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PDG-2515/2520 Operating Manual

Page 20

MNPDG2515-2520R0.doc

© 2004 Directed Energy, Inc.

X10 button once to increment it to 250ns, then rotate the encoder
wheel to increase it to 300ns. At this point, pressing the X10 button
again would increase the delay to 3.00us, pressing it again
increments it to 30.0us, etc.

An additional function is that if it is held while changing ANY
frequency value, after multiplying the value by a factor of ten, if the
encoder is moved it will increase/decrease at a much faster rate.
This makes the switching frequency much quicker and easier.

PW/PRF Button

This is for varying the parameters Frequency and Pulse Width and
toggling between the two settings quickly. If you are in any menu that is
not a CHANNEL MENU, it will flip you immediately to the CHANNEL 1
menu and the FREQUENCY setting.

Out 1, Out 2, Out 3, Out 4

These are the pulse output connectors. The outputs of the PDG-2520
should be connected to the inputs of the receiving instrument or system
using 50 Ohm coaxial cable. For optimal pulse fidelity, these outputs
should be terminated into 50 Ohms.

Sync Out

This is a 5V signal into 1 meg-Ohm or 2.5V signal into 50 Ohms that is
synchronous with the frequency generator trigger. This is designed to
assist the user in triggering when monitoring the output signals with an
oscilloscope, or for use in triggering an external instrument.

Trigger In

T

his is an input signal into 1KOhms used for external Pulse Repetition

Frequency (PRF) triggering. It is designed to allow the user to trigger
multiple PDG-2520 units from a single pulse generator. This allows the
user to create synchronous waveforms from multiple units.

Power LED

I

ndicates that the power switch on the rear of the unit is in the ‘on’ position

and that AC power is applied to the unit.

Front Panel Controls & Connections

AC Power Entry Module

The driver is grounded through the grounding conductor of the AC power
cord. To avoid electrical shock, plug the driver into a properly wired
receptacle before making connection to any input or output connectors.
Use only a power cord that is in good condition.

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Summary of Contents for PDG-2515

Page 1: ...THE PULSE OF THE FUTURE DIRECTED ENERGY INC PDG 2515 2520 Digital Delay and Pulse Generator OPERATING MANUAL www directedenergy com ...

Page 2: ...THE PULSE OF THE FUTURE ...

Page 3: ...n 2 Enter Button 2 Up Arrow Button 2 Down Arrow Button 2 X10 Button 2 PW PRF Button 3 Out 1 and Out 2 3 Sync Out 3 Trigger In 3 Power LED 3 Front Panel Controls Connections 3 AC Power Entry Module 3 Example Setup 4 Product Overview 5 Description 5 Functions Features 5 Specifications 6 Applications 7 Safety 7 Operating Safety Summary 7 Power Source 7 Grounding 7 Cover Removal 7 General Operating Pr...

Page 4: ...ing Guide 17 PDG 2520 Operating Manual 18 Quick Start Guide 18 What s In The Box 18 Unpacking 18 Setup 18 Power Up 18 Front Panel Controls Connections 18 Encoder 18 Output Button 19 Menu Button 19 Enter Button 19 Up Arrow Button 19 Down Arrow Button 19 X10 Button 19 PW PRF Button 20 Out 1 Out 2 Out 3 Out 4 20 Sync Out 20 Trigger In 20 Power LED 20 Front Panel Controls Connections 20 AC Power Entry...

Page 5: ...HE CHANNEL MENU 26 OUTPUT MENU1 26 OUTPUT MENU2 27 THE CONFIGS MENU 28 Operating Modes 28 Timing Diagram 28 Pulse Generator Mode 29 Pulse Count Mode 30 Divide By N Mode 31 Burst Mode 33 Single Shot Mode 33 Troubleshooting Guide 35 Communications and Remote Operation 36 RS232 Operation 36 GPIB Operation 36 Reply 37 The ASCII commands 37 The Command Set 37 Error Set 39 Contact DEI 40 Web 40 Sales Cu...

Page 6: ... Count Mode 14 Figure 6 Example 1 Divide by N Mode 15 Figure 7 Example 2 Divide by N Mode 15 Figure 8 Example Burst Mode 16 Figure 9 Logic Polarity Functional Diagram 28 Figure 10 Timing Diagram 29 Figure 11 Example 1 Pulse Generator Mode 30 Figure 12 Example 2 Pulse Generator Mode with logic 30 Figure 13 Example Pulse Count Mode 31 Figure 14 Example 1 Divide by N Mode 32 Figure 15 Example 2 Divid...

Page 7: ...EM Directed Energy Inc DEI provides information on its products and associated hazards but it assumes no responsibility for the after sale operation and safety practices Users are responsible for reading and understanding all safety precautions listed in this manual prior to operation of the equipment There are no user serviceable parts in this product please contact the factory for service inform...

Page 8: ...s for signs of shipping damage If any damage is noted contact the factory prior to operating the equipment Setup Connect OUT1 and or OUT2 to an appropriate load using 50 Ohm coaxial cable included Plug the AC power cord into the rear power entry module of the PDG 2515 and into an appropriate AC socket Power Up Turn on the PDG 2515 by pressing the power button located above the power entry module i...

Page 9: ...d when varying parameters that have exponents that can change by a power of 10 By pressing the X10 button the user can increment the exponent within its acceptable range This allows the user to quickly set the parameters without having to excessively scroll the encoder wheel The X10 button functions with the following commands Set Pulse Width 1 and 2 Set Delay 1 and 2 Set Frequency Note if depress...

Page 10: ...receiving instrument or system using 50 Ohm coaxial cable For optimal pulse fidelity these outputs should be terminated into 50 Ohms Sync Out This is a 5V signal into 1 meg Ohm or 2 5V signal into 50 Ohms that is synchronous with the frequency generator trigger This is designed to assist the user in triggering when monitoring the output signals with an oscilloscope or for use in triggering an exte...

Page 11: ...ting it will change on the fly Turn off the pulses Press MENU to continue to the settings for CHANNEL 2 Its default is the same as CHANNEL 1 Hitting MENU again will bring up the OUTPUT MENU This menu allows the unit to change pulse modes disable and enable the outputs depending on the pulse mode choose internal or external trigger depending on the pulse mode and choose whether the sync is based of...

Page 12: ... approximately by the equation MAX DC 97 1E 5 FREQ Frequency Resolution Pulse repetition frequency from single shot to continuous pulses from 100 mHz to 3 0 MHz 100mHZ to 1 0 MHz 3 digits 1 0 MHz 2 digits Trigger Sources Internal External Single Shot Pulse Generator Mode Generates pulses at the rate set by the internal frequency generator or by an external trigger Pulse Count Mode Outputs pulses a...

Page 13: ...odes Continuous Single Shot Burst External Trigger Divide By N Pulse Count Rate Single Shot or 100 millihertz to 3MHz Internal Single Shot to 5MHz External Trigger Resolution 3 Digits 1MHz 2 Digits 1MHz Accuracy Continuous Pulse Count Output 2 Modes 25 PPM Accuracy Burst Mode 2 Rate Jitter Continuous Pulse Count Output 2 Modes 1 st Sigma TBD Rate Jitter Burst Mode 1 st Sigma TBD Burst and Pulse Co...

Page 14: ...erating and servicing personnel Specific warnings may be found throughout this manual but may not appear in this summary Power Source The PDG 2515 is designed to operate from a regulated power source To assure proper system operation the input voltage should not vary by more than 10 from the recommended specification The PDG 2515 accepts input voltages from 90VAC to 264VAC at 47Hz to 63Hz A protec...

Page 15: ...ed that the unit is damaged the carrier should be notified immediately Repair problems should be directed to the service department Directed Energy Inc DEI Fort Collins Colorado Telephone 970 493 1901 FAX 970 493 1903 EMAIL deiinfo directedenergy com Initial Inspection Inspect unit for exterior mechanical damage Inspect power input cord and input power module for obvious signs of damage Electrical...

Page 16: ...and will set the value to the nearest minimum exponent value when the maximum value has been reached example 500 kHz will go to 500 mHz This maximum value is set by the internal limitations of the unit and also the pulse settings ie pulse delay and duty cycle In order the change which setting to adjust the up and down arrows will highlight the current setting In the CHANNEL MENU all settings can b...

Page 17: ... off channel 1 or channel 2 This is especially useful in Divide By N mode and pulse count mode Not that in Burst mode the sync is a packet period limited by at most 95 duty cycle regardless of this setting The contrast setting can also be changed in this menu If the contrast is adjusted by using the encoder knob or using the x10 button a will appear at the end of the setting This means that while ...

Page 18: ...will be saved If the user tries to load a configuration that has not been saved yet the unit will send an error message of Not Valid Config and nothing will be loaded If the load or save is successful the active configuration ACTIVE CON X will reflect this with the correct setting Note if any values are changed the active configuration will no longer be valid and will reflect either or a 0 Operati...

Page 19: ...quency on either channel will change the frequency on both channels simultaneously the frequencies are not independent in this mode If externally triggered the rate is set by the external trigger i e one pulse is output each time a rising edge occurs on the TRIGGER input The delay of each of the outputs is relative to the leading edge of the SYNC output in internal frequency generator and single s...

Page 20: ...lse Generator Mode Pulse Count Mode In Pulse Count Mode the PDG 2515 generates a series of pulses the number of which is set by the PULSE CT variables on the respective channel menu When the number of pulses output on an output channel equals the number set the output of that channel is automatically disabled and the output LED will reflect this ...

Page 21: ...lluminate until the pulse series is completed at which time the LED will extinguish Each time the PULSE ON button is pressed the output pulse series will be generated In Internal PRF mode the frequency repetition rate of the pulses are determined by the internal frequency generator If externally triggered the frequency of the pulses is determined by the frequency of the input trigger The delay of ...

Page 22: ...e channel channels will be set back to the default values Figure 6 Example 1 Divide by N Mode Figure 7 Example 2 Divide by N Mode Burst Mode In Burst Mode a set number of pulses the burst packet are output from OUT1 Each burst packet is sent at the packet frequency The burst packet will start ONE period of the burst packet frequency after the rising edge of the packet frequency OUT 2 will ALWAYS o...

Page 23: ...g the timing can be a number of things such as a burst frequency larger than the packet frequency more pulses delays than allowed in a single packet so that timing overlaps etc The timing constraints are left up to the user s configurations so that the unit may be used to it s full potential however the user may want to output a signal that does not violate any timing constraints to receive a corr...

Page 24: ... the delay settings Pulse Delay limits Check the frequency and duty cycle Note that duty cycle of a channel is the addition of the pulse width and the delay settings In external trigger pulse is not stable or consistent with settings Check duty cycle of input trigger signal check that the signal frequency and trigger signal duty cycle are within specification In Burst Mode pulse is not stable or c...

Page 25: ...cables for signs of shipping damage If any damage is noted contact the factory prior to operating the equipment Setup Connect OUTputs to an appropriate load using 50 Ohm coaxial cable included Plug the AC power cord into the rear power entry module of the PDG 2520 and into an appropriate AC socket Power Up Turn on the PDG 2520 by pressing the power button located above the power entry module in th...

Page 26: ...hen varying parameters that have exponents that can change by a power of 10 By pressing the X10 button the user can increment the exponent within its acceptable range This allows the user to quickly set the parameters without having to excessively scroll the encoder wheel The X10 button functions with the following commands Set Pulse Width 1 2 3 and 4 Set Delay 1 2 3 and 4 Set Frequency Note if de...

Page 27: ...the receiving instrument or system using 50 Ohm coaxial cable For optimal pulse fidelity these outputs should be terminated into 50 Ohms Sync Out This is a 5V signal into 1 meg Ohm or 2 5V signal into 50 Ohms that is synchronous with the frequency generator trigger This is designed to assist the user in triggering when monitoring the output signals with an oscilloscope or for use in triggering an ...

Page 28: ...me as CHANNEL 1 Pressing the MENU button twice more will bring the user through to the last channel menu Hitting MENU again will bring up the first output menu OUTPUT MENU1 This menu allows the unit to change pulse modes disable and enable the outputs depending on the pulse mode and choose whether the sync is based off CHANNEL 1 2 3 or 4 Hitting MENU again will bring up the second output menu OUTP...

Page 29: ...y by the equation MAX DC 97 1E 5 FREQ Frequency Resolution Pulse repetition frequency from single shot to continuous pulses from 100 mHz to 3 0 MHz 100mHZ to 1 0 MHz 3 digits 1 0 MHz 2 digits Trigger Sources Internal External Single Shot Pulse Generator Mode Generates pulses at the rate set by the internal frequency generator or by an external trigger Pulse Count Mode Outputs pulses at the rate se...

Page 30: ...gle Shot Burst External Trigger Divide By N Pulse Count Rate Single Shot or 100 millihertz to 3MHz Internal Single Shot to 5MHz External Trigger Resolution 3 Digits 1MHz 2 Digits 1MHz Accuracy Continuous Pulse Count Output 2 Modes 25 PPM Accuracy Burst Mode 2 Rate Jitter Continuous Pulse Count Output 2 Modes 1 st Sigma TBD Rate Jitter Burst Mode 1 st Sigma TBD Burst and Pulse Count Mode 1 to 65 53...

Page 31: ...erating and servicing personnel Specific warnings may be found throughout this manual but may not appear in this summary Power Source The PDG 2520 is designed to operate from a regulated power source To assure proper system operation the input voltage should not vary by more than 10 from the recommended specification The PDG 2520 accepts input voltages from 90VAC to 264VAC at 47Hz to 63Hz A protec...

Page 32: ...ed that the unit is damaged the carrier should be notified immediately Repair problems should be directed to the service department Directed Energy Inc DEI Fort Collins Colorado Telephone 970 493 1901 FAX 970 493 1903 EMAIL deiinfo directedenergy com Initial Inspection Inspect unit for exterior mechanical damage Inspect power input cord and input power module for obvious signs of damage Electrical...

Page 33: ...d will set the value to the nearest minimum exponent value when the maximum value has been reached example 500 kHz will go to 500 mHz This maximum value is set by the internal limitations of the unit and also the pulse settings ie pulse delay and duty cycle In order the change which setting to adjust the up and down arrows will highlight the current setting In the CHANNEL MENU all settings can be ...

Page 34: ...will lock up until it has finished it s pulse count in external mode so the external triggering device must give it AT LEAST as many pulses as is entered If this does not occur the device can be released by switching modes The sync can also be run off any channel when the unit is not in Burst mode Note that in Burst mode the sync is a packet period limited by at most 95 duty cycle regardless of th...

Page 35: ...will be saved If the user tries to load a configuration that has not been saved yet the unit will send an error message of Not Valid Config and nothing will be loaded If the load or save is successful the active configuration ACTIVE CON X will reflect this with the correct setting Note if any values are changed the active configuration will no longer be valid and will reflect either or a 0 Operati...

Page 36: ...quency on either channel will change the frequency on both channels simultaneously the frequencies are not independent in this mode If externally triggered the rate is set by the external trigger i e one pulse is output each time a rising edge occurs on the TRIGGER input The delay of each of the outputs is relative to the leading edge of the SYNC output in internal frequency generator and single s...

Page 37: ...Generator Mode with logic Pulse Count Mode In Pulse Count Mode the PDG 2520 generates a series of pulses the number of which is set by the PULSE CT variables on the respective channel menu When the number of pulses output on an output channel equals the number set the output of that channel is automatically disabled and the output LED will reflect this ...

Page 38: ...e until the pulse series is completed at which time the LED will extinguish Each time the PULSE ON button is pressed the output pulse series will be generated In Internal PRF mode the frequency repetition rate of the pulses are determined by the internal frequency generator If externally triggered the frequency of the pulses is determined by the frequency of the input trigger The delay of each of ...

Page 39: ...y going into a mode that conflicts with these settings the channel channels will be set back to the default values Also be aware that channels 1 and 3 stay synchronized and channels 2 and 4 must have the same value for N The delays and pulse widths on these channels are all independent Figure 14 Example 1 Divide by N Mode Figure 15 Example 2 Divide by N Mode ...

Page 40: ...ursts exceeds the time period of the packet frequency this would violate the hardware of the unit Violating the timing can be a number of things such as a burst frequency larger than the packet frequency more pulses delays than allowed in a single packet so that timing overlaps etc The timing constraints are left up to the user s configurations so that the unit may be used to it s full potential h...

Page 41: ...PDG 2515 2520 Operating Manual Page 34 MNPDG2515 2520R0 doc 2004 Directed Energy Inc Figure 17 Example Single Shot Mode ...

Page 42: ... the delay settings Pulse Delay limits Check the frequency and duty cycle Note that duty cycle of a channel is the addition of the pulse width and the delay settings In external trigger pulse is not stable or consistent with settings Check duty cycle of input trigger signal check that the signal frequency and trigger signal duty cycle are within specification In Burst Mode pulse is not stable or c...

Page 43: ...The string is TERMINATED BY A RETURN r CHARACTER After the unit receives the return character the command will be parsed processed and a reply will be generated so that the next command may be sent Be aware that some commands complete significantly faster than others the load and save configuration command could take up to 400 milliseconds to complete due to the overhead associated with the comman...

Page 44: ...h channel in the unit is distinguished by a CHNx where x is the channel the remote is talking to For example to set the pulse width of channel 2 to 150 us the string sent would be CHN2 PULS WIDT 1 50E 04 The Command Set WORD DATA OPERATION COMMAND CHAN PULS FREQ X XXE XX READ WRITE SET PULSE FREQUENCY BRST FREQ X XXE XX READ WRITE SET BURST FREQUENCY DLAY X XXE XX READ WRITE SET BURST DELAY WIDT X...

Page 45: ... SYNC x READ WRITE SET SYNC TO CHANNEL x SYST CONF LOAD x WRITE LOAD SYSTEM CONFIGURATION x SAVE x WRITE SAVE CONFIGURATION x FIRM VERS N A READ GET FIRMWARE VERSION OF UNIT HDWR VERS N A READ GET HARDWARE VERSION OF UNIT COMM GPIB ADDR x READ WRITE SET GPIB ADDRESS x x 1 30 SERL BAUD 1 READ WRITE SET RS232 BAUD RATE TO 9600 2 SET RS232 BAUD RATE TO 14400 3 SET RS232 BAUD RATE TO 19200 4 SET RS232...

Page 46: ...EQUENCY IS DC LIMITED 66 0x42 PULSEWIDTH IS FREQUENCY LIMITED 67 0x43 DELAY IS FREQUENCY LIMITED 68 0x44 INVALID CONFIGURATION 69 111 0x45 0x6A RESERVED 112 0x70 UNRECOGNIZED WORD 113 0x71 BAD STRING FORMAT 114 0x72 BAD DATA FORMAT 115 0x73 UNRECOGNIZED PARSE ERROR 116 0x74 BAD RESOLUTION 117 119 0x75 0x77 RESERVED 120 0x78 COMMAND NOT AVAILABLE 121 0x79 INTERNAL SYSTEM ERROR 122 255 0x80 0xFF RES...

Page 47: ...bility to provide custom modules and products to fit your volume or OEM application Web Visit our web site at www DirectedEnergy com Also visit these other IXYS companies IXYS www IXYS com Clare www Clare com Micronix www ClareMicronix com Westcode www Westcode com MWT www MWTInc com IXYSRF www IXYSRF com Sales Customer Service Support Phone 970 493 1901 Fax 970 493 1903 Email deiinfo directedener...

Page 48: ...ranty described in the next section of this manual To provide accurate and complete warranty service please contact our technical support team who will help you determine the nature of the problem and ensure that the unit must be returned to DEI You will then be given an RMA number that our team will use to track your unit Warranty service is free of repair or replacement charges Non Warranty Serv...

Page 49: ...to make any changes in the design or construction of its products at any time without incurring any obligation to make any change whatever in units previously delivered DEI s sole obligation and buyer s sole remedies under this agreement shall be limited to a refund of the purchase price or at DEI s sole discretion to the repair or replacement of products in kind that prove to DEI s satisfaction t...

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