Wulfsberg Electronics Division CVC 151 User Manual
APPLICATION REVISIONS
D
REV
NEXT ASSEMBLY FINAL ASSEMBLY REV DESCRIPTION DATE APPROVED APPROVED
1
SH
A Initial Release per DCN W3749 6-18-04 V Wallace J Markham
B Revised per DCN W3905 12-23-04 V Wallace J Markham
C Revised per DCN W4435 4-30-04 V Wallace J Markham
D Revised per DCN W4917 12-21-05 V Wallace Bob Evans
150-047012
DWG. NO.
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF WULFSBERG ELECTRONICS, A
CHELTON GROUP COMPANY, NEITHER RECEIPT NOR POSSESSION THEREOF CONFERS ANY RIGHT
TO REPRODUCE OR USE, OR DISCLOSE, IN WHOLE OR IN PART, ANY SUCH INFORMATION WITHOUT
WRITTEN AUTHORIZATION FROM WULFSBERG ELECTRONICS
APPROVALS DATE
DRAWN
C Gregory
CHECKED
H Schnieder
ENGINEER
J Markham
ISSUED
V Wallace
Typed signatures indicate approval. Handwritten signature
approval of this document is on file at Wulfsberg Electronics,
Prescott, Arizona.
6-18-04
6-18-04
6-18-04
6-18-04
PILOT'S GUIDE, AVIONICS SYSTEMS,
FLITELINE ™
SIZE ACAGE CODE
1B7G3
SCALE: NONE DO NOT SCALE DRAWING
DWG NO.
150-047012
REV
D
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FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
Table of Contents
INTRODUCTION....................................................................................................................................................4
FLITELINE VHF COMMUNICATION SYSTEM (FLITECOMM)............................................................................5
GENERAL DESCRIPTION CVC-151..........................................................................................................................5
GENERAL DESCRIPTION CVC-152..........................................................................................................................5
CVC-152 DISPLAY (SERIES III AND FLITELINE INTERFACE – FAILURE INDICATION)..................................................12
OPERATING THE CVC-152...................................................................................................................................13
VHF COM SYSTEM BLOCK DIAGRAM (TYPICAL).................................................................................................... 16
FLITELINE VHF NAVIGATION SYSTEM (FLITENAV AND FLITEDME) ..........................................................17
GENERAL DESCRIPTION CVN-251........................................................................................................................17
GENERAL DESCRIPTION CDM-451.......................................................................................................................17
GENERAL DESCRIPTION CVN-252........................................................................................................................18
LIMITATIONS ........................................................................................................................................................18
CVN-252 CONTROLS (SERIES III AND FLITELINE INTERFACE)................................................................................20
CVN-252 CONTROLS (SERIES III AND FLITELINE INTERFACE - FAILURE INDICATION)...............................................24
CVN-252 CONTROLS (SERIES III AND FLITELINE INTERFACE - DME HOLD OPERATION) ......................................... 25
CVN-252 CONTROLS (ARINC 410 INTERFACE).................................................................................................... 26
CVN-252 CONTROLS (ARINC 410 INTERFACE - DME HOLD OPERATION).............................................................27
OPERATING THE CVN-252...................................................................................................................................28
GENERAL DESCRIPTION SD-442 ..........................................................................................................................30
VHF NAV SYSTEM BLOCK DIAGRAM (TYPICAL)..................................................................................................... 33
FLITELINE AUTOMATIC DIRECTION FINDER (ADF)......................................................................................34
GENERAL DESCRIPTION .......................................................................................................................................34
CDF-552 CONTROLS (SERIES III AND FLITELINE INTERFACE) ................................................................................36
CDF-552 CONTROLS (SERIES III AND FLITELINE INTERFACE – FAILURE INDICATION) ..............................................42
CDF-552 CONTROLS (BCD INTERFACE)...............................................................................................................43
OPERATING THE CDF-552...................................................................................................................................45
ADF SYSTEM BLOCK DIAGRAM (TYPICAL).............................................................................................................47
FLITELINE DUAL VHF COM AND VHF NAV CONTROL DISPLAY SYSTEM.................................................48
GENERAL DESCRIPTION .......................................................................................................................................48
LIMITATIONS ........................................................................................................................................................48
CCN-955 CONTROLS ..........................................................................................................................................49
CCN-955 CONTROLS ..........................................................................................................................................50
OPERATING THE CCN-955...................................................................................................................................51
Page 2 Publication No. 150-047012
Dec 2005 Rev. D
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
FLITELINE ATC TRANSPONDER SYSTEM (FLITEXPDR) ..............................................................................53
GENERAL DESCRIPTION CTR-352........................................................................................................................53
CTR-352 CONTROLS (ARINC-410 OCTAL INTERFACE)......................................................................................... 55
OPERATING THE CTR-352...................................................................................................................................60
ATC SYSTEM BLOCK DIAGRAM (TYPICAL).............................................................................................................62
FLITELOGIC EFIS TUNING FEATURES............................................................................................................63
GENERAL DESCRIPTION .......................................................................................................................................63
OPERATING THE CONTROL DISPLAYS WITH EFIS................................................................................................... 63
CONFIGURATION STATUS PAGE (ALL UNITS)..............................................................................................64
LIMITATIONS.......................................................................................................................................................66
Publication No. 150-047012 Page 3
Rev. D Dec 2005
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
Introduction
The FliteLine™ Avionics Systems represent the next generation of Chelton avionics. The
FliteLine Control Display units are subsystems of the Chelton Avionics FliteLine Systems.
The FliteLine NAV/COM/ADF/ATC Control Displays are one of several methods of controlling
the Chelton Avionics FliteLine remote-mounted avionics systems.
The FliteLine name builds from the reputation and heritage that Wulfsberg™ has enjoyed
with the Flitecomm™ and Flitefone® products. The new FliteLine products are the latest line
of Chelton's remote-mounted avionics. In addition to the Control Display units, the individual
systems within the FliteLine product line include: FliteCOMM™, FliteNAV™, FliteXPDR™,
and FliteDME™
Page 4 Publication No. 150-047012
Dec 2005 Rev. D
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
FliteLine VHF Communication System (FliteCOMM)
General Description CVC-151
The FliteLine CVC-151 is an all digital DSP VHF Comm Transceiver, built and designed to ARINC Air Transport
specifications. The Transceiver is designed to meet the latest ATC environment, all future CNS ATN
requirements, and has provisions for VDL Mode 2 and VDL Mode 3. The CVC-151 features a 20 watt solid-state
transmitter, is compliant with 25 kHz or 8.33 kHz spacing and the architecture is standard ARINC 429 which
supports interface to FMS systems and the Chelton RMS 555 Radio Management System. The CVC-151
Transceiver is interchangeable with current Series III VHF Comm Transceivers using a special mounting tray
adapter.
Features
8.33 kHz and/or 25 kHz Channel Spacing
FM Immunity
Continuous Transmit Capability (at reduced power)
Built-in SELCAL and ACARS Capability
New Color LCD Controller: CVC-152 single Com Control Display or Multi-function color Nav/Com
CCN-955 CD
Increased System Self-Test and BIT
ARINC 429 Digital Data Bus
118.000-136.975 MHz Standard Frequency Range
118.000 -151.975 MHz Extended Frequency Range Option
Weight and Volume Savings Compared to Series III VC-401B
Provisions for VDL Mode 2 and VDL Mode 3
General Description CVC-152
The Chelton CVC-152 Control Display Unit is available in versions for use with transceivers with fixed channel
spacing (25 kHz or 8.33 kHz), and for units with switchable (25 kHz and 8.33 kHz) channel spacing. The CVC152 is a direct replacement for the Chelton CD-402B and CD-402C Control Display Units.
The CVC-152 Control Display Unit provides a simultaneous readout of two frequencie s: The active frequency in
the upper display and, immediately below it, the standby frequency. Frequency switching is accomplished by
simply pressing a frequency transfer button. The Transmit Annunciator (Tx) appears in the display when RF is
present at the output of the transceiver, providing positive proof-of-operation. When the CVC-152 Control
Display Unit is turned on, a diagnosis of all critical circuits begins, and continues until the System is turned off. If
a fault is detected at any time, a FAIL annunciation appears in the display.
The CVC-152 Control Display Unit has a nonvolatile memory which allows it to remember the last frequencies
displayed, indefinitely, even when power is removed. This feature prevents momentary power interrupts from
affecting the system, and allows the last frequencies used to appear immediately when the System is turned on.
Publication No. 150-047012 Page 5
Rev. D Dec 2005
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
The CVC-152 Communication Control Display Unit is designed to interface with Chelton FliteLine
Communications Radios (CVC-151), Chelton Series III Communications Radios (VC-401B and VC-401C in the
VCS 40 Systems), and Collins Communication Radios with the ARINC 410 (2x5) Interfaces.
Page 6 Publication No. 150-047012
Dec 2005 Rev. D
CVC-152 Control Display Unit
"Active" COM Annunciator
COM System Number
COM Transmit Annunciator
Standby COM Frequency
Mode Select (Outer Knob)
Volume Control (Inner Knob)
CHEL TON
Power On/OFF (pushbutton)
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
COM
ACT
124.950
1 2
TX
124.950
25k TST8.33k
MODE
VOL
PWR
Switchable Channel Spacing
TUNE
Active COM Frequency
Volume Annunciator
Mode Annunciators
1MHz Frequency Tuning
(Outer Knob)
25kHz and 8.33 kHz
Frequency Tuning (Inner
Knob)
Active/Standby Transfer
(pushbutton)
Publication No. 150-047012 Page 7
Rev. D Dec 2005
CVC-152 Control Display Unit
"Active" COM Annunciator
COM System N um ber
COM Transm it Annunciator
Standby COM Frequency
Mode Select (Outer Knob)
Volume Control (Inner Knob)
Power On/OFF (pushbutton)
FLITELINE AVIONICS SYSTEM
CHELT O N
ACT
1 2
TX
MODE
VOL
PWR
PILOT’S GUIDE
COM
124.950
124.950
ON TST
TUNE
Active COM Frequency
Volume Annunciator
Mode Annunciators
1MHz Frequency Tuning
(Outer Knob)
25kHz Frequency Tuning
(Inner Knob)
Active/Standby Transfer
(pushbutton)
Fixed Channel Spacing
Page 8 Publication No. 150-047012
Dec 2005 Rev. D
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
CVC-152 Controls (Series III, FliteLine, ARINC 410 Interfaces)
CHELTON
Outer Knob
CHELTON
ACT
MODE
VOL
PWR
COM
124.950
1
124.950
25k TST8.33k
COM
TUNE
Mode Selector
Switchable Channel Spacing
25k - Selects 25 kHz channel spacing.
8.33k - Selects 8.33 kHz channel spacing.
TST - Disables the squelch circuits to allow audible
verification of receiver operation.
*Note: There is no ON mode when 25kHz and
8.33kHz capable Radios are detected.
Mode Selector
Fixed Channel Spacing
Outer Knob
ACT
MODE
VOL
PWR
124.950
1
124.950
ON TST
TUNE
On – Standard position allows 25kHz channel
tuning operation
TST - Disables the squelch circuits to allow audible
verification of receiver operation.
*Note: Fixed Channel Spacing is the only mode
ARINC 410 Interface installations will have.
Publication No. 150-047012 Page 9
Rev. D Dec 2005
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
CVC-152 Controls (Series III, FliteLine, and ARINC 410 Interfaces Continued…)
CHELTON
ACT
1
MODE
VOL
PWR
COM
124.950
124.950
25k TST8.33k
TUNE
Frequency Knobs
The right outer knob tunes the transmit/receive
frequency in whole MHz steps (118, 119, 120,
etc.). The right inner knob tunes in 25 or 8.33
kHz steps (refer to the table on page 10).
Frequency Transfer Button
The right inner knob also functions as a
pushbutton for switching the active and
standby frequency.
Press and release to exchange active and
standby frequencies. Press and hold 2
seconds to remove the standby frequency so
that the active frequency can be changed
directly with the frequency knobs. Press and
hold 2 seconds again to restore the standby
frequency.
Press and hold for 7 seconds or longer to set
the active frequency to 121.50 MHz, and put
the radio into the active tuning mode.
CHELTON
Inner Knob
ACT
MODE
VOL
PWR
COM
124.950
1
124.950
25k TST8.33k
Volume Control (Optional) - Inner knob
controls the receiver audio volume. Volume
Level Annunciator appears only when volume
is being adjusted and is removed from display
two seconds following adjustment.
TUNE
Page 10 Publication No. 150-047012
Dec 2005 Rev. D
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
CVC-152 Controls (Series III, FliteLine, and ARINC 410 Interfaces Continued…)
Active Frequency
ACT
124.950
1
The upper line of the display always shows
the active frequency
…
25k TST8.33k
ACT
124.950
1
124.950
25k TST8.33k
ACT
124.950
1
124.950
25k TST8.33k
ACT
124.950
1
Active Annunciator
…which is indicated by the Active
Annunciator (the letters ACT).
Standby Frequency
The lower line of the display shows the
standby frequency.
When both frequencies are shown, rotating
the FREQUENCY KNOBS changes the
standby frequency.
Transmit Annunciator
The Transmit Annunciator (the letters Tx)
indicates an RF output of the transmitter. It
appears when the microphone is keyed.
TX
124.950
25k TST8.33k
Publication No. 150-047012 Page 11
Rev. D Dec 2005
*Note:Tx Indicator not present on units
configured for ARINC 410 interface
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
CVC-152 Controls (Series III, FliteLine, and ARINC 410 Interfaces Continued…)
System Number
ACT
124.950
1
TX
124.950
25k TST8.33k
The System Number indicates that this
display is for COM System 2 (when more
than one system is installed). The number
1 indicates that this display is for COM
System 1 (when more than one system is
installed).
If only one COM System is installed or if
this Control Display Unit controls COM 3 in
a three-radio system, the display shows a
blank instead of 1 or 2.
CVC-152 Display (Series III and FliteLine Interface – Failure Indication)
ACT
124.950
1
FAIL 1
25k TST8.33k
ACT
124.950
1
FAIL 2
25k TST8.33k
* Series III Interface (FliteLine Radio
installations may display these pages
when configured as Series III)
FAIL 1 in the lower line of the display
indicates a System failure. Neither
transmitter nor receiver is operative.
* Series III Interface (FliteLine Radio
installations may display these pages
when configured as Series III)
FAIL 2 in the lower line of the display
indicates a Transmitter only failure. This is
displayed only when the microphone is
keyed. The receiver is still operative
unless FAIL 1 is displayed with the
microphone not keyed.
Page 12 Publication No. 150-047012
Dec 2005 Rev. D
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
Operating the CVC-152
1. Turn the MODE SELECTOR to ON (fixed channel spacing) or to 25kHz or 8.33kHz (switchable channel
spacing). The last frequencies selected prior to System turnoff reappear in the display.
2. If these are not the desired frequencies, rotate the appropriate FREQUENCY KNOB until the desired
frequency is displayed as the standby frequency in the lower line of the display.
The large frequency knob increments (clockwise rotation) or decrements (counter-clockwise rotation) the
frequency being tuned by one megahertz for each detent.
The small frequency knob increments (clockwise rotation) or decrements (counter-clockwise rotation) the
frequency being tuned by 25 kHz or 8.33 kHz for each detent.
For 8.33 kHz channel spacing, the small frequency knob sequences through a list of both 25 kHz and 8.33
kHz channels (see table below).
Frequency (MHz) Channel Spacing (kHz) Channel Name
118.0000 25 118.000
118.0000 8.33 118.005
118.0083 8.33 118.010
118.0167 8.33 118.015
118.0250 25 118.025
118.0250 8.33 118.030
118.0333 8.33 118.035
118.0417 8.33 118.040
118.0500 25 118.050
118.0500 8.33 118.055
118.0583 8.33 118.060
118.0667 8.33 118.065
118.0750 25 118.075
118.0750 8.33 118.080
118.0833 8.33 118.085
118.0917 8.33 118.090
118.1000 25 118.100
.
.
.
136.9750 25 136.975
136.9750 8.33 136.980
136.9833 8.33 136.985
136.9917 8.33 136.990
.
.
(as displayed on screen)
Publication No. 150-047012 Page 13
Rev. D Dec 2005
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
3. Press and release the FREQUENCY TRANSFER button. This exchanges the two displayed frequencies.
The desired frequency is now active and may be used immediately.
4. Use the VOLUME CONTROL to adjust volume if a station is broadcasting.
5. To set a new standby frequency, rotate the appropriate FREQUENCY KNOB until the desired frequency is
displayed in the lower line of the display.
NOTE: To tune the active frequency only (without first tuning the standby and then "flipping" the
frequencies), press and hold the FREQUENCY TRANSFER button for two seconds, then release
it. This removes the standby frequency from the display.
The FREQUENCY KNOBS may now be used to change the active frequency.
Press and hold the FREQUENCY TRANSFER button for two seconds again to restore the
standby frequency to the display, if desired.
Page 14 Publication No. 150-047012
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FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
CVC-152 Notes
1. The FREQUENCY SELECTOR knobs tune the radio transceiver directly. The display shows the
frequencies to which the radio transceiver is actually tuned. In addition to the CVC-152, the Chelton
Series III transceivers may also be tuned by an ARINC 429 digital bus. In addition to the CVC-152, the
Chelton FliteLine transceivers may be tuned by either ARINC 429 digital bus or Controller Area Network
(CAN) Bus.
2. Display intensity and panel lighting are controlled by external dimmer controls.
3. Pressing and holding the FREQUENCY TRANSFER button for at least 7 seconds before releasing it
sets the COM active frequency to 121.50 MHz and puts the unit into the active tuning mode. This is true
even if segments of the display are faulty or a lighting failure occurs. From this known reference point,
any other frequency may be set by counting detents of the FREQUENCY SELECTOR knobs as they
are rotated. Each clockwise detent of the outer knob is one Megahertz difference. Each clockwise
detent of the inner knob is 25kHz or 8.33 kHz difference.
4. The FREQUENCY SELECTOR knobs rotate continuously through all detents without end stops. After
rotating the outer knob clockwise to the highest number, the next detent will be the lowest number (118
MHz).
5. Pressing and holding the left pushbutton (PWR) for more than 1 second will trigger the system to
shutdown. A warning screen will display a countdown. Releasing the PWR button before the count has
expired will return the unit to the display screen active prior to initiating the shutdown.
Should the system become unresponsive, a hardware failsafe shutdown can be initiated. Under this
circumstance, press and hold the PWR button for 12-15 seconds. There is no indication other than
actual system shutdown and an audible click.
6. The system that is in the off condition may be turned on by simply pressing the PWR button
momentarily.
7. Systems configured for ARINC 410 (2x5) Digital Interface will only support fixed channel operation.
There is no TX indicator on a system configured for ARINC 410 interface.
Publication No. 150-047012 Page 15
Rev. D Dec 2005
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
VHF COM System Block Diagram (Typical)
VHF Antenna
Panel Dimmer Control
VHF Communications
Tranceiver
Audio
FrequencySelect
Tuning Data*
ARINC 429
Microphone
and PTT
Sidetone
Function Select
Radio
Management
System
Audio
Audio Panel
CVC-152
Audio
Display Dimmer Control
* Control Displays configured for ARINC 410
typically do not have tuning data returned from
the radio
Page 16 Publication No. 150-047012
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FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
FliteLine VHF Navigation System (FliteNAV and FliteDME)
General Description CVN-251
The FliteLine CVN-251 is an all digital DSP Navigation System which combines VOR/LOC, Glideslope and
Marker Beacon functions. This Receiver configuration supports the total navigation interface requirements for
MFD or moving map displays. The ARINC 429 digital data bus offers compatibility with EFIS/LCD displays, the
Chelton RMS-555 Radio Management and Flight Management Systems by supporting Nav auto-tune operation.
Additional interfaces are provided to HSI’s, CDI’s and RMI’s to include analog. Automatic calibration of the VOR
converter ensures navigation guidance accuracy. The CVN-251 is interchangeable with Series III VHF Nav
Receivers using a special mounting tray adapter.
Features
Includes Glideslope and Marker Beacon
Digital VOR/LOC and Glideslope Converters
FM Immunity
Analog Outputs to CDI’s and HSI’s
Digital Redial/bearing Output
ARINC 429 Digital Data Bus
Increased Self-test and BIT
Optional Stand Alone Color Control Head (CVN-252)
Or Color Multi-function (CCN-955) Nav/Com
Special Rotor Modulation Protection
Weight and Volume Savings Compared to Series III VN-411B
General Description CDM-451
The CDM-451 is an all digital DME. The triple channel scanning DME provides ARINC 429 outputs along with
analog outputs for two displays or EFIS MFD’s. The CDM-451 Transceiver is compatible with FMS Systems to
include auto-tune operation. The third output channel can also provide single DME output to the FMS for
independent navigation solution. The Receiver can be tuned via ARINC 429 bus via the CVN-251 or Series III
NAV Radio using individual CVN-252 Nav Control Displays, the Chelton Series III RMS 555 Radio Management
System, or with Flight Management Systems. The CDM-451 is interchangeable with the current Series III DME
using a special mounting tray adapter. DME data may be optionally displayed with the SD-442 display
controller.
Features
Publication No. 150-047012 Page 17
Rev. D Dec 2005
Simultaneous Scanning of Three Ground Stations
325 Watt Transmitter
Continuous Self-test
ARINC429 Digital Data Bus Interface
Analog Outputs
Volume and Weight Savings Compared to Series III DM-441B
FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
General Description CVN-252
The Chelton CVN-252 VHF Navigation Control Display is designed to control VHF navigation receiving systems
that combine VOR/LOC, glideslope, and marker beacon reception. The CVN-252 is a direct replacement for the
Chelton CD-412B Control Display Unit.
The CVN-252 Control Display can digitally display BEARING TO or RADIAL FROM any selected VOR station.
When an ILS frequency is selected by the Series III or FliteLine Navigation radio, the letters LOC appear below
the frequency on the display when RAD or BRG are selected.
The CVC-252 Control Display incorporates microprocessor technology to achieve performance, reliability,
accuracy, and features not possible in previous systems. These include advanced filtering techniques, full-time
self-diagnostics, non-volatile frequency memory.
Special filtering circuits virtually eliminate noise, including rotor modulation noise in helicopter installations.
Self-testing begins when the system is turned on, and continues until turnoff. Faults detected result in a FAIL
annunciation.
Non-volatile memory means that the last frequency selected is in system memory if the system is turned off, if
power is interrupted, or even if the system is removed from the aircraft.
The CVN-252 Navigation Control Display Unit is designed to interface with Chelton FliteLine Navigatio n Radios
(CVN-251), Chelton Series III Navigation Radios (VN-411B in the VNS 41 System), and Collins Navigation
Radios with the ARINC 410 (2x5) Interfaces.
Limitations
NOTE: Installations of the CVN-252, and CCN-955 with the Series III or ARINC-410 digital interfaces which
include the optional DME Hold functionality are subject to certain limitations. In these installations, the aircraft
shall provide indication of the DME Hold status on equipment other than the FliteLine Control Display and within
the pilot's primary field of view.
Failure to meet these limitation guidelines violates the installation guidance set forth in this manual and may
lead to an unsafe aircraft operating condition.
Page 18 Publication No. 150-047012
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CVN-252 NAV Control Display
"Active" NAV Annunciator
FLITELINE AVIONICS SYSTEM
CHELTON
PILOT’S GUIDE
NAV
Active NAV Frequency
NAV System Number
Standby NAV Frequency,
Bearing, and Radial
Mode Select (Outer Knob)
Volume Control (Inner Knob)
Power On/OFF (pushbutton)
ACT
1 2
MODE
VOL
PWR
110.20
108.15
ON BRGRAD
TUNE
Volume Annunciator
Mode Annunciators
1MHz Frequency
Tuning (Outer Knob)
50kHz Frequency
Tuning (Inner Knob)
Active/Standby
Transfer(pushbutton)
DME Hold (pushbutton)
Publication No. 150-047012 Page 19
Rev. D Dec 2005
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