mesytec
STM-16+
16 fold shaper with timing
mesytec GmbH & Co. KG
wernher-von-braun- str. 1, 85640 putzbrunn, germany
fon: +49 - 89 / 456007-30, fax : +49 - 89 / 456007-50
info@mesytec.com - www.mesytec.com
2/6
Technical Data:
Input stage
• Gain adjust: gain can be set from 1 to 20 in
16 steps with factor 1.22 per step.
differential version
• Input connector: 34 pin male connector
• Input resistance: terminated with 100 Ω,
adapted to twisted pair cables.
• Gain-Polarity jumper with multiplication
factor of 2 and 30 are standard. (Gain
range from 2 to 600)
• input noise at gain = 100: 10 µVrms for
1us shaping time, 7
µVrms for 2 µs
shaping time.
• Common mode suppression: 50 dB
unipolar version
• 16 Lemo 00 input connectors
• Input termination option: 1k and 50
Ohm, coded on the gain-polarity
jumper.
• Gain-Polarity jumper with multiplica-
tion factor 2 and 30 are standard. Op-
tion: multiplication factor 1.
• input noise at gain = 100 and 2 µs
shaping time = 7
µVrms.
Shaper:
•
PZ adjustable with trimmers inside the
case from 8
µs to infinity.
•
Two shaping times of 0.4
µs / 1 µs or
2
µs / 5 µs jumper selectable, common
for all channels.
• Output amplitude: 0 to 10 V
• Passive baseline restorer
• DC-Offset: VDC ± 5 mV, common offset
adjust.
• Output connector: 34 pin male connector
• Integral nonlinearity < 0.05%
• gain drift < 0.0075% / °C
• Offset drift < 50 µV/ °C
Timing filter amplifier:
• RC-CR, 7 ns / 100 ns
• 4 monitor outputs for timing filter signals,
each providing the sum signal of 4 channels
(Amplitude: -1.5 V per channel for 10 V
shaper output)
Discriminator:
• Leading edge
• Threshold: adjustable, 0 to 4 V (= 0% to
40% of maximum range)
Gate generator, Timing delay, ECL output
• Pulse width for trigger output: 400 ns
• Timing stop- ECL-Signals:
delay 400 ns from trigger,
width 200 ns
• Output connector: 34 pin male connector
• Typical timing resolution for 5 MeV signals
from silicon detector (10 * 10 mm
2, 500
µm, 60V bias): dT = 400 ps. If necessary, a
walk correction can be easily implemented
in software using the shaper amplitude.
Multiplicity trigger:
• Each channel above threshold contributes to
multiplicity level, a multiplicity trigger is
generated for: lower multiplicity threshold
≤ multiplicity level ≤ upper multiplicity
threshold
• coincidence interval adjustable from 40 ns
up to 150 ns (default 100 ns).
• The multiplicity trigger is 100 ns delayed to
the trigger signal.
• Lower multiplicity threshold: 1 … 8, upper
multiplicity threshold: 1 … 8 and
∞
• Multiplicity chaining: multiplicity outputs
from several modules can be connected, re-
sulting in a total multiplicity level of all
connected modules. Multiplicity trigger
windows of the connected modules act in-
dependently on the total multiplicity.
Power consumption: (max 7W)
• +6V 280 mA
• -6V –680 mA
• +12V 80 mA
Remote control
The modules are prepared for the remote con-
trol of
1) individual thresholds
2) gains for pairs of channels.
The remote control unit is a plug in module
which can also be inserted as an upgrade.
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