Menu Running New Waveform Modify Active Waveform Menu Modify Power Setting AC Coupled Output Driver Differential Output Driver Digital Output Driver ASK Operation BPSK Operation Pulsed Chirp Operation Example FSK Arbitrary Waveform Sample FSK Arbitrary Text File FSK Ramped Modulation FSK Triangle Modulation FSK Unramped Modulation Example Sine AM Waveform Example Square AM Waveform Sample Arbitrary Modulation File Enable Arbitrary Waveform Option Upload Arbitrary Waveform File Auxiliary UART Usage External Control Header Pin Locations External Control Pin Filter FSK Control Pin Operation FSK Control Pin Operation SF1000 to SF12. SF1000 Waveform Edit Menu Waveform Single Tone Output TTL 1 8v External STRRT DISRBLED Frequency 1 hz 1 000 External OOK FSK DISABLED Select from above lt ESC gt to previous screen_ Connected 0 19 01 Auto detect 57600 8 N 1 scRoit caes NUM Capture Print echo Figure 7 Output Selection Menu iBixd File Edit View Call Transfer Help Diez 213 soles l SF1000 Waveform Edit Menu Maveform FSK Ramped Output A C External START DISABLED Frequency 1 hz 500 000 External OOK FSK DISRBLED Frequency 2 hz 110 000 000 Arbitrary modulation DISABLED Delta Freq hz 1 000 dBm Base 9 Ramp Rate hz 600 dBm Offset 5 FSK modulating freq hz 1 Time freql selected 50 Output External START Frequency 1 hz External OOK FSK Frequency 2 hz Arbitrary modulation Delta Freq hz dBm Base Ramp Rate hz dBm Offset FSK modulating freq hz Time freql selected Select from above lt ESC gt to previous screen_ Connected 0 07 15 Auto detect 576008 N 1 SCROLL CAPS NUM Capture Print echo 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
3. Reassemble 34 SF1000 USER MANUAL The drawing below shows the location of the jumpers J0 D8UUOD c c Su Jojoeuuo ON8 J0joeuuo5 J MOd Figure 33 SF1000 to SF1000E Jumper Positions 35 Cog cor LI 9d 0001 4S Jo 1289H SF1000 USER MANUAL Power Conversion Tables The Signal Forge 1000 Signal Generator provides a power output range of 7dBm to 13 dBm This range is adjustable in 1dB increments Units of dBm are decibels relative to 1 mW of power hence 0 dBm equals 1 mW 1 100 mW is 20 dBm and 100 mW is 20 dBm Power values less than 1 mW are always negative dBm values and power values greater than 1 mW are always positive The power formulas are listed below P dBm 10 log10 P mW P mW 10 P dBm 10 The table below translates between dBm Volts and Watts within the power range of the SF1000 dBm VoltSams VoltSpeakpeak VOltSpea Watts 500 59mV 1416mv 708mV X 501mW 446 15 mV 1262mv 631mV 13 98 mW 397 04mV 1125mV 562mV 316mW 354 33mV 1002m v 501mV 2 51mW 315 85mV 893mV 447mV 2 00mW 281 550mV 796mV 398mV 1 58mW 250 89mV 710mV 355mV 126mW 223 60 mV 632mV 316mV 1 00mW 199 29mV 564mV 282mV 10 7943 mW 0 177 662mV 502mV 251mV 0 6309 mW 158 30mV 448mV 224mV 0 5011 mW 141 09 mV 399mV 200mvV 03981mW 12574mV 256mV 178mV 03162mW 112 007mV 317mV 158mV 10 2511
4. 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 33 SF1000E Clock Requirements The SF1000E is designed to operate using an external 10 MHz source as its reference clock The external clock should be attached to the BNC connector on the rear panel labeled 10 MHz Clock The SF1000E will not operate without this external reference clock source The 10 MHz external reference input clock must meet the following guidelines 2 6V Min VOH 33V Max 0 00V Min VoL pesy Max ov Figure 32 FSK Control Pin Operation If you have any questions please contact Signal Forge Technical Support at support signalforge com or 512 275 3733 Reconfiguring SF1000E to SF1000 The SF1000E may be converted to an SF1000 by changing internal jumper settings as described below Converting an SF1000E to an SF1000 enables the internal TCXO clock source eliminating need for an external source The conversion requires that the strap on jumpers J3 and J5 be reposition as indicated below J3 J5 Source Used Model 1 2 1 2 Internal TCXO SF1000 2 3 2 3 External 10Mhz SF1000E Table 6 External Control Header Procedure Remove the two rear panel screws Slide the top cover off away from the front panel Change the jumpers as indicated to enable or disable the internal TCXO
5. Select from above lt ESC gt to previous screen_ auto detect 57600 8 N 1 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 100 Hz 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 13 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 SF1000 to drive the output at 7dBm After a cable loss of 2 dBm the output power measured at the Device 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 SF1000 SF1000 HyperTerminal _ 15 xi File Edit View Call Transfe
6. it starts over at the first frequency The SF1000 sweep step size and minimum sweep rate is 5ms for frequencies 100 Mhz or less and 10ms for frequencies over 100 MHz Output types RF Differential a Digital TTL 3 3V LVTTL 2 5V SVTTL 1 8V Options Externally controlled or OOK Externally controlled Start 24 SF1000 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 SF1000 by creating the appropriate arbitrary waveforms The following sections describe how to create upload and save Arbitrary Modulation files to the SF1000 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 BPSK 90 KHz Square AM 80 KHz Sine AM 80 KHz Table 3 Arbitrary Waveform Max 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
7. AC Coupled Output Driver Differential Output The outputs of the 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 The rise and fall times for the differential outputs are 175ps min to 425ps max 20 to 80 measure with a 50ohm load 13 SF1000 USER MANUAL SMA P Figure 13 Differential Output Driver Digital Output The following block diagram shows the implementation of the programmable TTL output buffer The rise and fall times for the rise and fall times for the digital output are 1 2ns 0 7V to 2 0V max Vout Control 1 8V 2 5V 3 3V Figure 14 Digital Output Driver Operating Limits RF output Differential output Digital TTL output o Digital TTL o AC Coupled from 100 KHz to 100 MHz o AC Coupled above 100 MHz o M Differential o The duty cycle Frequency1 direction External OOK FSK User driven signal Internal OOK lon 12mA loL 12mA 100 KHz to 1 GHz 50 MHz to 1 GHz 1Hz 110 MHz Internal Max FSK and CHIRP deviation range is as follows 22 Ohms Receiver Device A ea x 0 T J bS 500hms B H Fa we 3 Pd SMA N 0 O f ra 50 Ohms S d Pd SF1000 TT Any deviation allowed Any deviation allowed 100 200 MHz 200 400 MHz 400 800 MHz 800 MHz 1 GHz 50 100 MH
8. Hz 10 KHz Offset 73 dBc Hz 100 KHz 90 dBc Hz 1000 KHz 20 dBc Hz 10 KHz Offset 60 dBc Hz 100 KHz 90 dBc Hz 1000 KHz SF1000 USER MANUAL Harmonics 2 MHz to 50 MEz 40 dBc 50 MHz to 100 MHz 40 dBc 100 MHz to 3500 MHz 20 dBc 300 MHZ to 500 MHz 20dBc 500 MHz to 1GHz 20 dBc Non Harmonics 100 KHz to 100 MHz 50 dBc 100 MHz to 500 MHz 30 dBc 500 MHz to 1GHz 30 dBc Clock feed through sss 85 dBm Output Match VSWR 1 MHz to 7 MHz 1 5 1 7 dBm output 7 MHz to 1 GHZ innn lt 1 3 1 7dBm output Operating Temperature ssssssssss 0 C to 50 C Operating Power Supply Requirements 10V DC to 15VDC and 600mA to 700mA The AC power adapter included with the SF1000 supplies an output of 15 VDC and 1 3A Note Output ratings at 100 MHz 0 dBm output power and 25 C unless otherwise specified Note For maximum stability allow the SF1000 to warm up TCXO soak for 1 hour before use Connections Front Panel Connections ER SIGNAL FORGE 1000 1 ASK Digitally Synthesized Signal Generator START RE 2 10987654321 N P Digital AC Coupled Differential External Control Output Output Outputs Figure 1
9. Portable bench top and ATE system applications Local Oscillator L O source Receiver calibration FSK and frequency sweep may be used to test FM receivers HF exciter Test low frequency filters down to 1 Hz BPSK may be used for low data rate applications such as IEEE 802 11g wireless LAN standard RFID and Zigbee devices SF1000 USER MANUAL Specifications Frequency Range RF AC coupled Output Digital Output Differential Output Frequency Resolution sssss Frequency Drift per hour After warm up Frequency Stability sss sss Frequency Accuracy Frequency Stability ccceeeeeeeeeeeeeeeeee ees External Control Header Input Voltage sees Output voltage TX MOD pin Operating Voltage Operating Current RF AC Coupled Output Amplitude Range Amplitude Resolution Power Range RF Output Power Output Accuracy RF Output 100 MHz Phase Noise Phase Noise gt 100 MHz 1KHz 1 GHz 1Hz 110 MHz 50 MHz to 1 GHz 1 Hz 0 0002 0 001 Over temperature of range of 15 35 C ambient 4ppm based on 2ppm TCXO 1ppm year after the first year May drift 3ppm in the first year 3 3V 5V Tolerant 5V 10V to 15V 600mA min to 700mA max 50 mVams to 500 mVams 143 mV to 1414 mV 1 dB 13 dBm to 7 dBm 2 dB from 100 KHz to 300 MHz 3 dB from 300MHz to 1 GHz 50 dBc
10. 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 10 SF1000 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 PLIIETIIO 0 n 9 uimiad File Edit View Call Transfer Help Bie 2 3 sols es Software Loop Running Waveform FSK Ramped running Output A C External START DISABLED Frequency 1 hz 500 000 External OOK FSK DISRBLED Frequency 2 hz 110 000 000 Arbitrary modulation DISABLED Delta Freq hz 1 000 dBm Base 9 Ramp Rate hz 600 dBm Offset 0 FSK modulating freq hz 1 Time freql selected 50 press key to abort operation Connected 0 07 32 auto detect 57600 8 N 1 Figure 9 Running 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 sav
11. a change of operational state 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 1000 Digitally Synthesized Signal Generator www signalforge com 15 voc O O VJ e On Off 10 MHz Clock Figure 2 Rear Panel RS 232 The RS 232 port is a female DB 9 serial connector which connects the SF1000 to the 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 Only the TX RX and GND pins of the DB9 connector are implemented on the SF1000 RS 232 cables and USB to RS 232 serial adapters may be purchase from Signal Forge SF1000 USER MANUAL 10 MHz Clock BNC connector that provides a 10 MHz TTL reference output signal derived from the internal TCXO timebase Output impedance is approximately 50 O The accuracy of the 10 MHz output is 0 83 ppm This square wave clock output has 70 30 symmetry Note The rear BNC connector for the 10 MHz clock is a reference clock input on the SF1000E enabling it to be driven by an external standard It is a clock output on the SF 1000 Power Input for the AC power adapter provided The AC adapter provides 15 VDC and 1 3A output The actual operating requirements of the SF1000 are 10V to 15V and 600mA to 700mA
12. 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 frequency and frequency2 are selected When frequency is selected the direction of change is towards frequency2 Once frequency is reached the frequency will remain there until the internal timer signal selects frequency1 which causes the frequency to ramp towards frequency1 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 TIME Figure 20 FSK Ramped Modulation Output types RF Differential Digital TTL 3 3V LVTTL 2 5V SVTTL 1 8V 20 SF1000 USER MANUAL 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
13. edit add macros save macros to a file and load one or multiple macro files using the Append loading option You may enter comment text for each macro and the comment text will be visible when the cursor is over that macro s button This allows you to use short macro names to take up less screen space but see as much description as you desire in the comments Macro Hints When programming for a completely new waveform start the macro with four escape key presses to ensure that you have returned to the main menu window before you begin entering the command sequence for the new waveform This is because most SF1000 menus and operations are exited using the escape key Capture Terminal Window This feature captures the SF1000 screen to a text file The file created is Unicode UTF 8 format If you view the file with a UTF 8 knowledgeable program such as Windows Wordpad the display should look just like it does when displayed by EZ Terminal 39 SF1000 USER MANUAL Free Download EZ Terminal is free for Signal Forge signal generator users To download EZ Terminal go the Products page of the Signal Forge web site http www signalforge com home sf1 multilist 1 SignalForge Products html 40 SF1000 USER MANUAL Product Line Model Number Description SF1000 Signal Forge 1000 Synthesized Signal Generator SF1000E Signal Forge 1000 Synthesized Signal Generator driven by external reference 1800M RF Expansi
14. 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 SF1000 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 input except for the Start pin The low pass filter has a 3 dB cutoff point of 150 KHz The input signals must be driven by 3 3V compatible signals and be referenced to the SF1000 GND any of the GND pins of the 20 pin header Input impedance is 2K ohms 31 SF1000 USER MANUAL The External Control inputs are 5V tolerant and include a certain level of protection as described in the following block diagram Input LPF Diode A Protection bA Figure 30 External Control Pin Filter 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 SF1000 FSK Pin Frequency 2 F Frequency 1 Stat 4 TIME Figure 31 FSK Control Pin Operation 32 SF1000 USER MANUAL General Safety and Warranty Information Review the following safety precautions to avoid injury and prevent damage to this produ
15. 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 ASK Output types RF Options Internal control External control ASK Asynchronous Shift Keying operation is supported in firmware FW revision 3 0 or higher ASK may be controller internally or by an external controller The supported frequency range is 1 Hz to 200 KHz The default symmetry setting is 5096 For external control the ASK control pin on the External Control connector block on the front panel may be used as an arbitrary modulation source to control the output carrier The supported frequency range is 1 Hz to 1000 KHz see drawing below ASK Operation Using the Wave Manager software select the high power value from the supported range The supported range is calculated using an internal output power range table and varies depending on the frequency selected Use the Wave Manager software to determine the supported range at a given frequency 7 dBm is supported for all frequencies and is the recommended setting for ASK operation If lower power output is needed an external attenuator such as the Mini Circuits Inline BW SXW2 Series Precision Fixed Attenuator is recommended The low power value is automatically set to 16dB below the
16. 000E Jumper Positions Voltage Definitions o o c A 10 11 12 12 13 14 14 17 17 19 20 20 20 21 22 23 24 26 27 27 28 30 32 32 34 35 37 Table of Tables Table 1 Operating Ranges Table 2 Sine AM Samples per Cycle Table Table 3 Arbitrary Waveform Max Sample Rate Table 4 Digital Descriptor Definitions Table 5 External Control Header Pinout Table 6 External Control Header Table 7 RF Power Conversion Table Table 8 Signal Forge Product Line 15 23 25 26 30 34 36 41 SF1000 USER MANUAL Introduction The Signal Forge 1000 Digitally Synthesized Signal Generator is a portable high performance signal source and function generator which incorporates three dedicated outputs and numerous waveform modulation functions into a single unit The HF Digital and Differential outputs and 1 GHz range make the Signal Forge 1000 SF1000 ideal for a wide range of test applications from wireless RF receiver calibration to margin testing of integrated circuits Waveform modulation features include AM ASK BPSK Chirp FSK FM Frequency sweep and OOK An integral TCXO oscillator ensures a high level of signal accuracy and stability For applications in which greater accuracy and stability is required a model is available SF1000E which accepts an external 10 MHz clock source The accuracy and stability of the SF1000E is determined by the specifications of the external clock source A wide stable frequency
17. 13 sole ail SF18000 Waveform Edit Menu Waveform FSK Unramped Output A C External START DISABLED Frequency 1 hz 100 000 000 External OOK FSK DISABLED Frequency 2 hz 105 000 000 Arbitrary modulation ENABLED Sample rate hz 500 dBm Base 9 dBm Offset 9 Output External START Frequency 1 hz External OOK FSK Frequency 2 hz Arbitrary modulation Sample rate hz dBm Base Arbitrary modulation edit dBm Offset ENABLE Arbitrary modulation _ lt SPACEBAR gt toggles selection RETURN accepts lt ESC gt aborts Connected 0 12 27 Auto detect 57600 8 N 1 scRou caes NUM Capture Print echo Figure 26 Enable Arbitrary Waveform Option Next select Upload Arbitrary Waveform File and follow the onscreen instructions SS IB Fie Edit View Cal Transfer Help ols al scies es SF1008 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 fregency 1 Select from above lt ESC gt to previous screen Connected 0 12 53 Auto detect s76008 N 1 SCROLL CAPS NUM Capture Print echo Figure 27 Upload Arbitrary Waveform File Note If you wish to save the arbitrary data to non volatile memory use the save option before exiting the a
18. Front Panel SF1000 USER MANUAL Differential Outputs Two SMA connectors for driving the differential clock output LVPECL compatible 50 MHz to 1 GHz RF AC Coupled Output One SMA connector for sourcing the AC coupled unfiltered sine wave output with a frequency range of 100 KHz to 1 GHz The AC coupled output is capacitively connected to the output thus allowing the sine wave output to be floated at any level desired Digital Output BNC connector Digital voltage levels supported are TTL LVTTL STTL over a frequency range of 1 Hz to 110 MHz External Control Dual row 10 position header provides 10 two pin connectors for Frequency Shift Keying FSK control Binary or Bipolar Phase Shift Keying BPSK control Differential Clock On Off Keying OOK control AC coupled OOK control ASK control RF output only Remote START control The recommended connectors for the External Control are 20 pin connector and cable assembly p n M3AAA 2006J ND 2 pin connector housing and contacts for use if not all control signals are needed o 2 position housing p n A26921 ND o Contacts 2 required p n A26951 ND These items may be purchased from www Digi Key com LED The front panel LED will be turned on solid if the SF1000 has powered up correctly If the LED does not turn on then a power error has occurred and the SF1000 may not be operational Note the LED is also turned off during some operations to signify
19. On Off Power on off button The LED on the front panel will be on solid if the SF1000 has powered up correctly If the LED does not turn on then a power error has occurred and the SF1000 may not be operational In this case contact technical support for assistance SF1000 USER MANUAL Getting Started Power Adapter An AC power adapter is provided The specifications are Input 110 240V 50 60 Hz Output 15VDC 1 3A The power connector is on the rear panel Use only the power adapter that came with your SF1000 Note The operating requirements of the SF1000 are 10V to 15V 600mA to 700mA Connecting the SF1000 to Your Computer 1 Connect your PC to the serial port on the SF1000 Serial Port Attach a standard serial port cable with a male DB 9 connector and straight through pin out to the RS 232 port on the rear panel of the SF1000 and the other end to the serial port on your computer Standard serial cables may be purchased many sources including Signal Forge USB To connect your computer to the SF1000 via USB connection use an inline serial port to USB adapter A USB to serial adapter is available from the Signal Forge web site www signalforge com 2 Start and configure your terminal communication software such as the Signal Forge EZ Terminal or HyperTerminal Start EZ Terminal Vista XP W2K HyperTerminal XP W2K XTerm Linux or other serial communication software and configure it as follows 8 data bits 1 stop bit
20. SIGNALI FORGE SIGNAL FORGE 1000 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 nn ile AN VARIANT TORTOR lac ME CE LE To Avoid Fire or Personal Injury 33 SPECIFICATIONS 3 a c aa aaa 99 SF1000E 34 iss pen pane Ne De MEE i Clock Requirements 34 POR ane CONnEcUONS Score ea Reconfiguring SF1000E to SF1000 34 Rear Panel Connections 5 GETTING STARTED anaa 7 POWER CONVERSION TABLES 36 Power Adapter 7 Connecting the SF1000 to Your Computer 7 SOFTWARE UPDATE PROCEDURE Wave Manager Software 7 Creating a Waveform 8 EZ TERMINAL SOFTWARE 39 Running the Waveform 11 Saving Waveforms 11 PRODUCT LINE 41 Modifying Waveforms On The Fly 11 Frequency Step Up Step Down 12 Power Level Attenuation Control dBm Ba
21. a frequency setting above 100 MHz the chirp frequency ramps to F1 instead of jumping to F1 Some frequencies are lost close to F1 due to internal hardware limitations The amount of lost frequency depends on the rate of change from F1 to F2 the frequency difference between F1 and F2 and the internal lock time It is possible to account for lost frequencies near F1 by entering a slightly lower F1 value for a rising chirp or higher F1 value for a falling chirp It is left up to the user to manually compensate for lost frequencies As an example of compensating for lost frequencies assume your SF1000 locks in 500us and you want to chirp 300 MHz to 400 MHz in 4ms This puts you in the operating range of 200 400 MHz Since you are doing the possible frequency range you would expect the lock time in this example to be 250us You need to lower F1 by a value that will represent 250us Step 1 ramp rate is 300 400 MHz in 4ms 100 MHz 4ms 25 MHz ms 25 KHz us Step 2 25 KHz us 250us lock time 6 25 MHz so you need to subtract 6 25 MHz from F1 menu entry F1 293 75 MHz Of course the most accurate method is to use a spectrum analyzer to change F1 until the desired range is seen Pulsed Chirp Pulsed FM The pulsed chirp sometimes referred to as pulsed FM waveform ramps the output from frequency 1 to frequency 2 over a specified time jumps to the starting frequency then idles at frequency 1 until the next chirp A rising or falling chirp
22. al 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 Sine AM A Sine Wave AM waveform modulates power using a sinusoidal pattern The SF1000 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 22 SF1000 USER MANUAL Modulating Frequency Sine Wave L Approximation Carrier Frequency Base Power Enter in dBm Opposite Envelope Power in dBm Figure 23 Example Sine AM Waveform Output types HF 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 downloadi
23. al 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 SF1000 and create UART data modulated waveforms if so desired SE OOK The SF1000 supports OOK On Off Keying for the AC Coupled output in frequency range of 100 KHz to 100 MHz only This input pin provides for external control of the output placing this pin low stops the output of the SF1000 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 Note The ASK control pin is the only control pin that does not have a GND pin as its opposite Any other GND pin on the External Control connector may be used instead START External START is an output control option A high to low transition causes the SF1000 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
24. below POSITION NAME POSITION NAME bottom row top row 1 Reserved 1 Reserved 2 DIFF OOK 2 GND 3 FSK BPSK 3 GND 4 TX MOD 4 GND 5 SE OOK 5 GND 6 Reserved 6 GND 7 15V 7 ASK 8 15V 8 GND 9 START 9 GND 10 Reserved 10 GND SF1000 Front Panel op Row g Pong C L bd Bottom Row External Control Figure 29 External Control Header Pin Locations Recommended Cables Connectors You may attach either a 20 pin connector and cable assembly to a entire External Control block or individual 2 pin assemblies to control a single function The recommended connector are 20 pin connector and cable assembly P N M3AAA 2006J ND 30 SF1000 USER MANUAL 2 pin connector housing and contacts may be used to connect to individual control positions o 2 position housing P N A26921 ND o Contacts 2 required P N A26951 ND Items may be purchased from www Digi Key com External Connector Pin Description DIFF OOK The differential clock output supports OOK for the frequency range of 50 MHz 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 BPSK For FSK waveforms this pin allows the user to shift the frequency output as defined previously For BPSK waveforms this pin selects between phase 1 and phase 2 and as defined previously TX MOD This is the TX output from the intern
25. changes and ramping continues towards the other frequency See drawing below Frequency 2 F Ramp Rate amp Delta Freq Frequency 1 1 TIME Figure 21 FSK Triangle Modulation Output types RF Differential a Digital TTL 3 3V LVTTL 2 5V SVTTL 1 8V Optionsx Externally controlled OOK Externally controlled Start FSK Unramped The Frequency Shift Keying FSK Unramped 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 frequency1 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 21 SF1000 USER MANUAL Modulating Frequency Frequency 2 F Frequency 1 Start TIME Figure 22 FSK Unramped Modulation Output types RF 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 Single Tone The Single Tone waveform outputs a continuous tone at the user selected output frequency Output types RF Differenti
26. ct 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 Adapter 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 SF1000 and external control logic simultaneously Observe All Terminal Ratings Consult the product manual for ratings information before making connections to the product Do Not Operate Without Cover Do not operate this product with the cover removed Do Not Operate With Suspected Failures If 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
27. 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 considered 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 25 SF1000 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 One 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 samp
28. e 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 SF1000 is first turned on This feature enables the SF1000 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 11 SF1000 USER MANUAL PLIIHTIO X U amp Y M ummiag File Edit View Call Transfer Help Dle 2 3 sees es isl SF1000 Active Waveform Menu Waveform FSK Triangle running Output A C External START DISABLED Frequency 1 hz 1 000 External OOK FSK DISABLED Frequency 2 hz 2 000 OOK internal DISRBLED Delta Freq hz 1 000 dBm Base Ramp Rate hz 600 dBm Offset 5 17 Frequency UP by 1 10 1080hz 4 5 61 Frequency DOWN by Louie Pel Frequency by value ID U Output OFF dBm Base and Offset Auxiliary UART Menu
29. hen select Download Firmware from the Wave Manager menu press Y to confirm that you want to perform the download WARNING Pressing Y marks the current firmware invalid so you must download new firmware after this point 4 Anew screen will be displayed that states Application Code Invalid and prompt you to download new firmware by entering D to Download Application Code Do not enter any more key strokes 5 When the message Start PC File Transfer will appear user your mouse to select the File Transfer menu on the main menu bar of the terminal communications software 6 If you are using HyperTerminal select Transfer then Send Text File not the default Send File option NOTE You may have to select All Files in the Files of type pulldown sub menu in order to locate the firmware file since Hyperterminal by default only displays txt files and the SF1000 800 firmware is file type HEX To start the download locate the firmware revision you wish to install and select it with your mouse The screen will display the download status during download and prompt you to rebooth the signal generator when completed Downloading will take a few minutes 38 SF1000 USER MANUAL EZ Terminal Software EZ Terminal is a serial communication software utility for use with the Signal Forge line of signal generators EZ Terminal provides support for macros terminal window screen capture downloading firmware Wave Manage
30. high power value i e 5dBm 16dB 13dBm External ASK Operation ASK may be controlled externally using the External Control header on the front panel 16 SF1000 USER MANUAL Usethe Wave Manager software set ASK control to ENABLED Connect your ASK controller to the top pin at position 7 of the External Control header The bottom pin of location 7 should be left open Use the top pin at location 6 for a GND return connection The input control signal must be 3 3V to 5V the SF800 1000 input is 5V tolerant Proper filtering be applied to the ASK control pin to avoid excessive overshoot or undershoot due to long traces for example The drawing below describes ASK operation AC Coupled Output Carrier ASK External Control Figure 15 ASK Operation BPSK The BPSK binary or bipolar phase shift keying waveform outputs a single frequency that quickly changes between two user selected phase offsets When the phase selection changes to phase 1 the phase jumps by phase 1 When the phase selection changes to phase 2 the phase jumps by phase 2 BPSK is a form of PSK which uses two phases separated by 180 and is sometimes called 2 PSK It modulates at 1bit symbol and is used for testing low data rate applications such as IEEE 802 119 wireless LAN standard BPSK is also suitable for testing low cost passive transmitters such as those used in the RFID standards which have been adopted for biometric passports cred
31. is allowed The pulsed chirp width menu entry specifies the duration of the chirp frequency 1 to frequency 2 The pulse to pulse time menu entry specifies the time between chirps The Wave Manager software automatically calculates the delta frequency and ramp rate for the chirp using up to 50 KHz frequency steps based on the pulse width and frequency range Idle 18 SF1000 USER MANUAL time the amount of time at frequency 1 between chirps can be calculated as lt pulse to pulse gt minus chirp pulse width When using the TTL output or the AC coupled output at a frequency rate of 100 MHz or less there is an option to idle at 0 Hz instead of frequency 1 F2 Frequency F1 TIME Figure 17 Pulsed Chirp Operation Output types RF Differential Digital TTL Options Externally controlled Start Pulsed Chirp Operation for High Frequencies As described in the chirp waveform section when using the differential output at any frequency or the AC coupled output at a frequency above 100 MHz the chirp cannot jump immediately back to frequency F1 There will instead be a ramp back to F1 Since there is an idle time at F1 then F1 will be reached so no frequencies are lost FSK Arbitrary Waveform For FSK Arbitrary Waveforms a user developed file describing a set of frequency variations is uploaded to the SF1000 and optionally saved in internal non volatile memory One arbitrary data set may be saved at a
32. it cards and other applications ZigBee devices which operate in the 868 915 MHz frequency band also employ BPSK Due to synchronization the phase changes are not instantaneous but the user can inspect the timing and adjust the phase values if compensation is desired 360 PHASE TIME Figure 16 BPSK Operation Output types RF to 100 MHz Digital TTL 17 SF1000 USER MANUAL Options nternally controlled Externally controlled BPSK same pin as FSK low selects Phase 1 Externally controlled Start Arbitrary modulation from a user created file Chirp The Chirp waveform ramps the output from frequency 1 to frequency 2 over a specified time then jumps to the starting frequency to begin the next chirp A rising or falling chirp is allowed The pulse width menu entry specifies the duration of the chirp The Wave Manager software automatically calculates the delta frequency and ramp rate for the chirp using up to 50 KHz frequency steps based on the pulse width and frequency range Output types RF Differential Digital TTL Options Externally controlled Start Chirp Operation for High Frequencies When using the TTL output or the AC coupled output with a frequency setting of 100 MHz or less chirp can be configured to immediately jump from F2 frequency 2 to F1 frequency 1 at the end of the chirp ramp When using the differential output any frequency or the AC coupled output at
33. le 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 frequency one else frequency two AM square wave FALSE means output low power else high power BPSK FALSE selects phase 1 else phase 2 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 1 0 1 2 3 4 6 8 1 0 Figure 25 Sample Arbitrary Modulation File Uploading A Modulation File Once created the Arbitrary Modulation file may be uploaded to the SF1000 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 Q 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 26 SF1000 USER MANUAL SF1000 HyperTerminal File Edit View Cal Transfer Help Die 2
34. mW 99 88mV 283mV i4imV 0 1995 mW 89 02mV 252mV 126mV 0 1584mW 79 34mV 224mV 112mV 0 1258mW 70 71mV 200mV 100mV 0 1000mW 63 02mV 178mvV 89mV J 0 0794mW 56 15 mV 159mV 79mV 0 0631uW pm 13 dBm 50 05 mV 143 mV 71mV 0 0501 mW Table 7 RF Power Conversion Table 36 SF1000 USER MANUAL Figure 34 Voltage Definitions SF1000 USER MANUAL Software Update Procedure Wave Manager the embedded operating software firmware of the Signal Forge signal generators may be updated by the user if new revisions become available by following the procedure below Note that all output activity will be suspended while the software update is in process Wave Manager software updates are posted to the Support page of the Signal Forge web site http www signalforge com home sf1 support main html Procedure 1 Download the desired revision The filename format is SF1000 dwn X Y where X is the version and Y the revision 2 Setyour terminal communication program to XON XOFF enabled If using HyperTerminal this selection is made in the Create a New Connection window Go to Port Settings Flow Control and select XON XOFF Note If XON XOFF is not enabled you may receive a buffer error during download and the operation will not be successful EZ Terminal users skip this step since EZ Terminal is automatically configured 3 Connectto the SF1000 or 800 using the terminal communication software t
35. ng 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 Maximum Square AM modulating frequency is 40 KHz Maximum Sine AM modulating Frequency is 6 5 KHz 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 50 which will result in the creation of an asymmetrical wave instead of a square wave 50 at the first power value and 50 at the lower power value The drawing below depicts AM Square Wave operation in this example the modulation is set to 50 23 SF1000 USER MANUAL Modulating Frequency Square Wave Base Power Alternate Envelope Enter in dBm Power in dBm Figure 24 Example 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 HF Options Externally controlled OOK Externally controlled Start Arbitrary modulation from a user created 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
36. no parity flow control XON XOFF baud rate must be set to 57 600 3 Access Wave Manager User Interface Once the serial cable is connected and the serial communication software started and configured turn on the SF1000 and the Wave Manager user interface will load Wave Manager software is installed on the SF1000 so you do NOT need to install any special software on your PC Note If HyperTerminal is started after the SF1000 has been turned on press ESC to refresh the Wave Manager user interface Wave Manager Software Setup configuration and programming is accomplished using Wave Manager the menu driven software which comes pre installed on the SF1000 No client side software is required Standard serial terminal communication software on your PC is all that is required to load the Wave Manager software Simply connect a serial cable between your PC and the SF1000 start the terminal communication software i e EZ Terminal turn on the SF1000 and Wave Manager loads automatically SF1000 USER MANUAL 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 making the software easy to learn and navigate File Edit View Cal Transfer Help ng 2 3 sog ee SF1000 Main Menu Waveform Single Tone running External Module n
37. odulation depth modulation frequency and output level are not adjustable The output level may be adjusted using external amplifiers or attenuators Procedure Calibration should take place in an environment in which the temperature is the same as the temperature at which the unit will be used Note If you have an E model either attach an external clock source or reconfigure it so that the internal clock source is enabled Power up the SF1000 for 1 hour prior to calibration to allow for temperature soak Connect the SF1000 to an accurate frequency counter Use the Wave Manager software to select the TTL or the AC coupled output Set the frequency to 1 MHz 10 MHz or 100 MHz 10 MHz is used at the factory for initial calibration Select Calibration from the Main Menu Oak wo LD Enter the frequency displayed on the external frequency counter into the space provided on the calibration menu The difference between frequency counter reading and the frequency setting is used to calibrate the device The calibration information is stored in non volatile memory loaded at power up and used until the device is calibrated again 29 SF1000 USER MANUAL External Control Connector The SF1000 provides ten 2 pin connectors 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
38. on Module 950 MHz to 1 8 GHz Frequency Band Add on to the SF1000 1000E signal generator 2500M RF Expansion Module 1 5 GHz to 2 6 GHz Frequency Band Add on to the SF1000 1000E signal generator EZTerminal EZ Terminal Serial Communication Software for Vista XP W2K Free download for Signal Forge users SF BRK 1U Rack Mount Bracket Holds 3 SF800 1000 s and attaches to a standard 19 chassis Cable 6 Serial Cable DB9 Male to DB9 Female 6Ft USB Adapter USB 2 0 to DB9 Serial converter with 2 5ft cable Plug and play USB Type A male to D 9 male Table 8 Signal Forge Product Line Ordering Information For a complete description pricing and ordering information visit the Product page of the Signal Forge web site www signalforge com 41 SIGNAL FORGE LLC SF1000 User Manual v3 06 2115 Saratoga Drive Austin TX 78733 Phone 512 275 3733 Fax 512 275 3735 www signalforge com 2005 2007 Signal Forge LLC Signal Forge and Signal Forge 1000 are Trademarks of Signal Forge LLC All rights reserved
39. one Output A C External START DISABLED Frequency 1 hz 1 000 External OOK FSK DISABLED 00K internal DISRBLED dBm Base 9 dBm Offset 9 A Modify active waveform B Copy active waveform to creation menu C Waveform creation menu D SF1000 version info E Download firmware F Calibrate frequency 6 Operate attached module Select from above lt ESC gt to previous screen Connected 0 15 45 Auto detect 576008 N 1 SCROLL CAPS NUM Capture Print echo Figure 3 Wave Manager Main Menu Creating a Waveform To configure a new waveform select the Waveform Creation Menu SF1000 HyperTerminal Oo x File Edit View Call Transfer Help Digg 218 soles El SF1000 Waveform Creation Menu Waveform Single Tone Output A C External START DISABLED Frequency 1 hz 1 000 External OOK FSK DISRBLED 00K internal DISRBLED dBm Base 9 dBm Offset Lj A Edit parameters B Validate parameters C New waveform type 6 ur E Save Save amp load at powerup oa Select from above lt ESC gt to previous screen Connected 0 16 27 Auto detect 576008 N 1 SCROLL CAPS NUM Capture Printecho Figure 4 Waveform Creation Menu SF1000 USER MANUAL First select New Waveform Type and choose the desired waveform from the list SF1000 HyperTerminal File Edit View Cal Transfer Help Digg 28
40. r software for the SF1000 and downloading arbitrary waveform descriptor files Operating Systems Supported Windows Vista Win XP and Win 2000 EZ Terminal is easy to install and use and there is practically no learning curve It is pre configured baud rate COM port etc to operate with Signal Forge products Features Download Firmware This menu selection allows the user to load a new version of the Wave Manager software user interface and operating firmware into the SF1000 signal generator To download firmware 1 Firstinvoke the Download firmware command from SF1000 Wave Manager Main Menu and follow the on screen instructions 2 When Wave Manager prompts you to begin the download go to EZ Terminal menu File gt Download Firmware Find the firmware file hex to be downloaded on your disk select it and the download will start The firmware file will be named similar to SF1000B dwn 5 6 hex Download Arbitrary Data File Allows you to upload an arbitrary data file to the SF1000 see the FSK Arbitrary Waveform section above The procedure is similar to downloading firmware Start by go to the Wave Manager Edit Parameters submenu select Custom Mode Edit When prompted by the SF1000 to download the file navigate EZ Terminal to File gt Download Arbitrary Data File Macros Macros are used to store and replay waveform configurations and test procedures The wise use of macros can be a great time saver You can
41. r Help Dig 28 sole el SF1000 Active Waveform Menu Waveform FSK Triangle running Output A C External START DISABLED Frequency 1 hz k External OOK FSK DISABLED Frequency 2 hz 00K internal DISABLED Delta Freq hz j dBm Base 9 Ramp Rate hz dBm Offset 0 31 61 Frequency UP by 1 10 100hz Frequency DOWN by 1 10 100hz Freauency by value Output OFF dBm Base and Offset Auxiliary UART M enu 7 Base 9 lt U gt scrolls up D scrolls down lt ENTER gt accepts lt ESC gt aborts Auto detect 57600 8 N 1 Figure 11 Modify Power Setting 12 SF1000 USER MANUAL Output Types The SF1000 provides three different output types RF AC Coupled Differential Digital All outputs have a resolution of 1Hz When an output type is selected all other output types are automatically disabled e g when AC Coupled is selected the TTL output is tri stated and the differential output is at 0 MHz RF AC Coupled Output The output driver of the RF AC Coupled signal source provides a nominal 50 Ohm output impedance the output driver implementation is described in the drawing below AC coupled output is capacitively connected to the output allowing the sine wave output to be floated at any level desired 50 ohms trace CU TN ri uF SMA CONNECTOR 1 SF1000 Figure 12
42. range with RF AC coupled differential and digital outputs in a portable easy to use package combine to make the Signal Forge 1000 SF1000 the ideal tool for a full range of RF and digital electronics test and development applications General Features The Signal Forge 1000 supports the following features 1 Hzto 1 GHz frequency range RF AC coupled Digital and Differential outputs Sine wave VV square wave IL FM AM FSK OOK ASK Arbitrary Linear Sweep BPSK and Chirp modulation modes Auxiliary UART for data input to control ASK BPSK FSK and OOK External and internal control of Start ASK BPSK FSK and OOK TCXO oscillator provides high level of signal stability and accuracy Wave Manager software pre installed on SF1000 no client software needed Auto run feature ideal for PC free test operation Small portable package 8 5 x 5 4 x 1 5 SF1000 USER MANUAL Applications The list below shows some of the possible applications where the Signal Forge 1000 may be used Digital output in sweep mode can be used to test setup and hold of digital systems ICs and circuit boards up to 110 MHz Differential output can used to test digital systems ICs and circuit boards up to 1 GHz Programmable clock generator IF and RF sections of receivers as well as the mobile bands up to 1 GHz and some telemetry bands Test amplifiers for gain and for the 1 dB compression point
43. rbitrary modulation menu 27 SF1000 USER MANUAL Auxiliary UART The SF1000 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 SF1000 HW version C also supports 150 300 600 and 1200 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 e polarity control to an external modulating device or to the OOK FSK control pins of the same SF1000 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 cl Ei RH Output OOK Pin J Input External Control j Header Optional Extemal Filtering or Control Figure 28 Auxiliary UART Usage 28 SF1000 USER MANUAL Calibration Calibration Interval The signal generator should be checked 1 year intervals to determine if the carrier frequency needs to be calibrated Be aware that m
44. se and Offset 12 OUTPUT TYPES 13 RF AC Coupled Output 13 Differential Output 13 Digital Output 14 Operating Limits 14 Operating Ranges 15 WAVEFORMS 16 ASK 2 2 onan nooner nnn 16 BPSK 17 Chirp 18 Pulsed Chirp Pulsed FM 18 FSK Arbitrary Waveform 19 FSK Ramped 20 FSK Triangle 21 FSK Unramped 21 Single Tone 22 Sine AM 22 Square AM 23 Sweep 24 ARBITRARY WAVEFORMS 25 Arbitrary Modulation Operation 25 Waveform Descriptors 25 Digital Descriptors 25 Floating Point Descriptors 25 Creating a Modulation File 26 Sample File 26 Uploading A Modulation File 26 AUXILIARY UART
45. soles eil SF1000 Waveform Creation Menu Waveform Single Tone Output A C External START DISABLED Frequency 1 hz 1 000 External OOK FSK DISRBLED 00K internal DISRBLED dBm Base 9 dBm Offset 8 A Single Tone B FSK Unramped C FSK Ramped D FSK Triangle E FSK Arbitrary F Sweep 6 S H Sine AM I ASK internal J ASK external Select from above lt ESC gt to previous screen_ Connected 0 02 31 Auto detect 576008 N 1 SCROLL CAPS NUM Capture Print echo Figure 5 Select New Waveform Menu Hit ESC to return to the main Waveform Creation Menu then select Edit Parameters i E File Edit View Call Transfer Help Dg ala cl e SF1000 Waveform Edit Menu Waveform Single Tone Output A C External START DISABLED Frequency 1 hz 1 000 External OOK FSK DISABLED 00K internal DISABLED dBm Base 9 dBm Offset 8 R Output M External START B Frequency 1 hz N External OOK FSK 0 00K internal P dBm Base Q dBm Offset Select from above lt ESC gt to previous screen Connected 0 17 44 Auto detect 576008 N 1 SCROLL CAPS NUM Capture Print echo Figure 6 Edit Parameters Menu SF1000 USER MANUAL Then select Output from the menu to configure the output type from the list displayed SF1000 HyperTerminal EN o xi File Edit View Call Transfer Help
46. 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 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 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 19 SF1000 USER MANUAL The drawing below illustrates how FSK Arbitrary Waveforms operate Frequency TIME F1 0 5 0 1 25 425 1 Figure 18 Example FSK Arbitrary Waveform The FSK waveform shown above was created from the following text file number_of_points 7 start with highest output frequency for 1 sample times 1 0 go down to center frequency and then back to highest using 25 freq X 2 50 0 10 25 25 1 0 Figure 19 Sample FSK Arbitrary Text File FSK Ramped The FSK Ramped waveform varies the output frequency within a specified range The rate of frequency change is
47. z 400 800 MHz 800 MHz 1 GHz 10 to 90 150 KHz maximum 500 KHz maximum 100 200 MHz 200 400 MHz 14 SF1000 USER MANUAL OOK is supported for o AC Coupled output o Differential output o The duty cycle ON percentage BPSK is supported for o AC Coupled output Up to 100 MHz Full range 10 to 90 except near the highest modulating frequency Up to 100 MHz o Digital TTL Full range o Duty cycle ON percentage 10 to 9096 Operating Ranges 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 Sample Rate 0 1 Hz to 26 KHz Sweep Frequency sweep time Minimum step time for frequencies lt 100 MHz 5ms Minimum step time for frequencies gt 100 MHz 10ms Step time programmable in 5ms and 10ms increments respectively Maximum step time 60 seconds Square AM wave Modulating frequency 0 1 Hz to 45 KHz Sine AM wave Modulating frequency 0 1 Hz to 6 5 KHz BPSK Modulating frequency 0 1 Hz to 500 KHz Table 1 Operating Ranges 15 SF1000 USER MANUAL Waveforms The SF1000 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
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