Generatori di impulsi
Model PB-5 | NIM Programmable Precision Pulse Generator
The PB-5 sets a new standard for precision pulse generators. It offers full digital controllability with a built-in ramp generator for linearity testing. It provides tail and flat top pulses with outstanding integral linearity and extremely low amplitude change with temperature. The PB-5 is capable of testing the stability, linearity and resolution of the most demanding spectroscopy circuits and instrumentation. It is the successor to the industry standard, PB-4.
The 4x16 LCD display, keypad, and a spinner knob provide a user interface that is easy to use. RS232 interface is also standard along with memory that will store and recall nine complete pulse setups.
Completely ProgrammableBuilt-in ramp generatorExcellent linearity, stability and resolutionThe Model PB-5 provides unprecedented performance in a precision pulse generator. It includes a full-featured, highly flexible ramp generator and programmability. As a precision pulse generator, the PB-5 surpasses or equals all existing designs in the important performance areas of resolution, linearity and stability. The pulse repetition rates, which are variable over a broad range, go up to 0.5 MHz. The higher rates are required when testing for MCA and PHA linearity because of the high number of data points required for a statistically valid test.
The built-in ramp generator allows you to control ramp duration, the number of ramps and the ramp limits. Now you can test the entire range of your system or just a portion of that range. This ramp generator and precision pulse generator combination allows you to tackle the most demanding applications. The new user interface is intuitive and easy-to-use. Parameters can be selected and changed by spinner knob and/or keypad pushbuttons.
td alignBNC | 400, 500 | Digital Delay, Pulse Generators Specifications
The Models 400 and 500 Series Digital Delay/Pulse Generators provide the highest value and utility for products of this type. With their low cost/channel and ability to operate in several modes, they represent an inexpensive and productive option.
Multiple timing pulses in many configurationsThe 400 and 500 Series Digital Delay/Pulse Generators provide accurate, repeatable precisely-timed pulses. The timing may be referenced to an incoming trigger or an internally- generated adjustable clock. They are a source of stable intervals, delays and gates, counted bursts, bursts within bursts, gated pulses, divide by N pulses, user-determined pulse duty cycles. Furthermore, a separate channel can provide functions that are referenced to the timing of the other channels, but with different patterns such as separate channel manual enable, separate channel gate, separate channel divide by N.
Storing settings and programmingComplete sets of system configurations can be stored in non-volatile memory for easy and rapid recall. Complete control of the instruments is accessed through the RS232 interface and an optional GPIB interface.
Opto-isolation with 20 V outputsOpto-isolated inputs and outputs provide a way to operate in noisy environments. Our timing circuit uses a ground that is isolated from that of the input or output lines. All outputs provide up to 20V from a 50 ohm source impedance and provide normal or complementary mode. The amplitude of the pulses is manually adjustable.
Easy way to reconfigure the operating featuresEach series of instruments contain common timing and pulsing circuits and the final configuration and functions provided is determined by instructions that are provided in ROM. The hardware can be converted to a different model by merely changing the ROM. Additionally, BNC is willing to create ROM's that provide the timing you need, (provided it is within the scope of the hardware).
How the 400 and 500 series differ from each otherThe 400 Series units are the least expensive units and provide 2 channels, at 1 us resolution, with timing from 0 to 100 sec, timing jitter of 4 ns and an internal clock with a maximum rate to 2 kHz. The 500 Series units provide 4 or 8 channels, at 200 ns resolution, with timing from 0 to 100 sec, timing jitter of 2 ns and an internal clock with a maximum rate to 1 MHz. The 500 Series models have lower indeterminancy and insertion delay.
How the models differ within a given seriesThe 400 Series models differ mainly in maximum rep rate. The 500 Series models differ in maximum rep rate, the number of channels and whether timing control is by width and delay values or by edge placement. For edge placement models, the edges can be referenced to the trigger or to any other edge so that when the value of one edge is changed all other channels maintain their time skew to that edge. For width and delay value models, each channel's values are given specific numbers eg. a delay of 1.4 us and a width of 66.8 us for channel 7. Refer to the table on page 4 for the performance features of the different models.
MODES OF OPERATION
Continuous delay and widthTriggered externally or internally by an adjustable rate generator, these units provide independently adjustable delays and widths for all channels. Having both delay and width control can reduce by half the number of channels (hence the number of instruments) you will need when compared to instruments that require you to combine two channels to achieve delay and width control.
Gated operationThe pulse train can be enabled or disabled by an external gate input. The ext/gate input is the controlling signal, and thus only internally generated pulses can be gated. The gate mode works with continuous, burst and duty cycle modes of operation.
Burst operationIn this mode a burst of 'n' pulses is provided then all pulse production ceases until the burst is initiated by push button again. All the channels retain their independent width and delay control while producing 'n' pulses. Burst operates with internal rate generator and is gateable. Operation with ext trig optional.
Duty cycle operationSelect the duration that pulses are on and also the duration that they remain off before starting up again. The on:off sequence is repeated for a selectable 'n' number of cycles before ceasing. Works with rate generator and is gateable. Operation with ext trig optional.
Separate channel enableWhile all the other channels are operating, a separate channel can be manually disabled. For instance, while setting up the timing and firing sequences, the trigger for the laser itself can be disabled. This feature is available with units that have T2 mode options.
Separate channel gateWhile all the other channels are operating, the outputs from only one channel can be gated on and off. This feature is available with units that have T2 mode options. With this option the gate can operate for all channels or just one channel.
Separate channel waitA separate channel's output is disabled until 'n' pulses occur in the other channels. This feature is available with units that have T2 mode options. This is especially useful while waiting for a laser to thermally stabilize before activating a Q-switch. The wait option operates in continuous, burst and duty cycle modes.
Separate channel divide by nA separate channel's output occurs every nth time the other channels' pulses occur. This feature is available with units that have T2 mode options. You may pulse a flash lamp n times before using the single output from the separate channel to trigger your laser.
Burst packetA standard option that illustrates the flexibility of our design that allows us to configure the output timing in a number of ways. One controls the number of pulses in each burst, the rate at which pulses in the burst occur, the number of bursts in each packet, the delay between bursts and delay between packets.
Model 575 Digital Delay / Pulse Generator
The Model 575 provides multi-channel 250 ps-resolution timing, delaying, gating, pulsing and syncing functions for an attractive price. There are many practical modes of operation and features in addition to the traditional digital delay and pulse generator modes. For usefulness and value – there is nothing comparable.
Each channel provides both delays and widths – so a 2-channel Model 575 provides the same delay and width functionality of competitive 4-channel units. The 575 is available in 2, 4 and 8 channel configurations, with optional Ethernet, High Voltage and Dual Input Trigger options.
This Digital Delay/Pulse Generator, representing our finest in precision timing, provides precise delays and widths with 250pS resolution for times up to 1000 seconds. Low jitter both with internal clocks (50pS) and using an external trigger (800pS) give users the timing needed to control many devices. This is particularly useful where several pulses or gate signals need to be delayed and timed with respect to each other or the common trigger. You may even use one channel as a trigger reference for other channels, locking the timing delays when needed. There is lots to learn about the Model 575, which offers much more than a clock-divider, independent channel triggering, independent amplitudes/channel, delay and width control, and a Labview 8 driver. Give us a call, we are happy to discuss your applications.
Model 625A/SG-100A (Telulex Inc.)
The BNC Model 625A (SG-100A/Telulex) represents a major breakthrough in price/performance for signal generation and signal measurements and analysis. This versatile device allows the engineer to access a broad range of operating modes such as arbitrary waveform, pulse, word/data integration, function, VCO, AM, FM, SSB, FSK, and burst.
The BNC 625A is much more than a a signal generator: Never before has so much versatility, capability, and performance been packed into a single-low cost instrument. Its architecture is based on the latest advances in DSP and DDS technology which not only ensures calibrated and drift free performance, but also gives the engineer signal measurement and analysis functions such as voltage/power measurement and DTMF detection.
The BNC 625A delivers clean, fully synthesized, DC to 21.5 MHz modulated or unmodulated waveforms with ) 0.01 Hz frequency resolution and 1mV and 0.1 dBm amplitude resolution. User friendly features include a large, easy-to read LCD display which allows the user to see all modulation parameters simultaneously. A full numeric keypad and encoder provides direct editing of each parameter, without confusing sub-menus.
Areas of application include: medicine, education, communications, photonics, circuit design, power systems, and consumer electronics.
Model 625/630/632 | Arbitrary Waveform
The Model 630 and 632 Arbitrary Waveform Function Generators represent the finest single source for signal generation to date. Combining the latest DSP and DSS technologies, the Model 630 and 632 offer a number of operating modes, providing a versatile, cost-effective signal source. You will find the Model 630 and 632 are an excellent value for any bench.
Arbitrary Waveform Function Generator, Sweep Function Generator, Pulse, VCO, AM, FM, Ø Modulation, FSK and Burst Modes are all accessed quickly and easily from the front panel keypad.
The 630's user-defined waveform capability eliminates the phase shifts, added data points and dropped data points associated with traditional designs. In traditional designs, when the number of data points and the desired output frequency do not match exactly with the internal timing, data points are either repeated or dropped. What's more the dropped or repeated data points are not necessarily the same ones each time the arbitrary waveform is constructed. In the traditional designs, when the sampling clock rate and the total points in the waveform are not exactly matched, the sampling of the data points results in phase shifts as well. The 630 is a "true arb" with fully synchronized outputs.
Model 745 Digital Delay Generator (DDG)
BNC 745-pr-1: Un nuovo generatore di ritardo digitale che fornisce un controllo incrementale su tempi di 250 fs (femtosecondi)
L’ultimo generatore di ritardo digitale dalla Berkeley Nucleonics (San Rafael, CA) fornisce agli utilizzatori la possibilità di incrementare i ritardi con un piccolissima risoluzione . (In un femtosecondo la luce percorre 0.0003mm).
Il Modello 745 Digital Delay Generator (DDG) è un nuovo strumento progettato per applicazioni ultra-veloci con un preciso controllo del tempo, in cui gli utilizzatori devono sincronizzare degli eventi tra di loro o ad un impulso. Il DDG raggiunge 5 picosecondi di jitter con un controllo sul ritardo e la larghezza d’impulso di 250 femtosecondi. L’ordine di grandezza del miglioramento nel jitter e nella risoluzione permette la ricerca in campi come la ricerca X ray-initiated, laser a impulsi veloci e nanocristallografia.