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DEI PDG-2500 Operating instructions

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PDG-2500
Pulsed Digital Generator
Operation Manual
Directed Energy, Inc.
1609 Oak Ridge Dr., Suite 100, Fort Collins, CO 80525
(970) 493-1901
[email protected]
ixyscolorado.com
Contents
ixyscolorado.com........................................................................................................................................1
Contents........................................................................................................................................................2
Contents........................................................................................................................................................2
Safety............................................................................................................................................................4
QuickStartGuide..........................................................................................................................................5
Safety................................................................................................................................................5
Requirements....................................................................................................................................5
ControllingthePDG‐2500fromthefrontpanel...............................................................................5
ControllingthePDG‐2500fromacomputer.....................................................................................6
Introduction
..................................................................................................................................................7
Description........................................................................................................................................7
PanelLayout......................................................................................................................................9
FrontPanelFeatures.........................................................................................................................9
EndPanelFeatures.........................................................................................................................10
AccessoriesIncluded.......................................................................................................................10
Operation....................................................................................................................................................11
PowerUp.........................................................................................................................................11
SettheFrequency.............................................................................................................................1
SettheDutyCycle.............................................................................................................................
1
SettheAnalogOutput......................................................................................................................2
SettheSingleShot............................................................................................................................2
ViewInformationAboutthePDG‐2500............................................................................................3
ViewtheCommunicationSettings....................................................................................................3
SaveSettings.....................................................................................................................................4
RecallSettings...................................................................................................................................4
PowerDown......................................................................................................................................5
CommandSet................................................................................................................................................1
Specifications................................................................................................................................................4
WarrantyandService....................................................................................................................................7
Warranty...........................................................................................................................................7
FactoryServiceandSupport.............................................................................................................8
Safety
Do not open the cover of PDG-2500. There are no user-serviceable parts inside.
Opening the cover exposes you to shock and voids the factory warranty.
Do not install, handle, or remove the output cables while the PDG-2500 is
operating.
Do not use this device in a manner not specified by the manufacturer.
Do not use where liquids are present or in corrosive environments. Clean this
instrument by wiping with a dry or damp cloth.
Use ONLY NiMH (nickel-metal hydride) batteries.
Quick Start Guide
Safety
Follow the safety guidelines on previous page. DO NOT PROCEED WITHOUT
UNDERSTANDING AND OBSERVING THESE GUIDELINES.
Requirements
Make sure the PDG-2500 is:
connected with the proper cables and termination impedance
powered up
Controlling the PDG-2500 from the front panel
1. Disable the PDG-2500
The PDG-2500 is enabled if the Enable icon on the front panel has a checkmark.
To disable, press the Disable icon or press the encoder control knob.
2. Set the frequency
Press the Frequency icon on the touch screen.
Press the encoder knob to set the resolution.
Turn the encoder knob to set the frequency.
Press the Done icon.
3. Set the duty cycle
Press the Duty Cycle icon on the touch screen.
Press the encoder knob to set the resolution.
Turn the encoder knob to set the duty cycle.
Press the Done icon.
4. Enable the PDG-2500
Press the Enable icon on the touch screen. The icon displays a checkmark.
Controlling the PDG-2500 from a computer
1. Disable the PDG-2500
Send the command “OUTPUT:DISABLE”.
2. Set the pulse trigger frequency
Send the command “FREQ n”, where n = [5 to 1000000]. Units are hertz.
3. Set the pulse duty cycle
Send the command “DUTYCYCLE n”, where n = [0.01 to 100.00].
Units are percent.
4. Set the analog voltage
Send the command “ANALOG:SETPOINT n”, where n = [0 to 65536].
Units are DAC counts of 5 V/65535 = 76.293 µV each.
5. Enable the PDG-2500
Send the command “OUTPUT:ENABLE”.
Introduction
Description
The PDG-2500 is a single-channel pulse generator source for laser drivers or other
devices requiring a precise frequency generator. It provides pulse repetition
frequencies from 5 Hz to 1.000 MHz and duty cycles of 0.00 % to 100.00 %.
Single-shot pulse widths range from 80 ns to 1.0000000 second.
The PDG-2500 has one analog channel with 0.000 to 5.000 V output and 16-bit
adjustability.
The frequency, duty cycle, and analog amplitude are adjustable from the touch
screen or by computer control via USB interface. The digital output requires a 50 Ω
termination.
Using the instrument is extremely simple using the color LCD touch-screen and a
control knob. The PDG-2500 has the ability to store five unique user settings.
The PDG-2500 is a hand-held system and is battery powered for portability and
electrical isolation.
Typical Uses for the PDG-2500
Panel Layout
All features of the front touch screen and the top end panel are labeled. Their
functions are covered in the next sections.

Front Panel Features
Local Mode
When in computer control, pressing or turning the encoder knob returns the PDG-
2500 to front panel control.
Enable Icon
The Enable icon allows PDG-2500 operation. A checkmark appears when the unit is
enabled.
Touch Screen
The touch screen provides a graphical user interface and front-panel touch control
for most functions of the PDG-2500.
Encoder Knob
Turn the encoder knob to change a value. Push it to cycle through the resolutions
(increments of value change).
TouchScreen
EnableIcon
EncoderKnob
End Panel Features
Analog Output
An analog voltage is available for external devices via an SMB connector.
Digital Output
Pulses for external devices are available via an SMB connector.
USB Cable Connector
Communicates with an external computer through a USB cable.
Power Cable Connector
Accepts a 5 VDC 3 W power adapter.
Power On Button
Turns the PDG-2500 on. Use the touch panel “Settings” menu to turn the unit off.
Accessories Included
AC Power Adapter
Factory-supplied 5 VDC 3 W power adapter.
Battery Power
Two AA batteries, factory supplied, use ONLY NiMH (nickel-metal hydride) batteries.
PowerOnButton
PowerCableConnector
USBCableConnector
DigitalOutput
AnalogOutput
Operation
Power Up
1. Press the power button for 3 seconds to power up the
instrument.
2. The unit plays a tune and displays the DEI information
shown.
3. After a few seconds, the PDG-2500 displays the
Home screen.
Numerical displays show the present settings
Analog icon sets the output analog voltage
Duty Cycle icon sets the output duty cycle
Frequency icon sets the output frequency
PDG-2012 icon displa
y
s the Settin
g
s menu
Set the Frequency
FREQ?
FREQ n
1. From the Home screen, press the Set Frequency
icon.
2. The Set Frequency screen appears.
3. Press the encoder knob to change the resolution:
4. Turn the encoder knob to change the frequency: 5 Hz
to 1000000 Hz.
5. On the screen, press the Done icon. The Home
screen reappears.
Set the Duty Cycle
DUTYCYCLE?
DUTYCYCLE n
1. On the Home screen, press the Duty Cycle icon.
2. The Set Duty Cycle screen appears.
3. Press the encoder knob to select a resolution: x0.01,
x0.10, x1.00, or x10.00.
4. Turn the encoder knob to change the duty cycle: 0.00
% to 100.00 %.
5. On the screen, press the Done icon.
Frequency Resolution
5Hzto995Hz 5Hz
1.0kHzto49.9kHz 100Hz
50kHzto1.000MHz 1000Hz
Set the Analog Output
ANALOG:SETPOINT?
ANALOG:SETPOINT n
1. On the Home screen, press the Analog Output icon.
2. The Set Analog Output screen appears.
3. Press the encoder knob to select a resolution: x1,
x10, x100, x1,000, or x10,000.
4. Turn the encoder knob to change the Analog Set
point: 0 to 65,535. The larger the DAC count the
higher the V
out
set point. Both the DAC count and the
voltage are displayed.
5. On the screen, press the Done icon.
Set the Single Shot
SINGLE:SHOT?
SINGLE:SHOT n
1. On the Home screen, press the Frequency icon.
2. The Set Frequency screen appears. Press the
Single Shot check box.
3. The home screen appears in single shot control.
4. To change the single shot pulse width, press the
Single Shot icon.
5. Press the encoder knob to select a resolution: x80,
x160, x1,000, x10,000, x100,000, x1,000,000,
x10,000,000, or x100,000,000 ns.
6. Turn the encoder knob to change the single shot: 80
ns to 1.0000000 second.
7. On the screen, press the Done icon.
8. Press Enable icon to turn on the single shot pulse for
the set pulse width.
9. To change back to duty cycle control, press the Duty
Cycle Control check box.
10. The home screen appears in duty cycle control.
View Information About the PDG-
2500
*IDN?
1. On the Home screen, press the
PDG-2500 icon.
2. The Settings screen appears.
Press the About icon.
3. The About screen appears. View
the model number, serial number,
manufacture date, and firmware
revision level.
4. Press the touch screen at any
location to return to the Settings
screen.
View the Communication Settings
1. On the Home screen, press the
PDG-2500 icon.
2. The Settings screen appears.
Press the USB Information icon.
3. The PDG-2500 USB Information
screen appears. The screen
reports the baud rate, the number
of data bits and stop bits, and the
parity.
4. Press the upper left icon to return
to the Home screen.
Save Settings
*SAVE n
1. On the Home screen, press the
PDG-2500 icon.
2. The Settings screen appears.
Press the Save Settings icon.
3. The Save screen appears. Press
the icon for one of the five
locations to which you want to
save the settings.
NOTE: Saving to a location overwrites any data at that
location.
4. A checkmark indicator appears on the saved location
when it is finished. Press the upper left icon to return
to the Home screen.
Recall Settings
*RECALL n
1. On the Home screen, press the
PDG-2500 icon.
2. The Settings screen appears.
Press the Recall Settings icon.
3. The Recall screen appears. Press
the icon for one of the five
locations from which you want to
recall the settings.
4. A checkmark indicator appears
when the recall is finished. Press
the upper left icon to return to the Home screen.
Power Down
OUTPUT:DISABLE
1. Disable the unit by pressing the Disable icon or by
pressing the encoder knob.
2. On the Home screen, press the PDG-2500 icon.
3. Press the Off icon on the Settings screen.
Command Set
The Command Set consists of all the commands and queries that the PDG-2500
supports via remote USB control. Commands and queries must be in all capital
letters. Commands and queries that require data, denoted as n, must have a space
between the command and the data.
The PDG-2500 expects “\n” to be the end line character of commands and queries.
The responses to the user’s computer are also terminated with “\n”. For every
command sent to the PDG-2500, a response will be sent back to the user. The user’s
software must wait for a response before sending another command to avoid an
overflow of the PDG-2500 receive buffer.
In the examples, the command or query is in black; the response is in blue italics.
*LIST?
Lists all commands and queries supported by the PDG-2500. Example:
*LIST?
*IDN?
*SAVE n :: n=[1 … 5]
*RECALL n :: n=[1 … 5]
*LIST?
OUTPUT?
OUTPUT:ENABLE
OUTPUT:DISABLE
FREQ?
FREQ n :: n=[5 … 1,000,000] Hz
DUTYCYCLE?
DUTYCYCLE n :: n=[0.00 … 100.00] %
ANALOG:SETPOINT?
ANALOG:SETPOINT n :: n=[0 … 65,535] DAC counts
SINGLE:SHOT?
SINGLE:SHOT n :: n=[80 … 1,000,000,000] ns
*IDN?
Abbreviation for identity; returns the manufacturer’s name, unit model number,
serial number, firmware revision, and manufacture date. Example:
*IDN?
DEI Scientific, PDG-2500, 2012-121131, FW.002, 11.27.2012
*SAVE n
Saves the current configuration to non-volatile memory. The value of n must be
between 1 and 5. Example:
*SAVE 3
Saved Memory Location 3
*RECALL n
Recalls saved configurations. The value of n must be between 1 and 5. Example:
*RECALL 2
Recall Memory Location 2
OUTPUT?
Returns the state of the output (enabled or disabled). Example:
OUTPUT?
Disabled
OUTPUT:DISABLE
Disables the output. Performs the same function as pressing the front-panel
ENABLE icon. Example:
OUTPUT:DISABLE
Disabled
OUTPUT:ENABLE
Enables the output. Performs the same function as pressing the front-panel
ENABLE icon. Example:
OUTPUT:ENABLE
Enabled
FREQ?
Returns the trigger frequency in hertz. Example:
FREQ?
24000 Hz
FREQ n
Sets the trigger frequency in hertz. The value of n must be between 5 and
1000000. Example:
FREQ 24000
FREQ 24000
DUTYCYCLE?
Returns the duty cycle of the pulse in percent. Example:
DUTYCYCLE?
28.00 %
DUTYCYCLE n
Sets the duty cycle of the pulse in percent. The value of n must be from 0.00 to
100.00. Example:
DUTYCYCLE 28.00
DUTYCYCLE 28.00
ANALOG:SETPOINT?
Returns the DAC set point for the analog output. Example:
ANALOG:SETPOINT?
32768 DAC counts
ANALOG:SETPOINT n
Sets the DAC set point for the analog output. The value of n must be from 0 to
65,535. Example:
ANALOG:SETPOINT 32123
32123 DAC counts
SINGLE:SHOT?
Returns the pulse time for the single-shot output. Example:
SINGLE:SHOT?
100 ns
SINGLE:SHOT n
Sets the pulse time for the single shot output. The value of n must be from 80 ns
to 1,000,000,000 ns. Example:
SINGLE:SHOT 321
SINGLE:SHOT 321
Specifications
The PDG-2500 meets or exceeds the following specifications.
Parameter Value
DigitalPulseOutput(DutyCycleControl)
FrequencyRange 5Hzto1.000MHz
FrequencyResolution Frequency Resolution
5Hzto995Hz 5Hz
1.0kHzto49.9kHz100Hz
50kHzto1.000MHz 1000Hz
FrequencyAccuracy ±(0.01xsetpoint+2)Hz
T
jit(cc)
cycletocyclejitter
25ns
DutyCycleRange 0.00%to100.00%
DutyCycleResolution 0.01%
DutyCycleAccuracy ±(0.01xsetpoint+2.5)%
T
jit(duty)
dutycyclejitter
25ns
OutputVoltageLow(V
OL
) 0V±0.1V
OutputVoltageHigh(V
OH
) 4V±0.25V
OutputCurrentLow(I
OL
)‐400µAwith50Ωloadtermination
OutputCurrentHigh(I
OH
) 90mA
Termination Requires50Ω
Connector SMB(50Ωimpedance)
DigitalPulseOutput(Single‐ShotControl)
/