Dataradio Paragon, Техническое руководство

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120 20170-204a Paragon
PD
Technical Manual 7
2.3.1 Radio Assembly Power
Referring to Figure 3, the Radio assembly unit
receives two separate 13.8 VDC power inputs
from a “T800 Slimline” dual power supply typi-
cally rack-mounted right below the main assem-
bly radio chassis.
The T800 is made up of two separate power
supply units joined in a single chassis:
•
A T807 using convection cooling is rated up
to 15A at 13.8VDC. It supplies all the radio
modules other than the Power Amplifier.
•
A T808 using convection and fan cooling is
rated up to 25A at 13.8VDC. It supplies
only the Power Amplifier module.
Normally used at room ambient temperatures,
they can operate within specifications over a
range of –10 to +60 °C.
Note: Internal over-temperature protection
shuts down the main transformer above
105 degrees Celsius.
Both power supply modules are internally con-
nected to ground via their individual, rear-
connected, seven-foot standard 120 VAC power
cords. Nevertheless, each requires a separate
secure electrical ground connection. Individual
grounding tabs are provided next to the power
connectors.
Similarly, the Radio Assembly chassis requires
a secure ground connection. A threaded
grounding binding post fitted with a knurled
binding-nut is provided on the chassis next to
DC input 2.
Separate grounding leads with appropriate con-
nectors are supplied (either in the courtesy
small-parts kit or with one end fastened to the
equipment.
A- For each of the power supply modules:
1. Fit one end of the grounding lead’s
push-on connector onto the
grounding tab.
B- For the Radio Assembly chassis:
1. Install the grounding lead’s lug over
the binding post and firmly hand-
tighten the binding-nut.
For both A and B
2. Fit the slotted connector (on the other
end of each of the grounding connector)
under a conveniently located screw on
the rack frame or other support surface.
Scrape away paint if needed to ensure
clean contact.
3. Apply anti-corrosion compound where
paint scraping was done.
4. Ensure by testing continuity that a se-
cure electrical and mechanical connec-
tion is achieved.
If a –DC rail (0V) is installed as part of the sys-
tem, the grounding leads may alternatively be
fitted to the rail terminal.
Caution:
Improper grounding between power
supply case and rack frame may result
in harmful voltage potentials and/or
miscellaneous power supply switching
noise problems in both receivers and
transmitter.
Press both red power buttons located on the
front of the module to have complete power
distribution to the Radio assembly.
The power supply front panel LEDs indications
are:
Table 1 - Power Supply LEDs Indications
LED Color Indication
On Green Power enabled *
Stby Red Power disabled *
OL Steady Red Current Overload
On & OL
Flashing green and
red respectively
Over voltage
*
To remove voltage from the power supply PCB, discon-
nect the main power cords.
For LEDs descriptions, see section 3.2.1.2
The Radio assembly is fused at the rear of the
chassis:
•
Fuse 1 is a 32-volt MDL (slow-blow) 10A
•
Fuse 2 is a 32-volt MDL (slow-blow) 30A