Introduction 9
Although the PG-200 output trigger BNCs are normally set for 5 volt levels and are TTL
compatible, on some units one or more outputs may be specially modified for 15 volt
levels. If a modified 15 volt output is connected to a TTL input, damage to the TTL input
instrument will result.
When operating at wide pulse widths, the duty factor should be restricted to
80%.
Higher duty factors will cause unpredictably lower output levels, which in turn may
cause unpredictable gain, non-linearity, loss of resolution and other problems. As a
result, for operation at high duty factors and with long on times, the shutter mode will
usually give more satisfactory results.
Introduction to the PG-200
The PG-200 Programmable Gate Pulse Generator combines the functions of a high
voltage gate pulse generator and a sophisticated timing source/delay generator. It is
similar to the Princeton Instruments FG-100 and PG-10 pulsers in that it is primarily
intended to provide high speed gating of proximity-focused microchannel plate image
intensifiers. The PG-200 matches the relatively high speed performance of the FG-100,
extends pulse timing to the relatively long times of the PG-10, and has other advanced
features such as continuously variable pulse widths above 3 nsec, simultaneous gating of
two detectors (optional), automatic sweeping of gate pulse delays and other automation
and communications capabilities.
The PG-200 has been designed to drive ICCD detectors with 1M
termination and will
not drive ICCD detectors with 50
termination. Driving an ICCD with 50
termination
will most likely result in damage to the pulser. See the ICCD detector manual for
information on modifying your ICCD detector for 1 M
termination.
The PG-200 is designed to operate in either a stand-alone mode with control through a
front panel keyboard or with control by computer through a serial interface. Using the
serial interface, the PG-200 will be controllable directly from either WinSpec or
WinView software.
The PG-200 front panel has the following features:
External/internal trigger mode selection
Optional optical trigger input
External trigger level set digitally or by potentiometer, selectable input impedance,
AC/DC coupling, ± trigger edge select, “triggered” indicator
Inhibit inputs used to disable pulsing
Internal frequency generator trigger output
Programmable delayed trigger outputs
Dedicated function keys for gate pulse delay, gate pulse width, delayed trigger
output, input trigger level monitor, input trigger mode select
Additional keys for features such as gate pulse delay “box-car” like sweep, pulse
sequences, internal trigger frequency set, panel dim, parameter review, initialize, etc.
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