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
4
1. Module description
1.1. Overview
The
Model V993 B
Dual Timer is a 1-unit VME module housing two identical triggered
pulse generators.
The module produces NIM, TTL and ECL pulses whose width ranges from 50 ns to 10 s
when triggered. Output pulses are provided normal (
OUT
) and negated (
/OUT
).
Timers can be re-triggered with the end marker signal.
The coarse adjustment of the output width is provided via a 9-position rotary switch, the
fine adjustment can be performed via either a rotary handle or by providing an external
voltage (
WSET
).
The trigger
START
can be provided via either an external signal (NIM, TTL or ECL) or
manually via a front panel switch (
START/RESET
switch).
The
VETO
input (NIM, TTL or ECL TRUE level) allows to disable the START operation.
The
ENDM
output (NIM, TTL or ECL) is a short pulse produced at the end of any timing
cycle.
The
RESET
input (NIM, TTL or ECL) ends the timing cycle at any time. RESET can also
be provided manually via a front panel switch (
START/RESET
switch).
See § 2.4 for details about signals.
The module features LEMO 00 connectors for WSET and NIM/TTL signals and male pin
couples for ECL signals. Two front panel LEDs display when the module is operating.
The board is equipped with the P1 connector.
Two internal switches allow to select between NIM and TTL output pulses, while input
levels are automatically recognised (no selection is required).