1261B User Manual
Specification A-6
Racal Instruments
Ó
1995
Table A-5 Environmental
Characteristic
Description
Classification
MIL-T-28800E Type III, Class 5, Style E or F
Temperature
Operating
Non-operating
Meets the limits stated in MIL-T-28800E for Type
III, Class 5
0
o
C to 55
o
C
-40
o
C to 71
o
C
Relative Humidity
Operating
Non-operating
Up to 95% at up to 30
o
C and up to 45% at up to
55
o
C
Up to 95% at up to 55
o
C
Altitude
Operating
Non-operating
15,000 ft. (4570m)
40,000 ft. (12,190 m)
Random Vibration
Operating
Non-operating
Three axis, 30 minutes total, 10 minutes per axis
0.27 g
RMS
total from 5 Hz to 500 Hz
2.28 g
RMS
total from 5 Hz to 500 Hz
Functional Shock
Operating
Half sine, 30 g, 11 ms duration. Meets functional
shock requirements of MIL-T-28800E, Type III,
Class 5 (Operating and Non-Operating)
User Bench Handling (Operating)
Each edge lifted four inches and allowed to free fall
onto a solid wooden bench surface.
Electromagnetic Compatibility (EMC)
Emissions
Enclosure
AC Mains
Emissions shall be within the limits specified by the
following requirements:
EN 55011 and EN 55022 Class B
FCC Part 15 Class B limits for radiated emissions
EN 60555-2 AC power harmonic emissions
EN 55011 Class B, FCC Part 15 Class B limits for
conducted emissions
Immunity, Enclosure, Radio Frequency
Electromagnetic Field
No mainframe failures when the mainframe is
subjected to a 3 V/m electromagnetic field over the
frequency range of 27 MHZ to 500 MHZ.
Immunity, Enclosure, Electrostatic
Discharge (ESD)
Up to 8 kV with no change to control settings or
impairment of normal operation.
Immunity, Fast Transients, Common Mode
Port Peak Voltage Tr/Th Rep Frequency
Signal&Control 0.5 kV 5/50 ns 5 kHz
DC Power 0.5 kV 5/50 ns 5 kHz
AC Power 1.0 kV 5/50 ns 5 kHz
MTBF
41,196 Hours
MTTR – Power Supply, Fans, Filters, and
EMS or SMS module
< 5 minutes
Table A-6, Backplane
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