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VT120
Fast-Timing Preamplifier
vt120.jpg (17888 bytes)
 
  • For amplification of signals with very fast rise times from microchannel plates, photomultiplier tubes, and silicon detectors
  • £1 ns rise time
  • Output drives -5 V into 50 W
  • Compact preamplifier box for operation close to the signal source
  • £20 µV rms equivalent input noise
  • Gain of (A) 200, (B) -200, or (C) 20
The Model VT120 Fast-Timing Preamplifier is a high-performance, wide-bandwidth preamplifier designed for boosting very fast linear signals from microchannel plates, photomultipliers, electron multipliers, silicon detectors and other detectors used in fast timing applications. The rise time on all versions is <1 ns with a 5-V output, enabling excellent timing resolution.
The Model VT120 is a single-channel unit in a small preamplifier package. It is available with a gain of 200, noninverting (A version); a gain of 200, inverting (B version); or a gain of 20, noninverting (C version). BNC connectors are used for signal connections on the Model VT120. A cable is available (Model C-VT120) for connecting power between the Model VT120 and conventional preamplifier power outputs using Amphenol-type 17-80090 connectors.

PERFORMANCE
GAIN (10% gain tolerance on all versions):
A Version 200, noninverting
B Version 200, inverting
C Version 20, noninverting
RISE TIME £1 ns
NOISE £20 µV rms equivalent input noise
BANDWIDTH 10 to 350 MHz
OUTPUT RANGE 0 to -5 V with 50-W load.
INPUT BNC connector; input impedance 50 W
OUTPUT BNC connector; 0 to -5 V output with a 50-W load. Output impedance £1 W, ac-coupled.

ELECTRICAL AND MECHANICAL
POWER REQUIRED +12 V, 50 mA (uses LEMO power connector that is compatible with accessory cable C-VT120).
DIMENSIONS Aluminum housing 5.8 x 5.1 x 1.6 cm (2.3 x 2.0 x 0.63 in.).
WEIGHT
Net 0.2 kg (0.4 lb)
Shipping 1.1 kg (2.4 lb)

ORDERING INFORMATION
To order, specify:
Model Description
VT120A Fast-Timing Preamplifier (200 gain, noninverting)
VT120B Fast-Timing Preamplifier (200 gain, inverting)
VT120C Fast-Timing Preamplifier (20 gain, noninverting)
C-VT120 Power Cable Assembly for VT120A/B/C (3-m length)
C-25-1/2 RG-58A/U 50-W Cable with two BNC male plugs, 6-in. length
C-25-12   RG-58A/U 50-W Cable with two BNC male plugs, 12-ft length