Document type:
Title:
Revision date:
Revision:
User's Manual (MUT)
Mod. V812 16 Channel Constant Fraction Discriminator
20/04/2009
4
NPO:
Filename:
Number of pages:
Page:
00101/97:V812x.MUTx/04 V812_REV4.DOC
23
12
current output (-1 mA
±
20% per hit), high impedance.
Rise/fall time < 8 ns.
Max output frequency: 30 MHz
MAJORITY OUTPUT:
Mechanical specifications:
1 LEMO 00 type connectors.
Electrical specifications:
Standard NIM logic signal, 50
Ω
impedance.
2.5. Other
components
2.5.1. Displays
The front panel hosts the following LEDs:
DTACK
Type: 1 green LED
Function: VME selected; it lights up during a VME access.
OR
Type: 1 green LED
Function: it lights up if at least one output signal is present.
2.5.2. Switches
ROTARY SWITCHES
Function: they allow to select module’s VME address; please refer to Fig. 2.2 for their setting.
2.5.3. Jumpers
JP1
Function: it allows to select the Majority logic (Internal, External); please refer to Fig. 2.3 for the
jumper location on the V812 board.
JP2…JP17
Function: they allow to set the Delay. The Delay values range up to 20 ns with 4 ns steps
(please refer to Fig. 2.3 for the jumpers location on the V812 board). Factory setting is 20 ns.
Optionally is also available 5ns full scale with 1ns steps, 50ns full scale with 10ns steps and
100ns full scale with 20ns steps.
