BNC Model 575, Digital Delay and Pulse Generators

DESCRIPTION

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. 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.

 

FEATURES

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 complement 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***

 

SPECIFICATIONS

DELAYS

Range0-1000 s
Resolution250 ps
Timebase25 ppm
RMS Jitter200 ps
Pulse Inhibit Delay120 ns
Output Inhibit Delay50ns

SYSTEM EXTERNAL TRIGGER INPUT

Number2|1
RateDC to 1/(200ns + longest delay) maximum of 5MHz
Threshold0.2 to 15 VDC
Max Input Voltage60 V Peak
Resolution10 mV
SlopeRising or Falling
Impedance1 M ohm + 40 pF or 50 ohm
Jitter800 ps RMS
Insertion Delay120 ns

GATE INPUT(S)

Number0|1
Threshold0.2 to 15 VDC
Max Input Voltage60 V Peak
Resolution10 mV
PolarityActive High/Active Low
FunctionPulse Inhibit or Output Inhibit
Channel BehaviorGlobal w/ Individual Channel Enables

INTERNAL RATE GENERATOR

Rep Rate0.001 Hz to 10.000 MHz (1000 s - 100 ns)
Resolution5 uS
AccuracySame as timebase
Jitter50 ps
Setting1 cycle
Burst Mode1 to 10,000,000

TTL/ ADJUSTABLE OUTPUTS

Number of Channels2, 4 or 8 Outputs
ImpedanceHigh Impedance
Pulse Width Range10 ns - 1000 s
TTL Rise Time (10% - 90%)3 ns typical
Adjustable Slew Rate 0.1 V/ns
Overshoot< 100 mV + 10% of pulse amplitude
LevelsTTL 4 VDC into Hi-Z

Adjustable amplitude, 2.0 to 20.0 VDC into Hi-Z; 10 mV resolution

ELECTRICAL OUTPUTS

Number0, 2, 4 or 8
RateDC to 1(0.2 us + longest delay)
Threshold0.2 to 15 VDC
Max Input Voltage60 V Peak
Resolution10 mV
Impedance1 M ohm + 40 pF or 50 ohm
Function(s)Individual Channel Trigger Gate/ Follower
Trigger SlopeRising or Falling
Gate PolarityActive High or Active Low
Trigger Jitter< 2 ns

OPTICAL OUTPUTS

Number0, 2, 4, or 8
Wavelength820 nm or 1300 nm
Max Signal Rate5 M Bd
Max Link Distance1.5 km
Connector TypeST
Resolution500 ps
Accuracy1 ns + .0001 x delay

OPTICAL INPUTS

Number0 or 2
Wavelength820 nm or 1300 nm
Max Signal Rate5 Mbd
Max Link Distance1.5 km
Connector TypeST
Resolution500 ps
Accuracy2 ns + .001 x delay
Optical Trigger2412
Trigger Delay< 300 ns
Jitter< 15 ns

STANDARD FEATURES/ FUNCTIONS

CommunicationsUSB / RS232
Global Gates/Triggers2 Global Gate/Trigger Inputs
Channel Gates/TriggersOptical/Electrical available (5 ns Jitter)
External Clock in10 MHz - 100 MHz (User Selectable in discrete values)
External Clock out10 MHz - 100 MHz (User Selectable in discrete values)
Command Set CompatibilityBackwards Compatible


Options

 

Summary of Electrical Outputs

  • AT20 – The standard 575 provides a selectable TTL or 20V into a high impedance from a 50 Ω 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, or all 8 channels to get TTL levels into 50 Ω. The standard output provides 4V pulses from 50 ohms which becomes 2V into a 50 Ω load. The TZ50 provides 4V into 50 Ω. The risetime is 3 ns.
  • AT45 – Choose this option to get 45V into 50 Ω. This option provides an adjustable 3-45V pulse into 50 Ω. 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, or all 8 channels. This gives you 35V into 50 Ω. This option provides an adjustable 35V pulse into 50 Ω. The risetime is 30 ns.
  • TZ35 – This is a combination of AT35 and TZ50 module. Order 2, 4, or all 8 channels. This gives you 35V into 50 Ω and TTL (4V) into 50 Ω. This option provides an adjustable 35V pulse into 50 Ω. The risetime is 30 ns.

 

Summary of Optical Outputs

  • 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

We offer BNC pulse generators only if end users are in Europe, other customers please contact BNC directly.

Price-Info/Quotation/Questions