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PDG-2520
User Manual
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Directed Electronics PDG-2515, PDG-2520 User Manual

DIRECTED ENERGY, INC.
PDG-2515/2520
Digital Delay and Pulse Generator
OPERATING MANUAL
www.directedenergy.com
THE PULSE OF THE FUTURE
THE PULSE OF THE FUTURE
Table of Contents
Table of Contents...................................................................................................i
List of Figures ......................................................................................................iv
Safety Warning.....................................................................................................v
PDG-2515 Operating Manual ...............................................................................1
Quick Start Guide..................................................................................................1
What’s In The Box?...........................................................................................1
Unpacking......................................................................................................... 1
Setup.................................................................................................................1
Power Up ..........................................................................................................1
Front Panel Controls & Connections.................................................................1
Encoder .........................................................................................................1
Output Button.................................................................................................2
Menu Button ..................................................................................................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 Precautions .....................................................................7
Servicing Safety Summary................................................................................8
PREPARATION FOR USE................................................................................8
General..........................................................................................................8
Initial Inspection.............................................................................................8
Electrical Installation......................................................................................8
Operation..............................................................................................................8
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Operating Tips...................................................................................................8
Power-Up Procedures.......................................................................................9
FRONT PANEL OPERATING INSTRUCTIONS ...............................................9
THE CHANNEL MENU..................................................................................9
THE OUTPUT MENU ....................................................................................9
THE LOGIC MENU......................................................................................10
THE CONFIGS MENU.................................................................................11
Operating Modes.............................................................................................11
Timing Diagram ...........................................................................................11
Pulse Generator Mode.................................................................................12
Pulse Count Mode.......................................................................................13
Divide By N Mode........................................................................................14
Burst Mode ..................................................................................................15
Single Shot Mode ........................................................................................16
Troubleshooting 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 Module ..............................................................................20
Example Setup................................................................................................21
Product Overview................................................................................................22
Description ......................................................................................................22
Functions & Features......................................................................................22
Specifications..................................................................................................23
Applications.....................................................................................................24
Safety .................................................................................................................24
Operating Safety Summary.............................................................................24
Power Source..............................................................................................24
Grounding....................................................................................................24
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Cover Removal............................................................................................24
General Operating Precautions ...................................................................24
Servicing Safety Summary..............................................................................25
PREPARATION FOR USE..............................................................................25
General........................................................................................................25
Initial Inspection...........................................................................................25
Electrical Installation....................................................................................25
Operation............................................................................................................25
Operating Tips.................................................................................................25
Power-Up Procedures.....................................................................................26
FRONT PANEL OPERATING INSTRUCTIONS .............................................26
THE 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 Customer Service & Support.................................................................40
Technical Customer Service & Support...........................................................40
Factory Service & Support..................................................................................41
Product Service...............................................................................................41
Technical Support ...........................................................................................41
Warranty.............................................................................................................42
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List of Figures
Figure 1 Logic & Polarity Functional Diagram.....................................................11
Figure 2 Timing Diagram ....................................................................................12
Figure 3 Example 1: Pulse Generator Mode.......................................................13
Figure 4 Example 2: Pulse Generator Mode.......................................................13
Figure 5 Example: Pulse 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: Divide by N Mode.............................................................32
Figure 16 Example: Burst Mode..........................................................................33
Figure 17 Example: Single Shot Mode................................................................34
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Safety Warning
SAFE OPERATING PROCEDURES AND PROPER USE OF THE EQUIPMENT
ARE THE RESPONSIBILITY OF THE USER OF THIS SYSTEM.
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 information.
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PDG-2515 Operating Manual
Quick Start Guide
This quick-start guide provides a step-by-step guide to manually operating the PDG-2515. Please refer to the appropriate sections of the manual for additional instructions and guidelines. The SAFETY warnings in the manual must be read and understood prior to operating the PDG-2515.
What’s In The Box?
1ea. PDG-2515 Digital Delay & Pulse Generator 1ea. Power Cord 2ea. 50 Ohm Coaxial Output Cable 1ea. Operating Manual
Unpacking
Carefully remove each component listed above. Your PDG-2515 and accessories were inspected at the factory prior to shipment. Inspect the PDG­2515, power cord and output cables 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 in the rear of the unit.
The front panel display will read initialize and display the software and hardware versions internal to the unit on the front panel. After a few moments the unit will finish initialization and the first screen/menu that will appear is the menu for CHANNEL 1. Note: The buttons and encoder on the front panel will have no effect as the unit comes up from initialization.
Front Panel Controls & Connections
Encoder
This is for varying the parameters such as Frequency, Pulse Width, Delay, Trigger Source, etc.
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Output Button
The output button enables/disables the pulse output.
Menu Button
This button is for navigating the PDG-2515 menus.
Enter Button
Used for variables that will be permanently stored in the unit or require setup times internal to the PDG-2515. When a question mark appears after the variable, the enter button will “confirm” or in some cases save that particular setting.
Up Arrow Button
The UP ARROW button allows the user to go up in any particular menu to change selections. If the user is at the top selection it will wrap back around to the bottom selection.
Down Arrow Button
The DOWN ARROW button allows the user to go down in any particular menu to change selections. If the user is at the bottom selection it will wrap back around to the top selection.
X10 Button
The X10 button is used 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 depressed while dialing in frequency it will
increase the frequency at a much higher rate) Set Counters/Bursts/Packets The X10 button is effectively a 10X multiplier. For example, when
setting frequency, the resolution of the encoder wheel is three digits (i.e. 1.00Hz, 10.0Hz, 100Hz, 1.00KHz). Therefore without adjusting the range, the encoder wheel must be turned many times to increase the frequency from 1Hz to 100Hz. However if the frequency is set to 1.00Hz, if the X10 button is pressed once, it changes to 10.0Hz. If it is pressed twice, it changes to 100Hz.
Setting the delay and pulse width is similar to setting frequency. For example, to set the delay to 300ns, set the delay to 25ns, press the
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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 and Out 2
These are the pulse output connectors. The outputs of the PDG-2515 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 This 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-2515 units from a single pulse generator. This allows the user to create synchronous waveforms from multiple units.
Power LED Indicates 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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The PDG-2515 accepts input voltages of 90-264VAC, 47-63Hz.
Example Setup
The default setup is 1 kHz, with zero delay and 100 us pulse on both channels. The pulse in not inverted and the pulse mode is in continuous pulse generation mode which means that pulse count is not available. By pressing the OUTPUT button on the front panel you will see these pulses on the respective outputs.
Turning the encoder with the pulses enabled and the unit will sweep the frequency on the fly, hitting the X10 button will bring you to 10 times the frequency. Pressing the down arrow twice will highlight the pulse width selection. Turn the encoder and the width will sweep. Try this with the polarity setting; 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 off CHANNEL 1 or 2.
Hitting the arrow keys allows the user to decide which settings on the current menu they would like to adjust. Press the up arrow once to scroll around to the bottom of the menu or press the down arrow 5 times. The contrast setting will be highlighted.
Turn the encoder to adjust the contrast. The contrast will adjust “on the fly” and a question mark will appear at the end of the contrast. Hit ENTER and save the contrast saving into the non-volatile memory of the unit, this setting will saved into the unit and keep this in memory even after power-down.
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Product Overview
Description
The PDG-2515 is a two channel digital delay/pulse generator. Each channel offers independently adjustable delay and width, with 25 nanosecond resolution. Up to five user configurations may be stored in internal non-volatile memory, and recalled through the easy to understand front panel.
Functions & Features
Delay And Width and Duty Cycle.
Frequency
Resolution
Trigger Sources Pulse Generator
Mode Pulse Count Mode
Divide By N Mode
Burst Mode
Each channel provides independently adjustable delay and width, with 25ns resolution. The duty cycle is limited based on the frequency. The duty cycle is limited approximately by the equation:
MAX DC = 97-[(1E-5)*FREQ]. 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 Internal, External, Single Shot. Generates pulses at the rate set by the internal
frequency generator, or by an external trigger. Outputs pulses at the rate set by the internal
frequency generator or external trigger and stops after N pulses.
Channel 1 operates in continuous mode, channel 2 pulses every Nth pulse on channel 1.
Generates a burst of pulses, repeating at a frequency.
Counted Burst Mode
Store And Recall
Generates a burst of pulses, and stops after N bursts.
Stores up to 5 user configurations in non-volatile memory.
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Specifications
PARAMETER Value OUTPUTS
Output Channels Two (2) outputs, each with independent digitally controlled delay
and pulse width Delay Range 0 to 99.9 Seconds Pulse Width Range 25 Nanoseconds to 99.9 Seconds Delay And Pulse Width Resolution 25 Nanoseconds below 1 Microsecond
50 Nanoseconds from 1 Microsecond to 10 Microseconds
3 Digits Above 10 Microseconds
ccuracy (Delay and Pulse Width) ±2% Time Base 120MHz Frequency Synthesizer Delay Jitter (1st Sigma) TBD Trigger Delay (External Trigger to SYNC (T0)
Output Internal Throughput Delay (SYNC (T0) To Output 1
Or Output 2 Rising Edge) Output Rise & Fall Times (Into 50Ω) Over/undershoot <5%
mplitude +4V into 50W Output Connectors BNC, Front Panel
INTERNAL RATE GENERATOR
Modes Continuous, Single-Shot, Burst, External Trigger, Divide By N, Rate Single-Shot or 100 millihertz to 3MHz (Internal) Resolution 3 Digits (<1MHz), 2 Digits (>1MHz)
ccuracy (Continuous, Pulse Count, Output-2 Modes)
ccuracy (Burst Mode) ±2% Rate Jitter (Continuous, Pulse Count, Output-2
Modes), 1 Rate Jitter (Burst Mode), 1st Sigma TBD Burst and Pulse Count Mode 2 to 65,535 Pulses per Burst or Count
EXTERNAL TRIGGER INPUT
Type Positive Edge Trigger Input Amplitude Input Impedance Minimum Trigger Pulse Width 25ns Input Trigger Connector BNC, Front Panel
T0 (SYNC) OUTPUT
T0 (Sync) Output Connector BNC, Front Panel
COMPUTER INTERFACE
Interface Type N/A Interface Connector N/A
GENERAL
Internal Non-Volatile Storage 5 Configurations Operating Temperature Range 0°C to +40°C Cooling Requirements Input AC Power 90-264VAC, 47-63Hz, 28W Maximum Dimensions (H X W X D) 3 ½” H x 8” W x 6 1/4” D (8.9cm H x 20.3cm W x 15.9cm D) Weight 2 lbs. (.9kg) Approximate
st
Sigma
75 Nanoseconds <25 Nanoseconds <5 Nanoseconds
Pulse Count Single-Shot to 5MHz (External Trigger)
25 PPM
TBD
TTL into 1KΩ 1KΩ
TTL output into 1 MegΩ, 4.5V into 50Ω
ir cooled
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Applications
The versatile functionality of the PDG-2515 makes it ideal for the needs of numerous applications as a small bench top instrument. The delay resolution and width resolution of each channel allow a unique ability to offset control signals, coupled with ability to logically manipulate the outputs together to form gate signals or specific waveforms make automation of testing and control an easier process.
Safety
Normal use of test equipment exposes the user to a certain amount of danger from electrical shock because testing may be performed with exposed voltages present, dictating the use of caution when operating or servicing this equipment. The following is a summary of general safety precautions that must be observed during all phases of operation and repair of the PDG-2515.
Operating Safety Summary
The safety information contained in this summary is for both operating 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 protective grounding connection by way of the grounding conductor in the AC power cord is essential.
Grounding
The PDG-2515 is grounded through the grounding conductor of the AC power cord. To avoid electrical shock, plug the PDG-2515 into a
properly wired receptacle before making connection to any input or output connectors. Use only a power cord that is in good condition.
Cover Removal To avoid personal injury, do not remove the covers. Do not operate the
PDG-2515 while the covers are removed. Operating the unit with the top
cover removed voids any and all warranties associated with the PDG-
2515.
General Operating Precautions
Do not open the unit while the system is in operation. Use caution when handling or removing the output cables while the unit is operating. Turn off
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equipment when making connections in high voltage or high current circuits. Discharge high voltage capacitors after removing power.
Servicing Safety Summary
DEI strongly recommends that all repairs and adjustments be performed by factory qualified personnel. DEI will not be responsible for personal injury or damage to the pulse generator that occurs during repair by any party other than the factory. Any repairs, adjustments or modifications made by anyone other than authorized DEI personnel voids the factory warranty.
PREPARATION FOR USE
General
After unpacking, initial inspection and electrical installation procedures should be performed to assure that the unit is in good working order. If it is determined 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 Installation
Standard units are shipped ready for use with a nominal 90 - 264 VAC input.
Operation
This section provides basic operating instructions for the PDG-2515 hardware.
Operating Tips
1. The two output channels have synchronized frequencies. Pulse width and pulse delay settings of one channel are dependent on the frequency of the other channel. When changing frequency be aware that both pulse width and delay are within range on both channels.
2. When using the 10X button to increase the rate at which the frequency changes, when it is first depressed the value will change by 10X, further
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