Becker | IN3300 | Instructions | Becker NR3320 Navigation Receiver Instructions

Becker NR3320 Navigation Receiver Instructions
OPERATING INSTRUCTIONS
Navigation-Receiver
NR 3320 - (01) / - (02)
NR 3330 - ( 01) / - (02)
BECKER FLUGFUNKWERK GMBH
Baden Airpark B 108
D-77836 Rheinmünster (Germany)
Tel.
+49 (0) 7229 / 305-0
Telex 781 271 beflu
Fax
+49 (0) 7229 / 305217
Subject to technical changes
Failure description
Becker Flugfunkwerk GmbH
Baden Airpark, Gebäude B 108
77836 Rheinmünster (Germany)
Tel.
+49 (0) 7229 / 305-0
Fax
+49 (0) 7229 / 305-217
Unit type :
Serial number :
Aircraft type :
Brief description of the failure :
.................................................................................................................
.................................................................................................................
.................................................................................................................
.................................................................................................................
Should the fault only occur sporadically, please answer the following
questions :
The fault occurs after . . . . . minutes of operation.
The fault occurs under the following environmental conditions :
p low temperature
p high temperature
p high humidity
p vibration
The fault is engine speed-dependent and occurs above/below . . . . . rpm.
Should any problems arise, I may be contacted under the following adress :
...................................................................................
I am available between 8 a.m.
..................................................................
and 4 p.m. under the following
..................................................................
telephone number :
.............................................................. office: ...................................
.............................................................. private : ...................................
© Copyright by Becker Flugfunkwerk
Article-No.: 0516.718-071
Issue 12/97
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
REPAIR INSTRUCTIONS
TABLE OF CONTENTS
If an equipment fault the unit may be sent to a Becker Dealer or the Becker Product Support together with a description of the fault. The completed fault description shortens the repair times and hence lowers the
resultant costs.
Page
These operating instructions do not replace the equipment manuals listed below.
IMPORTANT
INTRODUCTION
SAFETY PRECAUTIONS
GENERAL INFORMATION
p Short description of NAV receiver
1
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5
5
q Equipment manuals
CONTROL AND INDICATORS
p NAV receiver
9
9
To be purchased from the manufacturer or Becker Dealer:
OPERATING INSTRUCTIONS
13
Installation and Operation
DV 38001.03
Article-No.: 0504.971-071
Maintenance and Repair
DV 38001.04
Article-No.: 0504.981-071
Operating Instructions
Article-No.: 0516.718-071
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Issue 12/97
Operating instructions NAV receiver
Switching on the navigation receiver
TEST mode (by pressing the TEST button)
VOR mode
Monitoring flight and weather information
LOC mode
GS mode with the NR 3320 - ( )
Operation of the various modes
Frequency setting mode
Frequency preselection mode
Channel setting mode
Storage procedure
Service mode (equipment configurations)
Deletion of all stored frequencies in the storage channels
Issue 12/97
Page 1
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
Page
TECHNICAL DATA
25
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26
27
28
29
General data
VOR/LOC receiver
VOR/LOC system functions
GS receiver and functions in the NR 3320 - ( )
Indicators
Centering error under all
conditions, listed in RTCA DO-192
with 95% probability
£ 13% of standard deflection
GS needle output
max. of 3 needles and/or flags
with 1 kW each
GS warning flag output
max. of 3 needles and/or flags
with 1 kW each
REPAIR INSTRUCTIONS
30
q Indicators
p Equipment manuals
30
VOR/LOC indicator (singlepointer)
for NR 3330 - (01)
IN 3300 - (4) / - (9) or
equivalent indicator
VOR/LOC indicator (crosspointer)
for NR 3320 - (01)
IN 3300 - (3) / - (5) - (8) or
equivalent indicator
Compatible indicators may also be used if they meet relevant requirements. They must have equivalent or better environmental performance characteristics as the indicators listed above with respect to temperature, altitude, humidity and vibration.
Page 2
Issue 12/97
Issue 12/97
Page 31
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
Resolver output
standard as per ARINC 407
VOR/LOC needle output
max. of 3 pointers and/or flags
with 1 kW each
VOR/LOC warning flag output
max. of 3 pointers and/or flags
with 1 kW each
TO/FROM output
max. of 3 pointers and/or flags
with 1 kW each
INTRODUCTION
for VOR course tracking and
ILS mode
Thank you for purchasing the BECKER NAV receiver. The NAV receiver can be installed in the instrument panel or centre console or operating console and is easy to operate. The technology used is to the state
of the art.
Autopilot output
q GS receiver and functions in the NR 3320 - (01) / - ( 02)
Receiver type
single-conversion superheterodyne receiver
Frequency range
329.15 MHz . . . 335.00 MHz
No. of channels
40
Channel spacing
150 kHz
Sensitivity
£ -80dBm for complete
disappearance of warning flag
Bandwidth
³ ± 20 kHz at 6 dB
Selectivity
³ 42 dB at DF ³ 150 kHz
Page 30
Issue 12/97
IMPORTANT
Carefully read these operating instructions right through before attempting to operate the NAV receiver.
Keep these operating instructions carefully. They contain important safety and operating instructions for the NAV receiver.
To fully utilise the capabilities of your NAV receiver, please carefully
read these operating instructions right through before you start operating the set.
If you have any questions regarding the operation of the NAV receiver, please get in touch with your nearest Becker Dealer or with the Becker Product Support.
Issue 12/97
Page 3
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
The WARNING, CAUTION and NOTE highlights have the following
meanings:
WARNING
Failure to comply, or incorrect compliance,
with these instructions or procedures can lead
to injuries or fatal accidents.
CAUTION
Failure to comply, or incorrect compliance,
with these instructions or procedures can lead
to damage to equipment.
NOTE
Feature to which attention should be drawn.
CAUTION
l
l
l
l
£ 3 dB from -87 dBm . . . -10
Distortion
£ 10%
Audio output
150 mW into 300W symm.
NAV signal (composite)
500 mV at 30 Hz, mod = 30%
VOICE filter
³ 20 dB reduction
DME remote control
parallel, with 2-out-of-5 code
in accordance with ARINC 410
q VOR/LOC system functions
Never connect the NAV receiver to alternating current voltage or
to voltage sources exceeding 32 V DC.
Never connect the NAV receiver with reversed polarity to a voltage source.
The installation of the NAV receiver in ambient temperatures below - 55°C or above + 85°C is to be avoided.
Switch off the unit when starting or shutting down engines.
Page 4
AGC
dBm
Issue 12/97
Sensitivity
£ -93 dBm for full direction
sensitivity
Bearing error under normal
condition
£ ± 2°
Bearing error under all
conditions listed in
RTCA DO-196, with 95%
probability
£ ± 2.7°
Course deviation for full
scale deflection
± 10°
LOC centering error under all
conditions, listed in RTCA DO-195
with 95% probability
£ 11% of standard dflection
Issue 12/97
Page 29
BECKER NR 3320 - ( ) / NR 3330 - ( )
Max. operating altitude
Operating Instructions
50 000 ft.
SAFETY PRECAUTIONS
l
Dimensions
Front panel
47.5 x 146 mm
l
Casing depth
183 mm with antenna jack
l
Weight of
NR 3320 - (01)
NR 3320 - (02)
NR 3330 - (01)
NR 3330 - (02)
approx. 0,885 kg
approx. 0,835 kg
approx. 0,745 kg
approx. 0,695 kg
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q VOR/LOC receiver
l
Receiver type
triple-conversion
superheterodyne receiver
Frequency range
108.00 MHz - 117.95 MHz
No. of channels
200
Channel spacing
50 kHz
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IF-Frequencies 1,2,3
71.05 MHz, 21.4 Mhz,
455 kHz
Sensitivity (audio)
£ -93 dBm for ³ 6 dB SINAD
Bandwidth
³ 12 kHz at 6 dB
Selectivity
³ 65 dB at DF ³ ± 50 kHz
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Page 28
Issue 12/97
Switch off the navigation receiver before starting or shutting
down engines !
The NAV system should be connected to the aircraft power supply by its own 1 A circuit breaker.
Warning! Reception is only possible when there is a quasi-optical
sight to the VOR station.
When the warning flag in the display unit appears, the course deviation needle must then not be used in the continuing flight !
Warning! When flying with the autopilot locked on to VOR, the
OBS must not be rotated because any change in the off-course
needle is followed by the autopilot !
If the off-course needle instrument fails, no warning flag appears.
Check the off-course needle by activating the TEST function. The
course deviation needle must deflect halfway. Important to check
before approach to landing !
During approaches on the back beam, a needle deflection no
longer corresponds to a command indication. In this special
case, course corrections must be made opposite to the needle
deflection !
When overflying VOR stations a cone of silence of ± 45°occurs
in which the warning flag appears and the course deviation needle stays in the mid position.
When flying over mountains the course deviation needle may
deviate about the mid position (reflections) when approaching or
leaving VOR stations. Doppler VOR stations produce substantially more stable indications under these conditions.
Issue 12/97
Page 5
BECKER NR 3320 - ( ) / NR 3330 - ( )
l
Operating Instructions
EMC note: If the antennas of transmitting equipment and of the
navigation receiver are not sufficiently decoupled, it is possible
that the warning flag may appear during transmission or the course deviation needle may deflect. Inadequate decoupling is possible with airframes made of wood or synthetic materials or where
the antennas are mounted close together.
Page 6
Issue 12/97
TECHNICAL DATA
q General data
Supply voltage
+ 13.75 V or + 27.5 V DC
Current consumption of
NR 3320 - (01)
typ. 340 mA
(without panel illumination)
Current consumption of
NR 3320 - (02)
typ. 300 mA
(without panel illumination)
Current consumption of
NR 3330 - (01)
typ. 280 mA
(without panel illumination)
Current consumption of
NR 3330 - (02)
typ. 240 mA
(without panel illumination)
Current consumption of
panel illumination
typ. 230 mA at 27.5 V
typ. 460 mA at 13.75 V
typ. 1.4 A at 5 V
Overcurrent capacity of
internal fusing
1,5 A
Recommended external
overcurrent protection
1 A without panel illumination
Operating temperature range
- 20°C ... + 55°C
(short-time to + 70°C)
Storage temperature range
- 55°C ... + 85°C
Interface
RS 422
Issue 12/97
Page 27
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
Release the volume control
GENERAL INFORMATIONS
Call up function “Poti” using the MDE key. The following display appears:
left LC-Display
right LC-Display
Poti
ON or OFF
Select the required setting using the kHz frequency selector switch and
store the selection by pressing the STO key.
OFF =
ON =
The audio output signal is off and can not be
adjusted with the volume control.
The audio output signal can be adjusted with the
volume control (standard setting).
Ending of the service mode
The navigation receiver must be switched off to finish end the service
mode.
The NAV receiver NR 3320 - (01) is designed to receive and convert
VOR and LOC signals on 200 channels in the frequency range between
108.00 MHz and 117.95 MHz.
The NAV receiver NR 3320 - (02) is designed to receive VOR and LOC
signals on 200 channels in the frequency range between 108.00 MHz
and 117.95 MHz. It supplies the NAV composite signal to an external
VOR/LOC converter. Both NAV receiver include a glideslope receiver.
The glideslope receiver is designed to receive and convert GS signals
on 40 channels in the frequency range between 329.15 MHz and
335.00 MHz.
The NAV receiver NR 3330 - (01) is designed to receive and convert
VOR and LOC signals on 200 channels in the frequency range between
108.00 MHz and 117.95 MHz.
The NAV receiver NR 3330 - (02) is designed to receive VOR and LOC
signals on 200 channels in the frequency range between 108.00 MHz
and 117.95 MHz. It supplies the NAV-composite signal to an external
VOR/LOC converter.
q Deletion of all stored frequencies in the storage channels
Press and hold the STO and MDE keys whilst switching on the navigation receiver. All the stored frequencies in the storage channels are deleted, with the exception of channel 01.
Page 26
Issue 12/97
q Short description of NAV receiver
The NAV receiver is designed as a single unit for installation in the instrument panel or operating console of aircraft. Its dimensions correspond to the ARINC standard dimensions for control equipment. It is
held in place by four DZUS fasteners. All controls and indicators are located on the front panel.
Issue 12/97
Page 7
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
The back side of the unit contains:
Entry of password to interlock the equipment configuration
Call up the “COdE” function using the MDE key. The following display
appears:
·
the BNC-antenna jacks for the VOR/LOC-receiver
·
the TNC-antenna jacks for the GS-receiver
·
the 15-pole D-sub connector plug (female) for the outputs of the
VOR/LOC converter board (NR 3320 - ( 01) and NR 3330 -(01)
only)
·
the 9-pole D-sub connector plug (female) for the I/O Outputs of
the RS 422 interface.
·
the 25-pole D-sub connector plug (male) unit connector plug
The electronic elements of the unit are distributed among the following
boards, which are linked with one another by means of p.c. connectors:
1. Chassis board
2. VOR/LOC receiver board
3. VOR/LOC converter board
4. GS receiver board
5. Processor board
left LC-Display
right LC-Display
COdE
0000
Set any 4-digit numerical code. Using the MHz frequency selector
switch, select the character (two digit left) and kHz frequency selector
switch, select the character (two digit right) . Store the numerical code
by pressing the STO key.
NOTE
As soon as a password is given a “0000" appears in the right
LC-Display when the service mode is called up. The numerical code must then be input using the MHz and kHz frequency selector switch and press the STO key. If the navigation
receiver detects a false numerical code, it automatically switches to the last mode. If the password is to be erased or changed, this is done by calling up the service mode using the old
password. The COdE function is then chosen and either a
”0000" is entered everywhere or the changed numerical code
is entered.
6. Display board
7. Interface board
The interface board and the processor board are mounted and fastened
by means of four screws on the frame of the control head. The display
board with the two liquid crystal displays is located between the front
plate and the panel.
Page 8
Issue 12/97
Issue 12/97
Page 25
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
Release the frequency storage
The microcontroller as well as its storage and peripheral components
are located on the processor board.
Call up function “CS” using the MDE key. The following display appears:
left LC-Display
right LC-Display
CS
ON or OFF
Select the required setting using the kHz frequency selector switch and
store the selection by pressing the STO key.
OFF =
ON =
The storage of frequencies in the individual channels is not possible.
Storage of frequencies in the individual channels
is
The GS receiver board is above the chassis board; and the VOR/LOC
receiver board and the VOR/LOC converter board are mounted below
the chassis board. Each of these three circuit boards is attached to the
chassis with four screws.
The VOR/LOC receiver is a triple-conversion superheterodyne receiver
and operates in the frequency range from 108.00 MHz to 117.95 MHz
with a channel separation of 50 kHz. The injection signal for the mixer is
generated by a voltage-controlled oscillator (VCO). The VCO is controlled by digital frequency synthesizer which is mounted on the chassis
board. Digital frequency synthesis and storage are microprocessor-controlled.
possible (standard setting).
The VOR/LOC conversion takes place on the VOR/LOC converter
board. The converted signals can then be read off the VOR/LOC pointer
of the connected VOR/ILS indicator.
Erase stored frequencies
Call up function “dEL” using the MDE key. The following display appears:
left LC-Display
right LC-Display
dEL
CH channel number
Select the channel to be erased using the kHz frequency selector switch
(steps of 1) or MHz frequency selector switch (steps of 10) switch. The
stored frequency is erased by pressing the STO key. The channel
No. 1 cannot be erased.
“ch” = free channel
“CH” = occupied channel (can be overwritten).
Page 24
Issue 12/97
The VOR/LOC converter board is omitted in the NR 3320 - (02) and
NR 3330 - (02) type. This type supplies only the NAV composite signal
to the VOR/LOC evaluation (for indicators with integrated VOR/LOC
evaluation).
The GS receiver is designed as a single-conversion superheterodyne
receiver and operates in the frequency range between 329.15 MHz and
335.00 MHz with a channel separation of 150 kHz. The injection frequency for the receiver is generated by a voltage-controlled oscillator
(VCO). The VCO is controlled by a digital frequency synthesizer which
is mounted on the chassis board. The digital frequency synthesizer operates in conjunction with the microcontroller of the NAV receiver. The
converted GS signals can be read off the GS pointer of the connected
indicator.
Issue 12/97
Page 9
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
The NAV receiver contains two liquid crystal frequency displays, on
which two different frequencies can be set using the tuning dials. The
microcontroller allows programming of an “active” and a “preset” frequency which can be quickly swapped during VOR/LOC operation by
pressing the transfer button.
On the right two digits display the version number and on the left
two digits display the software Spec..
“Fr” appears in the left indication and OFF or ON in the right indication
after display the version number and software Spec..
NOTE
The NAV receiver possesses a built-in testing function. By pressing the
TEST button it is possible to check the proper functioning of both liquid
crystal displays, the VOR/LOC converter and the GS converter.
The tuning dials of the NAV receiver can also be used to remotely control a DME unit (parallel with 2-out-of-5 code).
In the service mode, the navigation receiver is not ready
for operation
The parameters are selected in stages in the service mode by pressing
the MDE key.
Release the frequency setting (channel selection only)
Call up function “Fr” using the MDE key. The following display appears:
left LC-Display
right LC-Display
Fr
ON or OFF
Select the required setting, using the kHz frequency selector switch and
store the setting by pressing the STO key.
OFF =
ON =
Page 10
Issue 12/97
Issue 12/97
Frequency setting not possible. The navigation
receiver can only work on the frequencies stored
in the individual channels.
Frequency setting possible (standard setting).
Page 23
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
2. Press the STO key. The next free channel is shown flashing “ch”.
The channel in which the frequency is to be entered is selected
using the MHz and kHz frequency switches. Channels which are
already occupied are indicated by “CH” and can be overwritten.
CONTROLS AND INDICATORS
q NAV receiver
3. Press the STO key. The frequency is stored in the selected channel and the storage procedure ended.
NOTE
If no input (action) takes place for more than 7 seconds during the storage procedure, the operation is automatically aborted off. A storage operation can be aborted off at any time
by pressing the MDE key.
Meaning of symbols on controls and indicators
q Service mode (equipment configurations)
The service mode is meant to enable the ground technicians to set
the equipment configuration and must not be used in flight.
1
The following settings can be changed or set:
Fr
CS
dEL
COdE
Poti
Inhibiting the frequency setting
(channel selection only (ON/OFF)
Inhibiting the frequency storage (ON/OFF)
Erasure of stored frequencies
Entering a password to interlock the
equipment configuration
ReIease the volume control (ON/OFF)
Switch off the navigation receiver. Press and hold the MDE key whilst
the navigation receiver is being switched on. The right display must
show the version number and software Spec. approximately 2 seconds.
Page 22
Symbol
Issue 12/97
2
TEST
Description
Function
ON/OFF switch
combined with
volume control
ON/OFF switch and volume
control.
TEST key
3
IDT
IDT key
4
STO
STO key
Issue 12/97
Tests functional status of
both LCDs, the VOR/LOC- /
GS-converter and the indicator.
Switching the suppression
of the VOR identification on
or off when monitoring flight
and weather information.
Storage of set frequency or
other settings.
Page 11
BECKER NR 3320 - ( ) / NR 3330 - ( )
Description
Function
q Channel setting mode
MDE
Function key
Selection of mode and selecting the parameter in the
service mode.
Select the channel setting mode using the MDE key. The last indicated
storage channel appears in the right display and the stored frequency is
shown in the left display. The navigation receiver is ready to receive on
this frequency.
<->
Exchange key
Symbol
5
6
7
8
Operating Instructions
Frequency selector
Frequency selector
Frequency preselection:
Exchange
of
preset
fre-quency and active frequency.
Switching the indicated
switch frequency in 1 MHz
(outer rotary switch) steps or
the storage channel upwards or downwards in
steps of 10.
Switches the indicated (inner rotary switch) frequency
in 50 kHz steps or the storage channel by 1 step in each
case
upwards
or
downwards, without carry
over.
Select the require channel using the kHz frequency selector switch
(single steps) or MHz frequency selector switch (steps of ten).
NOTE
Only occupied storage channels can be selected.
Change of mode
To change the mode, press the MDE key.
q Storage procedure
A storage procedure can be performed at any time and is activated by
pressing the STO key.
1. Press the STO key. The active frequency remains indicated in the
left display. The navigation system is ready to receive on this frequency. The active frequency is shown flashing in the right display
and in the frequency preselection mode, the preset frequency. Set
the required frequency using the kHz frequency selector switch
and the MHz frequency selector switch.
Page 12
Issue 12/97
Issue 12/97
Page 21
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
Change of mode
To change the mode, press the MDE key.
LCD (liquid crystal display) elements
Symbol
q Frequency preselection mode
Select the mode using the MDE key. The last indicated active and preset frequency are shown in the left and right indication respectively.
9
1
0
The preset frequency (right indication) is set using the MHz and kHz frequency selector switches. Pressing the <-> exchange key changes over
between the active and preset frequency.
NOTE
The navigation receiver is always ready to receive on the frequency shown in the left indication.
Change of mode
To change the mode, press the MDE key.
Description
Function
(left indication)
(active frequency)
Indication of active
reception frequency.
(right indication)
Indication of preset
reception frequency in the
frequency
preselection
mode.
CH indication steady:
Indicates the storage
channel.
1
0
(right indication)
1
0
(right indication)
1
0
(right indication)
ON indication.
1
0
(right indication)
OFF indication.
CH indication flashes:
If the initiated storage
operation is not completed
by pressing the store key.
Rear of unit
Page 20
Issue 12/97
BNC
50 Ohm antenna connecting sockets
VOR/LOC-Receiver
TNC
50 Ohm antenna connecting sockets GS-Receiver
Issue 12/97
Page 13
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
25-pin
D sub-male
Equipment connector for connecting
the installation wiring
15-pin
D sub-male
Equipment connector for connecting
the installation wiring Indicator IN 3300 - ( )
9-pin
D sub-male
Equipment connector for connecting interface
RS 422
Channel setting mode
Display of the stored frequencies in the storage channels. The
channels can be selected using the frequency selector switches.
NOTE
All setting or frequency changes are automatically stored after two seconds. This means that changes which are made
immediately before switching off are not stored. This does
not include deliberate storage operations performed using
the STO key.
q Frequency setting mode
The left display indicateds the active frequency. The right display is switched off.
The active frequency can be changed with the MHz and kHz frequency
selector switches.
The set frequency is held even when the unit is switched off.
Page 14
Issue 12/97
Issue 12/97
Page 19
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
OPERATING INSTRUCTIONS
q GS mode with the NR 3320 - ( )
1. Set the frequency of the localizer.
2. Switch on the VOR/LOC identification (press the IDT key, ON appears briefly in the display). Monitor the Morse identification signal
and compare it with the identification signal of the wanted localizer.
q Operating instructions NAV receiver
Preparation
Switch on the aircraft power supply (check that the circuit breaker for the
navigation receiver is set).
3. If a glidepath signal of sufficient strength is present, the GS warning flag disappears from the field of view.
WARNING
4. The GS needle (horizontal command needle) deflects during the
approach in the direction in which the flight level has to be corrected in order to obtain the specified glidepath. A mid position of the
needle means that the aircraft is on the glidepath.
Do not switch on the navigation receiver if engines or motors
are being started up or shut down.
q Switching on the navigation receiver
q Operation of the various modes
The navigation receiver contains various functions which are performed
under three modes. The individual modes are selected by pressing the
MDE key.
Frequency setting mode
Display of the active frequency in the left indication. The right
indication is switched off. The active frequency can be directly
changed using the frequency selector switches. Frequencies
can also be stored in the individual storage channels.
1. Rotate the volume control clockwise and switch on the navigation
receiver.
2. Both LCDs must show the numbers 188.88 flashing approximately
2 seconds. If the test is positive, the navigation receiver automatically switches to the mode which was selected before switch-off. If
the test is negative, the LCD flashes for approximately 5 seconds.
In all modes, disturbances of the navigation system are displayed
in the form of fault messages.
Frequency preselection mode
Display of the active and preset frequency. The preset frequency
can be set using the frequency change switches. Pressing the
exchange key changes over from the active to the preset frequency. Frequencies can also be stored in the individual storage
channels.
4. A comprehensive description of the various modes follows the general operating instructions.
Page 18
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Issue 12/97
l
E2 synthesizer failed,
l
E3 EEPROM fault
Page 15
BECKER NR 3320 - ( ) / NR 3330 - ( )
Operating Instructions
q TEST mode (by pressing the TEST button)
Press the TEST key. All digits should flash on and off in both liquid crystal displays (display test). At the same time, the VOR/LOC pointer (vertical needle) of the connected indicator should deflect fully and the
VOR/LOC warning flag should disappear from view. In the NAV receiver NR 3320 - (1) the GS pointer (horizontal needle) of the connected
indicator should deflect fully and the GS flag should disappear from
view.
q VOR mode
6. When overflying the VOR station, the TO/FROM display moves
from TO to FROM. If the flight is continued on the same heading,
the course indication shows the magnetic position line of the VOR
station which the aircraft is approaching, with the vertical needle
in the mid position.
q Monitoring flight and weather information
1. Press the IDT key. The word OFF appears briefly in the (right indication) of the LC display. Identification transmissions are faded
out.
2. The fading out of the VOR/LOC indentification signal means that
flight and weather information can now be monitored.
1. Set the frequency of the wanted VOR station.
2. To monitor the identification signal, press the IDT key (ON appears briefly in the (right indication) of the LC display). Monitor the
identification signal and compare it with the identification signal of
the wanted VOR station. Adjust the volume using the VOL control.
3. Press the IDT key again. The word ON appears briefly in the display. The identification signal can now be monitored.
3. If an evaluable VOR signal enables a safe bearing to be established, the vertical needle deflects and the VOR/LOC flag disappears from the field of view.
1. Set the frequency of the required localizer.
4. Rotate the omnibearing selector (OBS) on the display unit until
the TO/FROM display indicates TO and the vertical needle has
settled in the mid position. The heading indication then indicates
the magnetic course to the VOR station.
2. Switch on the VOR/LOC identification (press the IDT key, ON appears briefly in the display). Monitor the Morse identification signal
and compare it with the identification signal of the wanted localizer.
5. Course deviations during the approach are indicated in the direction of correction by the vertical needle (course correction in the direction of the needle deflection).
3. The vertical needle (command needle) deflects during the approach to the localizer in the direction in which the course is to be
corrected in order to obtain the correct landing course. A mid position of the needle means that the aircraft is on the correct line for
landing.
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Issue 12/97
Issue 12/97
q LOC mode
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