User Manual … - Signal Forge
Contents
1. 13 CALIBRATION 14 GENERAL SAFETY AND WARRANTY INFORMATION 15 To Avoid Fire or Personal Injury 15 Warranty 15 Table of Figures Figure 1 1800M Front Panel 4 Figure 2 1800M Output Driver Circuit 4 Figure 3 1800M Rear Panel 4 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 SF1000 USER MANUAL Introduction The Signal Forge 1800M 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 0 GHz to 1 8 GHz General Features RF output 1 0 GHz to 1 8 GHz Output power range of 11 dBm to 7 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 10002. and 1000E Signal Generators SF1000 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 RF exciter Programmable clock generator Receiver calibration SF1000 USER MANUAL Specifications Frequency Range ccecceeceeeeeeeeeeeeeeeeeeeeees 1 0 GHz to 1 8 GHz Frequency Resolution 1Hz Frequency Accuracy 2 sceeeeeeeeeeeeeeeeeeeeeee 0 1 ppm Amplitude Range cccceeeeeeeeneeeee eee enaeneeees 64 mV to 800 mV Amplitude Resolution nen 1 dB Power Range AC coupled Output 11dBm to 7dBm Power Output Accuracy AC Output 2 dB over full frequency and power range Phase Noise 84 dBc Hz 1 KHz Offset 92 dBc Hz 10 KHz 110 dBc Hz 100 KHz Harmonics 1 0 GHZ to 1 8 GHZ nen lt 30 dBc NA 80 dBc S100 0 0 ooococncncoconcnoncncnnononcnnnnnnineninananacnnnnnss 80 dBc Power Requirements 2 2 2 c eeeeeeeeeeeeeeeees 150mA at 15V sourced from the SF1000 Notes 1 Also available is the 2500M Frequency Expansion Module which provides an RF output in the 1 5 GHz to 2 6 GHz frequency band If you need an RF output in other frequency bands please contact Signal Forge Tech Support at support signalforge com or 512 275 3733 x2 2 Output is 40 dBm wh
3. 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 15 SIGNAL FORGE LLC 1800M User Manual v1 01 2115 Saratoga Drive Austin TX 78733 Phone 512 275 3733 Fax 512 275 3735 www signalforge com 2007 Signal Forge LLC Signal Forge and 1800M are trademarks of Signal Forge LLC All rights reserved
4. d 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 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 1800M 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 frequency1 and frequency2 are selected When frequency2 is selected the direction of cha
5. en the device is first powered up To prevent leakage an SMA 50 ohm plug must be attached to the 1800M SMA output connector 3 The SF1000 Signal Generator will drive only one output at a time either the RF output of the 1800M module or one of the internal outputs of the SF1000 RF Digital or Differential SF1000 USER MANUAL Connections 1800M Front Panel DIGNALFEFORGE cansion O AC Coupled Output Figure 1 1800M Front Panel RF AC Coupled Output SMA connector for the AC coupled output with a frequency range of 1 0 GHz to 1 8 GHz The output driver of the 1800M provides a nominal 50 Ohm output impedance The output driver implementation is described in the drawing below 50 ohms trace SMA CONNECTOR MMIC 2500M Figure 2 1800M Output Driver Circuit Rear Panel Control and Power Signal Forge www signalforge com Ref Clock Input support signalforge com Figure 3 1800M Rear Panel SF1000 USER MANUAL Reference Clock Input BNC connector attaches to the Digital output of an SF1000 Signal Generator Control and Power A ribbon cable attaches to the External Control connector 20 pin ribbon cable on the front panel of the SF1000 and provides power as well as control signals To achieve the full 2 GHz output you must connect your SF1000 to the 24V AC power adapter provided with the Frequency Expansion Module The 15V AC power adapter originally provided with the SF1000 enables the Module t
6. formation about using the Wave Manager software Once connected the SF1000 automatically detects the attached module and the Wave Manager main menu will display the current configuration operational status and programming options for the 1800M as well as for the SF 1000 To configure the 1800M select G Operate Attached Module on the main menu Menu Control Select Option G from the main menu of Wave Manager SF1000 HyperTerminal lol xi File Edit View Call Transfer Help Djs 218 sola e SF1000 Main Menu Waveform Single Tone running Output A C Frequency 1 hz 1 600 External Module none External START SABLED External OOK FSK DISABLED 00K internal DISABLED dBm Base lt 9 dBm Offset 0 A Modify active waveform C Waveform creation menu E Download firmware G Operate attached module Select from above B Copy active waveform to creation menu D SF1000 version info F Calibrate frequency lt ESC gt to previous screen_ Connected 0 15 49 Auto detect s76008 N 1 SCROLL CAPS Nom Copa El ZA Figure 5 Main Menu of the Wave Manager software 1800M USER MANUAL Waveforms The 1800M 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 config
7. it 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 Modulating Frequency Frequency 2 4 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 1800M output frequency between two preprogrammed values For applications which require external FSK control of the 1800M 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 1800M USER MANUAL Modulating Frequency Frequency 2 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 1800M USER MANUAL Operating Limits RF AC C
8. nge 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 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 1800M 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 Ed
9. o produce a maximum output of 1 9 GHz SF1000 USER MANUAL Connecting the 1800M The 1800M connects to the BNC connector on the front of your Signal Forge 1000 signal generator as shown in the drawing below SF1000 SF1000E Signal Forge Signal Generator External Control BNC 20 pin Ribbon Cable CPU Interface Frequency Expansion SMA Connector RF Output Figure 4 Connecting the 1800M to the Signal Forge 1000 Signal Generator The following two connections must be made between the Signal Generator and the 1800M 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 1800M 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 1800M connects to the 10 position External Control connector on the front panel of the SF1000 and provides both power and control to the 1800M 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 SF1000 USER MANUAL Operating the 1800M Setup configuration and programming is accomplished using the Wave Manager software embedded in the Signal Forge Signal Generators See the SF1000 User Manual for more in
10. oupled output 1 0 GHz to 1 8 GHz FSK frequency range Full range Internal FSK duty cycle Freg1 direction 10 to 90 External FSK User driven signal 50 KHz maximum Operating Ranges Waveform Operation Range Chirp 1 0 GHz to 1 8 GHz pulse width programmable FSK ramped unramped Modulating frequency 0 1 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 1800M USER MANUAL Calibration 1800M Expansion Module does not require calibration Its accuracy is dependent on the SF1000 Refer to the SF 1000 signal generator User Manual for calibration information 14 1800M 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 SF1000 while the SF1000 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 If you suspect there
11. uency 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 frequency 1 between chirps can be calculated as lt pulse to pulse gt minus lt chirp pulse width gt 1800M 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 SF1000 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 determine
12. ulGNAIS F RGE Signal Forge 1800M Frequency Expansion Module 1 0 GHz to 1 8 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 1 General Features 1 Applications 2 SPECIFICATIONS 3 CONNECTIONS 4 1800M Front Panel 4 Rear Panel 4 CONNECTING THE 1800M 6 OPERATING THE 1800M 7 Menu Control 7 External FSK Control 11 WAVEFORMS 8 Chirp 8 Pulsed Chirp Pulsed FM 8 FSK Arbitrary Waveform 9 FSK Ramped 10 FSK Triangle 10 FSK Unramped 11 Single Tone 12 OPERATING LIMITS 13 Operating Ranges
13. ured 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 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 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 freq
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