1261B User Manual
Racal Instruments
Ó
1995
Specification A-13
Characteristics
Description
VXI Power Supply
Airflow
Health Status
Readout
Available at :
Front Panel Display (1 x 10 Characters),
VXI Message Based Interface,
RS-232 interface
Tolerance limit: 2000 RPM < Fan speed < 5000 RPM
± 200 RPM accuracy
Rear Panel Trigger Input
TTL level Input (5VDC max), active low
Routes to any one of eight backplane TTLTRIG lines
(default is unconnected).
Routing delay 50 nS, typical
Programmable delay range: 0 nS to > 1 Second,
31.25 nS resolution, synchronization error 31.25 nS
Rear Panel Trigger Output
TTL level Output, active low, 74F38 driver with 1K
Ohm pull up to +5V
Routes from any one of eight backplane TTLTRIG
lines or Real Panel Trigger Input (default is
unconnected).
Routing delay 50 nS, typical
Programmable delay range: 0 nS to > 1 Second,
31.25 nS resolution, synchronization error 31.25 nS
Elapsed Time Functions
Fan Service
Power-On Time
Cumulative Power-On Time
1 Second resolution
1 Second resolution
1 Second resolution
VXI IACK<N> Event Count
1 Count resolution,
0 to 255 range
VXI Bus Error Event Count
1 Count resolution,
0 to 255 range
VXI SYSFAIL*, ACFAIL*, and AS* Logic
State Monitor
State Indication:
1 if the line is high, or a 0 if the line is low.
(Note that since each of these lines is asserted when
low, the normal reply should be “1").
Front Panel User Message
80 Characters, scrolled
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