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Signal Forge 1000 User Manual

Digitally synthesized signal generator
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Signal Forge 1000
Digitally Synthesized Signal Generator
User Manual
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Summary of Contents for Signal Forge 1000

  • Page 1 Signal Forge 1000 Digitally Synthesized Signal Generator User Manual …...
  • Page 3 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...

  • Page 4: Table Of Contents

    Table of Contents INTRODUCTION ----------------------------------- 1 SF1000E -------------------------------------------- 32 General Features --------------------------------- 1 Clock Requirements ---------------------- 32 Applications ---------------------------------------- 1 Reconfiguring SF1000E to SF1000 --- 32 SPECIFICATIONS --------------------------------- 3 POWER CONVERSION TABLES------------ 34 CONNECTIONS ------------------------------------ 4 Front Panel Connections ------------------ 4 Rear Panel Connections------------------- 5 GETTING STARTED ------------------------------ 6 Power Adapter------------------------------------- 6...
  • Page 5 Table of Figures Figure 1. Front Panel Figure 2. Rear Panel Figure 3. Wave Manager Main Menu Figure 4. Waveform Creation Menu Figure 5. Select New Waveform Menu Figure 6. Edit Parameters Menu Figure 7. Output Selection Menu Figure 8. Edit Parameters Menu Figure 9.
  • Page 6 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...

  • Page 7: Introduction

    A wide, stable frequency range with AC-coupled, differential, and digital outputs with selectable TTL voltage levels, in a small, 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.
  • Page 8 S F 1 0 0 0 U S E R M A N U A L 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 RF exciter Test low frequency filters (down to 1 Hz)

  • Page 9: Specifications

    1ppm/year thereafter Phase Noise: -50 dBc/Hz @ 10 KHz Offset -73 dBc/Hz @ 100 KHz -90 dBc/Hz @ 1000 KHz Harmonics: 2 MHz to 50 MHz........< -40 dBc 50 MHz to 100 MHz........< -40 dBc 100 MHz to 300 MHz........< -35 dBc 300 MHZ to 500 MHz……………………….<- 20dBc...

  • Page 10: Connections

    S F 1 0 0 0 U S E R M A N U A L External Control Header Input Voltage………………………………… 3.3V (5V Tolerant) Output voltage (TX_MOD pin)……………….5V Note Output ratings at 100 MHz, 0 dBm output power and 25 ºC, unless otherwise specified Note Allow the SF1000 to warm up (TCXO soak) for 1 hour before use to achieve maximum stability.

  • Page 11: Rear Panel Connections

    S F 1 0 0 0 U S E R M A N U A L 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.

  • Page 12: Getting Started

    S F 1 0 0 0 U S E R M A N U A L Chapter Getting Started Power Adapter An AC power adapter is provided. The specifications are: Input 110-240V, 50/60 Hz; Output +15V, 1.3A. The power connector is on the rear panel. Use only the power adapter that came with your SF1000. Connecting the SF1000 to Your Computer 1.

  • Page 13: Creating A Waveform

    S F 1 0 0 0 U S E R M A N U A L Figure 3. Wave Manager Main Menu Creating a Waveform To configure a new waveform, select the Waveform Creation Menu. Figure 4. Waveform Creation Menu...

  • Page 14: Figure 5. Select New Waveform Menu

    S F 1 0 0 0 U S E R M A N U A L First select New Waveform Type and choose the desired waveform from the list. Figure 5. Select New Waveform Menu Hit ESC to return to the main Waveform Creation Menu, then select Edit Parameters. Figure 6.

  • Page 15: Figure 7. Output Selection Menu

    S F 1 0 0 0 U S E R M A N U A L Then select Output from the menu to configure the output type from the list displayed. Figure 7. Output Selection Menu 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.

  • Page 16: Running The Waveform

    S F 1 0 0 0 U S E R M A N U A L Note Entering a frequency value greater than the maximum supported will be flagged as an error or automatically reset to the highest valid value. Figure 9.

  • Page 17: Frequency Step Up, Step Down

    S F 1 0 0 0 U S E R M A N U A L 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).

  • Page 18: Output Types

    S F 1 0 0 0 U S E R M A N U A L Chapter Output Types The SF1000 provides three different output types: AC Coupled, Single-ended Differential Digital All outputs have a resolution of 1Hz. When an output type is selected, all other output types are disabled (e.g. when AC Coupled is selected, the TTL output is tri-stated and the differential output is at 0 MHz).

  • Page 19: Digital Output

    S F 1 0 0 0 U S E R M A N U A L SMA -P 50 Ohms Receiver Device SMA -N 50 Ohms SF1000 = 1.3V Figure 13. Differential Output Driver Digital Output The following block diagram shows the implementation of the programmable TTL output buffer: Enable 22 Ohms OH = 12mA...

  • Page 20: Operating Ranges

    S F 1 0 0 0 U S E R M A N U A L OOK is supported for: AC Coupled output Up to 100 MHz Differential output Full range The duty cycle (ON percentage) 10 to 90% except near the highest modulating frequency Operating Ranges Waveform / Operation...

  • Page 21: Waveforms

    S F 1 0 0 0 U S E R M A N U A L Chapter 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.

  • Page 22: Fsk Ramped

    S F 1 0 0 0 U S E R M A N U A L Modulating Frequency Frequency 2 Frequency 1 Start TIME Figure 15. FSK Unramped Modulation Output types AC Coupled Differential Digital (TTL: 3.3V, LVTTL: 2.5V, SVTTL: 1.8V) Options Externally controlled OOK Externally controlled Start...

  • Page 23: Fsk Triangle

    S F 1 0 0 0 U S E R M A N U A L Output types AC Coupled Differential Digital (TTL: 3.3V, LVTTL: 2.5V, SVTTL: 1.8V) Options Externally controlled OOK Externally controlled Start Arbitrary modulation (from a user created file) FSK Triangle FSK Triangle is similar to FSK ramped, except that ramping from one frequency to the next occurs automatically.

  • Page 24: Ask

    50%. The supported frequency range is 1 Hz to 200 KHz. An external ASK control pin 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, or ON time, from the supported range.

  • Page 25: Sweep

    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...

  • Page 26: Square Am

    S F 1 0 0 0 U S E R M A N U A L 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).

  • Page 27: Figure 22. Example - Sine Am Waveform

    S F 1 0 0 0 U S E R M A N U A L Figure 22. Example - Sine AM Waveform Output types AC Coupled Options Externally controlled OOK Externally controlled Start Arbitrary modulation (from a user created file) The modulating frequency affects the number of sample points that are used to create the waveform as shown in the following table: Modulating frequency...

  • Page 28: Arbitrary Waveforms

    S F 1 0 0 0 U S E R M A N U A L Chapter 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.

  • Page 29: Creating A Modulation File

    S F 1 0 0 0 U S E R M A N U A L 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 “...

  • Page 30: Digital Descriptors

    S F 1 0 0 0 U S E R M A N U A L Digital Descriptors Operation Description FALSE means output is OFF, else ON FALSE means output frequency one, else frequency two AM square wave FALSE means output low power, else high power Table 4.

  • Page 31: Figure 25. Upload Arbitrary Waveform File

    S F 1 0 0 0 U S E R M A N U A L Next select Upload Arbitrary Waveform File and follow the onscreen instructions. Figure 25. Upload Arbitrary Waveform File Note If you wish to save the arbitrary data to non-volatile memory, use the save option before exiting the arbitrary modulation menu.

  • Page 32: Auxiliary Uart

    S F 1 0 0 0 U S E R M A N U A L Chapter 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.

  • Page 33: Calibration

    S F 1 0 0 0 U S E R M A N U A L Chapter Calibration The user has the option to calibrate the SF1000 against a known accuracy time base standard at any time. The accuracy of the device used to get the frequency determines the accuracy of the SF1000. The Calibration entry can be found in the Main Menu and may be performed as follows: 1.

  • Page 34: External Control Connector

    S F 1 0 0 0 U S E R M A N U A L Chapter 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).

  • Page 35: Connector Descriptions

    S F 1 0 0 0 U S E R M A N U A L Connector Descriptions 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.

  • Page 36: Figure 29: Fsk Control Pin Operation

    S F 1 0 0 0 U S E R M A N U A L 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 Frequency 1...

  • Page 37: General Safety And Warranty Information

    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.

  • Page 38: Sf1000E

    3.3V. - Max 0.00V. – Min. 0.65V. - Max Figure 30: FSK Control Pin Operation If you have any questions, please contact Signal Forge Technical Support at: support@signalforge.com 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.

  • Page 39: Figure 31: Sf1000 To Sf1000E Jumper Positions

    Rear of SF800 PCB Power Switch JP 3 Power Connector Connector JP 5 RS-232 Connector...

  • Page 40: Power Conversion Tables

    Power Conversion Tables The Signal Forge 1000 Signal Generator provides a power output range of +7dBm to –9dBm. This range is adjustable in 1dB increments. Units of dBm are decibels relative to 1 mW of power, hence, 0 dBm equals 1 mW.
  • Page 42 S I G N A L F O R G E , L L C SF1000 User Manual v2.03 © 2006 Signal Forge, LLC 2115 Saratoga Drive • Austin TX 78733 Phone 512.275.3733 • Fax 512.275.3735 www.signalforge.com Signal Forge and Signal Forge 1000 are Trademarks of Signal Forge, LLC...

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