2500M Frequency Expansion Module User Manual
Contents
1. F Frequency 1 Start A TIME Figure 12 FSK Unramped Modulation Options Externally controlled Start Arbitrary modulation from a user created file External FSK Control The following figure depicts the way external FSK control operates the user control source shifts the 2500M output frequency between two preprogrammed values For applications which require external FSK control of the 2500M the standard Control and Power ribbon cable must be replaced To order the replacement cable contact Signal Forge customer service at sales signalforge com or 512 275 3733 x1 11 2500M USER MANUAL Modulating Frequency Frequency z 4 F Frequency 1 f Start __A TIME Figure 6 External FSK Control Operation Single Tone The Single Tone waveform outputs a continuous tone at the user selected output frequency Options Externally controlled Start Note External control requires an external user provided modulating source TTL level 12 2500M USER MANUAL Operating Limits RF AC Coupled output 1 5 GHz to 2 6 GHz FSK frequency range Full range Internal FSK duty cycle Freq1 direction 10 to 90 External FSK User driven signal 50 KHz maximum Operating Ranges Waveform Operation Range Chirp 1 5 GHz to 2 6 GHz pulse width programmable FSK ramped unramped Modulating frequency 0 12. 1000E Signal Generators 2500M USER MANUAL Applications Programmable RF or CW source Local Oscillator L O source Test microwave amplifiers for gain and the 1 dB compression point Testing filter BW using sweep mode FM receiver testing using FSK and frequency sweep RFexciter Programmable clock generator Receiver calibration 2500M USER MANUAL Specifications Frequency Range seceeeeeeeeeeeeees Frequency Resolution Frequency Accuracy occococcncoconconccncnconos Amplitude Range eeceeeeeeeeeeeeeee Amplitude Resolution Power Rango seeno reinen R Power Output Accuracy eenesesnesnennenenenn Phase Noise HARMONICS Srita tdi Non HarMoniCS cccocccncccnnnoncnnnnnncaninanannnananna SPUMOUS urraca prints Power RequirementS ocoococccccccoccnconoos Notes a 1 5 GHz to 2 6 GHz EROE 0 1 ppm ee 64 mV to 800 mV 2500M 21dBm to 9 dBm 2500M HP 13 dBm to 16 dBm 2 dB over full frequency and power range 84 dBc Hz 1 KHz Offset 92 dBc Hz 10 KHz 110 dBc Hz 100 KHz lt 30 dBc 1 There is a gap between the 1 GHz maximum frequency output of the SF10x0 and the 1 5 GHz frequency range of the 2500M If you need a frequency within this gap range select the 2000M Expansion Module which provides an RF output in the 1 GHz to 2 GHz frequency band If you need an RF output in other frequency bands please contact Signal Forge Tech Support at support si
3. 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 10 FSK Ramped Modulation Options 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 10 2500M USER MANUAL Frequency 2 F Ramp Rate amp Delta Freq Frequency 1 4 TIME Figure 11 FSK Triangle Modulation Options Externally controlled Start Arbitrary modulation from a user created file 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 frequency 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 Modulating Frequency Frequency 2 4
4. frequency 1 between chirps can be calculated as lt pulse to pulse gt minus lt chirp pulse width gt 2500M USER MANUAL F2 Frequency F1 TIME Figure 7 Pulsed Chirp Operation Options Externally controlled Start As described in the chirp waveform section 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 SF10x0 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 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 2500 MHz with deviation 10 MHz and descriptor 0 5 will create a frequency of 2495 MHz The file format and number of
5. the front of your Signal Forge 1000 signal generator as shown in the drawing below Signal Forge Signal Generator SF 1000 SF1000E aie 20 pin Ribbon Cable External CPU Control Interface Frequency Expansion SMA Connector RF Output Figure 4 Connecting the 2500M to the Signal Forge 1000 Signal Generator The following two connections must be made between the Signal Generator and the 2500M 1 A BNC to BNC straight plug plug adapter provided connects the Digital Output of the Signal Generator to the BNC connector on the rear of the 2500M Replacements for the BNC adapter may be purchased from Digi Key order part ARFX1070 ND 2 The 10 position Control and Power ribbon cable integrated into the 2500M connects to the 10 position External Control connector on the front panel of the SF10x0 and provides both power and control to the 2500M Note If you wish to use the Frequency Expansion Module with an SF800 Signal Generator contact customer service at sales signalforge com or 512 275 3733 x1 2500M USER MANUAL Operating the 2500M Setup configuration and programming is accomplished using the Wave Manager or EZ Wave software provided with the Signal Generators Once connected the SF10x0 automatically detects the attached module operational status and programming options for the 2500M are display on the screen To configure the 2
6. 500M select G Operate Attached Module on the main menu Wave Manager Menu Control Select Option G from the main menu of Wave Manager SF1000 HyperTerminal AE File Edit View Cal Transfer Help Dl 18 ole El E SF1000 Main Menu Waveform Single Tone running External Module none Output A C External START DISABLED Frequency 1 hz 1 000 External OOK FSK DISABLED 00K internal DISABLED dBm Base 9 dBm Offset 0 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 G Operate attached module Select from above lt ESC gt to previous screen_ Connected 0 15 49 autodetect 576008 1 SCROLL cars NUM Capture Print echo Figure 5 Main Menu of the Wave Manager software 2500M USER MANUAL Waveforms The 2500M supports the following waveform modulation functions 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 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 Ma
7. 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 15 SIGNAL FORGE LLC 2500M User Manual v1 05 2115 Saratoga Drive Austin TX 78733 Phone 512 275 3733 Fax 512 275 3735 www signalforge com 2009 Signal Forge LLC Signal Forge and 2500M are trademarks of Signal Forge LLC All rights reserved
8. Hz to 500 KHz FSK Arbitrary Sample rate 0 1 Hz to 26 KHz Sweep Frequency changes using step time of 10ms to 60s in 1ms increments Table 1 Operating Ranges 13 2500M USER MANUAL Calibration 2500M Expansion Module does not require calibration lts accuracy is dependent on the SF10x0 Refer to the SF10x0 portable signal generator User Manual for calibration information 14 2500M 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 Connect and Disconnect Properly Do not connect or disconnect the Control and Power cable to the SF10x0 while the SF10x0 is turned on 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 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 WetiDamp Conditions Do Not Operate in Explosive Atmosphere Keep Product Surfaces Clean and
9. descriptors supported is described in the Creating Arbitrary Waveforms chapter below The drawing below illustrates how FSK Arbitrary Waveforms operate Frequency TIME Fi 0 5 0 1 25 25 1 Figure 8 Example FSK Arbitrary Waveform The FSK waveform shown above was created from the following text file 2500M USER MANUAL 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 9 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 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 frequency2 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
10. ersonal Injury 15 Warranty 44444444444444440000000 15 Table of Figures Figure 1 2500M Front Panel 4 Figure 2 2500M Output Driver Circuit 4 Figure 3 2500M Rear Panel 5 Figure 5 Main Menu of the Wave Manager software 7 Figure 6 External FSK Control Operation 12 Figure 7 Pulsed Chirp Operation 9 Figure 8 Example FSK Arbitrary Waveform9 Figure 9 Sample FSK Arbitrary Text File10 Figure 10 FSK Ramped Modulation 10 Figure 11 FSK Triangle Modulation 11 Figure 12 FSK Unramped Modulation 11 Table of Tables Table 1 Operating Ranges 13 2500M USER MANUAL Introduction The Signal Forge 2500M Frequency Expansion Module is a frequency multiplier source that attaches to the Signal Forge 1000 Signal Generator and generates an RF AC coupled output in the frequency band of 1 5 GHz to 2 6 GHz Two models are available the 2500M with output power range 21 dBm to 9 dBm and 2500M HP with output power range 13 dBm to 16 dBm General Features RF output 1 5 GHz to 2 6 GHz Output power range of 21 dBm to 9 dBm HP model 13 dBm to 16 dBm 1 Hz resolution Low close in phase noise Excellent stability High frequency accuracy Frequency sweep FSK modulation internally and externally controlled Chirp Connects to and is controlled by the Signal Forge 1000 and
11. gnalforge com or 512 275 3733 x2 2 Output is 40 dBm when the device is first powered up To prevent leakage an SMA 50 ohm plug must be attached to the SF2500M SMA output connector 3 The SF1000 or SF1010 Portable Signal Generators will drive only one output at a time either the RF output of the 2500M module or one of the internal outputs of the SF10x0 RF Digital or Differential 2500M USER MANUAL Connections 2500M Front Panel 5 E N f R F 2500M Frequency Expansion Module O AC Coupled Output Figure 1 2500M Front Panel RF AC Coupled Output SMA connector for the AC coupled output with a frequency range of 1 5 GHz to 2 6 GHz The output driver of the 2500M provides a nominal 50 Ohm output impedance The output driver implementation is described in the drawing below 50 ohms trace O SMA CONNECTOR er j 2500M Figure 2 2500M Output Driver Circuit 2500M USER MANUAL Rear Panel Control and Power Signal Forge www signalforge com Ref Clock Input support signalforge com Figure 3 2500M Rear Panel Reference Clock Input BNC connector attaches to the Digital output of an SF10x0 Signal Generator Control and Power A ribbon cable attaches to the External Control connector 20 pin ribbon cable on the front panel of the SF10x0 and provides power as well as control signals 2500M USER MANUAL Connecting the 2500M The 2500M connects to the BNC connector on
12. nager 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 Options Externally controlled Start Chirp Operation for High Frequencies 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 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 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 time the amount of time at
13. oIGNAI FORGE Signal Forge 2500M Frequency Expansion Module 1 5 GHz to 2 6 GHz User Manual Technical Support Email Support signalforge com Phone 512 275 3733 x2 Contact Information Web www signalforge com Sales and Customer Service Email Sales signalforge com Phone 512 275 3733 x1 Fax 512 275 3735 Address Signal Forge LLC 2115 Saratoga Drive Austin TX 78733 Table of Contents INTRODUCTION mm 1 General Features 1 Applications 2 SPECIFICATIONS 3 CONNECTIONS 4 2500M Front Panel 4 Rear Panel 5 CONNECTING THE 2500M 6 OPERATING THE 2500M 7 Menu Control 7 External FSK Control 11 WAVEFORMS mm 8 Chirp 8 Pulsed Chirp Pulsed FM 8 FSK Arbitrary Waveform 9 FSK Ramped 10 FSK Triangle 10 FSK Unramped 11 Single Tone 2 22 12 OPERATING LIMITS 13 Operating Ranges 13 CALIBRATION nn 14 GENERAL SAFETY AND WARRANTY INFORMATION 15 To Avoid Fire or P
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