The Stanford Research Systems DG535 is a digital delay and pulse generator providing four precisely-timed logic transitions or two independent pulse outputs. It features a 5 ps delay resolution, very low jitter, and a wide delay range of up to 1000 seconds, making it an industry standard for laser timing systems, automated testing, and precision pulse applications.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB |
| Display | 20-character backlit LCD |
| Instrument Setup Memory | 9 non-volatile instrument setups |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100, 120, 220, or 240 VAC, 50/60 Hz, 70 W |
| Operating Temperature | 0 to +50 |
| Dimensions (W×H×D) | 356 × 89 × 356 |
| Weight | 4.5 |
Delays
| Parameter | Value |
|---|---|
| Number of Delay Channels | 4 (A, B, C, D) |
| Delay Range | 0 to 1000 s |
| Delay Resolution | 5 ps |
| Insertion Delay | ~85 ns (external trigger to T0) |
| Delay Linking | Channels can be linked to T0 or any other delay channel |
Internal Rate Generator
| Parameter | Value |
|---|---|
| Trigger Rate Range | 1 mHz to 1 MHz |
| Rate Resolution | 4 digits |
| Triggering Modes | Internal, External, Single-shot, Burst, AC Line |
Front Panel Outputs
| Parameter | Value |
|---|---|
| Available Output Types | TTL, ECL, NIM, Variable |
| Variable Amplitude Range | -3 V to +4 V |
| Amplitude Resolution | 10 mV |
| Maximum Output Transition | 4 V |
| Output Impedance Limits | 50 Ω or High-Z termination |
Timebase and Reference
| Parameter | Value |
|---|---|
| Standard Oscillator Type | Crystal oscillator |
| Standard Oscillator Stability | 25 ppm |
| Optional Oscillator Type | TCXO (Temperature Compensated Crystal Oscillator) |
| Optional Oscillator Stability | 1 ppm |
Triggering
| Parameter | Value |
|---|---|
| External Trigger Threshold | ±2.56 V (10 mV resolution) |
| External Trigger Slope | Positive or negative |
Performance
| Parameter | Value |
|---|---|
| Trigger to T0 Jitter | 2.5 ns rms |
Timebase
| Parameter | Value |
|---|---|
| Internal Timebase Frequency | 10.0 MHz |
| External Timebase Input | 10.0 MHz (typical 1 Vpp) |
Outputs
| Parameter | Value |
|---|---|
| Front Panel Outputs | T0, A, B, C, D, AB, -AB, CD, -CD |
| TTL Output Level | 0 to 4 VDC (nominal into 50 Ω or high impedance) |
| ECL Output Level | -1.8 to -0.8 VDC (into 50 Ω) |
| NIM Output Level | -0.8 to 0 VDC (into 50 Ω) |
Technology
Digital Delay Generation
Applications
Laser timing, automated testing, precision pulse applications