Northern Airborne Technology 3110 User Manual
SM3110
3110
Audio Control Panel
INSTALLATION AND OPERATION MANUAL
REV 4.00 August 25, 2005
Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone (250) 763-2232
Facsimile (250) 762-3374
Copyright 2005 by Northern Airborne Technology
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM3110 Rev. 4.00 3110 Audio Control Panel Manual
Performed at factory
Performed at factory
Periodically NAT 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.
AMENDMENT RECORD
Amendment
Number
Amendment
Date
Note: Revision 4.00 is the first public release of this document
Section(s)
Changed
Date
Entered
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1 Sep 27,05 2
2 Nov 21,06 1,2
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Insert any Amendment Instruction sheets after this page.
INSTALL_OPS
MANUAL AMENDMENT
Manual: SM3110 Amendment #: 2
Document # SM3110\Install_Ops\809-0002 Amendment Date: Nov 21, 2006
The purpose of this amendment is to add the most recent parts to the Unit
Nomenclature, record the installation kit, and add the custom Mechanical Installation
drawing to the manual.
Amendment Instructions:
1
1-9 Rev 4.00 1-9 Rev 4.00 Amendment 2
2-5 Rev 4.00 Amendment 1 2-5 Rev 4.00 Amendment 2
2
3110\922-0 Rev 1.01 3110\952-0 Rev 1.00
Note: Ensure that all drawings are inserted in the order shown on the latest drawing lists.
Remove Drawings (Section 2) Replace or add Drawings (Section 2)
3 Update the Amendment Record sheet at the front of the manual.
4 Insert this page into the manual after the Amendment Record sheet (page ii).
Manual Amendment ends after the following amended pages
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Amendment #2 Nov 21, 2006 Page 1
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INSTALL_OPS
MANUAL AMENDMENT
Manual: SM3110 Amendment #: 1
Document # SM3110\Install_Ops\809-0001 Amendment Date: Sep 27, 2005
The purpose of this amendment is to update the mechanical installation drawing.
Amendment Instructions:
1
2
Note: Ensure that all drawings are inserted in the order shown on the latest drawing lists.
Remove Drawings (Section 2) Replace With (Section 2)
3 Update the Amendment Record sheet at the front of the manual.
4 Insert this page into the manual after the Amendment Record sheet (page ii).
Manual Amendment ends after the following amended pages
Remove Pages Replace With Pages
2-5 Rev 4.00 2-5 Rev 4.00 Amendment #1
3110\100\922-0 Rev 1.00 3110\100\922-0 Rev 1.01
Amendment #1 Sep 27, 2005 Page 1
ENG-FORM: 809-0109.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM3110 Rev. 4.00 3110 Audio Control Panel Manual
Table of Contents
Section Title Page
1 Description
1.1 Introduction 1-1
1.2 Purpose of Equipment 1-1
1.3 Features 1-1
1.4 Specifications 1-2
1.4.1 Electrical Specifications 1-2
1.4.2 Physical Specifications 1-8
1.4.3 Environmental Specifications 1-8
1.5 Unit Nomenclature 1-9
2 Installation
2.1 Introduction 2-1
2.2 Unpacking and Inspection 2-1
2.2.1 Warranty 2-1
2.3 Installation Procedures 2-1
2.3.1 Warnings 2-1
2.3.2 Cautions 2-2
2.3.3 Cabling and Wiring 2-2
2.3.4 Mounting 2-2
2.3.5 Installation Notes 2-3
2.3.6 Post-Installation Checks 2-4
2.4 Continued Airworthiness 2-4
2.5 Accessories Required But Not Supplied 2-5
2.6 Installation Drawings 2-5
3 Operation
3.1 Introduction 3-1
3.2 General 3-1
3.3 Operation 3-1
3.3.1 Power Up/Down 3-1
3.3.2 Transmitter Selection 3-2
3.3.3 Receiver Selection 3-2
3.3.4 INPH (Interphone) Volume Control 3-3
3.3.5 Navigation Filter Selection 3-3
3.3.6 ST (Sidetone) Volume Control 3-3
3.3.7 VOX Selection 3-3
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SM3110 Rev. 4.00 3110 Audio Control Panel Manual
Section Title Page
3.3.8 MUTE (Marker Beacon Mute) Selector 3-4
3.3.9 SPKR (Speaker) Control 3-4
3.3.10 HDPH (Headphone) Control 3-4
3.3.11 Power Off Emergency Mode 3-4
3.3.12 Service Interphones 3-5
3.3.13 Passenger Address 3-5
3.3.14 PTT 3-5
3.4 External Control Functions 3-5
3.4.1 Emergency Mode Switch and Annunciator 3-5
3.4.2 Oxygen Mask Mode 3-6
3.4.3 Cabin Call Tone 3-6
3.4.4 Speaker Mute (AUX MUTE) 3-6
3.4.5 Aural Warning Volume 3-6
3.4.6 Cockpit Voice Recorder (CVR) Audio output 3-7
3.4.7 Annunciator Test 3-7
3.4.8 Aural Warning Priority 3-7
Aug 25, 2005 Page iv
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SM3110 Rev. 4.00 3110-100 Audio Control Panel Manual
Section 1 Description
1.1 Introduction
This manual contains information on the 3110-100 Audio Control Panel (ACP). All
derivative products will be covered by manual supplements, which can be obtained from
NAT as required.
Information in this section consists of purpose of equipment, features and specifications.
1.2 Purpose of Equipment
The model 3110-100 Audio Control Panel is a self-contained audio selection and mixing
panel compatible with the Rockwell Collins Pro Line 21 series radios (or equivalent).
Each 3110-100 provides selection of multiple transceivers, receivers, interphone circuits
and auxiliary functions from a basic front panel interface. The interface between the
radios and the 3110-100 and between multiple 3110 units is analog only.
1.3 Features
The 3110-100 ACP provides analog audio interfaces and Push-To-Talk (PTT) discretes
to the Rockwell Collins Pro Line 21 radios. The 3110-100 is an analog audio controller
with additional features for mixing and control of Aural Warning muting, front panel
control and audio amplification for headphone, speaker, CVR, interphone, radio
transmitter/receiver audio and keying.
Analog interfacing provides flight station interphone access, service interphone and radio
receiver/transceiver features. Various other analog features are also provided, including a
cockpit voice recorder output and emergency mode radio I/O. All interfacing is
accomplished through a 128 pin MIL-DTL-38999 Series II connector with alternate keying.
The 3110-100 converts standard aircraft power for its own use through its internal
power supply.
The 3110-100 provides:
• Three-position Service Interphone with ability for the pilot to connect to the Service
Interphone via the CAB function, with Cabin Call to alert the pilot.
• Transmit selection for four radios plus CAB (COM6) and PA, receive audio selection
for four Comm radios plus CAB (COM6), PA, and seven Navigation radios.
Individual receive audio volume control is provided for each receiver.
Aug 25, 2005 Page 1-1
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3110-100 Audio Control Panel Manual SM3110 Rev. 4.00
• Dynamic VOX system for noise reduction. This system removes unwanted
background noise that might be picked up by the pilot’s microphone, and prevents it
from entering the interphone channel.
• Protection circuits to help prevent accidental damage from overvoltage and reverse
voltage conditions.
• Five direct audio Aural Warning inputs with priority for inputs 1 and 2.
• Automatic fail-safe operation in the event of a power failure.
• A Voice/Ident filter for the NAV and ADF inputs.
• A MKR mute function to temporarily mute the marker beacon audio.
• A CVR audio output, which includes pilot Hot Mic audio.
• An OXY mode to minimise pilot workload when switching to use of an oxygen mask.
• Noise gating to minimise unwanted audio noise at the pilot headset and cockpit
speaker outputs.
1.4 Specifications
1.4.1 Electrical Specifications
1.4.1.1 Power Input
Operating Voltages:
Maximum +30.3 Vdc
Nominal +28.0 Vdc
Minimum +22.0 Vdc
Emergency +18.0 Vdc
Annunciator Lighting 0 - 28 Vdc
Backlighting 0 - 5 Vdc
1.4.1.2 Input Signals
Microphone: (BOOM/MASK MIC, HAND MIC, SVC MIC)
Specification TSO-C58a (RTCA/DO-170)
Type Differential, AC coupled, transformerless
Impedance 150 Ω
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SM3110 Rev. 4.00 3110-100 Audio Control Panel Manual
Input Level, Rated 250 mVrms
Dynamic Range 20 mVrms - 1.5 Vrms (MIC input to COM output only)
DC Bias: 22 ±5 mA at 15 Vdc
Keyline: (RADIO PTT, CKPT INPH PTT, HAND MIC
PTT, SVC PTT)
Level: Open (≥100 kΩ) (Inactive)
GND (<30 Ω) (Active)
Source Current: <20 mA
Discrete Input: (AUX MUTE INHIBIT, AUX LEVEL, AUX MUTE
SWITCH, CABIN CALL SW, EMER MODE IN,
OXY SWITCH, ANNUNC TEST)
Level: 18.5 to 36 V (HI)
<3.5 V (LO)
Impedance: ≥100 kΩ, AUX MUTE INHIBIT ≥ 50 kΩ
Source Current: <20 mA
Analog Receiver/Sidetone: (RCVR, SDTN)
Type: Differential, AC coupled, transformerless
Input Level: See Table 1
Impedance: 2 kΩ single ended (LO grounded), or
4 kΩ differential
Analog Aural Warning: (AUX)
Type: Differential, AC coupled, transformerless
Input Level: See Table 2
Impedance: 10 kΩ single ended (LO grounded) or
20 kΩ differential
Priority Detection Threshold: 90 ± 20 mVrms
EMER Receiver: (VHF BKUP RX)
Type: Single ended, transformerless, passive resistor
bypass
Input level: 7.75 Vrms nominal
EMER Aural Warning: (AUX BKUP)
Type: Single ended, transformerless, passive resistor
bypass
Input level: See Table 2 in section 1.4.1.3
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3110-100 Audio Control Panel Manual SM3110 Rev. 4.00
1.4.1.3 Output Signals
Headphone: (PLT HDPH, SVC HDPH)
Headphone Type Single ended, AC coupled, transformerless,
short circuit protected
Impedance: ≤20 Ω
Output load: 150 Ω Minimum, 1 µF Maximum
Volume range: 39 ±5 dB (PLT HDPH only)
Rated power:
PLT HDPH: 240 mW into 150 Ω (6.0 ±1.0 Vrms)
SVC HDPH: 6.6 mW into 150 Ω (1.0 ±0.1 Vrms)
Distortion: <2% nominal
Cabin Call Tone Level: 2.5 ±1.0 Vpp
EMER Mode: -20 ±3 dB relative to input
Microphone: (COM MIC)
Microphone Type: Differential, AC coupled, transformerless, short
circuit protected
Impedance: 100 Ω ±20% (when keyed)
Output Load: 150 Ω ±20%
Dynamic Range: 20 mVrms to 1.5 Vrms, (2.12 V peak)
Nominal: 350 ±50 mVrms
Rated Power: 15 mW into 150 Ω (1.5 ±0.05 Vrms)
Distortion: <2% nominal
Passenger Address: (PA MIC)
Type: Differential, AC coupled, transformerless, short
circuit protected
Impedance: 100 Ω ±20% (when keyed)
Output load: 150 Ω ±20%
Dynamic Range: 10 to 750 mVrms
Nominal: 175 ±25 mVrms
Rated power: 3.8 mW into 150 Ω (750 ±25 mVrms)
Speaker: (CKPT SPKR)
Type: AC coupled, bridge output, short circuit
protected
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Distortion: <2% nominal
SM3110 Rev. 4.00 3110-100 Audio Control Panel Manual
Load Impedance: ≥8 Ω
Output Impedance: ≤4 Ω
Volume range: 39 ±5 dB
Rated power: 8 W into 8 Ω (8 ±1 Vrms)
Distortion: <2% nominal.
Cabin Call Tone Level: 3.8 ±1.2 Vpp
Keyline: (COM PTT, PA PTT, VHF BKUP PTT)
Level: Open (≥100 kΩ) (Inactive)
GND (<30 Ω) (Active)
Sink Current: <20 mA
Discrete Output
: (EMER MODE OUT, AUX MUTE ANNUNC,
PA STEREO MUTE)
Level: 18.5 to 36 V (HI)
<3.5 V (LO)
Sink Current: <100 mA
Cockpit Voice Recorder
: (CVR)
Type: Differential, AC coupled, transformerless, short
circuit protected
Impedance: <600 Ω
Load Impedance: 5000 Ω
Level: 40 mVrms to 3.0 Vrms
Output power: 1.8 mW into 5000 Ω (3.0 ±0.2 Vrms)
Distortion: <2% nominal.
EMER Mode: -20 ±3 dB relative to input
EMER Microphone
: (VHF BKUP TX)
Type: Single ended, transformerless, passive bypass
through relay contacts.
Load Impedance: 150 Ω
Aug 25, 2005 Page 1-5
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3110-100 Audio Control Panel Manual SM3110 Rev. 4.00
Pin Name Signal Name Source
Nominal
Level
RCVR1 COM1 RECEIVER TRANSMITTER 7.75 Vrms
RCVR2 COM2 RECEIVER TRANSMITTER 7.75 Vrms
RCVR3 COM3 RECEIVER TRANSMITTER 7.75 Vrms
RCVR4 HF RECEIVER TRANSMITTER 7.75 Vrms
RCVR5
COM5
RECEIVER TRANSMITTER 7.75 Vrms
(SPARE)
RCVR6
COM6 RECEIVER TRANSMITTER 7.75 Vrms
(OPTION)
RCVR7 PA PA RECEIVER TRANSMITTER 3.88 Vrms
RCVR8 NAV1 VOR/LOC RECEIVER 7.75 Vrms
RCVR9 NAV2 VOR/LOC RECEIVER 7.75 Vrms
RCVR10 DME1 DME RECEIVER 5.30 Vrms
RCVR11 DME2 DME RECEIVER 5.30 Vrms
RCVR12 MKR MARKER BEACON RECEIVER 5.48 Vrms
RCVR13 ADF1 ADF RECEIVER 5.48 Vrms
RCVR14 ADF2 ADF RECEIVER 5.48 Vrms
SDTN1 COM1 SDTN RECEIVER SIDETONE 5.48 Vrms
SDTN2 COM2 SDTN RECEIVER SIDETONE 5.48 Vrms
SDTN3 COM3 SDTN RECEIVER SIDETONE 5.48 Vrms
SDTN4 COM4 SDTN RECEIVER SIDETONE 5.48 Vrms
SDTN5 COM5 SDTN RECEIVER SIDETONE 5.48 Vrms
SDTN6
(OPTION)
COM6 SDTN
(OPTION)
RECEIVER SIDETONE 5.48 Vrms
SDTN7 PA SDTN PA RECEIVER SIDETONE 3.88 Vrms
Source
Impedance
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
600 Ω
Table 1: Audio Input Signals –
Adjustable by Individual and General Volume Controls
Pin
Signal
Name
Name
AUX1 AUX1
Source
TAWS AURAL
Nominal
Level
2.5 Vrms
Source
Impedance
HDPH
Output Level
SPKR
Output Level
600 Ω 2.5 ±0.5 Vrms 2.5 ±0.5 Vrms
WARNING
AUX2 AUX2
HEADS UP AURAL
2.5 Vrms
600 Ω 2.5 ±0.5 Vrms 2.5 ±0.5 Vrms
WARNING
AUX3 AUX3 TCAS AURAL WARNING 2.0 Vrms
AUX4 AUX4
CHECK LIST AURAL
1.75 Vrms
600 Ω 2.5 ±0.5 Vrms 2.5 ±0.5 Vrms
600 Ω 2.5 ±0.5 Vrms 2.5 ±0.5 Vrms
WARNING
AUX5 AUX5
CHECK LIST AURAL
1.75 Vrms
600 Ω 2.5 ±0.5 Vrms 2.5 ±0.5 Vrms
WARNING
Table 2: Audio Input Signals –
Levels Not Adjustable by 3110-100 Controls
Page 1-6 Aug 25, 2005
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CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
SM3110 Rev. 4.00 3110-100 Audio Control Panel Manual
1.4.1.4 Bidirectional Signals
Service Interphone
: (SVC INPH I/O)
Type Differential, AC coupled, transformerless, short
Impedance 300 Ω
Dynamic Range 20 mVrms to 1.1Vrms, (1.55 V peak) into 300 Ω
Rated power 4.0 mW into 300 Ω (1.1 ±0.2 Vrms)
circuit protected
Flight Station (Cockpit) Interphone: (CKPT INPH I/O)
Type Differential, AC coupled, transformerless, short
circuit protected
Impedance 300 Ω
Dynamic Range 20 mVrms to 1.1 Vrms, (1.55 V peak) into 300 Ω
Rated power 4.0 mW into 300 Ω (1.1 ±0.2 Vrms)
OXY I/O DISCRETE Internally connected to OXY SWITCH input
Sink current 100 mA Max.
1.4.1.5 Audio Performance: (TSO-C50c RTCA DO-214 class 1b)
Audio Frequency Response
All outputs except CVR: ≤3 dB variation from 300 Hz - 6000 Hz
CVR output with boom/mask mic input and VOX on:
≤3 dB variation from 300 Hz - 4500 Hz
Spurious Responses ≤-50 dB from rated output
Distortion ≤10% @ rated power
≤3% @ 10% rated power
Input Impedance Within ±45° of zero phase
Output Impedance ≤2.5 times manufacturer’s specification
Volume Controls 39 ±5 dB range.
Output Regulation ≤10% Distortion when output load is changed
from 75% to 400% of rated load impedance
Output Power ≤3 dB variation for Interphone and Isolation
Amplifiers
≤7 dB variation for amplifiers whose rated
output impedance is equal to that of the rated
load impedances
Input-Output Crosstalk and Bleed-Through Levels
≤-55 dB
Input-Input Crosstalk ≤-60 dB
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