1.GENERAL INFORMATION .................................................................................................................................. 5
3.1.1. Power source ............................................................................................................................................... 8
3.1.2. Power cord .................................................................................................................................................. 8
3.2. OPERATING TEMPERATURE .................................................................................................................................. 8
3.3. RACK MOUNTING INFORMATION .......................................................................................................................... 8
4.1. FRONT PANEL ....................................................................................................................................................... 9
4.1.1. Local interface ............................................................................................................................................ 9
4.1.2. AUX 1 to 3 ................................................................................................................................................... 9
4.2.1. Power switch ............................................................................................................................................. 10
4.2.2. Ethernet port (LAN) .................................................................................................................................. 10
5.1. MAIN MENU ....................................................................................................................................................... 11
5.8. FRONT PANEL “RUN/STOP” BUTTON .................................................................................................................. 17
6.REMOTE CONTROL ............................................................................................................................................ 18
6.2.4. VOLTAGE LEVEL .................................................................................................................................... 20
6.2.8. RUN ........................................................................................................................................................... 22
6.2.9. ARM .......................................................................................................................................................... 23
6.2.10. STAT .......................................................................................................................................................... 24
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6.2.11. IP adress ................................................................................................................................................... 25
6.3. REMOTE CONTROL VIA WEB PAGE ...................................................................................................................... 27
Clock output (same frequency as specified clock input)
Option 2
2.5 to 10 V channels, 1 ns rise time, positive polarity
Option 3
Amplitude up to 20 V, adjustable
Option 4
Maximum amplitude up to 32V (fixed)
Option 5
1 ps resolution
Option 6
Front panel for local control (touchscreen)
Other
Trigger source saved after shut down, Immediate modification of output pulse without
validation, specific options available upon request.
1.1. Overview
The MOD745-20 Digital Delay Generator provides twenty independent delayed output pulses.
Delays up to 10 seconds may be programmed with 100ps resolution (1ps optional) and a channel to
channel jitter of less than 50 ps RMS.
BNC outputs deliver delayed pulses with adjustable level (3 to 6V) and width into 50Ω load. A polarity
control allows to have inverted pulses.
A trigger output signal (T0) is provided as the temporal reference for the delayed outputs.
The MOD745-20 may be remote controlled via Ethernet interface (10/100Mb/s) (basic commands or Web
page interface).
Instrument Options
Package contents
The box you receive should contain the following:
oMOD745-20 instrument,
oPower cable,
oUser’s manual,
oCD containing DLL and Labview driver.
Berkeley Nucleonics products
For more information about Berkeley Nucleonics products see our web site:
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1.2. Principle – Block diagram
The principle of the MOD745-20 programmable delay generator is described in the figure bellow.
The sequence follows 3 phases:
1) After an insertion delay, a reference pulse appear at the “T0” output,
2) Following the reference, a pulse is generated on each channel after the specified delay,
3) At the end of the sequence, after last delayed pulse outputs, the delay generators are initiate.
When a sequence is in progress the instrument will not respond to a trigger event.
Each channel T1 to T20 can be independently set in level, width, delay, polarity and trigger source. All
these values are saving when the equipment is shut down, except the trigger source (option). After the power
on, all trigger sources are set to OFF (INH).
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2.SPECIFICATIONS
Delays
Channels
20 independent delay channels
Range
0 to 10 seconds
Resolution
100 ps (1 ps option)
RMS Jitter
< 50 ps + delay x 10-7 rms
Internal time base
Frequency
CLK RF
Stability
10
-8
Trigger
Single shot source SS1 and
SS2
SS1 synchronous with the first occurrence of F3 and SS2 with the second
occurrence of F3.
Positive or negative pulse into 50 ,
Amplitude 3 to 6 V , resolution: 10 mV,
Rise time : < 5 ns,
Fall time: < 10 ns,
Width: 100 ns to 300 ms
Connector type BNC,
Reference output (T0)
Positive pulse into 50 , amplitude 3 to 6V, resolution 10 mV
Rise time < 5 ns, fall time < 10 ns, width 100ns to 300 ms
Connector type BNC
Front panel (option), Ethernet 10/100 Mb/s, Internet (Web page)
General
Power Required
90 – 220 V / 50 – 60 Hz / 1 A.
Weight
Net: < 10 kg
Dimensions
19’’, 2 U, 320 mm without handles
Level: 3 to 6 V
Width :
100 ns to 300 ms
Tm :
< 3 ns
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3.INSTALLATION
3.1.1. Power source
The MOD745-20 can be operated from 90 VAC to 240 VAC nominal supply source.
The maximum power consumption of the MOD745-20 is 80 W.
3.1.2. Power cord
The MOD745-20 comes with a removable power cord for US operation. It has a three contact plug for
connection to both the power source and protective ground.
3.2. Operating temperature
The MOD745-20 can be operated where the ambient air temperature is 0°C to 35°C and can be stored in
ambient temperature from - 10°C to + 60°C. The MOD745-20 is cooled by air circulation. To prevent
instrument damage a clearance of 2 inches on the side and 1 inch on the rear must be maintained for proper
cooling.
3.3. Rack mounting information
The MOD745-20 will fit a 19 inch rack.
3.4. Self-test
The model, firmware version, serial numbers of the equipment and self-test will be displayed for a certain
duration after the start up, depending on the ambient temperature. The self-test should not exceed 1 minute.
3.5. Optimal performance
To ensure optimal performance, it is recommended to wait 1 hour after the equipment’s switching on.
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4.INTERFACES DESCRIPTION
4.1. Front panel
The MOD745-20 front panel is depicted in the following figure.
4.1.1. Local interface
The MOD745-20 is equipped with a touch screen (option) on the front panel for local operation.
4.1.2. AUX 1 to 3
The three BNC connectors located on the front panel are used for extension to 40 channels. They are
unused in the MOD745-20 version.
4.2. Rear panel
All input/output connections on the MOD745-20 are located on the rear panel depicted in the following
figure.
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4.2.1. Power switch
The unit is turned ON by switching the red button located above the mains connector.
The MOD745-20 can be operated from 90 to 240 V at a line frequency of 50 – 60 Hz.
4.2.2. Ethernet port (LAN)
The “LAN” RJ45 rear panel connector is used to remote control the MOD745-20 with TCP/IP protocol.
4.2.3. Trigger input (TRIG IN)
The “TRIG IN” BNC connector is used for application of the trigger input signal that generates the single
shot sequence.
4.2.4. Trigger ouptut (T0)
The “T0” BNC connector is used as the output temporal reference for delayed outputs. This should be
terminated in 50 if used.
4.2.5. Clock output (CLK OUT)
The “CLK OUT” BNC connector (option) is used to monitor the internal frequency reference divided by 2.
This signal is synchronous with the other outputs. This should be terminated in 50 if used.
4.2.6. Clock input (CLK IN)
The “CLK IN” BNC connector is used to add an external frequency reference.
4.2.7. Delayed output (T1 to T20)
“T1” to “T20” BNC connectors are the 20 delayed outputs. They should be terminated in 50 if used.
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5.LOCAL OPERATION
PULSE OUTPUT displays the settings of
each channel T0 to T20.
INTERNAL FREQUENCIES displays the
actual set of frequencies F1, F2 and F3.
STATUSdisplays the status of the
equipment (internal or external clock and
status).
1 to 20 indicators light up in green when the
corresponding channel has been triggered.
TRIG runs a unique single shot sequence.
5.1. Main menu
After power on, the main menu appears on the touch screen as depicted below.
Notes:
- The displayed channel in PULSE OUTPUT window is set with the scroll bar at the bottom of the
screen.
- The STATUS OK indicator turns red when the equipment is in a default state.
- The 1 to 20 trigger status indicators turn green if the channel has delivered at least one pulse.
- Tapping on the 1 to 20 trigger status indicators will reset them until next trigger.
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5.2. Sub-menu “PULSE SETUP OUTPUT”
DELAY parameter is the delay of the
channel, relative to T0, in ps.
AMPLITUDE parameter is the voltage level
of the channel, in mV.
WIDTH parameter is the width of the
channel, in ns.
POLARITY parameter is the quiescent level
of the channel.
TRIGGER parameter is the trigger source of
the channel.
T0 to T20
TRIGGER
SOURCE
Disabled (INH)
Repetitive F1 (F1)
Repetitive F2 (F2)
Repetitive F3 (F3)
Single Shot 1 (SS1)
Single Shot 2 (SS2)
AMPLITUDE
3000 mV to 6000 mV in 10 mV steps
WIDTH
100 ns to 300 ms in CLK RF steps
Tapping in the “PULSE OUTPUT” window on the main menu will open a sub-menu with the channel
settings depicted in the following figure.
Notes:
- At power on, all channels trigger are set to INH (disabled).
- To set delay, amplitude or width, tap on the corresponding window to open the sub-menu.
- To change polarity, tap on the button in the polarity window ( ).
- To change the trigger source tap on the corresponding source button.
- The displayed channel can be changed with the scroll bar at the bottom of the screen (left or right)
directly in this sub-menu.
- The sub-menu can be closed by taping and dragging up the center of the bottom scroll bar.
The following chart described the trigger source, amplitude, width and polarity possible value for each
channel.
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POLARITY
Positive : quiescent level of the channel is 0V
Negative : quiescent level of the channel is at amplitude level
T1 to T20
DELAY
0 to 9 999 999 999 999 ps in 100 ps steps or 1 ps steps (option)
The default values of the equipment are the following:
Tapping in the “DELAY” window on the “PULSE SETUP OUTPUT” sub-menu will open another sub-menu
with the delay settings of the channel depicted in the following figure.
To set the channel delay, enter the value with the numbers, then tapping on the unit (ps, ns, µs, ms or s)
will validate the setting.
Erase
Exit sub-menu
Note: Out of range values are rejected.
5.2. Sub-menu “Amplitude”
Tapping in the “AMPLITUDE” window on the “PULSE SETUP OUTPUT” sub-menu will open another submenu with the voltage level settings of the channel depicted in the following figure.
To set the channel level, enter the value with the numbers in millivolts, then tapping on the validate button
will send the setting.
Erase
Exit sub-menu
Validate
Note: Out of range values are rejected.
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5.3. Sub-menu “Width”
Tapping in the “WIDTH” window on the “PULSE SETUP OUTPUT” sub-menu will open another sub-menu
with the width settings of the channel depicted in the following figure.
To set the channel width, enter the value with the numbers in nanoseconds, then tapping on the validate
button will send the setting.
Erase
Exit sub-menu
Validate
Note: Out of range values are rejected.
5.4. Sub-menu “INTERNAL FREQUENCIES SETUP”
Tapping in the “INTERNAL FREQUENCIES” window on the main menu will open a sub-menu with the
internal frequencies settings depicted in the following figure.
To set the frequencies, tap on the window corresponding to the internal frequency to configure.
Notes:
- F1 is the highest frequency.
- F3 is the lowest frequency.
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5.5. Sub-menu “Frequency”
Tapping in the “F1”, “F2” or “F3” window on the “INTERNAL FREQUENCIES SETUP” sub-menu will open
another sub-menu with the corresponding frequency settings depicted in the following figure.
To set the frequency, enter the value with the numbers, then tapping on the unit (Hz or KHz) validate the
setting.
Erase
Exit sub-menu
Notes:
- Out of range values are rejected.
- The frequency values can be set in a 1 – 2 – 5 sequence.
- F1 > F2 > F3 and minimum gap of 2 between F1 and F2 or F2 and F3.
5.6. Sub-menu “NETWORK ADDRESS SETUP”
Tapping in the “STATUS” window on the main menu will open a sub-menu with the network address
setup as depicted in the following figure.
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5.7. Sub-menu “IP Address”
Tapping in the “IP Address” window in the “NETWORK ADDRESS SETUP” sub-menu will open another
sub-menu with the IP address setup as depicted in the following figure.
Erase
Exit sub-menu
Validate
Notes: Submenus “NETWORK MASK” and “GATEWAY ADDRESS” are identical.
5.8. Front panel “Run/Stop” button
The front panel ‘Run/Stop’ button enables channels programmed with a single shot trigger source (SS1 or
SS2) to trigger each time a pulse is present on the rear panel ‘TRIG IN’ input.
Each press of the button will change the state alternately.
When in ‘Run’ state, the led inside the button lights in red.
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6.REMOTE CONTROL
6.1. Connection
To connect over the LAN, follow these steps:
Connect the instrument LAN connector to the remote control computer,
On the user interface, either specify the LAN address,
On the remote controlcomputer, enter the instrument’s IP address,
After the connection has been established, the following commands can be used to modify the
settings:
oSet the instrument’s IP address with: IP XXX.XXX.XXX.XXX
oQuery the instrument’s IP address with: IP? :IP XXX.XXX.XXX.XXX
oSet the instrument’s IP mask with: NM XXX.XXX.XXX.XXX
oQuery the instrument’s IP mask with: NM? :NM XXX.XXX.XXX.XXX
oSet the instrument’s IP gateway: GW XXX.XXX.XXX.XXX
oQuery the instrument’s IP gateway with: GW? :GW XXX.XXX.XXX.XXX
6.2. Command structure
MOD745-20 is compatible with all command of the LIL timing system.
Each command description has at least some of the following items:
Full command syntax
Form Set / Query
Brief description
Parameters
RST value
Specified limits
Example
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6.2.1. IDENTIFICATION
Syntax:
*IDN?
Form:
Query
Description:
Query instrument identification. Response gives instrument model, serial
number and firmware version.
Parameter:
-
RST value:
-
Example:
Answer: GFTy/MIPSI,MOD745-20,SN54001/000000,V1.0
Instrument model: MOD745-20
Serial number: 54001
Firmware version: 1.0
Syntax:
DELAY T<n>,<D>
DELAY? T<n>
Form:
Set & Query
Description:
Query delay of channel T<n> or set the delay of channel T<n> to <D>
picosecond (relative to T0 channel)
Parameter:
<n>: Channel number (1 to 20)
<D>: Delay value (in picosecond)
RST value:
Last value set
Range:
0 to 9 999 999 999 999 ps
Example:
Set 1 ns delay on channel 2: DELAY T2,1000
Query delay on channel 2: DELAY? T2 (Answer: :DELAY T2,1000)
6.2.2. DELAY
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6.2.3. TRIGGER
Syntax:
TRIG T<n>,<Tg>
TRIG? T<n>
Form:
Set & Query
Description:
Query trigger mode on channel <n> or set channel <n> trigger mode to
Frequency 1 (F1), Frequency 2 (F2), Frequency 3 (F3), Single Shot 1
(SS1), Single Shot 2 (SS2) or Inhibit (INH)
Parameter:
<n>: Channel number (0 to 20)
<T>: Trigger mode (F1, F2, F3, SS1, SS2 or INH)
RST value:
INH
Example:
Set channel 2 trigger mode to Frequency 1: TRIG T2,F1
With Internet explorer or Firefox, you can open a web page to drive the MOD745-20 at the IP address
specified:
The “PULSE OUTPUTS” area allows controlling each output from T0 to T20:
- Trigger source (F1, F2, F3, SS1, SS2 or INH)
- Delay in ps
- Amplitude in mV
- Width in ns
- Polarity (positive or negative)
And displays the state of the channels T1 to T20:
- Led lights green : the channel has been triggered
- Led off (black) : the channel has not been triggered
A click on the leds reset all the states of the channels.
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The “SYNC MESSAGE” area allows to:
- Change the values of F1 to F3
- Toggle between Run and Stop states (“Run” button lights green when in “Run” state)
- Perform a single shot (“Trigger” button lights green when a single shot occurred, and can be erased
by clicking on the state led of the channels)
The “STATUS” area shows:
- The level of the internal power supplies
- The internal temperature of the unit
- The state of the clock (lights in green when external clock)
Notes: When entering a new value, after pressing “Enter” key, the field turns yellow briefly (the new value
is sent), then turns white again (the new value has been taken into account). If the new value is out of range,
then the field will turn red, until a valid value is entered.
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7.SOFTWARE
The MOD745-20 comes with DLL drivers for Windows XP or Seven. Our primary objective in designing
software drivers is to get the user up and running as quickly as possible.
Software drivers are provides as a Dynamic Link Library (DLL) which is compatible with most 32-bit
windows based development software. The main program is written on Labview v11 or later.
The listing of files is the following:
MOD745-20: main program,
DLL or vi:
o*.dll or *.vi : set the value,
o*_val.dll or *_val.vi : query the value.