N841
16 Channel Leading Edge Discriminator
Features
- High channel density
- Individually programmable thresholds
- Selectable Updating/Non Updating mode
- Programmable Output width
- TEST and VETO inputs
- OR and Current Sum outputs
- 4 digit led display
Overview
The CAEN Mod. N841 is an 16 Channel Leading Edge Discriminator housed in one unit wide NIM module. The module accepts 16 negative inputs and produces 2×16 NIM outputs (NIM outputs are provided with a fan-out of two) + 16 / NIM outputs (negated) on front panel LEMO 00 connectors. The pulse forming stage of the discriminator produces an output pulse whose width is adjustable in a range from 5 ns to 40 ns. Each channel can work both in Updating and Non-Updating mode according to on-board jumpers position. The discriminator thresholds are individually settable in a range from -1 mV to -255 mV (1 mV step), via an 8-bit DAC. The minimum detectable signal is -5 mV. The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ω load) ±20%.
Technical Specifications
- Packaging
1U-wide NIM unit
- Threshold range
-1 mV to -255 mV (1 mV step)
- Inputs Channels
16 inputs, negative polarity, DC coupling
- Input Impedance
50 Ω
- Reflections
<4% for input pulses with a 2 ns rise time
- Interchannel isolation
>44 dB
- Max Input voltage
-5 V
- Min. detectable signal
-5 mV
- Max input frequency
110 MHz (Updating mode), 80 MHz (Non Updating mode)
- Double Pulse Resolution
7 ns (Updating mode); 12 ns (Non Updating mode)
- Test Input
- NIM signal; High impedance;
- Min. FWHM: 12 ns;
- Max. frequency: 40 MHz
- Veto Input
- NIM logic signal, high impedance
- Min. FWHM: 15 ns
- Output Channels
32 NIM (Fan-Out of 2) + 16 / NIM (single), 50 Ω Impedance
- Output Width
Out: 5 + 40 ns /Out: 6 + 41 ns
- Output Rise/Fall Time
Out: < 1.2 ns; /Out: < 2.5 ns
- Input/output delay
9 ns
- Test Input/output delay
11 ns
- Or Output
NIM signal; 50 Ω impedance
Max. frequency: 30 MHz; Min. FWHM: 10 ns
- Σ Output
-1 mA ± 20% per hit; high impedance
Max. frequency: 30 MHz; Min. FWHM: 15 ns
Compare
Compare with Discriminators.
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Accessories
- A385
- Adapter 2.54mm 34-pin female to 16x LEMO 00 female (or MCX male) – 50 cm / 1 m
Ordering Options
Code | Description |
---|---|
WN841XAAAAAA | N841 - 16 Channel Leading Edge Discriminator 50 Ohm Negative RoHS |