186 PI-MAX/PI-MAX2 System Manual Version 5.F
Hard disk with a minimum of 80 Mbytes available. A complete installation of the
program files takes about 17 Mbytes and the remainder is required for data
storage, depending on the number and size of spectra collected. Disk level
compression programs are not recommended.
Super VGA monitor and graphics card supporting at least 256 colors with at least
1 Mbyte of memory. Memory requirement is dependent on desired display
resolution.
IEEE-488 GPIB port (required by DG535 Timing Generator, if present). May
also be required by Spectrograph.
Two-button Microsoft compatible serial mouse or Logitech three-button
serial/bus mouse.
Operating Environment
Storage Temperature: < 55°C
Lab Temperature: 30°C > T > -25°C
Supplemental Cooling Water Flow Rate: 1-3 liters per minute
Note: Circulating water will enhance cooling performance but is not required.
Lab Humidity: < 50%; non-condensing.
Controller
Controller Type: ST-133
Inputs:
EXT SYNC: TTL input (BNC) to allow data acquisition to be synchronized with
external events. Sense can be positive or negative going as set in software.
Synchronization and Trigger Modes are discussed in the Shutter Mode and Gated
operation chapters.
Outputs:
VIDEO or AUX
Video: 1 V pk-pk from 75 , BNC connector. Either RS-170 (EIA) or CCIR
standard video as specified when system was ordered. Requires connection via
75 cable that must be terminated into 75 .
Aux: Reserved for future use.
: TTL output (BNC) for monitoring detector status. Logic output is software-
selectable as either NOT SCAN or SHUTTER. When the logic output is NOT
SCAN, it is at a TTL low when CCD is being read; otherwise high. When the
logic output is SHUTTER, the output precisely brackets shutter-open time
(exclusive of shutter compensation) and can be used to control an external shutter
or to inhibit a pulser or timing generator. Default selection is SHUTTER.
: TTL output (BNC); marks start of first exposure. When run is initiated,
remains high until completion of cleaning cycles preceding first exposure, then
goes low and remains low for duration of run.
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