Multi-Channel Digital Delay Generator, 20 Channels DDG

Q: Model 745T-20C | What if I need more than 20 channels of timing in my system?

The Model 745T-20C offers 20 channels per enclosure and can be daisy chained with additional units to a single trigger. However, for complex multi-channel applications, contact the factory. We can offer a custom card-level solution which may be more cost effective.

745T-20C | 20-Channel Picosecond Digital Delay Generator

Model 745T-20C Twenty (20) Channel Digital Delay Generator

The Model 745T-20C Digital Delay Generator provides users with an amazing twenty independent channels of pulse delay and width. This multi-channel Digital Delay Generator provides delay resolution of 100 picoseconds (ps) with an optional 1 picosecond (ps) resolution. The jitter is less than 25 ps with internal or external triggers.

Features

Specifications

Options

Tech Resources

Media

Downloable Resources

Price List

FAQ

Overview

Quick Specs

Channels: 20 Independent Channels
Resolution: 100 ps (standard)
Accuracy: < 250 ps + delay x 10^-7
Jitter: 25 ps (T0 to any Output)
Jitter: 50 ps (Ext Trig IN to any Output)
Voltage: 2 to 5 V, step < 0.1 V / 50 Ω
Memory: 4 Sets of Parameters

Applications

Large Area Timing
Multiple Outputs
Explosive Testing
Precision Laser and Camera Timing
High Precision Pulse/Gate Application

The Model 745T-20C delivers up to 6 V into 50 Ω, meeting all TTL applications. The levels are adjustable on a channel-by-channel basis giving you complete time and amplitude domain control. The fast outputs, with risetimes of 1 ns, are on the rear panel for an elegant look for complex experiments. The front panel controls are accessed by a touchscreen interface with several programming options (Ethernet, etc) for remote control.

All parameters (delay/amplitude/width/trigger) may also be controlled with an embedded GUI that opens in an HTML browser such as Internet Explorer, Firefox, or Chrome at 10 or 100 Mb/s rates.

The Model 745T-20C is uniquely suited to gate, delay, pulse and synchronize many experiments in the nanosecond and picosecond domain. The space saving, reduced calibration costs, and simple control of so many channels are ideal for users of multiple channels of timing.

Triggering

The Model 745T-20C Digital Delay Generator offers users several options for triggering timing channels: External, Internal and Remote. Externally trigger on the positive slope. The internal rep rate generator may be started by front panel pushbutton or remotely via your software interface. Either trigger mode may be set in one-shot or repetitive.

Expand to 40 or 60 channels

The Model 745T-20C can be expanded to provide up to 60 channels, all with the same high performance. *Note: external triggering is not available for 40 / 60 channels.

Specifications

Delays

Number of Channels	20 independent delay outputs
Range	0 to 10 s
Resolution	100 ps (standard) 1 ps (option 4)
RMS Jitter	25 ps (T0 to any output)
Accuracy	< 250 ps + delay x 10^-7
Time Base	0.05 ppm stability

Trigger Source

Internal	3 generators 0.1 Hz to 10 kHz in 1-2-5 sequence
External	Rate up to 50 kHz, 1 V/50 Ω Threshold, slope positive; 5 ns minimum pulse width
Command	2 Single Shots

Outputs T1 to T20

Amplitude	Adjustable 3 V to 6 V into 50 Ω
Rise/Fall time	5 ns/ 5 ns
Width	100 ns to 300 ms
Polarity	Active Low / Active High
Connector	BNC
Clock Input (1)	10 MHz to 100 MHz (customer choice fixed input)

General

Interface Control	Front panel, Ethernet / Internet (web page or SCPI)
Software	Free Drivers
Dimension Weight	Rack 19″ 2U 19″W x 3.5″H x 12″D [48.25mm x 8.9mm x 30mm] *with mounting ears 22 lbs [10 kg]
Power	Autovolt 90 to 220 Vac / 0.5 Amp
Shipping Dimensions	24x19x12″
Shipping Weight	25 lbs

Options

Option 1	Output 10 V (2) Amplitude = 2.5 V to 10 V, rise/fall time = 1 ns/3 ns into 50 Ω, width = 100 ns to 10 ms
Option 2	Output 20 V (2) Amplitude = 5 V to 20 V, rise/fall time = 3 ns/15 ns into 50 Ω, width = 0.1 us to 10 us
Option 3	Output 32 V (2) Amplitude = 32 V Fixed, rise/fall time = <3 ns/ <15 ns into 50 Ω, width = 1 us Fixed
Option 4	1 ps Delay Resolution [<10 ps RMS Jitter from T0 to Ch 1 to 10 and < 20 ps Jitter from T0 to Ch 11 to 20
Option 5	Optical Output [850 nm with ST Connector]
Option 6	Clock Input and Output Frequency 10 MHz to 100 MHz
Option 7	40 Channels — Two 745T-20 Synchronized and fine tuned at factory

Example How to Configure

Step 1: Choose Resolution	100 ps or 1 ps
Step 2: Choose Clock Frequency	10 MHz or 100 MHz or custom*
Step 3: Choose Output Frequencies	*dependent on Clock Frequency
Step 4: Choose Output Pulse Amplitude	TTL (Standard) 2.5 V to 10 V, Square 5 V to 20 V 32 V (4 Channel Max)

Technical Resources

Model 745T-20C Datasheet

Frequently Asked Questions (FAQ)

Model 745T-20C | What if I need more than 20 channels of timing in my system?

The Model 745T-20C offers 20 channels per enclosure and can be daisy chained with additional units to a single trigger. However, for complex multi-channel applications, contact the factory. We can offer a custom card-level solution which may be more cost effective.

Downloadable Resources

Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our downloads page.

Media

Playlist