User's Manual

120 20170-302 Paragon
PD
Technical Manual
13
3.1.2 Radio Assembly, rear panel
3.1.2.1 Backplane PCB
Referring to Figure 3, two main backplanes are
used. Their main components are:
• RJ11 connector – Mirrors the one on the
front of the Speaker panel (series con-
nected to both backplanes). Used for
programming the Radio Assembly when-
ever the speaker panel has been removed.
• DB-25M plug at PL1 (one side of the
“Y” cable on each PCB) – used to supply
the receive signal to the BDLC
PD
’s single
“EXT.RADIO/TEST” DB-25F plug.
• Two channel-select DIP switches (SW1
and SW2)
This feature is exclusive to the Series II model.
• Cooling fan driver – CN2 located on
backplane connects to the horizontally-
mounted fan on top of the Radio assem-
bly and activated by BDLC’s PTT signal.
• Coaxial relay driver – not used.
3.2 BDLC
PD
The rack-mounted BDLC
PD
is housed in a steel
case. It has no user serviceable parts. Unit’s con-
figuration is stored in flash memory (EEPROM).
3.2.1 BDLC
PD
Front panel
Referring to Figure 2, the front panel of the
BDLC
PD
has two cutouts across its length.
A- The left cutout groups the unit’s type label
and ten LED indicators:
• The S3 label designates the BDLC
PD
as a
“three Serial-port” model
(Ports 4 and 5 are reserved for future use)
• The RF group of 3 LEDs
• The RS-232 group of 5 LEDs
• A single CK LED
• The ALARMS group of 4 LEDs
B- The right cutout groups two tactile (mem-
brane) switches (PF1 and RESET).
3.2.1.1 Front Switches
Referring to Figure 11, the BDLC
PD
uses two
membrane-type switches labeled:
• RESET
• PF 1
These switches indicate contact by emitting a
short BEEP tone when pressed.
Figure 11 - BDLC
PD
membrane switches
3.2.1.1.1 Reset
Pressing Reset produces the same result as pow-
ering OFF and ON again. It restarts the micro-
processor, the peripherals and invokes the on-
board diagnostics. BDLC
PD
’s radio modules’ in-
ternal flash-memories are read and their values
are loaded in system SRAM CPU flash-memory.
Normally, pressing Reset results in one short
BEEP tone followed by all LEDs coming ON for
about four seconds. Then, the LEDs flash in a
“ripple” pattern for close to two seconds indi-
cating diagnostics are in progress. At the end of
this period, all LEDs should be OFF except CK
that should flash about six to eight times per sec-
ond.
Expect an additional two seconds delay for CK to
start flashing and the UF indicator to come ON if
the radio assembly is not connected or not pow-
ered (see section 3.2.1.5.4 for Alarm details).
3.2.1.1.2 PF 1
PF 1 is a multi-function switch:
• It clears LED error indications
• It initiates test transmissions
• It sets the function of the RS-232 LEDs
PF1
RESET