Nautel ND500II User manual

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 1)
29 January 2002
INTRODUCTION
1. When two ND500II 125 watt radiobeacon
transmitters and an NDDS/T Dual Direct Digital
Synthesizer (DDS) are installed in an NARB07
cabinet, some mechanical information in the
transmitter's instruction manual must be changed and
the cabinet's electrical information is required. This
document identifies the mechanical differences. It
also provides an electrical parts list and point-to-point
wiring information for the cabinet. It is recommended
that, where replacement pages are not provided,
affected areas of the transmitter instruction manual be
highlighted using a suitable marker, or changed using
pen and ink, to ensure users of the manual are aware
of the differences.
MECHANICAL DIFFERENCES
2. The drawer slide depicted in figure MD-17
of the transmitter instruction manual has been
replaced with a different type of slide. It is not
possible to swivel the transmitter when using this
slide. All references to rotating the transmitter when
it is extended on its drawer slide must be ignored. If it
is not possible to access a specific area of a transmitter
when it is extended on its drawer slide, the transmitter
must be lifted off its slides and placed on a work
surface.
CABINET DESCRIPTION (see figure 1):
3. The cabinet is 30 inches high, 21 inches
wide and 24.5 inches deep. It houses two ND500II
radiobeacon transmitters and an NDDS/T. The upper
transmitter is designated as the Atransmitter, while
the lower transmitter is designated as the B
transmitter. The cabinet also contains a type N RF
coaxial connector (J1), which is the RF output
connection point for the RF feed cable; two AC power
duplex receptacles; a two-pole, double-throw switch
(S1) that selects which transmitter will be the main
transmitter; three barrier strips (TB1, TB2 and TB3),
which are used as the external wiring interface; and
the interconnecting wiring. Refer to figure 3 for an
electrical schematic of the cabinet.
THEORY OF OPERATION
4. The theory of operation presented in the
ND500II instruction manual describes the operation
of both transmitters. The following provides a brief
description for when they are connected in a
main/standby dual installation. See figure 3 of this
information sheet for system interconnection.
NOTE
The upper transmitter (ND500II-113-x20) is identified
as the Atransmitter and the lower transmitter
(ND500II-013-x20) is the Btransmitter. The A
transmitter's harmonic filter contains a relay that
routes the RF output of the active transmitter to the
antenna system.
4.1 MAIN TX OPERATION: When the
main transmitter, as selected by the (S1) SELECT MAIN
TX switch, is turned on and producing a satisfactory
RF output; the following will occur:
(a) The source voltage for the NDDS/T's 24VDC
inputs will be provided by the selected main
transmitter. The NDDS/T will provide a RF
signal at the transmitter's operating frequency to
J3 (Ext RF Drive) of the selected main
transmitter.
(b) 15VDC, from TB2-1 of the main transmitter,
will be applied to TB1-6 of the standby
transmitter as its standby off control signal.
(c) If the Atransmitter is the main transmitter, the
main/standby relay in its harmonic filter will be
energized. If the Btransmitter is the main
transmitter, the main/standby relay in the A
transmitter's harmonic filter will be de-
energized. The selected main transmitter's RF
output will be routed to the cabinet's RF OUT
coaxial connector (J1).
(d) The source for the antenna tuning unit controls,
at TB3-6 thru TB3-10 (ATU CONT) of the
cabinet's customer interface assembly, will be
the selected main transmitter.
(e) The selected main transmitter will be providing
the 'audio out' (RMT AUD) sample.

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 2)
29 January 2002
(f) If transmitter 'A' is selected as the 'main'
transmitter, an open collector SHTDN ALM (B)
signal will be applied to TB3-5 from TB2-7
('shutdown') of transmitter 'B', indicating it is
not turned on.
(g) If transmitter 'B' is selected as the 'main'
transmitter, an open collector SHTDN ALM (A)
signal will be applied to TB3-4 from TB2-7
('shutdown') of transmitter 'A', indicating it is
not turned on.
4.2 STANDBY TX OPERATION: If the
main transmitter shuts down because an abnormal
condition was sensed for more than 20 seconds, or for
any other reason, the following will occur:
(a) 15VDC that was being applied to TB1-6 of the
standby transmitter, from TB2-1 of main
transmitter, will be switched off. The standby
transmitter's DC power supplies will turn on and
provide B+VDC, 24VDC and 15VDC outputs.
It will also produce an RF output.
(b) The source for the NDDS/T's 24VDC inputs
will be the standby transmitter. The NDDS/T
will provide a RF signal at the transmitter's
operating frequency to J3 (Ext RF Drive) of the
standby transmitter.
(c) If transmitter Awas the main transmitter, the
main/standby relay in its harmonic filter will de-
energize. If transmitter Bwas the main
transmitter, the main/standby relay in
transmitter A's harmonic filter will energize.
The standby transmitter's RF output will be
routed to the cabinet's RF OUT coaxial connector
(J1).
(d) The source for the antenna tuning unit controls,
at TB3-6 thru TB3-10 (ATU CONT) of the
cabinet's customer interface assembly, will be
the standby transmitter.
(e) The standby transmitter will be providing the
'audio out' (RMT AUD) sample.
(f) If transmitter 'A' is selected as the 'main'
transmitter, an open collector SHTDN ALM (A)
signal will be applied to TB3-4 from TB2-7
('shutdown') of transmitter 'A', indicating it is
not turned on.
(g) If transmitter 'B' is selected as the 'main'
transmitter, an open collector SHTDN ALM (B)
signal will be applied to TB3-5 from TB2-7
('shutdown') of transmitter 'B', indicating it is
not turned on.
INSTALLATION INFORMATION
5. Complete or verify the following
requirements are completed during installation of the
transmitter/cabinet.
(a) Ensure the cabinet will not topple, when the
transmitters are installed and one or both are
extended on their drawer slides, by securely
bolting the cabinet to its mounting surface or by
rigidly securing it using some other suitable
means. There are four bolt holes in the base of
the cabinet to accommodate securing hardware.
(b) Connect appropriate AC power source wiring
(115VAC, 60Hz or 230VAC, 50/60Hz) to
duplex receptacle J2, ensuring wiring passes
through and is secured by a cable clamp in the
cabinet's cable entry hole.
(c) Connect external control/monitor wiring to TB2
and TB3 of the customer interface assembly as
depicted in figure 2 of these instructions.
Ensure wires pass through and are secured by a
cable clamp in the cabinet's cable entry hole.
Refer to figure 4 for the interface assembly
detail.
NOTE
If an external power trim control circuit is to be used,
remove or verify both power trim bypass links
(between TB2-4/TB2-5 and between TB2-7/TB2-8)
are removed.
If an external power trim control circuit is not used,
install or verify both power trim bypass links (between
TB2-4/TB2-5 and between TB2-7/TB2-8) are
installed.
(d) Connect a continuous, insulated, 4AWG copper
wire or one-inch copper braid between the
station lightning/safety ground and the cabinet's
safety ground connection, noting it is located on
the top of the cabinet adjacent to the RF output
connector (J1). Ensure this wire does not

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 3)
29 January 2002
contact any other conductive surface of the
cabinet.
(e) Verify the antenna system's RF feed cable is
terminated by a type 'N' coaxial connector at the
transmitter end and then connect it to the
cabinet's RF output connector (J1).
(f) Connect external DC power source wiring to
TB1-1 (+) and TB1-2 (-), ensuring wiring
passes through and is secured by a cable clamp
in cabinet's cable entry hole.
(g) Install the NDDS/T (DDS) unit in the lower
portion of cabinet, as depicted in figure 1.
(h) Mate connector P5 of the cabinet's wiring
harness to J1 of the NDDS/T and mate
connector P7 of the cabinet's wiring harness to
J2 of the NDDS/T noting J1 and J2 are located
at the rear of the unit.
(i) Install ND500II-113-x20 transmitter (as
identified on its nameplate) in the upper drawer
slide of the cabinet (transmitter A). Ensure it is
properly seated on the slides.
(j) Install ND500II-013-x20 transmitter (as
identified on its nameplate) in the lower drawer
slide of the cabinet (transmitter B). Ensure it is
properly seated on the slides.

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 4)
29 January 2002
Figure 1 Main/Standby ND500II Radiobeacon Transmitter Installed in NARB07 Cabinet

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 5)
29 January 2002
Figure 2 External Control/Monitor Interconnecting Wiring

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 6)
29 January 2002
Figure 3 Electrical Schematic - Main/Standby 125 Radiobeacon in NARB07 Cabinet

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 7)
29 January 2002
(k) Connect wires #'s 1, 3, 5, 7, 9, 11, 12, 16, 19,
21, 23, 25, 27, 29, 31, 37, 38, 43 and 44 of the
cabinet's wiring harness, to the A(1) transmitter
as tabulated in table 2.
(l) Connect wires #'s 2, 4, 6, 8, 10, 13, 14, 15, 17,
18, 20, 22, 24, 26, 28, 30, 32, 45 and 46 of the
cabinet's wiring harness, to the B(2) transmitter
as tabulated in table 2.
NOTE
Wire #35 and #36 are not the size recommended in
the installation instructions of the ND500II manual.
They are installed to ensure the transmitter chassis is
grounded in conformance with most electrical codes.
It is intended that all transient currents flowing in the
RF feed cable will be shunted to the station safety
ground by the conductor connected to the ground stud
which is adjacent to J1 on the top of the cabinet.
(m) Connect wire #35 to the A transmitter's
safety/ground stud, noting it is located
immediately below 1TB1.
(n) Connect wire #36 to the B transmitter's
safety/ground stud, noting it is located
immediately below 2TB1.
(o) Verify connector P4 (terminates one end of wire
#34) is installed on and fully mated with the
interior portion of the cabinets RF output
connector (J1).
(p) Install connector P3 (terminates one end of wire
#34) on the Atransmitter's RF output connector
(1A7J2). Ensure it is fully mated.
(q) Install connector P2 (terminates one end of wire
#33) on the Atransmitter's RF input connector
(1A7J3). Ensure it is fully mated.
(r) Install connector P1 (terminates one end of wire
#33) on the Btransmitter's RF output connector
(2A7J2). Ensure it is fully mated.
(s) Verify connector P5 (terminates one end of wire
#47) is installed on the NDDS/T's RF Osc (A)
output connecter (3J1). Ensure it is fully mated.
(t) Install connector P6 (terminates one end of wire
#47) on the Atransmitter's Ext RF Drive input
connector (1J3). Ensure it is fully mated.
(u) Verify connector P7 (terminates one end of wire
#48) is installed on the NDDS/T's RF Osc (B)
output connector (3J2). Ensure it is fully mated.
(v) Install connector P8 (terminates one end of wire
#48) on the Btransmitter's Ext RF Drive input
connector (2J3). Ensure it is fully mated.
(w) Connect an AC power cable (W1) between the
Atransmitter's AC power cable receptacle (1J2)
and one side of the cabinet's AC power duplex
receptacle (J2).
(x) Connect an AC power cable (W2) between the
Btransmitter's AC power cable receptacle (2J2)
and the other side of the cabinet's AC power
duplex receptacle (J2).
INITIAL START-UP PROCEDURES
6. It is recommended both transmitters and the
NDDS/T unit be tested as individual stand-alone
assemblies prior to full interconnection and operation
as a main/standby transmitter system during initial
start-up. The procedures described in the instruction
manuals for ND500II 125 watt radiobeacon
transmitter and the NDDS/T unit should be used.
ADJUSTMENT AND TESTING
7Test each transmitter individually, check
the operation of the NDDS/T unit and then verify the
main/standby function is operational (automatic
changeover to standby transmitter occurs when the
main transmitter is not producing a satisfactory RF
output).
7.1 NO ON-AIR TRANSMITTER: If one
transmitter is to be operated (tested/serviced) into a
precision dummy load and the other is not required to
be on-air, proceed as follows:
(a) Turn off both transmitters. Set their POWER
switches to OFF.
(b) Connect a 250 Watt, precision, 50-ohm,
resistive, dummy load to the cabinet's RF output

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 8)
29 January 2002
connector, using a suitable coaxial cable.
(c) Ensure the transmitters cannot be controlled
remotely. Set the CONTROL switch of both
transmitters to LOCAL.
(d) Turn on the transmitter to be tested/serviced.
Set its POWER switch to ON.
(e) Test/service the transmitter using the procedures
in the ND500II 125 watt radiobeacon
transmitter instruction manual.
(f) On successful completion of maintenance
procedures, turn off the transmitter being
tested/serviced. Set its POWER switch to OFF.
(g) If required, repeat steps (d) thru (f) for the other
transmitter.
(h) When operation into an antenna system is to be
restored:
- disconnect the dummy load's coaxial feed
cable from the cabinet's RF output
connector.
- connect the antenna system's RF feed cable
to the cabinet's RF output connector.
- Set the
CONTROL switch of both
transmitters to LOCAL or REMOTE as desired.
- Select the main transmitter. Set the
SELECT MAIN TX switch to the desired
setting.
- Turn on both transmitters. Set their
POWER switches to ON.
7.2 WITH AN ON-AIR TRANSMITTER:
If one transmitter is to be operated into a precision
dummy load while the other is on-air, the standby
on/off control must be disabled and the RF outputs
must be reconfigured as follows:
7.2.1 Tx B Under Test/Tx A On-Air: If the B
transmitter is to be operated with its RF output into a
dummy load and the Atransmitter is to be maintained
in an on-air status, proceed as follows:
(a) Turn off the Btransmitter. Set its POWER switch
to OFF.
CAUTION
Wire #13 and wire #38 have 15VDC on them when
their associated transmitter is turned on. Ensure
terminal lug, of either disconnected wire, does not
contact a conductive surface.
(b) Disable the standby on/off control for both
transmitters. Disconnect wire #38 from TB1-6
of the Atransmitter and wire #13 from TB1-6 of
the Btransmitter.
(c) Disconnect the Btransmitter's RF output coaxial
cable (wire #33 terminated by P1) from its RF
output connector.
(d) Connect a 250 Watt, precision, 50-ohm,
resistive, dummy load to the Btransmitter's RF
output connector, using a suitable coaxial cable.
(e) Set or verify the Btransmitter is set for local
control. Set its CONTROL switch to LOCAL.
(f) Turn on the Btransmitter. Set its POWER switch
to ON.
(g) Test/service the Btransmitter using the
procedures in the ND500II 125 watt
radiobeacon transmitter instruction manual.
(h) On successful completion of maintenance
procedures, turn off the Btransmitter. Set its
POWER switch to OFF.
(i) If main/standby operation is to be restored
proceed to step (j). If the Atransmitter is to be
tested, while transmitter Bis maintained on-air,
proceed to paragraph 7.2.2.
(j) Disconnect dummy load's feed cable from
transmitter B's RF output connector.

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 9)
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(k) Connect transmitter B's original RF output
coaxial cable (wire #33 terminated by P1) to its
RF output connector [it was disconnected in
step (c)].
(l) Restore the standby on/off control. Connect
wires removed in step (b) to their original
destinations (#38 to TB1-6 of transmitter Aand
#13 to TB1-6 of transmitter B).
(m) Select the main transmitter. Set the SELECT MAIN
TX switch to the desired setting.
(n) Restore the installation to a main/standby
configuration by setting the Btransmitter's
POWER switch to ON and its CONTROL switch to
LOCAL or REMOTE as desired.
7.2.2 Tx A Under Test/Tx B On-Air: If the A
transmitter is to be operated with its RF output into a
dummy load and the Btransmitter is to be maintained
in an on-air status, proceed as follows:
(a) Turn off both transmitters. Set their POWER
switches to OFF.
CAUTION
Wire #13 and wire #38 have 15VDC on them when
their associated transmitter is turned on. Ensure
terminal lug, of both disconnected wires, does not
contact a conductive surface.
(b) Disable the standby on/off control for both
transmitters. Disconnect wire #38 from TB1-6
of the Atransmitter and wire #13 from TB1-6 of
the Btransmitter.
(c) Disconnect the Btransmitter's RF output coaxial
cable (wire #33 terminated by P1) from its RF
output connector.
(d) Disconnect the Atransmitter's RF output coaxial
cable (wire #34 terminated by P3) from its RF
output connector.
(e) Disconnect the RF output coaxial cable (other
end of wire #34 terminated by P4) from the
interior side of the cabinet's RF output
connector.
(f) Interconnect the Btransmitter's RF output
connector and the interior side of the cabinet's
RF output connector, using a suitable coaxial
cable (from coaxial cables provided).
(g) Connect a 250W, precision, 50-ohm, resistive,
dummy load to transmitter A's RF output
connector. Use a suitable coaxial cable.
(h) Turn on the Btransmitter. Set its POWER switch
to ON.
(i) Set the Atransmitter for local control. Set its
CONTROL switch to LOCAL.
(j) Turn on the Atransmitter. Set its POWER switch
to ON.
(k) Test/service the Atransmitter using the
procedures in the ND500II 125 watt
radiobeacon transmitter instruction manual.
(l) On successful completion of maintenance
procedures, turn off both transmitters. Set their
POWER switch to OFF.
(m) Disconnect and remove the coaxial cable
interconnecting transmitter B's RF output
connector to the interior side of the cabinet's RF
output connector [installed in step (f)]
(n) Disconnect dummy load's feed cable from
transmitter A's RF output connector.
(o) Connect transmitter A's original RF output
coaxial cable (wire #34 terminated by P3) to its
RF output connector [it was disconnected in
step (d)].
(p) Connect the RF output coaxial cable (other end
of wire #34 terminated by P4) to the interior
side of the cabinet's RF output connector [it was
disconnected in step (e)].
(q) Restore the standby on/off control. Connect
wires removed in step (b) to their original
destinations (#38 to TB1-6 of transmitter Aand
#13 to TB1-6 of transmitter B).
(r) If main/standby operation is to be restored,

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 10)
29 January 2002
proceed to step (s). If the Btransmitter is to be
tested, while transmitter Ais maintained on-air,
go to paragraph 7.2.1.
(s) Connect transmitter B's original RF output
coaxial cable (wire #33 terminated by P2) to its
RF output connector [it was disconnected in
step (c)].
(t) Select the main transmitter. Set the SELECT MAIN
TX switch to the desired setting.
(u) Restore the installation to a main/standby
configuration by setting both transmitters'
POWER switch to ON. Set the CONTROL switch of
both transmitters to LOCAL or REMOTE as desired.
7.3 AUTOMATIC CHANGEOVER CHECK:
Check the changeover circuitry will automatically
select the standby transmitter, as the on-air
transmitter, when the main transmitter's RF output is
abnormal, as follows:
(a) Verify both transmitters are turned on and their
switches are set as specified for Operating
Setting in table 4-1 of the ND500II instruction
manual.
(b) Select the A (upper) transmitter as the main
transmitter. Set the cabinet's SELECT MAIN TX
switch to A.
(c) Verify the A (upper) transmitter is producing a
satisfactory RF output and the B(lower)
transmitter's RF output is inhibited.
(d) Disable the main transmitter's audio keying (set
its KEYING switch to OFF).
(e) After approximately 20 seconds, the main
transmitter's RF output should turn off and it
should shut down. The standby transmitter
should be enabled as the on-air transmitter and
producing an RF output.
NOTE
If TB1-7 of the standby transmitter is connected to
ground, its 'standby 1' code variation will be
transmitted when it turns on.
(f) Set the original main transmitter's KEYING switch
to ON.
(g) Restore the selected main transmitter as the on-
air transmitter by momentarily setting its POWER
switch to OFF and then return it to ON.
(h) Verify the main transmitter, as selected by the
SELECT MAIN TX switch, is producing the desired
RF output and the standby transmitter's RF
output is inhibited.
(i) If desired, select the B (lower) transmitter as the
main transmitter. Set the cabinet's SELECT MAIN
TX switch to B.
(j) Verify the B (lower) transmitter is producing a
satisfactory RF output and the A (upper)
transmitter's RF output is inhibited.
(k) Repeat steps (d) thru (h).

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
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Table 2 Wiring List - NARB07 Cabinet (Main/Standby)
* SOURCE DESTINATION CODE SIZE REMARKS
TB1-1 1TB2-9 1 Red 14
TB1-1 2TB2-9 2 Red 14
TB1-2 1TB2-10 3 Black 14
TB1-2 2TB2-10 4 Black 14
TB2-1 1TB2-6 5 White 20
TB2-1 2TB2-6 6 White 20
TB2-2 1TB1-5 7 White 20
TB2-2 2TB1-5 8 White 20
TB2-3 1TB1-4 9 White 20
TB2-3 2TB1-4 10 White 20
TB2-4 1TB1-3 11 White 20
TB2-5 1TB2-1 12 Red 20
TB2-6 2TB1-6 13 White 20
TB2-7 2TB2-1 14 Red 20
TB2-8 2TB1-3 15 White 20
TB2-9 1TB1-8 16 White 20
TB2-9 2TB1-8 17 White 20
TB2-10 2TB1-7 18 White 20
TB3-1 1TB1-1 19 Core 22 1-Conductor
TB3-2 1TB1-2 - Shield - Shielded
TB3-3 2TB1-1 20 Core 22 1-Conductor
TB3-2 2TB1-2 - Shield - Shielded
TB3-4 1TB2-7 21 White 20
TB3-5 2TB2-7 22 White 20
TB3-6 1TB2-3 23 White 20
TB3-6 2TB2-3 24 White 20
TB3-7 1TB2-4 25 White 20
TB3-7 2TB2-4 26 White 20
TB3-8 1TB2-5 27 White 20
TB3-8 2TB2-5 28 White 20
TB3-9 1TB2-8 29 Red 20
TB3-9 2TB2-8 30 Red 20
TB3-10 1TB2-2 31 Black 20
TB3-10 2TB2-2 32 Black 20
P1-Centre P2-Centre 33 Core RG58A/U Coaxial Cable
P1-Shield P2-Shield - Shield
P3-Centre P4-Centre 34 Core RG58A/U Coaxial Cable
P3-Shield P4-Shield - Shield
Rk Sfty Gnd Sfty Gnd Tx 1 35 Black 14
Rk Sfty Gnd Sfty Gnd Tx 2 36 Black 14
1TB1-7 TB2-11 37 White 22
1TB1-6 TB2-12 38 White 22
S1-1 TB2-6 39 White 22
S1-3 TB2-5 40 Red 22
S1-4 TB2-7 41 Red 22
S1-6 TB2-12 42 White 22
3TB1-1 1TB1-9 43 Red 20
3TB1-2 1TB2-2 44 Black 20

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
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Table 2 Wiring List - NARB07 Cabinet (Main/Standby) (Continued)
* SOURCE DESTINATION CODE SIZE REMARKS
3TB1-3 2TB1-9 45 Red 20
3TB1-4 3TB2-2 46 Black 20
P5-Centre P6-Centre 47 Core RG58A/U Coaxial Cable
P5-Body P6-Body 47 Shield
P7-Centre P8-Centre 48 Core RG58A/U Coaxial Cable
P7-Body P8-Body 48 Shield
Rk Sfty Gnd Gnd at J2 - Black 14 Jumper

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
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Table 4 - Reference Designation Index - NARB07 Cabinet (Main/Standby 125W Radiobeacon)
USE REF NAME OF PART NAUTEL'S JAN/MIL/OEM OEM
CODE DES AND DESCRIPTION PART NO. PART NO. CODE
♦Cabinet Assembly, Dual ND500II, 115VAC NARB07/01 158-7700-01
37338
♥- Cabinet Assembly, Dual ND500II, 230VAC NARB07/02 158-7700-02
37338
♦1 Transmitter, 125 Watt, DSB, 115V - ND500II-1x3-120 37338
♥1 Transmitter, 125 Watt, DSB, 230V - ND500II-1x3-320 37338
♦2 Transmitter, 125W, DSB, 115V - ND500II-0x3-120 37338
♥2 Transmitter, 125W, DSB, 230V - ND500II-0x3-320 37338
3 Frequency Synthesizer, Beacon NAX198 See NAX198 manual 37338
J1 Connector, Coaxial, N, Adaptor, 50Ω, J/J JA05 91100
02660
♦J2 Connector, Socket, Duplex, 115V, 15A, Ivory JDP30 CAN5262I
♥J2 Connector, Socket, Duplex, 250V, 15A JDP32 5662
74545
P1 Connector, Coaxial, N, Plug, 50Ω, Crimp JDP22 82-5375
02660
P2 Connector, Coaxial, N, Plug, 50Ω, Crimp JDP22 82-5375
02660
P3 Connector, Coaxial, N, Plug, 50Ω, Crimp JDP22 82-5375 02660
P4 Connector, Coaxial, N, Plug, 50Ω, Crimp JDP22 82-5375
02660
P5 Connector, Coaxial, BNC, Plug, 50Ω, Crimp JA37 31-320
02660
P6 Connector, Coaxial, BNC, Plug, 50Ω, Crimp JA37 31-320
02660
P7 Connector, Coaxial, BNC, Plug, 50Ω, Crimp JA37 31-320
02660
P8 Connector, Coaxial, BNC, Plug, 50Ω, Crimp JA37 31-320
02660
S1 Switch, Toggle, 2PDT SCP03 8373K107
08372
TB1 Terminal Block, 3-Pos, Single, FT, 30A JC23 21303
13150
TB2 Terminal Block, 12-Pos, Single, FT, 15 JB14 A14312
13150
TB3 Terminal Block, 12-Pos, Single, FT, 15 JB14 A14312
13150
♦W1 Cord, Line Assy, Mates with JN24, 125V JN25 17250
70903
♥W1 Line Cord Assy 158-7109 158-7109
37338
♥W1P1 Connector, Plug, 250V, 15A, Straight Blade JDP33 5057-001
36074
♦W2 Cord, Line Assy, Mates with JN24, 125V JN25 17250
70903
♥W2 Line Cord Assembly 158-7109 158-7109
37338
♥W2P1 Connector, Plug, 250V, 15A, Straight Blade JDP33 5057-001
36074
USE CODE EXPLANATION:
♦- Denotes item is used when AC power source is 115Vac, 60Hz.

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 14)
29 January 2002
♥- Denotes item is used when AC power source is 230Vac, 50Hz.

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 15)
29 January 2002
Connector Mating Information
CONNECTOR MATE
P1 P1(2A7J2)
P2 P2(1A7J3)
P3 P3(1A7J2)
P4 P4(J1)
P5 P5(3J1)
P6 P6(1J3)
P7 P7(3J2)
P8 P8(2J3)

MAIN/STANDBY 125 WATT RADIOBEACON WITH NDDS/T (INSTALLED
IN NARB07 CABINET)
IS02001 (Page 16)
29 January 2002
Figure 4 Assembly Detail - Customer Interface Assembly (Part No. 158-7103)