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Ratemeters Selection Guide
These charts are intended as selection guides only.
For complete and precise specifications, consult the data sheet for
each model.
| Model |
449 |
661 |
9349 |
| Type |
Log/Linear |
Linear |
Log/Linear |
Full Scale Ranges
Minimum
Maximum |
10 counts/s
106 counts/s |
25 counts/s
107 counts/s |
10 counts/s
106 counts/s |
| Input
Types |
± Logic pulses, >3 V high and >50 ns wide |
Positive discriminator; Negative NIM |
Negative NIM >4 ns wide |
|
Pulse-Pair Resolution |
<100 ns, or <1% of average pulse spacing |
<40 ns |
<100 ns, or <1% of average pulse spacing |
| Audible
Output |
449-2 option |
No |
No |
| Recorder
Output |
Yes |
Yes |
Yes |
| Package
and Width |
Nim-2 |
NIM-1 |
NIM-2 |
| Special
Feature |
0 to 100% zero suppression |
Fast Response circuit |
0 to 100% zero suppression |
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