COBHAM Sailor 250 FleetBroadband Installation And Operation Instruction Manual
The COBHAM Sailor 250 FleetBroadband is a compact and lightweight maritime broadband communications system that provides reliable and high-speed internet access, voice, and data services at sea. With its small size and low power consumption, it is ideal for vessels of all sizes, including fishing boats, workboats, and yachts. The system includes a stabilized antenna and a below-deck unit that can be easily installed and configured. The Sailor 250 FleetBroadband also offers a range of features such as voice calls, SMS messaging, and fax services.
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DOCUMENT NUMBER
250-16-1
250
PASSENGER SPEAKER AMPLIFIER
INSTALLATION AND OPERATION MANUAL
REV "-" Sep 15, 2004
Cobham
6400 Wilkinson Drive
Prescott, AZ 86301-6164
(928) 708-1500
SEALED
2011.08.16
16:58:20
-07'00'
Amendment #3
CONFIDENTIAL AND PROPRIETARY TO COBHAM
Aug 9, 2011
250-16-1 Rev. 250 Passenger Speaker Amplifier Installation and Operation Manual
Cobham has acquired the assets of Nothern Airborne
Technology Ltd. and dB Systems Inc., and has reissued this manual in its entirety
Cobham will be responsible for all future amendments and revisions.
Aug 9, 2011
ENG-FORM: 820-0109.DOT
Amendment #3
CONFIDENTIAL AND PROPRIETARY TO COBHAM
Page ii
Aug 9, 2011
250-16-1 Rev. 250 Passenger Speaker Amplifier Installation and Operation Manual
Periodically Cobham will release manual amendments. In order to maintain the most accurate and up to date manual these amendments should be carried out immediately upon receipt and recorded on the following amendment record.
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Oct 21/04
Amendment Change
Aug 9/11 Incorporated ECR11040.
Added 250-[ ] MOD C.
Zack Pahlman
2011.08.16
11:05:03 -07'00'
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Melton
2011.08.16
14:37:12
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Amendment #3
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Aug 9, 2011
Manual: 250-16-1
Document #: 250-16-1 809-0003
INSTALL_OPS
MANUAL AMENDMENT
Amendment #: 3
Amendment Date: Aug 8, 2011
The purpose of this amendment is to update the 250 outline drawing and MOD table per ECR11040.
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ENG-FORM: 809-0108.DOT
Aug 9, 2011
PROPRIETARY AND CONFIDENTIAL TO COBHAM
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INSTALL_OPS
MANUAL AMENDMENT
Manual: 250-16-1
Document #: Install_Ops\250\809-0002
Amendment #: 2
Amendment Date: Oct 21, 2004
The purpose of this amendment is to update the 250 outline drawing.
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Amendment #2 Oct 21, 2004 Page 1
ENG-FORM: 809-0108.DOT
PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.
INSTALL_OPS
MANUAL AMENDMENT
Manual: SM250 250 Amendment #: 1
Document # SM250\Install_Ops\809-0001 Amendment Date: Sep 15, 2004
4
3
The purpose of this amendment is to update all applicable drawings.
Amendment Instructions:
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Page 1
ENG-FORM: 809-0108.DOT
PROPRIETARY AND CONFIDENTIAL TO NORTHERN AIRBORNE TECHNOLOGY LTD.
EQUIPMENT MANUAL 250-16-1 REV -
DATE
3-11-03
CHANGE RECORD
CHANGE
ORIGINAL DOCUMENT RELEASED
APPROVAL
250/250-16-1 Page a
EQUIPMENT MANUAL 250-16-1 REV -
TABLE OF CONTENTS
Page
1.0 OPERATING INSTRUCTIONS AND EQUIPMENT LIMITATIONS ................................................1
2.0 SPECIFICATIONS ..........................................................................................................................3
3.0 INSTALLATION PROCEDURES, WIRING DIAGRAM, AND LIMITATIONS..................................6
3.1 PHYSICAL.......................................................................................................................................6
3.2 ELECTRICAL ..................................................................................................................................6
Tables
Table A Detail Part Numbers...............................................................................................................c
Table B Figures with Applicable Serial Numbers ................................................................................d
Table 1 Pin Identification.....................................................................................................................9
Table 2 Environmental Qualification Form........................................................................................13
Figures / Drawings
250 Outline, Model 250-[ ], Passenger Speaker Amplifier (Rev 1.90) ........................................7
Figure 2 Model 250-[ ] Block Diagram................................................................................................8
Figure 3 Model 250-[ ] Wiring Diagram ............................................................................................10
Figure 4 Internal Trim Pot Adjustments..............................................................................................13
250/250-16-1 Amendment #3 Aug 9, 2011
PROPRIETARY AND CONFIDENTIAL TO COBHAM
Page b
EQUIPMENT MANUAL 250-16-1 REV -
MODEL 250 DETAIL PART NUMBER DESCRIPTIONS
The detail part numbers associated with the Model 250 Passenger Speaker Amplifier may define different level adjustments and/or test procedures than those outlined in the calibration and test table of document No. 250-4, Acceptance Test Procedure. Table A describes those differences.
NOTE: A Model 250 with an associated detail part number is designated as a Model 250-XXX, where XXX is the applicable detail part number.
Table A. Detail Part Number Description
Detail Part Number Description of Difference
001 Low Pass Filters adjusted for –3 dB attenuation at 70 Hz on Left and Right Speaker Outputs. High Pass Filters adjusted for –3 dB attenuation at 20 Khz on Left and Right Speaker Outputs.
002
003
-001 calibration is designed for use with dB Systems 250-61, 4-inch speakers.
MOD A units use PCB 250-81 to prevent speaker popping on power up. MOD B units include PCB 250-91 in place of PCB 250-
81. MOD C units include modifying component value of C1 and
C27 to fix high frequency oscillation problem.
PCB 250-52 includes the increased stereo gain.
The Model 250-002 has no differences from the Base Model.
MOD A units use PCB 250-81 to prevent speaker popping on power up. MOD B units include PCB 250-91 in place of PCB 250-
81. MOD C units include modifying component value of C1 and
C27 to fix high frequency oscillation problem.
PCB 250-52 includes the increased stereo gain.
Identical to Base Model with the following changes:
- Stereo Left and Stereo Right inputs are reduced to 0.45 Vrms.
- Stereo Left and Stereo Right input gain is increased so that the outputs are the same as the Base Model.
MOD A units use PCB 250-81 to prevent speaker popping on power up. MOD B units include PCB 250-91 in place of PCB 250-
81. MOD C units include modifying component value of C1 and
C27 to fix high frequency oscillation problem.
PCB 250-52 includes the increased stereo gain.
250/250-16-1 Amendment #3 Aug 9, 2011
PROPRIETARY AND CONFIDENTIAL TO COBHAM
Page c
EQUIPMENT MANUAL 250-16-1 REV -
250-16-1 FIGURES
This page lists the drawings necessary for complete maintenance and troubleshooting.
The applicable serial numbers are shown in the right hand column.
Previously only the most current revision of each figure was included in this manual. For these figures, the rev is listed as "N/A".
Table B. Figures with Applicable Serial Numbers
FIGURE/DWG REV. DESCRIPTION
250
2
3
4
1.90
N/A
N/A
Passenger Speaker Amplifier
Passenger Speaker Amplifier
Passenger Speaker Amplifier
TYPE SERIAL #
Outline All
Block Diagram All
Wiring Diagram All
N/A Passenger Speaker Amplifier Internal Trim Pot Adjustments All
250/250-16-1 Amendment #3 Aug 9, 2011
PROPRIETARY AND CONFIDENTIAL TO COBHAM
Page d
EQUIPMENT MANUAL 250-16-1
EQUIPMENT MANUAL
MODEL 250-[ ]
1.0 OPERATING INSTRUCTIONS AND EQUIPMENT LIMITATIONS
The Model 250 Passenger Speaker Amplifier is a remotely controlled, electronic unit that operates upon command from switches and potentiometers in the cockpit or cabin of the aircraft. The
Model 250 provides Seat Belt and No Smoking sign chime tones, a Cabin Call ringer tone, ADF,
Pilot Select Comm., TV, Briefer and Cabin Paging audio, all in mono, to the cabin speakers. It also provides audio taken from an external AM/FM stereo receiver/cassette tape or CD player, in stereo, to the cabin speakers.
Both left and right speaker amplifier channels are each powered through separate internal fuses, so that a failure in one speaker channel will not disable the other speaker channel or the remaining control circuitry.
All inputs and operating modes are electronically switched. Ground signals, supplied by manual switches in the cockpit, enable the electronic switches in the Model 250. The circuitry is arranged to give Paging and Brief audio priority; the PA MIC or Brief switch signals essentially open the
Stereo Left, Stereo Right, ADF 1, ADF 2, Pilot Select COMM, and TV audio inputs. Microphone bias current is available from the Model 250 for the PA MIC microphone input.
Electronic attenuators are employed to control paging volume and master receiver (ADF 1, ADF 2,
PSC, and TV) volume. The attenuators each have approximately 30 dB (min.) of range and are each controlled by a remote volume potentiometer. The pots required are zero to 10,000 ohm, linear taper and are electrically arranged to provide maximum resistance for maximum volume.
The audio source (stereo tape cassette player, etc.) for the Stereo Left and Right inputs should have its own volume control attenuator for the Stereo Input to Speaker Output audio channel.
A musical chime tone is provided to the cabin speakers to alert the passengers of a change in the
Fasten Seat Belt or No Smoking sign status. A Cabin Call ringer tone is also provided to the cabin speakers for a cockpit to cabin intercom system. The chime and ringer tones do not pass through either of the electronic attenuators. Internal screwdriver potentiometer adjustments are accessible, after removal of the Model 250 end plate, to set the chime or ringer levels heard in the passenger speakers.
The Left and Right Speaker Amplifier output ratings are each 28 watts into 2 ohms (30 Watts typical). Both speaker amplifier outputs are internally protected against open and short circuits as well as over-temperature (>105°C).
250/250-16-1 Page 1
EQUIPMENT MANUAL 250-16-1
The operating modes of the Model 250 are established when either a ground (low) signal or a 12 to 32 VDC (high) signals applied as listed below to the connector pin listed:
Signal
P50-16 Low ADF 1 Switch Connects ADF 1 input
audio Right
P50-15 Low ADF 2 Switch Connects ADF 2 input
audio Right
P50-13
P50-5
Low
Low
TV Swith
Stereo Switch outputs.
Connects TV input audio
Connects Stereo Left and
P50-24 Low PA Key Connects PA MIC input
P50-25 Low Briefer Switch Connects Briefer input
P50-31 High No Smoking input circuits.
Chime tone to Left and
Right outputs.
P50-32 High Seat Belt Chime tone to Left and
Right outputs.
P50-33
P50-34
Low Cabin Call Ringer tone to Left and
Right outputs.
Low Hook Switch Disables ringer tone.
*An application or removal of a high signal at pins P50-31 and P50-32 will provide a chime tone at
Left and Right Speaker outputs.
NOTE: P50-XX is a pin on the 37 pin connector, P50-1.
P40-XX is a pin on the 25 pin connector, P40-1.
250/250-16-1 Page 2
EQUIPMENT MANUAL 250-16-1
All internal screwdriver potentiometer adjustments of the Model 250 are set to factory standards.
If it is necessary to change a setting, refer to the calibration and maintenance section of this manual.
The amplifiers are adjusted for acceptable listening output levels into the proper loads with ADF receiver inputs of 7.75 V
RMS
and PSC, TV, Stereo and Brief audio inputs of 1.00 V
RMS
. With the volume controls set to maximum volume position, these inputs will provide 7.8 VRMS (28 watts) into 2 ohms at each speaker output. The receiver input levels are realized when receivers are set for 100 milliwatts into 600 ohms. If these levels are greatly exceeded at the inputs, the audio will become distorted due to peak clipping and audio bleedthrough will be noticed. The amplifiers, however, will not be damaged.
2.0 SPECIFICATIONS
Input specifications are expressed in volts RMS, rather than milliwatts, to avoid any misunderstanding.
INPUTS:
ADF:
PSC:
Two single, switched audio inputs for ADF, etc. Input level is 7.75 V
RMS
.
One single, switched audio input compatible with the Pilot Select COMM output of dB Systems cockpit audio control amplifiers such as Model 438 and 700 which provides a 1.00 V
RMS
signal produced from a summation of selected COMM, DME, and MKR receivers.
TV: One single, switched audio input for TV, etc. Input level is 1.00 V
RMS
.
STEREO LEFT: One single, switched differential audio input for the left channel of stereo audio from an AM/FM stereo receiver/tape or CD deck, etc. Input level is maximum 1.00 V
RMS
(at maximum source volume) and audio LO is not common to that of other inputs.
STEREO RIGHT: Same as Stereo Left, switched by the same control input as Stereo Left.
BRIEF: One single, switched audio input for briefer audio, etc. Input level is
1.00 V
RMS
.
PA MIC: The microphone input, used for cabin paging audio, supplies bias current and is compatible with carbon and amplified dynamic microphones.
PAGING VOLUME: Controls level of PA MIC and Brief audio inputs to the PA Sidetone and Left and Right Speaker outputs. Volume control range is 30 dB (minimum) controlled by a 10,000 ohm, 1/2 Watt, linear pot. Maximum volume is with maximum resistance.
250/250-16-1 Page 3
EQUIPMENT MANUAL 250-16-1
RECEIVER
VOLUME: Controls level of ADF, PSC and TV audio inputs to the Left and Right
Speaker outputs. Range and control same as Paging Volume specification.
OUTPUTS:
RIGHT SPEAKER: The Right Speaker Amplifier is designed for speech and music signals.
Rated Power spec. is the maximum power the amplifier can continuously deliver into the maximum rated load without clipping.
Load
1 ohm
2 ohm
4 ohm
LEFT SPEAKER:
PA SDTN:
49 W
28 W
15 W
Same as Right Speaker specification
Load
1 ohms (40 Watts typical)
2 ohms (30 Watts typical)
4 ohms (18 Watts typical)
This output will deliver 6.7 milliwatts into 600 ohms, continuously. Rated and continuous power ratings are the same.
CHIME TONE: Generated and supplied to left and right speaker outputs when 12 to 32
VDC is applied to and removed from connector pins P50-31 or P50-32. A
790 +20 Hz tone. Factory set for 3.5 VP-P into 2 ohms, is adjustable from
1.0 to VP-P.
RINGER TONE: Generated and supplied to left and right speaker outputs when a ground signal is applied to connector pin P50-33. Ringer tone is 700 +75 Hz tone,
ON for 1.8 +0.1 second, then OFF for 3.2 +0.1 second, repeating, and is factory set for 1.5 VP-P (700 Hz component) into 2 ohms, adjustable from
0 to 5.2 VP-P.
FREQUENCY
RESPONSE: Upper and lower frequency limits are adjustable. Stereo, ADF, TV, PSC inputs to speaker outputs are flat within 3 dB from 25 Hz to 20,000 Hz. All other inputs to speaker or PA sidetone outputs are flat within 3 dB from 350
Hz to 6,000 Hz.
HARMONIC
DISTORTION
(THD+N): Less than 0.25 percent distortion, for stereo and less than 1% for ADF, TV and PSC to all outputs (25 Hz to 20 Khz). Less than 3% for PA and briefer to all outputs (350 Hz to 6 Khz).
250/250-16-1 Page 4
EQUIPMENT MANUAL 250-16-1
ISOLATION BETWEEN CHANNELS:
OUTPUT NOISE:
60 dB, Minimum.
Greater than 75 dB below rated, all outputs.
28 VDC, 5 ampere maximum. POWER SUPPLY:
OPERATING TEMPERATURE: From -55 to +70°C. Thermal fold back of the speaker outputs occurs if the heatsink temperature reaches 105°C.
OPERATING ALTITUDE: To 70,000 feet.
QUALIFIED TO: FAR PART 21, TSO-C50c
[A2F2]-BA(CL)XXXXXXZ(BZ)AAATZ(XXC2)XX
Qualification Form, for test category information.
250/250-16-1 Page 5
EQUIPMENT MANUAL 250-16-1
3.0 INSTALLATION PROCEDURES, WIRING DIAGRAMS, AND LIMITATIONS
3.1 PHYSICAL
Installation dimensions are shown on the Model 250 outline on Figure 1. The amplifier may be mounted to a metal or plastic surface, but it is necessary to ground the case to the metal aircraft structure. When mounting to a plastic surface, use a grounding strap. The case is finished with an electrically conductive film so it is not necessary to remove the film for electrical bonding.
The Model 250 may be mounted in any position. No shock or vibration isolators are required.
3.2 ELECTRICAL
Connections to the Model 250 are made through two "D" subminiature connectors. The mating connectors are manufactured by Positronics Industries, Inc. and have part numbers for the complete connector assemblies, which are:
Connector Positronics Part No.
P40 (25-pin) SD25F1OJVLO
P50 (37-pin) SD37F1OJVLO
Numerical pin identification is shown on Table 1. The wiring diagram is shown on Figure 2.
Shielded wire must be used where indicated on the diagrams. AWG 24-26 size wire should be used for all connections except those to the input power, power ground, and speaker amplifier outputs where AWG 20 (min.) size should be used.
The control switches shown will switch low current loads and should have a DC rating of 28 VDC.
Typical switches for this application include Alco MTA series.
250/250-16-1 Page 6
Amendment #3 Page 7
EQUIPMENT MANUAL 250-16-1
250/250-16-1
Figure 2. Block Diagram, Model 250-XXX
Passenger Speaker Amplifier
Page 8
EQUIPMENT MANUAL 250-16-1
The paging and receiver volume control pots required are linear taper, zero to 10,000 ohms, 1/2 watt or greater. Electrically, the pots are wired to provide maximum resistance to the Model 250 for full volume (fully clockwise rotation).
Table 1. Pin Identification
P40 (25-pin connector):
1 Left Speaker Out HI
2 Left Speaker Out HI
3 Left Speaker Out LO
4 Left Speaker Out LO
5 Left Speaker Out LO
6 28 VDC
7 28 VDC
8 28 VDC
9 Right Speaker Out LO
10 Right Speaker Out LO
11 Right Speaker Out LO
12 Right Speaker Out HI
13 Right Speaker Out HI
P50 (37-pin connector):
1 Audio Common (except stereo)
2 PA MIC Hi
3 Paging Volume
4 Briefer Audio Hi
5 Stereo Switch
6 Left Input HI
7 Left Input LO
8 Right Input LO
9 Right Input HI
10 No Connection
11 Receiver Volume Control
12 No Connection
13 TV Switch
14 PSC Switch
15 ADF 2 Switch
16 ADF 1 Switch
17 ADF 1 Audio HI
18 TV Audio HI
19 PSC Audio HI
14 Left Speaker Out HI
15 No Connection
16 No Connection
17 Power Ground
18 Power Ground
19 Power Ground
20 Power Ground
21 28 VDC
22 Chassis Ground
23 No Connection
24 No Connection
25 Right Speaker Out Hi
20 Audio Common (except stereo)
21 Audio Common (except stereo)
22 Audio Common (except stereo)
23 No connection
24 PA Key
25 Briefer Switch
26 No Connection
27 Audio Common (except stereo)
28 Audio Common (except stereo)
29 No Connection
30 No Connection
31 Smoking Sign Switch
32 Seat Belt Sign Switch
33 Cabin Call Switch
34 Hook Switch
35 PA Sidetone HI
36 Audio Common (except stereo)
37 ADF 2 Audio HI
250/250-16-1 Page 9
EQUIPMENT MANUAL 250-16-1
250/250-16-1
Figure 3. Wiring Diagram
Page 10
EQUIPMENT MANUAL 250-16-1
250/250-16-1
Figure 3. Wiring Diagram
(continued)
Page 11
EQUIPMENT MANUAL 250-16-1
250/250-16-1
Figure 3. Wiring Diagram
(continued)
Page 12
EQUIPMENT MANUAL 250-16-1
250/250-16-1
Figure 4. Internal Trim
Pot Adjustments
Page 13
EQUIPMENT MANUAL 250-16-1
Table 2. Environmental Qualification Form
NOMENCLATURE: Passenger Speaker Amplifier
TYPE/MODEL/PART NO.: Model 250-[ ] TSO NUMBER: TSO-C50c
MANUFACTURER'S SPECIFICATION AND/OR OTHER APPLICABLE SPECIFICATION: dB Systems
Systems,
ADDRESS: 2847 152nd Ave. N.E., Redmond, WA 98052
Conditions
DO-160C
Section/
Paragraph
Description of Conducted Tests
Temperature and altitude
Low temperature
High temperature
In-flight loss of cooling
Altitude
Decompression
Overpressure
Temperature variation
Humidity
Operational shocks and
Crash safety
Operational shocks
Crash safety
Vibration
4.0
4.5.1
4.5.2
4.5.3
4.5.4
4.6.1
4.6.2
4.6.3
5.0
6.0
7.0
7.2
7.3
8.0
Equipment tested to Category F2.
(see also temperature variation)
(see also temperature variation)
(see also temperature variation)
Equipment does not require special cooling.
Equipment tested at +70,000 feet.
Equipment tested to Category A2, except decompressed to +55,000 feet.
Equipment tested to Category A2.
Equipment tested to Category B; combined with 4.5.1, 4.5.2, & 4.5.3.
Equipment tested to category A requirements.
Equipment tested without shock mounts per
DO-160C, paragraphs 7.2.1, 7.3.1, 7.3.2, &
7.3.2.2.
Explosion proofness
Waterproofness
Fluids susceptibility
9.0
10.0
11.0
Equipment tested without shock mounts to
Category L, except extended curve 150-2,000
Hz 3g pk. Equipment tested without shock mounts to Category C. No change in critical frequencies during tests.
Equipment identified as Category X, no test required.
Equipment identified as Category X, no test required.
Equipment identified as Category X, no test required.
250/250-16-1 Page 14
EQUIPMENT MANUAL 250-16-1
Table 2. Environmental Qualification Form (continued)
TYPE/MODEL/PART NO.: Model 250-[ ]
CONDITIONS
DO-160C
SECTION/
PARAGRAPH
DESCRIPTION OF CONDUCTED TESTS
Sand and dust
Fungus resistance
Salt spray
Magnetic effect
Power input
Voltage spike
Audio frequency conducted susceptibility
Induced signal susceptibility
Radio frequency susceptibility
Emission of radio frequency energy
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
21.0
Equipment identified as Category X, no test required.
Equipment identified as Category X, no test required.
Equipment identified as Category X, no test required.
Equipment is Class Z.
Equipment tested to Categories B and Z.
Equipment tested to Category A.
Equipment tested to Category A.
Equipment tested to Category A.
Equipment tested to Category T.
Equipment tested to Category Z.
Lightning induced transient susceptibility
Lightning direct effects
22.0 Equipment tested to Category XXC2.
Icing
23.0
24.0
Equipment identified as Category X, no test required.
Equipment identified as Category X, no test required.
Other Tests: Acceptance tests in accordance with dB Systems’ Acceptance Test Procedures 250-4 and performance tests in accordance with RTCA Document DO-214, Section 2.8 were conducted on the Model 250 qualification test unit during and/or after each environmental test, as appropriate.
Remarks:
•
Tests of DO-160C, Sections 4.0 (paragraphs 4.5.1, 4.5.2, and 4.5.3), 5.0, 16.0, and 18.0 were conducted at dB Systems, Inc. in Redmond, Washington.
•
Tests of DO-160C, Sections 4.0 (paragraphs 4.6.2 and 4.6.3) and 20.0 (radiated susc.), were conducted at Sundstrand Data Control, Inc. in Redmond, Washington.
•
Tests of DO-160C, Sections 4.0 (paragraph 4.6.1), 7.0, 8.0, 15.0, 17.0,19.0, 20.0 (conducted susc.), 21.0, and 22.0 were conducted at Eldec Corporation in Lynnwood, Washington.
250/250-16-1 Page 15

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