USER’S MANUAL__________________________________________________________________
350 _________________________________________________________________ M211322EN-D
B.3 Main Computer
Need description here
B.4 IFDR Module
The IFDR module mounting brackets are the same dimensions as previous
RVP8 generation IFDs. The compact sealed module has the following
dimensions: 26.8 cm x 17.6 cm x 4.8 cm (10.5 in x 6.9 in x 1.9 in). The
module can be mounted on edge with the 26.8 cm x 4.8 cm (10.5 in x
1.9 in) surface flush to the back of the receiver cabinet with 17.6 cm
(6.9 in) protrusion into the cabinet. The module is typically placed where
a traditional LOG receiver, or a previous generation RVP IFD, would be
installed.
The IFDR is cooled by direct conduction through its metal enclosure. One
side of the IFDR serves as a heat sink. The hotter chips mounted on the
printed circuit board are bonded to the heat sink. The IFDR should be
positioned so that a minimum of 20 cubic feet per minute of air can freely
convect around it. The ambient air temperature should be within a range of
-40°C to +50°C (-40°F to +122°F). Redundant fans provide the needed
airflow.
The power module is separate unit. The IFDR is delivered with the power
supply module attached to the IFDR mechanical housing. The power
supply module could be removed and mounted nearby in the radar cabinet.
The power supply, fans, and bracket add 8.4 cm (3.3 in) of overall width to
the receiver module. Power modules are available for 100 to 240 VAC at
47 to 63 Hz or 18 to 36 VDC. The AC power supply is a low noise, low
ripple, auto-switching unit. The DC input voltage may be unregulated. If
DC voltage is selected as an option, different fan assemblies are available.
These fan options allow DC voltages from 12 to 18 VDC, 18 to 28 VDC,
and 28 to 36 VDC.
The IFDR has an internal regulator to supply the various digital circuits the
voltages needed. The internal regulated power modules are sized to
provide several Watts more than is required by the RVP901 itself. A ferrite
choke, around the supply wires, near the terminal strip is also
recommended.
NOTE
The circuit boards contain many static sensitive components. Do not
handle the boards or open the IFDR module unless a properly grounded
wrist strap is worn.
To Next Page
Loading...