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Berkeley Nucleonics Corporation (BNC)
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  5. Berkeley - Model 577 - 0.001 Hz to 20 ...

Berkeley - Model 577 -0.001 Hz to 20 MHzDigital Delay / Pulse Generator

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The Model 577 digital delay generator provides multi-channel 250 ps-resolution timing, delaying, gating, pulsing, and synchronizing functions at an attractive price. In addition to the traditional digital delay and pulse generator modes, there are many practical modes of operation and features. For usefulness and value, there is nothing comparable.

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Each channel provides both delays and widths – a 4-channel Model 577 provides the same delay and width functionality of competitive 8-channel units. The Model 577 is available in 4 and 8 channel configurations, with optional Ethernet and GPIB communication, High Voltage and Optical outputs, optical inputs for trigger and gate and Dual Input Trigger options for both optical or electrical inputs.

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, with both internal clocks (50 ps) and using an external trigger (800 ps) gives 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 with a 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 577, which offers much more, including 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.

Channel Multiplexing

One of the more unique features of the Berkeley Nucleonics pulse generators is the ability to combine the timing of any or all channels together and output them out of any of the output BNCs. The multiplexing function (MUX) can be set through remote communications via a computer or from the front panel of most units.

Selectable Clock Reference

The Model 577 offers additional inputs and outputs for external clock synchronizing. Specify your input/output reference frequency (10 MHz to 100 MHz). Synchronize with the Mode Lock Oscillator of a laser or phase lock multiple units with one clock.

Flexible Gating Options

The Model 577 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...).

Auto-Save

Forgot to save your settings? The Model 577 stores your setup configurations while powering down. Recall is automatic on power-up.

Dual Input Panel Connectors

The Model 577 offers two inputs for triggering or gating. You 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 offers 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, an 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 helpful 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.

Custom Output Modes

Custom Modules such as the TZ-50 give users an expanded list of capabilities with the Model 577. One example is our TZ-50 option, which provides customers a TTL signal into 50 ohms expanded.

Negative Delay

Use the convenient 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: The Negative Delay cannot trigger a channel before your initial trigger. It is intended to complement the channel referencing option.

Standard Input/Output Configuration

  • Model: Number of Independent Outputs
  • 577-4C: 4 Channels
  • 577-8C: 8 Channels

OUTPUT MODULE (AT20)

  • TTL Mode :
    • Output/Source Impedance: 50 Ω
    • Output Level: 4.0 V (typical) into 1 kΩ
    • Rise Time (10% - 90%):
    • Jitter: 50 ps RMS channel to channel
  • Adjustable Mode:
    • Output Level: 2 V to 20 VDC into 1 kΩ or 1 V to 10 VDC into 50 Ω
    • Amplitude Resolution: 10 mV
    • Current: 200 mA typical, 400 mA (short pulses)
    • Rise Time (10% - 90%): 15 ns (typical) @ 20V into Hi-Z (25 ns typ @ 10V into 50 Ω)
    • Slew Rate: > 0.1V/ns
    • Overshoot: < 1 V + 10% of pulse amplitude

INPUT MODULE (IA15)

  • Trigger Input:
    • Function: Generate individual pulses, start a burst or continuous stream
    • Rate: DC to 1/ (200 ns + longest active pulse). Maximum of 5 MHz
    • Slope: Rising or Falling
    • Threshold: 200 mV to 15 VDC
    • Maximum Input: 60 V Peak
    • Resolution: 10 mV
    • Trigger Accuracy: ±3% of Threshold Voltage
    • Impedance: 5.3 kΩ + 40pF
    • Trigger Jitter: < 20 ns RMS
    • Insertion Delay: < 110 ns
    • Minimum Pulse Width: 20 ns
    • Pulse Inhibit Delay: < 150 ns RMS
    • Output Inhibit Delay: < 100 ns RMS
  • Gate Input:
    • Mode: Pulse or Output inhibit
    • Polarity: Active High or  Active Low

FEATURES

  • User Setting Storage: 16 Memory Location
  • USB: USB 1.0 Standard
  • RS-232: DE-9 Connector using RS-232 Communications Standard
  • External Clock In: 10 MHz – 100 MHz user selectable in discrete values
  • External Clock Out: To or Ref out (10 to 100 MHz) user selectable in discrete values

PHYSICAL and ENVIRONMENTAL

  • Dimensions: 10.5” x 8.25” x 5.5” [267 x 210 x 140mm]
  • Weight: 8 lbs [3.6 kg]
  • Power: 100 - 240 VAC 50/60 Hz
  • Fuse: 3.15 A, 250 V Time-lag (Qty 2)
  • Operating Temp: 32 - 104°F [0 - 40°C]
  • Transportation & Storage Temp: -40 - 158°F [-40 - 70°C]

Internal Rate Generator

  • Rate (T0 period): 0.001 Hz to 20.000 MHz (1000 s – 50 ns)
  • Resolution: 5 ns
  • Accuracy: 5 ns + (0.0001 x period)
  • T0 Period Jitter: < 500 ps RMS
  • Time Base: 200 MHz, low jitter PLL
  • Oscillator: 50 MHz, 50 ppm crystal oscillator
  • System Output Modes: Single, Normal, Burst, Duty Cycle, External Gate/Trigger
  • Burst Mode: 1 to 10,000,000 pulses
  • Duty Cycle Mode: 1 to 10,000,000 pulses ON and/or OFF
  • Pulse Control Modes: Internally triggered, externally triggered or external gate.

Channel Timing Generator

  • Pulse Width Range: 10 ns -1000 s
  • Width Accuracy: 1 ns + 0.0001 x width setting
  • Width Resolution: 250 ps
  • Pulse Delay Range: 0 - 1000s
  • Delay Accuracy: 1 ns + 0.0001 x delay setting
  • Delay Resolution: 250 ps
  • Jitter (channel to channel): < 250ps RMS
  • Output Multiplexer: Any/all channels may be OR’d to any/all outputs.
  • Time Base: Same as the internal rate generator
  • Channel Output Modes: Single, Normal, Burst, Duty Cycle
  • Burst Mode: 1 to 10,000,000 pulses
  • Duty Cycle Mode: 1 to 10,000,000 pulses ON and/or OFF
  • Wait Counts: 1 to 10,000,000 pulses
  • Channel Control Modes: Internally triggered or external gated. Each channel may be independently set to either mode.

Output Module Options

  • Option L82 or Option L130 - Optical Outputs
    • Wavelength: 820 nm or 1300 nm
    • Maximum Signal Rate: 5 MBd
    • Maximum Link Dist.: 1.5 km
    • Connector Type: ST
  • Option TZ50 - TTL 50 Ω Output Impedance
    • TTL/CMOS Mode:
      • Output Level: 4.0 V typ into 50 Ω
      • Rise Time:
      • Slew Rate: 0.5 V/ns
      • Jitter - Channel to Channel: 50 ps RMS
    • Adjustable Mode:
      • Output Level: 2 V to 20 VDC into 1 kΩ or 1 V to 10 VDC into 50 Ω
      • Amplitude Resolution: 10 mV
      • Current: 200 mA typical, 400 mA (short pulses)
      • Rise Time (10% - 90%): 15 ns (typical) @ 20V into Hi-Z (25 ns typ @ 10V into 50 Ω)
      • Slew Rate: > 0.1V/ns
      • Overshoot: < 1 V + 10% of pulse amplitude
  • Option AT35 - 35V Adjustable Output
    • TTL/CMOS Mode:
      • Output Level: 4.0 V typ into Hi-Z
      • Rise Time:
      • Slew Rate: 0.5 V/ns
      • Jitter - Channel to Channel: 50 ps RMS
    • Adjustable Mode:
      • Output Amplitude: 5 V – 35 V into 50Ω load at 200 Hz
      • Resolution: 10 mV
      • Rise Time (10% - 90%): < 30 ns
      • Accuracy: 500 mV
      • Max. Frequency (Internal & External): 4 kHz
  • Option TZ35 - TTL 50 Ω Output Impedance + 35V Adjustable Output
    • TTL/CMOS Mode:
      • Output Level: 4.0 V typ into 50 Ω
      • Rise Time:
      • Slew Rate: 0.5 V/ns
      • Jitter - Channel to Channel: 50 ps RMS
    • Adjustable Mode:
      • Output Amplitude: 5 V – 35 V into 50Ω load at 200 Hz
      • Resolution: 10 mV
      • Rise Time (10% - 90%): < 30 ns
      • Accuracy: 500 mV
      • Max. Frequency (Internal & External): 4 kHz
  • Option AT45 - 45V High and Low Impedance
    • Amplitude: 4 V - 45 V
    • Resolution: 20 mV
    • Accuracy: +/-1.5%
    • Rise Time (10%-90%):
    • < 2ns (typical) into 50 Ω /  < 9ns (typical) into Hi-Z
    • Fall Time (90%-10%):
    • < 9ns (typical) into 50 Ω  / < 9ns typical into Hi-Z
    • Frequency (Internal & External): DC – 100 kHz
    • Overshoot: < 35% Typical for Fast Rise Time
    • Polarity - Hi-Z (>10k): Active High or Active Low
    • Polarity - (50 Ω): Active High Only
    • Pulse Width Range - Hi-Z (>10k): 10 ns to DC
    • Pulse Width Range - 50 Ω: 10 ns to 10 s
    • Max Current: 35 mA (Hi-Z @10 ms width) / 900 mA (50 Ω @ 10 ms width)

AT45 NOTE:

*   Due to the power consumption and heat restrictions, a maximum of four AT45 channels can be installed on a single unit
**  Deletes TTL and ADJUSTABLE mode selection and replaced by LOW and HIGH Impedance selection

Input Module Options
Option IL82 or Option IL130 - Optical Inputs

  • Wavelength: 820nm or 1300nm
  • Maximum Signal Rate: 5 MBd
  • Maximum Link Dist.: 1.5 km
  • Connector Type: ST
  • Insertion Delay: < 300 ns
  • Jitter: < 1.4 ns RMS

System Options

  • DT15: Dual Trigger. Enable Gate Input to act as second trigger
  • COM: Extended Communications – Adds Ethernet & GPIB
  • EU: Replace North American Cord wirh European Cord