Singal Input
| Bandwidth | dc to 250 MHz |
| Input impedance | 50 Ohms |
| Linear range | +/- 300 mV |
| Input protection | +/- 5 Vdc, 50 V for 1 microsecond |
Discriminator
| Discriminator range | -300 mV to +300 mV |
| Discriminator slope | Rising or falling |
| Resolution | 0.2 mV |
| Input offset voltage | 1 mV |
| Minimum pulse input | 10 mV |
| Pulse pair resolution | 5 ns |
| DISC output | NIM levels into 50 Ohms |
Trigger Input
| Impedance | 10 ohms |
| Threshold | -2 V to 2 V |
| Slope | Rising or Falling |
| Protection | 15 VDC |
Internal Time Bins
| Bin width | 5, 40, 80, 160, ... ns, 10.486 ms |
| Accuracy | 1 ns |
| Jitter | 100 ps + 10 ppm of delay |
| Accuracy | 2 ns +1% |
Counter/Accumulation
| Bins per record | 1k to 16k in 1k increment |
| Max count rate | 100 MHz |
| Max count | 32,767 per bin per trigger |
| Records per accumulation | 1 to 64k (or free run) |
Trigger
Rate
Minimum period between
triggers
Tp = record time + accumulation time + overhead
= (no. of bins x bin width) + (no. of bins x 250
ns)
+ 150 microseconds
Outputs
DISC = Nim level into 50 ohms
How
to use
a multichannel scaler/averager
?
External trigger <--- 以BNC, 50 Ohm coaxial cable
from the
output port of the pulse/delay generator or photodiode device
Input
<--- 以BNC, 50 Ohm coaxial cable
from the output
port of the MCP unit
Set proper discrimination level，sampling
time，bin width，number of channel,
etc.。
