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Model 1182
Amplifier-Discriminator
Features:
- ECL and TTL outputs
- 20 ns pulse pair resolution
- Adjustable threshold
- Adjustable output pulse width
- 20 ns pulse pair resolution
This unit is a simple, low-cost, but high-performance threshold level
discriminator. When the input signal passes in a negative going sense
through the threshold voltage, which can be preset in the range -150 ?V
to -500 ?V, it generates an output pulse. The pulse width is
adjustable over the range 10 ns to 75 ns, and the pulse output
can be set to either ECL and TTL making it suitable for use with all
photon counters, as well as with multichannel scalers when performing
signal averaging measurements. It can also be used with our model 3820
Universal Counter to make a simple, low-cost, photon counting system.
The module also includes a bias current monitor, allowing the direct
measurement of PMT anode current, and its sensitivity is such that the PMT
can be operated at the beginning of the "plateau" on the curve
of observed count rate versus photomultiplier high voltage. This allows
operation with PMT gains as low as 2 x 10E5
It has been designed to drive long cables and can therefore be used in
locations remote from the counting electronics. The model 1182 has high
immunity to RFI which means it can be used near plasma furnaces or in
other applications where radio frequency interference is a problem.
| Input |
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Impedance |
50 W |
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Pulse Polarity |
Negative |
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RMS Noise Equivalent |
15 ?V |
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Pulse Dynamic Range |
150 ?V to 50 mV |
| Discriminator Output |
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Pulse |
ECL or TTL into 50 W |
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Pulse Width |
10 to 75 ns adjustable |
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Pulse Polarity |
TTL +ve
ECL -ve |
| Pulse Pair Resolution |
Output pulse width plus 10 ns |
| Input and Output
Connectors |
BNC |
| Power |
+12 V at 150 mA
-12 V at 150 mA
The Model 1182/99 power supply is available to power this
unit. 110 / 220 V AC input. |
| Power Connector |
9-pin "D" style |
| Dimensions (excluding
connectors) |
4.25" wide x 7.25" long x
1.75" high
(108 mm wide x 184 mm long x 44 mm high) |
| Weight |
14oz (383 g) |
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is
a trademark of AMETEK, Inc.