Document type: Title: Revision date: Revision:
User's Manual (MUT) Mod. V993 B Dual Timer 03/03/2004 3
NPO: Filename: Number of pages: Page:
00114/00:V993x.MUTx/03 V993B_REV3.DOC 10 7
2.4. Signals features1
START INPUT: Signal features:
NIM: Leading edge sensitive, 2.5 ns minimum FWHM on
LEMO 00 type connector
TTL: Leading edge sensitive, 1.5 ns minimum FWHM on
LEMO 00 type connector
ECL: Leading edge sensitive, 2.5 ns minimum FWHM on a
male pin-couple
START/RESET Switch2: Momentary switch for single cycle
operation
Function:
Timer triggering signal
VETO INPUT: Signal features:
NIM/TTL: TRUE level (within ±2 ns of START leading edge)
on LEMO 00 type connector
ECL: TRUE level (within ±2 ns of START leading edge) on a
male pin-couple
Function:
It disables triggering
RESET INPUT: Signal features:
NIM/TTL: Leading edge sensitive, 3 ns minimum FWHM on
LEMO 00 type connector
ECL: Leading edge sensitive, 3 ns minimum FWHM on a
male pin-couple
START/RESET Switch2: Momentary switch
Function:
It stops the timing cycle at any time. After a RESET the
module is at rest until the next START.
ENDM OUTPUT: Signal features:
NIM: 8 ns wide on LEMO 00 type connector
TTL: 10 ns wide on LEMO 00 type connector
ECL: 8 ns wide on a male pin-couple
Function:
It marks the end of the timing cycle
OUT: Signal features:
NIM: 50 ns to 10 s wide, 2 ns rise/fall time, Fan-Out of 2 on
LEMO 00 type connectors
TTL: 50 ns to 10 s wide, 4.5 ns rise/fall time, Fan-Out of 2 on
LEMO 00 type connectors
ECL: 50 ns to 10 s wide, 2 ns rise/fall time, male pin-couple
Function:
Output pulse
/OUT: Signal features:
NIM: 50 ns to 10 s wide, 2 ns rise/fall time, Fan-Out of 2 on
LEMO 00 type connectors
1All ECL inputs are 110 Ωterminated, all NIM/TTL inputs are 50 Ωterminated
2START and RESET share the same 3-position switch: Left →RESET, Middle →NEUTRAL
(stable), Right →START
