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 | Programming speed |  |
| Approximately 10 ms per command. The amount of time needed to reset the hardware for a delay change is 150 ns. |
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| Pulse picking | |
| Pulse Picking
This feature permits one to pick a single pulse from a stream of continuous pulses and use that single pulse to initiate, time, gate other devices.
A 575’s channel output provides this single pulse and the width of the pulse and t |
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| Maximum trigger rate | |
| The maximum trigger rate of the 575 is dependent on the longest delay and width setting of any channel. The longest delay/width event must be completed before the next event can start. The Model 575 requires a 200 ns setup time between triggers. Thus, |
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| Synchronizing digital delay generators | |
| The 575's have Clock In/Out connectors that allow them to operate off a single clock. Each Clock Out may be connected to the Clock In of the next unit. It is important to keep the TTL-compatible waveforms as clean as possible in the transmission line en |
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| Clock In/Clock Out Overview | |
| Clock In/Clock Out Overview
There are two Clock connectors on the rear panel – Clock In and Clock Out. With each, one may select one of several discrete values: 10, 20, 25, 40, 50, 80 or 100 MHz. The Clock circuits are TTL compatible.
To ac |
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| Pulse Picking | |
| Pulse Picking
A special external clock application is Pulse Picking, where a single pulse from a pulse train operating at a higher rate may be selectively gated. The 575’s channel output provides this Gate and the width of the Gate and the posi |
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| Why do I get the old settings after the first trigger ...then its OK |  |
| When programming in a new configuration, the old configuration will reside in the instrument until one trigger occurs.
This happens because, configurations are reset at the end of a timing cycle. If you are externally triggering and programming afte |
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| Changing of the delay and width happens in realtime ie. no pauses | |
| There are no discontinuities in the pulse train when one changes width or delay. For those that cannot tolerate a pause in the pulse train, the 575 would be a solution. The changes can be via manual control or GPIB, RS232 or USB control. |
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| External Trigger operation | |
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Berkeley Nucleonics Corporation
Application Note - Model 575 Digital Delay / Pulse Generator.
Traditional Digital Delay generators take an external trigger or a repetitive internal trigger to initiate pulses that are synchroni |
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| Digital Delay Generator for ICCD Applications | |
| Digital Delay Generator for ICCD Applications
Intensified charge-coupled device
ICCD s, intensified charge-coupled device, amplifies
and gates light for fast time-resolved measurements
of transient phenomenon. Typical applications often
involve las |
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| Using a Common External Clock or operating in Master/Slave mode | |
| Berkeley Nucleonics model 575 combo digital delay pulse generator for
Using a Common External Clock or operating in Master/Slave mode.
One may use an External Clock for every 575 or one 575 that provides a Master Clock for the remaining units. One sel |
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| Multiplexing Application Note - Model 575 Digital Delay / Pulse Generator | |
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A common request among Digital Delay and Pulse Generator users is the ability to sum outputs on a single channel to create even more diverse pulse trains. The model 575 successfully achieves this function with the Mux feature described below.
Using |
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| 575, a digital Delay Generator with two triggers or a gate and a trigger | |
| BNC announces a new OPTION that will enable experimenters to halve the number of delay generators and halve the space required when two triggers are used. The BNC Model 575 two-trigger option allows one to sync, delay, gate and trigger other devices from |
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| What is the jitter at a 1 second delay? | |
| There are two distinct jitters. (see the article on Jitter Explained) For the 575 the channel-to-channel jitter (250ps), and the external trigger to channel jitter (800ps). Both values are rms, but value goes up with the length to the delay.
Channel- |
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| Jitter explained - Model 575 | |
| The jitter as it pertains to delays is a measure of the unpredictable occurence of a pulse's edge with respect to a reference point. In this case that reference point may be an external trigger or another channel. We have different numbers for each of t |
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| Automatic incrementing the delay and/or width Model 575 | |
| The 575 has an option that allows you to automatically increment the delay and/or width time with you choosing the increment. There are some limitations to the option: rate and increment size. The update rate required for incrementing is 10us + 30us per |
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| Gating just selected channels using Model 575 | |
| There are applications whereby one wishes to gate the pulses of only specific channels while the rest of the channels remain ungated. The 575 allows either gating of the entire instrument or gating of specific channels.
Gating of the entire instrument |
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| Altering the Sync Source of individual channels Model 575 | |
| The default sync source for all channels is To. It is possible to reference a Channel's delay to any other channel.
To access the Sync Source menu for a specific Channel, push Function and then the Channel letter. This is the first of the Advanced |
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| Adjusting risetime of the Model 575 | |
| The output of the 575 has fixed rise and fall times. For some applications, a slower or changable risetime is desirable.
A simple solution would be to insert a low-pass filter in series with your load. Since the 575 has a 50 ohm source impedance, o |
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| Optical inputs and outputs use off-the-shelf components and is well-suited for noisy environments Model 575 | |
| The detectors and emitters are made by Avago, HFBR-0400Z, HFBR-14xxZ and HFBR-24xxZ Series. Thus, you do not have to design interfaces for our inputs and outputs, and get them off-the-shelf.
Each of the 575's digital delay generator channels produce |
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| Accessing Advanced Channel menu's | |
| Advanced Channel menus give the user access to selecting that channel's sync source and that channel's gate operation. Each channel may have different sync sources and gate operation. The default for Sync source is To. The default for Channel Gate oper |
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| New digital delay/pulse generator features - Model 575 | |
| A Powerpoint presentation describing the unique features of the 575 is available. This explains features that are immediately apparent from reading the data sheet. It will soon be available on the downloads section, but in the meantime please ask info@b |
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| Quick start - Model 575, digital delay/pulse generator | |
| A written description of the operating the 575 will be available in the download section. In the meantime, please ask info@berkeleynucleonics.com to email you a copy of Starting Up 575. |
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| Divide-by-n function in Model 575 | |
| Sometimes it is desirable in an application that the frequency of a particular pulse signal be reduced to a lower frequency pulse signal for use by other peripheral devices. This can be achieved by using the Duty Cycle of the Model 575.
Duty Cycle can |
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| Dual trigger digital delay generator | |
| The 575 digital delay generator has a dual trigger option, (called DT-15). The 575 has separate Gate and Trigger inputs, and the dual trigger option allows the Gate to function as a second trigger. This gives the user two triggers and the ability to se |
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| 35V option - having both 35V and TTL/CMOS outputs | |
| When you order the 35V option all the channels come with 35V. You may choose which channels operate in the calibrated 35 V mode and which channels operate in the calibrated low voltage mode. The 35 V connectors are on the rear panel. The 35V output deliv |
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| Stand-by Button on 575 Front Panel | |
| The soft button located in the upper right corner of the front panel is an AC stand-by button.
When the 575 is in Stand-by Mode, AC and DC power are present in the 575. If AC power is removed for an extended period of time by removing the power cable or |
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| Accuracy of widths and delays of each channel - Model 575 | |
| The accuracy of the width and delay for longer widths and delays is a function of the oscillator accuracy. A digital delay generator produces widths and delays by counting oscillator pulses and then doing interpolation to achieve resolutions lower than t |
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| Model 575 - How to generate negative voltage pulses | |
| The 575 outputs generate positive voltage pulses only, but occasionally one needs a negative voltage pulse for triggering devices. It is possible to invert the TTL/CMOS with an inverting pulse transformer. Pulse transformers will limit the pulse width. |
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| 2D IR spectroscopy - control and time laser pulses - Model 575 | |
| The 575 is useful in controlling the time between laser pulses. It can generate single pulses or even wave trains as the experimental approach requires. In addition, the time between pulses, the number of pulses in a wavetrain, whether the wavetrain is |
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| USB Communication with Model 575 | |
| Windows Vista and Windows 7 operating systems utilize a 64-bit USB platform. BNC Models 565, 575, and 588 manufactured with 32-bit USB chipsets are not compatible with the 64-bit USB platform. The compatibility cannot be remedied with drivers or firmwar |
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| Raw TCP/IP Ethernet Communication with Model 575 | |
| Model 575 Ethernet Interface Overview
The Ethernet module used is a Digi Connect ME module supplied by Digi Connectware, Inc. There are several ways to successfully communicate with the pulse generator over Ethernet. The two most popular methods are ra |
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| Mapped Port Ethernet Communication with Model 575 | |
| Model 575 Ethernet Interface Overview
The Ethernet module used is a Digi Connect ME module supplied by Digi Connectware, Inc. There are several ways to successfully communicate with the pulse generator over Ethernet. The two most popular methods are ra |
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| Using the Model 575 System Counter | |
| Oscilloscopes and other data collection devices are often used to capture and record the results of triggered events that are coordinated by digital delay generators. Often the oscilloscope or other data collection device can be prompted to record by rec |
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| Reset the 575 to Factory Default Settings | |
| Sometimes the most effective tool in troubleshooting is to start from a known condition.
To reset the 575 to factory settings, please do the following:
Press FUNC, then press RECALL. The 575 should display "Recall #: 0", indicating that you are about t |
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| Optimize Trigger Input Success | |
| The Trigger input (TRIG) on the Model 575 has an input impedance of 1.5k ohm. This is considered necessary in order to protect the input circuit against over voltage (maximum 60 V peak).
This can pose a problem if the output impedance of the signal tr |
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| Erasing Memory of Model 575 | |
| Some sensitive applications require that the memory of the 575 be wiped clean after use. The process is achieved by resetting the 575 to factory values, then overwriting the memory locations with these values as well.
To reset the 575 to factory setti |
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