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.
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.
OVERVIEW
| Quick Specs | Applications |
| Channels: 20 Independent ChannelsResolution: 100 ps (standard)Accuracy: < 250 ps + delay x 10-7Jitter: 25 ps (T0 to any output)Voltage: 2 to 5 V, step < 0.1 V / 50 ΩMemory: 4 Sets of Parameters | Large Area TimingMultiple OutputsExplosive TestingPrecision Laser and Camera TimingHigh 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.
SPECIFICATIONS
DELAYS
| Number of Channels | 20 independent delay outputs |
| Range | 0 to 10 s |
| Resolution | 100 ps (standard)1ps (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 [10kg] |
| Power | Autovolt 90 to 220 Vac / 0.5 Amp |
OPTIONS
| Option 1 | Output 10V (2) Amplitude = 2.5V to 10V, rise/fall time = 1ns/3ns into 50 Ω, width = 100ns to 10ms |
| Option 2 | Output 20V (2) Amplitude = 5V to 20V, rise/fall time = 3ns/15ns into 50 Ω, width = 0.1us to 10us |
| Option 3 | Output 32V (2) Amplitude = 32V Fixed, rise/fall time = <3ns/ <15ns into 50 Ω, width = 1us Fixed |
| Option 4 | 1ps Delay Resolution [<10ps RMS Jitter from T0 to Ch 1 to 10 and < 20ps 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 754T-20 Synchronized and fine tuned at factory |
Example How to Configure
| Step 1: Choose Resolution | 100ps or 1ps |
| Step 2: Choose Clock Frequency | 10MHz or 100MHz 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, Square5 V to 20 V32 V (4 Channel Max) |