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Model 575 Digital Delay / Pulse Generator

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Click to start tutorial - General Overview

Part Number Description
P/N6923 Model 575 19" Rack Mount
P/N6978 Model 575 19" Dual Rack Mount

Model 575 Options:

Model 575 8 Channel Configurable Pulse Generator
8-Channel: 250 ps resolution with 8 independent outputs or inputs.  575 - 8 Channel Configurable Pulse Generator
Model 575 4 Channel Configurable Pulse Generator
4-Channel: 250 ps resolution with 4 independent outputs or inputs.  575 - 4 Channel Configurable Pulse Generator
Model 575 2 Channel Configurable Pulse Generator
2-Channel: 250 ps resolution with 2 independent outputs or inputs.  575 - 2 Channel Configurable Pulse Generator

A Summary of Electrical Outputs Follows -

·       AT20 – The standard 575 provides a selectable TTL or 20V into a high impedance from a 50 ohm source impedance.  The TTL level is fixed; the 20V level is adjustable down to 2V. The risetime is 3 ns.

·       TZ50 – Choose this option on 2, 4, 6 or all 8 channels to get TTL levels into 50 ohms.  The standard output provides 4V pulses from 50 ohms which becomes 2V into a 50 ohm load.  The TZ50 provides 4V into 50 ohms. The risetime is 3 ns.

·       AT45 – Choose this option to get 45V into 50 ohms.  This option provides an adjustable 3-45V pulse into 50 ohms.  The risetime is a respectable 2 ns. This is our newest option and will replace the AT35 in many applications unless price sensitivity makes the AT35 more attractive **Due to the power consumption and heat restrictions, only a maximum of four AT45 channels can be added on a single unit

·       AT35 – This is our standard high voltage module. Order 2, 4, 6 or all 8 channels. This gives you 35V into 50 ohms.   This option provides an adjustable 35V pulse into 50 ohms. The risetime is 30 ns.

A Summary of Optical Outputs Follows -

·       L82 – 820nm Optical Output

·       L130 – 1300nm Optical Output

Feature Summary Optical Inputs and Outputs

Berkeley Nucleonics provides the option of having combinations of optical and electrical inputs and outputs.  For example, one may have an eight-channel unit with an electrical input and four optical and four electrical outputs.  One may also order all optical inputs and outputs.  

Some advantages of optical fiber

  • EMI Immunity
  •   Level translation – Move triggers from one potential to another
  • No sparks and no high voltage pulses to overcome noisy environments
  • Smaller size and much less weight than copper cables
  • Span longer distances without signal degradation
  •   Can easily fit in existing installations             

Wavelengths, connectors,  and fiber considerations
  • Commercially available transmitters and receivers to facilitate your interface
  • One may select either 820 or 1300nm
  • ST is the standard connector with 0.2dB typical
  • Compatible with 50/125 um, 62.5/125 um, 100/140 um and 200 um HCS fibers.
  • Distances up to 1.5 km using these receivers and transmitters



PIV Application Note | Industry Comparison Chart | Introduction | Product Launch Press Release | High Voltage Outputs Press Release | High Voltage Summary (Powerpoint)

The Model 575 provides multi-channel 250 ps-resolution timing, delaying, gating, pulsing and synchronizing 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 -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.


•  New Multi-Unit Control Software

•  250pS Delay & Width Resolution on 8 channels

•  50pS channel Jitter / 800pS RMS Ext. jitter

•  Independent clock rates for each channel

•  Clock In & Clock Out

•  Programmable (Ethernet/USB/RS-232/GPIB)

•  Combine Electrical and Optical Outputs

•  Dual Inputs ( Gate+Trig / 2 Trig)

•  Features Overview (ppt)


•  Trigger, Gate, Delay, Pulse or Sync experiments or lasers

•  Sync to an External Clock, Pulse Pick (up to 100 MHz)

•  Master/Slave or Multiple Unit Slave; Complex Burst Functions

•  Control Front-End, Q-Switch, Flashlamp, PIV, Laser/Pump Laser Timing

•  Laser Induced Breakdown Spectroscopy (ppt)

This Digital Delay/Pulse Generator, representing our finest in precision timing, provides precise delays and widths with 250 ps resolution for times up to 1000 seconds. Low jitter both with internal clocks (50 ps) and using an external trigger (800 ps) 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 much to learn about the Model 575, which offers much more with 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.

New Features in the Model 575:

Illuminated Channel Enable Buttons
Each channel has a designated enable/disable button. When individual channels are active or enabled the buttons are illuminated. This allows for easy reference and avoids any confusion of output operability. The run/stop indicator on the front panel LCD display as well as an illuminated run/stop button further simplify setup.

Selectable Clock Reference
The Model 575 offers additional inputs and outputs for external clock synchronizing. Specify your input/output reference frequency (10MHz to 100MHz). Synchornize with the Mode Lock Oscillator of a laser, or phase lock multiple units with one clock.

Flexible Gating Options
The Model 575 is packed with gating options for almost any setup. You may gate with a channel or on any input. You may gate individual channels or gate all. Gate immediately (output inhibit) or gate after a pulse (pulse inhibit).

External Trigger Options
Select channels for internal/external triggering, or free-run. Triggered channels have flexible output choices: single pulse, burst at its clock rate, continuous pulse train or a series of on/off pulses (duty cycle). Contact us for custom wave trains or modes.

Individual Rates
Each channel can have individual channel rates (either T0 or any of the other channels...).

Forgot to save your settings? The Model 575 stores your setup configurations while powering down. Recall is automatic on power-up.

Dual Input Panel Connectors
The Model 575 offers two inputs for triggering or gating. User may specify electrical or optical input signals, and configure any trigger/gate combination. Use Trigger #2 to disable a triggered pulse train.

Front Panel High Voltage
Our modular architecture allows us to offer expanded functionality on user-selected front panel outputs. We offer a front panel High Voltage option ( adjustable from 35V, 200 mV steps) on 2, 4, 6 or all 8 channels.

Front Panel Optical
Many applications benefit from optical signals. For noisy environments, or communications applications, we offer an LED output stage at the front panel. This modular option can be configured for 2, 4, 6 or 8 outputs at 820nm or 1300nm.

Combined Output Types
The outputs are configured in modules and output types are combined in pairs. Thus one may select optical, standard electrical or high voltage electrical in pairs for their instrument. For example, a 8 channel unit may have optical, standard electrical and high voltage outputs all on one instrument. Custom or additional output modules may be added as the need arises. See our handy Order Chart for all option configurations.

Field Programmability
The instrument can now have functions upgraded in the field, such as a special or custom feature upgrade via a fully programmable FPGA.

Field Programmability

Customer Output Modes
Custom Modules such as the TZ-50 give users an expand list of capabilities with the Model 575. One example is our TZ-50 option, which allows customers a TTL signal into 50 ohms expanded.

Negative Delay
Use the handy negative delay feature to reference one channel with respect to another channel in positive or negative time increments. By allowing a channel to reference another channel as its trigger, you can synchronize the channels with respect to each other.

Note that Negative Delay cannot trigger a channel before your initial trigger. It is intended to compliment the channel referencing option.

NEW AT45 High Voltage Options

45V Rise, 50 Ohm, 10nS / Div

45V Rise Hi Z, 10nS / Div

***Due to the power consumption and heat restrictions, a maximum of four AT45 channels can be added on a single unit***