Nautel ND500II User manual

Information Sheet
IS03003
Dual ND500II -
Installation and
Operating
Instructions (in User
Supplied Cabinet)
IS03003
Original Issue 15 January 2004
Nautel Limited
10089 Peggy's Cove Road,
Hackett's Cove, NS, Canada B3Z 3J4
T.+1.902.823.2233 F.+1.902.823.3183
[email protected]
U.S. customers please contact:
Nautel Maine, Inc.
201 Target Industrial Circle, Bangor ME 04401
T.1.207.947.8200 F.1.207.947.3693
[email protected]
e-mail: [email protected]
www.nautel.com
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Dual ND500II (User Supplied Cabinet) – IS03003 Page 1
Information Sheet Issue 1.0
IS03003 Dual ND500II (User Supplied Cabinet)
Information Sheet
1. INTRODUCTION
This document identifies the information
specific to a dual (main/standby) ND500II
radiobeacon transmitter system installed in a
user supplied cabinet. It also provides the
electrical parts list and point-to-point wiring
information for the dual transmitter system.
Information provided includes theory of
operation, installation, start-up and
calibration/testing procedures, parts list,
wiring list, electrical schematics and
mechanical drawings (including dimensions).
2. CABINET REQUIREMENTS
The user supplied cabinet must be able to
house two ND500II radiobeacon transmitters
and an interface assembly (plus an optional
remote control unit if desired). The upper
transmitter is designated as transmitter A
(unit 1), while the lower transmitter is
designated as transmitter B (unit 2). The
Nautel supplied equipment includes:
-two ND500II radiobeacon transmitters
- a dual transmitter interface assembly
(unit 3)
- a computer remote control unit (unit 4,
optional)
- interconnecting wiring
Refer to figures 2 and 3 for electrical
schematics of the dual transmitter system.
Refer to figure 4 for recommended
equipment layout.
3. THEORY OF OPERATION
The theory of operation presented in the
ND500II instruction manual describes the
operation of both transmitters A (ND500II-
11x-x2x) and B (ND500II-01x-x2x). The
following provides a brief description for
transmitters that are connected in a
main/standby dual installation. See figure
2A or 2B for interconnecting detail. See
figure 3 for the electrical schematic of the
dual transmitter interface PWB (3A1).
3.1 Normal Operation: When the ‘main’
transmitter, selected by MAIN XMTR A/B
switch 3S2, is turned on and producing a
satisfactory RF output, the following will
occur:
(a) +15V will be applied from the main
transmitter (1A11J4-13 or 2A11J4-13),
through the dual transmitter interface
PWB (3A1J4-11 or 3A1J5-19) to the
standby transmitter (1A11J4-20 or
2A11J4-20), as the 'standby off'
control signal.
(b) If transmitter A is selected as the
'main' transmitter, the main/standby
relay in transmitter A's harmonic filter
will be energized and will connect
transmitter A’s output to the antenna
system.
(c) If transmitter B is selected as the
'main' transmitter, the main/standby
relay in transmitter A's harmonic filter
will be de-energized and transmitter
B’s output will be connected to the
antenna system.
(d) The selected 'main' transmitter will
provide +15V and the manually
controlled slewing commands (ATU
CONT) for the antenna system's
antenna tuning unit via the dual
transmitter interface assembly (unit 3).
(e) The selected 'main' transmitter will be
providing the 'audio out' (RMT AUD)
sample via the dual transmitter
interface assembly (unit 3).
(f) If transmitter A is selected as the
'main' transmitter, an open collector
SHTDN ALM (B)signal will be applied to
3A1J5-23 from A11J4-17 ('shutdown')
of transmitter B.

Page 2 Dual ND500II (User Supplied Cabinet) – IS03003
Issue 1.0 Information Sheet
(g) If transmitter B is selected as the
'main' transmitter, an open collector
SHTDN ALM (A) signal will be applied to
3A1J4-23 from A11J4-17 ('shutdown')
of transmitter A.
3.2 Shutdown/Changeover: If the
selected 'main' transmitter is shutdown
because an abnormal condition was sensed
for more than 20 seconds (maximum pre-
settable time period is 80 seconds), or for
any other reason, the following will occur:
(a) The +15V power supply in the
selected 'main' transmitter will be
switched off, removing +15V from
A11J4-13 of the main transmitter and
from A11J4-20 of the standby
transmitter via the dual transmitter
interface assembly (unit 3). The
standby transmitter will turn on.
(b) If transmitter A is selected as the
'main' transmitter, the main/standby
relay in the transmitter A's harmonic
filter will de-energize and route the
'standby' (B) transmitter's output to the
antenna system.
(c) If transmitter B is selected as the
'main' transmitter, the main/standby
relay in the transmitter A's harmonic
filter will energize and route the
'standby' (A) transmitter's output to the
antenna system.
(d) The 'standby' transmitter will provide
+15V and the manually controlled
slewing commands (ATU CONT) for the
antenna system's antenna tuning unit
via the dual transmitter interface
assembly (unit 3).
(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
3A1J4-23 from A11J4-17 ('shutdown')
of transmitter A, causing a ground to
be applied to RMT CHGOV ALM outputs
3A1J1-8 and 3A1TB3-6, indicating the
standby transmitter is on.
(g) If transmitter B is selected as the
'main' transmitter, an open collector
SHTDN ALM (B)signal will be applied to
3A1J5-23 from A11J4-17 ('shutdown')
of transmitter B, causing a ground to
be applied to RMT CHGOV ALM outputs
3A1J1-8 and 3A1TB3-6, indicating the
standby transmitter is on.
4. INSTALLATION INFORMATION
Complete or verify the following
requirements are completed during
installation of the dual transmitter system.
NOTE
The following instructions include the
installation of two slide kits, Nautel Part
#158-8015 (one per transmitter). These slide
kits allow the transmitters to be pulled out of
the user-supplied cabinet to allow access to
the ND500II circuitry and support the weight
of the transmitter. Each transmitter weighs
approximately 41kg/90 lbs and cannot be
supported by only the transmitter’s front
panel mounting holes. If the slide kits are not
used, suitable provision must be taken to
support the transmitter in the rack. The
installation of the drawer mounting slides will
vary depending on the cabinet and may
require some modification to fit.
(a) Ensure the cabinet will not topple,
when the transmitters are extended on
their drawer slides, by securely bolting
the cabinet to its mounting surface.
(b) Install the drawer slides (from slide
kits P/N 158-8015) for both
transmitters. Figure 4 shows an
example of the installation. Ensure the
slides are secured to the cabinet, level
and positioned correctly to allow the
transmitters to be installed.
(c) Install the drawer slides on the
transmitters as shown in figure 4.
(d) Install transmitters A and B in the
cabinet (using the drawer slides)
ensuring transmitter A (ND500II-11x-
x2x) is located above transmitter B
(ND500II-01x-x2x). Figure 4 shows
the recommended orientation of
assemblies in the cabinet. Failure to
meet this layout may result in the
supplied cabling not fitting the cabinet.

Dual ND500II (User Supplied Cabinet) – IS03003 Page 3
Information Sheet Issue 1.0
(e) Install the cable harness (Nautel Part
# 158-8202) into the cabinet as
follows:
-Remove transmitter (A and B) rear
covers. Retain hardware to re-install
cover.
-Terminate the connectors on
transmitter A as follows:
Connect BNC connector P5 to A11J3
Connect D connector P6 to A11J4
Connect N connector P7 to A7J3
Connect wire # 45 to A11TB2-1
Connect wire # 46 to A11TB2-2
-Make the following connections if the
cabinet’s output connector is located
near cabinet lower right hand side:
Connect P10 to A7J2
Connect wire # 44 (core) to cabinet’s
RF output connector (center
conductor)
Connect wire # 44 (shield) to cabinet’s
RF output connector (shield)
If cabinet’s output connector is not
located near the cabinet’s lower right
hand side, do not terminate P10 or
wire # 44. Secure these wire ends to
the cable harness.
- Terminate the connectors on
transmitter B as follows:
Connect D connector P8 to A11J4
Connect BNC connector P9 to A11J3
Connect N connector P11 to A7J2
Connect wire # 47 to A11TB2-1
Connect wire # 48 to A11TB2-2
- Terminate the connectors on dual
transmitter interface assembly as
follows:
Connect D connector P3 to A1J5
Connect D connector P2 to A1J4
Connect BNC connector P1 to A1J7
Connect BNC connector P4 to A1J6
Connect wire # 45 to A1TB4-3
Connect wire # 46 to A1TB4-4
Connect wire # 47 to A1TB4-3
Connect wire # 48 to A1TB4-4
- Secure the cableform to the cabinet to
ensure the transmitters can be pulled
out on their slides and no wiring in the
cable can be pinched.
(f) If the computer remote control option
is installed, install cable harness
Nautel Part # 158-8212 as follows:
- Terminate the connectors on the
remote control assembly as follows:
Connect D connector P13 to A1J4
Connect wire 101 to TB1-1
Connect wire 103 to TB1-2
- Terminate the connectors on the dual
transmitter interface assembly as
follows:
Connect D connector P12 to A1J1
(g) Install the dual transmitter interface
assembly in the cabinet using the four
front panel mounting holes.
(h) Install the remote control unit in the
cabinet using the four front panel
mounting holes.
(i) Install the safety ground wiring using
green/yellow wire and lugs provided in
‘Safety Ground Wire Kit’ (Nautel Part #
158-8226) as follows:
- Transmitter A safety ground (located
at rear of transmitter) to cabinet safety
ground.
- Transmitter B safety ground (located
at rear of transmitter) to cabinet safety
ground.
NOTE
A cabinet safety ground should be located
near the RF output connector of the cabinet
to help protect equipment from lightning
damage.
(j) Connect AC line cords to transmitter A
and B. Termination is made at
transmitter rear.

Page 4 Dual ND500II (User Supplied Cabinet) – IS03003
Issue 1.0 Information Sheet
(k) If used, connect external 24 or 48
VDC power source wiring (see
ND500II manual for DC power source
options) to 3A1TB4-1 (+) and 3A1TB1-
2 (-).
(l) If used, connect external control/
monitor wiring to terminal blocks
(3A1TB1, 3A1TB2, 3A1TB3 and
3A1TB6) or D-sub connectors (3A1J1
and 3A1J8) as depicted in figure 1.
See figures 5 and 6 for dual
transmitter interface assembly/ PWB
detail.
NOTE
Refer to the associated ND500II transmitter
manual for instructions on enabling and
disabling the remote power trim feature.
If the optional remote control unit (unit 4) is
installed, refer to its service instruction
manual for detailed information regarding
remote control inputs/outputs.
(m) Connect a continuous, insulated 4
AWG copper wire or one-inch copper
braid between the station lightning/
safety ground and the cabinet's station
reference ground connection. Ensure
this wire does not contact any other
conductive surface of the cabinet.
(n) Connect the antenna system's RF
feed cable to the exterior portion of the
cabinet's RF output coaxial connector,
if present. If not, connect the feed
cable to A7J2 of transmitter A.
(o) Re-install rear covers on transmitters
(A and B) that were removed in step
(e).
5. INITIAL START-UP PROCEDURES
Transmitters A and B should not be fully
operated as a dual transmitter system until
each transmitter’s initial start-up procedure
(described in the ND500II instruction
manual) has been completed/ verified.
Verify the operation of each transmitter as
follows:
(a) Connect the dual system’s RF output
to a 250-watt dummy load.
(b) With both transmitters’ POWER
switches set to OFF, turn on the AC
power applied to the cabinet.
(c) Set transmitter A’s POWER switch to
ON. On the dual transmitter interface
panel, press LOCAL CONTROL and
SELECT A. Transmitter A should be
operating into the dummy load.
Perform initial start-up procedures as
described in the ND500II transmitter
manual.
(d) Set transmitter A’s POWER switch to
OFF and transmitter B’s POWER switch
to ON. On the dual transmitter
interface panel, press SELECT B.
Transmitter B should be operating into
the dummy load. Perform initial start-
up procedures as described in the
ND500II transmitter manual.
(e) Turn transmitters off, disconnect
dummy load and reconnect dual
transmitter for operation into the
system antenna.
(f) If the optional remote control unit (unit
4) is used:
- Set transmitters A and B and dual
interface assembly (unit 3) to remote
control mode, using their front panel
switches.

Dual ND500II (User Supplied Cabinet) – IS03003 Page 5
Information Sheet Issue 1.0
- Connect remote control unit to
associated master remote control unit
(see NAX219 service instruction
manual for interconnection detail
between slave and master).
- Verify remote control of transmitter
system is possible.
6. ON-AIR TRANSMITTER
SERVICING
The procedures in paragraphs 6.1 and 6.2
should be used when it is desired to
maintain one transmitter on-air while
servicing/testing another.
6.1 SERVICING TRANSMITTER B
WITH TRANSMITTER A ON-AIR:
If transmitter B is to be serviced and/or
tested with transmitter A on the air, proceed
as follows:
(a) Set dual transmitter interface
assembly’s MAIN TRANSMITTER –SELECT
switch to A.
(b) Set transmitter B's POWER switch to
OFF.
(c) Disable standby on/off control by
connecting a jumper between CR2-
Anode of transmitter B’s monitor PWB
(2A5) and ground.
(d) Disconnect the coaxial cable (P11)
from transmitter B's RF output coaxial
connector (2A7J2).
(e) Connect a 250-watt, precision, 50-
ohm, resistive dummy load to
connector 2A7J2 of transmitter B
using a suitable coaxial cable.
NOTE
The cable disconnected in step (d) is
tyrapped in the cable harness and should
not be used for connection between
transmitter B and an external dummy load.
A user-provided coaxial cable should be
obtained.
(f) Set transmitter B's LOCAL/REMOTE
switch to LOCAL.
(g) Set transmitter B’s POWER switch to ON
and perform servicing and/or testing
procedures on transmitter B.
(h) Upon successful completion of
maintenance procedures, set
transmitter B's POWER switch to OFF.
Reconnect cable removed in step (d)
and remove the jumper installed in
step (c).
(i) Set transmitter B's POWER switch to ON
and LOCAL/REMOTE switch to the
desired position.
6.2 SERVICING TRANSMITTER A
WITH TRANSMITTER B ON-AIR:
If transmitter A is to be serviced and/or
tested with transmitter B on the air, proceed
as follows:
(a) Set dual transmitter interface
assembly’s MAIN TRANSMITTER – SELECT
switch to B.
(b) Set POWER switch of both transmitters
to OFF.
(c) Disable standby on/off control by
connecting a jumper between CR2-
Anode of transmitter A’s monitor PWB
(1A5) and ground.
(d) Disconnect connector P11 from
transmitter B's RF output coaxial
connector (2A7J2).
(e) Disconnect connector P10 from
transmitter A's RF output coaxial
connector (1A7J2).
(f) Disconnect the antenna system cable
mating with the dual cabinet's RF
output coaxial connector or from
transmitter A’s RF output connector
(1A7J2).
(g) Connect the antenna system to
transmitter B’s RF output (2A7J2).

Page 6 Dual ND500II (User Supplied Cabinet) – IS03003
Issue 1.0 Information Sheet
(h) Connect a 250-watt, precision, 50-
ohm, resistive dummy load to
transmitter A's RF output coaxial
connector (1A7J2), using a customer-
provided coaxial cable.
(i) Set transmitter B's POWER switch to
ON.
(j) Set transmitter A's LOCAL/REMOTE
switch to LOCAL.
(k) Set transmitter A's POWER switch to ON
and perform servicing and/or testing
procedures on transmitter A.
(l) Upon successful completion of
maintenance procedures, set POWER
switches of both transmitters to OFF.
(m) Disconnect the dummy load from
transmitter A’s RF output coaxial
connector (1A7J2).
(n) Remove the antenna system cable
from transmitter B's RF output
connector (2A7J2) and reconnect it to
the cabinet's RF output coaxial
connector or to transmitter A’s RF
output connector (1A7J2).
(o) Restore coaxial cables to their original
connections.
(p) Remove jumper connected in step (c).
(q) Set POWER switch of both transmitters
to ON and set their LOCAL/REMOTE
switches to the desired position.
7. CHECK OF CHANGEOVER UNIT
Check the operation of the main/standby
changeover function 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) Verify transmitter A is producing the
desired RF output and transmitter B's
RF output is inhibited (MAIN
TRANSMITTER – SELECT switch set to A).
(c) Set transmitter A's KEYING switch (S1)
to OFF.
(d) After a time delay (between twenty
and eighty seconds), transmitter A's
RF output should be inhibited and
transmitter B should be enabled and
producing the desired output.
NOTE
If A11J4-21 of transmitter B is connected to
ground, transmitter B's 'standby 1' code
variation will be transmitted when transmitter
B turns on.
(e) Set transmitter A's KEYING switch (S1)
to ON.
(f) Reset transmitter A by setting its
POWER switch (S3) to OFF and then
return it to ON.

Dual ND500II (User Supplied Cabinet) – IS03003 Page 7
Information Sheet Issue 1.0
NOTE
If the dual transmitter cabinet's +15 VDC is used as voltage source for external SWR ALARM
and BATTERY STATUS circuits, connect circuit +VDC to 3A1TB2-8 (3A1J1-2).
If an external DC power supply is used as voltage source for external SWR ALARM and
BATTERY STATUS circuits, connect DC return to 3A1TB3-7 (3A1J1-6).
Figure 1 External Control/Monitor Interconnecting Wiring

Page 8 Dual ND500II (User Supplied Cabinet) – IS03003
Issue 1.0 Information Sheet
Table 1 - Wiring List – Dual ND500II Transmitters
SOURCE DESTINATION CODE SIZE REMARKS
P1-Centre P5-Centre 1 Core RG188A/U Coaxial Cable
P1-Body P5-Body 1 Shield -
P4-Centre P9-Centre 2 Core RG188A/U Coaxial Cable
P4-Body P9-Body 2 Shield -
P6-1 P2-24 3 White 22
P6-2 P2-13 4 White 22
P6-3 P2-4 5 White 22
P6-4 P2-5 6 White 22
P6-5 P2-14 7 Black 22
P6-6 P2-1 8 White 22
P6-7 P2-17 9 White 22
P6-8 P2-15 10 White 22
P6-9 P2-16 11 White 22
P6-11 P2-20 12 Black 22
P6-12 P2-21 13 White 22
P6-13 P2-11 14 White 22
P6-14 P2-7 15 White 22 1-Conductor
P6-15 P2-19 15 Shield 22 Shielded
P6-16 P2-8 16 Black 22
P6-17 P2-23 17 White 22
P6-18 P2-9 18 White 22
P6-19 P2-6 19 White 22
P6-20 P2-2 20 White 22
P6-21 P2-10 21 White 22
P6-22 P2-3 22 Black 22
P8-1 P3-10 23 White 22
P8-2 P3-25 24 White 22
P8-3 P3-4 25 White 22
P8-4 P3-5 26 White 22
P8-5 P3-17 27 Black 22
P8-6 P3-18 28 White 22
P8-7 P3-16 29 White 22
P8-8 P3-14 30 White 22
P8-9 P3-15 31 White 22
P8-11 P3-9 32 Black 22
P8-12 P3-1 33 White 22
P8-13 P3-19 34 White 22
P8-14 P3-7 35 White 22 1-Conductor
P8-15 P3-8 35 Shield 22 Shielded
P8-16 P3-20 36 Black 22
P8-17 P3-23 37 White 22
P8-18 P3-22 38 White 22
P8-19 P3-6 39 White 22
P8-20 P3-11 40 White 22
P8-21 P3-2 41 White 22
P8-22 P3-3 42 Black 22

Dual ND500II (User Supplied Cabinet) – IS03003 Page 9
Information Sheet Issue 1.0
Table 1 - Wiring List – Dual ND500II Transmitters (Cont.)
SOURCE DESTINATION CODE SIZE REMARKS
P7-Centre P11-Centre 43 Core RG58A/U Coaxial Cable
P7-Body P11-Body 43 Shield -
P10-Centre RF Output-Centre 44 Core RG58A/U Coaxial Cable
P10-Body Safety Ground 44 Shield -
3A1TB4-3 1A11TB2-1 45 White 10
3A1TB4-4 1A11TB2-2 46 Black 10
3A1TB4-3 2A11TB2-1 47 White 10
3A1TB4-4 2A11TB2-2 48 Black 10
User Cabinet -
Safety Ground
1-Safety Ground 49 Grn/Yel 14
User Cabinet -
Safety Ground
2-Safety Ground 50 Grn/Yel 14
Additional wiring when remote control unit (unit 4) is used:
P12-3 P13-36 100 White 22
P12-4 4TB1-1 101 White 22
P12-5 P13-24 102 White 22
P12-6 4TB1-2 103 Black 22
P12-7 P13-18 104 Black 22
P12-8 P13-21 105 White 22
P12-9 P13-26 106 White 22
P12-12 P13-20 107 White 22
P12-13 P13-25 108 White 22
P12-11 P13-2 109 White 22
P12-10 P13-1 110 White 22
NOTE: Destinations with a '1' prefix are located on transmitter A (upper).
Destinations with a '2' prefix are located on transmitter B (lower).
Destinations with a '3' prefix are located on dual transmitter interface assembly.
Destinations with a '4' prefix are located on optional remote control unit.