Stanford Research
Stanford Research SR400
Gated Photon Counter
2 independent counter channels (A and B) plus 1 discriminator channel (T) Number of Channels
200 MHz (per channel) Maximum Count Rate
DC to 200 MHz Input Frequency Range
-0.3 V to -1.0 V (NIM) adjustable threshold for each channel Discriminator Threshold Range
1 ms to 1000 s (programmable) Gate/Dwell Time Range
| Attribute | Value |
|---|---|
| Number of Channels | 2 independent counter channels (A and B) plus 1 discriminator channel (T) |
| Maximum Count Rate | 200 MHz (per channel) |
| Input Frequency Range | DC to 200 MHz |
| Discriminator Threshold Range | -0.3 V to -1.0 V (NIM) adjustable threshold for each channel |
| Gate/Dwell Time Range | 1 ms to 1000 s (programmable) |
| Input Impedance | 50 Ω |
| Counter Resolution | 32-bit counter (up to 4,294,967,295 counts) |
| Interface | GPIB (IEEE-488) and RS-232 serial interface for remote control |
| Display | Vacuum fluorescent display showing count rates and operating parameters |
| Power Requirements | 100–120 VAC / 220–240 VAC, 50/60 Hz, 30 W |
Stanford Research SR400 Options:
- SR445A - SR445A - 350 MHz preamplifier
| Model | SR400 |
|---|
The Stanford Research SR400 Dual-Channel Gated Photon Counter offers a convenient, integrated approach to photon counting that avoids the complexity and expense of older counting Systems.
