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PicoSource PG900 Series User's Guide

1

Copyright © 2016 Pico Technology. All rights reserved.

pg900ug.en r1

1

Introduction

1.1

Overview

The PicoSource PG900 Series instruments are PC-based fast-edge pulse generators
that are fully compatible with USB 2.0 and 3.0 PCs.

The pulse generators are available in three differential output models and offer
extensive control over pulse parameters including amplitude, period, width and
deskew between output channels.

PicoSource PG911:

A two-channel pulse generator based on Step-Recovery Diode
(SRD) technology. It produces two pulses with opposite
polarity, up to 6 V amplitude with 60 ps rise time.

PicoSource PG912:
A two-channel pulse generator based on Tunnel Diode (TD)
technology. It is supplied with small remote tunnel diode
pulse heads that generate positive and negative 200 mV
pulses with 40 ps rise time.

PicoSource PG914:

A four-channel pulse generator based on both SRD and TD
technologies. It can produce two pulses with opposite polarity,
up to 6 V amplitude with 60 ps rise time, and two pulses with
opposite polarity, 200 mV amplitude and 40 ps rise time from
remote tunnel diode pulse heads.

PicoSource Pulse Generators are capable of producing pulses of either polarity with
very fast rise times. The generators will free-run or may be triggered from an external
source, with either positive or negative pulses, at rates of up to 1 MHz. The units are

designed to operate into 50 Ω lines.

The PicoSource instruments can be used as:

general-purpose pulse generators for the testing of semiconductors, components,
networks, electro-optical components etc.
fast rise/fall time step generators which can be used to check the dynamic
response of wide-band oscilloscopes and amplifiers
a stimulus for high-resolution TDR and TDT measurements
a step source for an ultra-wideband impulse forming network

For basic instructions on installing and using your pulse generator, please refer to

to use your pulse generator

or the Quick Start Guide supplied with your instrument.

Features

60 ps rise time at 6 V amplitude (integrated SRD pulse outputs)
40 ps rise time at 200 mV amplitude (tunnel diode pulse outputs)
1 Hz to 1 MHz repetition rate
200 ns to 4 µs pulse width
Continuous, external or manual trigger mode
Differential outputs with deskew
Low-jitter trigger input and output
Storage and carry case
USB 2.0- and 3.0- compatible

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Содержание PicoSource PG900 Series

Страница 1: ...logy All rights reserved User s Guide pg900ug en r1 Pulse Generators PicoSource PG900 Series Distributed by dataTec Ferdinand Lassalle Str 52 72770 Reutlingen Tel 07121 51 50 50 Fax 07121 51 50 10 info datatec de www datatec de ...

Страница 2: ......

Страница 3: ... How to use your pulse generator 12 1 Connection diagrams 12 1 TDR applications 13 2 TDT applications 14 3 TDT and crosstalk 15 2 Free running operation for SRD integrated pulse outputs 16 3 Free running operation for TD outputs 18 4 External trigger operation 19 5 Single trigger operation 20 4 PicoSource PG900 software 21 1 Display area 22 1 Intensified Zone 23 2 Positive and negative pulse outpu...

Страница 4: ...m 41 2 Hardware components for PicoSource PG900 models 42 6 Specifications and characteristics 43 1 PG900 family specifications 43 2 Integrated step recovery diode outputs 44 3 Drive output with tunnel diode pulse heads 45 4 Timing 46 5 External trigger input 47 6 Trigger output 48 7 General 49 7 Declaration of Conformity 50 Index 51 ...

Страница 5: ...and 40 ps rise time from remote tunnel diode pulse heads PicoSource Pulse Generators are capable of producing pulses of either polarity with very fast rise times The generators will free run or may be triggered from an external source with either positive or negative pulses at rates of up to 1 MHz The units are designed to operate into 50 Ω lines The PicoSource instruments can be used as general p...

Страница 6: ...Windows RT and 10 32 bit or 64 bit version Ports USB 2 0 also compatible with USB 3 0 1 3 Safety information To prevent possible electrical shock fire personal injury or damage to the product carefully read this safety information before attempting to install or use the product In addition follow all generally accepted safety practices and procedures for working with and around electricity The pro...

Страница 7: ...ground connection It is not a safety or protective earth Chassis terminal Possibility of electric shock Caution Appearance on the product indicates a need to read these safety instructions Static awareness Static discharge can damage parts Do not dispose of this product as unsorted municipal waste WARNING To prevent injury or death use the product only as instructed and use only accessories suppli...

Страница 8: ...ltage to the integrated pulse outputs or the tunnel diode pulse heads CAUTION Exceeding the overvoltage protection range on any connector can cause permanent damage to the instrument and other connected equipment CAUTION To prevent permanent damage do not apply an input voltage to any of the output channels of the pulse generator 1 3 3 Grounding WARNING The instrument s ground connection through t...

Страница 9: ... the voltage and plug configuration in your country Power supply options and ratings PicoSource model USB connection Ext DC power supply Voltage Current Total power PG900 Series USB 2 0 Compatible with USB 3 0 5 V 1 6 A pk 8 W CAUTION Take care to avoid mechanical stress or tight bend radii for all connected leads including all coaxial leads and connectors Mishandling will cause deformation of sid...

Страница 10: ... accessories contain no user serviceable parts Repair servicing and calibration require specialized test equipment and must only be performed by Pico Technology or an approved service provider There may be a charge for these services unless covered by the Pico two year warranty WARNING To prevent injury or death do not use the product if it appears to be damaged in any way and stop use immediately...

Страница 11: ...chnology equipment or software unless excluded by statute Fitness for purpose As no two applications are the same Pico Technology cannot guarantee that its equipment or software is suitable for a given application It is your responsibility therefore to ensure that the product is suitable for your application Mission critical applications This software is intended for use on a computer that may be ...

Страница 12: ...ranty Pico Technology warrants upon delivery and for a period of 2 years unless otherwise stated from the date of delivery that the Goods will be free from defects in material and workmanship Pico Technology shall not be liable for a breach of the warranty if the defect has been caused by fair wear and tear willful damage negligence abnormal working conditions or failure to follow Pico Technology ...

Страница 13: ...ide AC adaptor 5 V DC at 2 A universal input USB 2 0 cable 1 8 m SMA PC3 5 2 92 wrench Storage and carry case Each signal generator is supplied with additional accessories as shown below Accessories Order number PicoSource model PG911 PG912 PG914 Positive 9040 40 ps TD pulse head Negative 9041 40 ps TD pulse head 12 GHz N f to SMA m adaptor 2 fitted to TD pulse heads TA172 10 GHz 20 dB SMA m f att...

Страница 14: ...rom left to right Positive integrated pulse output SRD Negative integrated pulse output SRD Trigger output Connect to an external unit This connector sends a single ended voltage pulse Trigger input Connect an external signal for external triggering The PicoSource PG912 front panel from left to right Drive 1 output connected to tunnel diode pulse head Drive 2 output connected to tunnel diode pulse...

Страница 15: ...unnel diode pulse head Drive 2 output connected to tunnel diode pulse head Trigger output Connect to an external unit This connector sends a single ended voltage pulse Trigger input Connect an external signal for external triggering The PicoSource rear panel for all models from left to right DC power input Always use with the AC adaptor supplied with the unit USB 2 0 port Use a USB cable to connec...

Страница 16: ...n be connected to an external ground point for example on the system you are testing to provide a ground reference for the signal generator This can help to avoid external noise interfering with your signal integrity Alternatively you can run the laptop using battery power 4 Connect your PicoSource pulse generator to the PC or hub using the USB cable supplied 5 Once you have connected the pulse ge...

Страница 17: ...ope that does not have that function PicoScope 9301 9302 9321 and 9341 Single ended and differential connections for TDR testing using a PicoSource pulse generator with SRD outputs Single ended and differential connections for TDR testing using a PicoSource pulse generator with TD pulse head outputs Connections between the pulse generator and the TD pulse heads PicoSource PG912 and PG914 models on...

Страница 18: ...ain transmission TDT with a PicoScope 9300 sampling oscilloscope without that function PicoScope 9301 9302 9321 and 9341 They also offer the versatility of a remotely placed signal generator for long line or installed system testing when used with any of the PicoScope 9300 models Single ended and differential connections for TDT testing using a PicoSource pulse generator with SRD outputs ...

Страница 19: ...rosstalk PicoSource PG900 pulse generators can be used with a PicoScope 9341 four channel sampling oscilloscope for simultaneous time domain transmission TDT and crosstalk assessment Single ended and differential connections for simultaneous TDT and crosstalk assessment using a PicoSource pulse generator with SRD outputs ...

Страница 20: ...RD generator click Positive Out in the Output menu and then click On 2 Make sure that Period Source is set to Int Clock 3 Make sure the Trigger is set to Continuous 4 Set the Period in the Timing menu to provide the operation rate Set the desired period value from 1 µs to 1 s 1 MHz to 1 Hz 5 Set the Width in the Timing menu Set the desired value from 200 ns to 4 s 6 Set the desired Limit of output...

Страница 21: ... switch on the negative SRD generator click Negative Out in the Output menu and then click On 10 Repeat steps 6 to 8 for the negative output 11 Set the Deskew Set the desired value of delay between outputs within a 2 ns timing range 12 Under Pos Out vs Neg Out select Separate or Paired With Separate Limit and Amplitude controls change separately for positive and negative outputs With Paired both L...

Страница 22: ...that the Period Source is set to Int Clock 3 Make sure that the Trigger is set to Continuous 4 Set the Period in the Timing menu to provide the operation rate Set the desired period value from 1 µs to 1 s 1 MHz to 1 Hz 5 Set the Width in the Timing menu Set the desired width value from 200 ns to 4 s If necessary set the TD Current to Manual 6 Use the Sensitivity control to optimize the current val...

Страница 23: ...t the Ext Trigger from Period Source The External Trigger menu will then open 3 Under Slope select Positive or Negative trigger slope 4 Adjust the Level control from 1 V to 1 V as necessary for stable operation 5 Set necessary Holdoff control from 1 µs to 1 s Trigger holdoff helps to stabilize triggering of the generator When you adjust the Holdoff control the amount of time that the generator wai...

Страница 24: ...lick Single Each click of this button causes a single pulse on each of the pulse generator s active outputs If Ext Trigger is selected under Period Source 1 Connect an external trigger source to the TRIGGER INPUT connector 2 In the Trigger menu click Manual 3 Click Ready Now the generator is armed to respond to any defined trigger signal Each click of this button causes a new arming state of the p...

Страница 25: ...ght 2016 Pico Technology All rights reserved pg900ug en r1 4 PicoSource PG900 software The PicoSource PG900 software interface provides easy access to controls for all of the pulse generator s features and functions Areas of the software interface ...

Страница 26: ...owing zones are features of the Display Area Trigger Output Waveform Positive Output Waveform Negative Output Waveform TD Head1 Output Waveform TD Head2 Output Waveform Vertical Scale for Trigger Output Vertical Scale for Positive and Negative Outputs Vertical Scale for TD Head Outputs Horizontal Scale Intensified Zone ...

Страница 27: ...expanded using the Horizontal Scale control see below 1 All waveforms are shown on a 2 µs div Long Horizontal Scale The Intensified zone section has a 5 µs duration 2 All waveforms are shown on a 50 ns div Middle Horizontal Scale expanded from the Long Horizontal Scale Intensified zone now has a 100 ns duration 3 All waveforms are shown on a 10 ns div Short Horizontal Scale expanded Middle Horizon...

Страница 28: ...ive and negative pulse outputs Positive Output and Negative Output These controls select menus based on SRD technologies for the PicoSource PG911 and PG914 Each menu includes the options outlined below Positive Output left and Negative Output right menus On Click On to turn the selected output on or off ...

Страница 29: ...sitive Output and Negative Output to compensate for different cable delays Set the Deskew between output in the range of 1 00 ns to 1 00 ns Adjustable in a 20 ps coarse increment or in 1 ps fine increment Pulse Performance The transition response can be modified by the Pulse Performance selector Fast provides faster transient times 55 ps or less with near 40 overshot Smooth provides slower transie...

Страница 30: ...utput Thereby it is possible to connect as positive or as negative TD head to any DRIVE output The drive output will provide a positive current and positive drive output for the positive TD head or a negative current and negative drive output for the negative TD head depending on which is detected The recognized polarity of the TD head appears in the menu area under Pos TD Head or Neg TD Head Puls...

Страница 31: ...ument defines peak current automatically Manual the instrument controls peak current manually with the Sensitivity control Use this mode for very fine tuning of TD Sensitivity This controls peak current of TD manually when the Manual is selected from the TD Current Deskew Set the deskew between TD Head 1 Output and TD Head 2 Output to compensate for different cable delays Set the Deskew between ou...

Страница 32: ... automatically Manual the instrument controls peak current manually with the Sensitivity control Use this mode for very fine tuning of TD Sensitivity This controls peak current of TD manually when the Manual is selected from the TD Current Deskew Set the deskew between TD Head 1 Output and TD Head 2 Output to compensate for different cable delays Set the Deskew between output in the range of 0 ps ...

Страница 33: ... MHz Ext Trigger In the External Trigger each active input edge on the TRIGGER INPUT connector triggers a single or countdown output cycle Trigger The Trigger defines how pulses are generated continuously or manually Continuous pulse periods are generated continuously by using internal or external clock source The Manual option can be used to manually run Int Clock Period Source or arm Ext Trigger...

Страница 34: ...lected from the Period Source menu the Timing menu opens Timing Menu Period The pulse cycle time can be set as a period The Frequency value as 1 Period is shown under Period The period value can be set from 1 µs to 1 s adjustable in 1 2 5 10 coarse increments or 200 ns fine increments Guide User Interface showing timing relations ...

Страница 35: ...of the period Duty Cycle value in percents as Width Period is shown under Width control Width value can be set from 200 ns to 4 µs adjustable in 200 ns 500 ns 1 µs 2 µs 4 µs coarse increments or a 25 ns fine increment The following duty cycle limitations apply to Positive Output and Negative Output based on SRD technologies From 2 5 V to 4 V amplitude 50 max From 4 1 V to 6 V amplitude 20 max No d...

Страница 36: ...se an external trigger signal connected to the TRIGGER INPUT as an external trigger source triggered or countdown When the period of the external trigger signal is longer than the selected holdoff time the PicoSource pulse generator generates all outputs and trigger output as a single pulse on every trigger period triggered Timing diagram for external triggered mode 2 µs period of external signal ...

Страница 37: ...s all outputs and trigger output as a single pulse every two or more trigger periods countdown Timing diagram for external countdown mode The image below shows timing relations between different signals They are Delay between external trigger input and trigger output near 4 ns Delay between trigger output and SRD outputs near 40 ns Delay between trigger output and TD Head output near 42 ns Timing ...

Страница 38: ...range of 1 V to 1 V that will be detected by the pulse generator as a valid trigger input pulse Adjustable in coarse increments of 10 mV or fine increments of 1 mV Holdoff Holdoff is a count of a period of time With external trigger it disables the trigger circuit after a given period of time after the last trigger occurred Use holdoff to obtain a stable trigger for HF repetitive composite or comp...

Страница 39: ...the start of the pulse period This positive pulse has a fixed amplitude of near 700 mV a fixed pulse width of near 500 ns and a rise time of less than 400 ps 10 90 This pulse is delayed by approximately 4 ns from the external trigger input It also has a lead time of near 40 ns to the SRD outputs and near 42 ns to the TD Head output Use this signal to pretrigger your sampling oscilloscope ...

Страница 40: ...y scaling menus 4 9 1 Vertical Scale Vertical Scale The Vertical Scale determines how all of the waveforms up to four outputs and the trigger output are displayed vertically by the PicoSource software With Common selected any displayed output waveforms are superimposed on top of each other while the trigger output is displayed separately above the scale as shown below Common Vertical Scale display...

Страница 41: ...ts reserved pg900ug en r1 With Separate selected the two output waveforms that belong to SRD technology the two output waveforms that belong to TD technology and the trigger output are all displayed separately on three vertical scales as shown below Separate Vertical Scale display ...

Страница 42: ...pg900ug en r1 4 9 2 Horizontal Scale Horizontal Scale The Horizontal Scale menu includes three different options With Short selected the horizontal scale is optimized to show the timing relationships between pulse edges on all waveforms as shown below Short Horizontal Scale display ...

Страница 43: ... User s Guide 39 Copyright 2016 Pico Technology All rights reserved pg900ug en r1 With Middle selected the horizontal scale is optimized to show the pulse width of all waveforms as shown below Middle Horizontal Scale display ...

Страница 44: ...ou have unintentionally selected a control you can use the Undo button to return the instrument to the previous settings The Undo function can be repeated up to 100 times Redo If you later decide you didn t want to undo an action right click the button and select Redo 4 11 Main Menu The Main Menu provides access to commands that control all of the instrument features and functions When you select ...

Страница 45: ...2016 Pico Technology All rights reserved pg900ug en r1 5 Theory of operation 5 1 PicoSource PG900 block diagram PicoSource PG900 hardware overall block diagram Green all models Gold PicoSource PG911 and PG914 only Yellow PicoSource PG912 and PG914 only ...

Страница 46: ...iding pulse width control from 0 2 to 4 µs SRD deskew Provides 2 ns p p differential timing deskew between integrated SRD outputs Positive pulse drive Drives positive pulse former of integrated SRD generator Controls output amplitude Negative pulse drive Drives negative pulse former of integrated SRD generator Controls output amplitude Positive pulse former Provides positive SRD output with leadin...

Страница 47: ...guaranteed information about the functions and performance of the instrument Typical Performance where listed is not guaranteed but indicates the performance that most units will exhibit Nominal Value indicates the expected but not guaranteed value of the parameter Factory Calibration Cycle For optimum performance the instrument should have a complete verification of specifications once every 12 m...

Страница 48: ...able in a 100 mV coarse increment 10 mV fine increment Leading edge transition time 10 90 Smooth pulse performance 60 ps or less Overshoot Positive or negative going fast pulse performance 40 or less Pulse aberrations Positive or negative going smooth pulse performance 20 10 or less for the first 2 ns following leading step transition 7 or less over the zone 2 ns to 10 ns following leading step tr...

Страница 49: ...nsition time 10 90 40 ps or less Pulse aberrations 20 or less for the first 2 ns following leading step transition 7 or less over the zone 2 ns to 10 ns following leading step transition 3 or less over the zone 10 ns to 15 ns following leading step transition 2 or less over the zone 15 ns to pulse width 50 ns Trailing edge transition time 10 90 8 ns or less RMS jitter trigger output to output 1 5 ...

Страница 50: ...ger mode Continuous or manual single shot event Internal clock period Range 1 µs to 1 s Resolution 200 ns Accuracy 10 ns 100 ppm of period Pulse width Range From 200 ns to 4 µs Resolution 25 ns Accuracy 50 ns 10 of pulse width RMS Jitter 150 ppm of pulse width or less Delay trigger output to output Tunnel diode outputs N A 42 2 ns fixed With cable included Step recovery diode outputs 48 2 ns fixed...

Страница 51: ...ut to trigger output 2 5 ps typ 3 ps max Trigger slope Selectable rising or falling edge Delay external trigger input to trigger output 4 1 ns Trigger level range 1 V to 1 V Trigger level resolution 1 mV Rise time TBD Maximum safe trigger input voltage 16 dBm or 2 V DC AC pk Trigger nominal input impedance 50 0 5 Ω Trigger coupling DC coupled Trigger input connector SMA f Trigger holdoff Range 1 µ...

Страница 52: ...utput Specifications PicoSource PG911 PG912 and PG914 Waveform Fixed amplitude and timing parameters trigger is leading edge Polarity Positive Amplitude 700 mV or more fixed 50 Ω DC baseline 100 mV or less Pulse width 500 100 ns 50 Ω Transition time 10 90 400 ps or less 50 Ω 20 80 300 ps or less 50 Ω Connector SMA f ...

Страница 53: ... V 5 Universal plug top AC to DC adaptor included Power consumption 1 6 A 8 W max PC connection USB 2 0 FS USB 1 1 and USB 3 0 compatible 1 8 m USB 2 0 lead included Physical characteristics Dimensions Instrument Width 190 mm Height 40 mm Depth 180 mm TD Pulse Heads Width 80 mm Height 28 mm Depth 25 mm Net Weight Instrument 560 g max TD Pulse Heads 125 g max Environmental conditions Operating temp...

Страница 54: ...Declaration of Conformity 50 Copyright 2016 Pico Technology All rights reserved pg900ug en r1 7 Declaration of Conformity ...

Страница 55: ...y 6 I Intensified zone 23 K Kit contents 9 L License conditions 7 M Main menu 40 Memory 2 Microsoft Windows 2 Models 1 O Operating system 2 P PC requirements 2 PicoSource PG900 software 21 Pollution degree 6 Power connection 5 Processor 2 R Ranges maximum 4 Repair 6 S Safety introduction 2 symbols 3 Scaling 36 Servicing 6 Setting up 12 Single trigger 20 Specifications 43 T TDR connections 13 TDT c...

Страница 56: ...h com support picotech com www picotech com Copyright 2016 Pico Technology All rights reserved pg900ug en r1 2016 02 03 United States headquarters Pico Technology 320 N Glenwood Blvd Tyler Texas 75702 United States Tel 1 800 591 2796 Fax 1 620 272 0981 Distributed by dataTec Ferdinand Lassalle Str 52 72770 Reutlingen Tel 07121 51 50 50 Fax 07121 51 50 10 info datatec de www datatec de ...

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