How it Works
BendixKing
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CNI 5000
User Manual
17 pgs336.86 Kb0
Table of contents
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BendixKing CNI 5000 User Manual

Pilot’s Guide CNI 5000
Integrated Avionics System
N
Table of Contents
Introduction ..........................................................................................2
System Components ............................................................................3
Operating Instructions-COMM .............................................................4
Power Up....................................................................................4
Transmitting................................................................................4
Program Mode............................................................................5
Program-Secure Mode...............................................................5
Channel Mode............................................................................6
Default Mode..............................................................................6
Display Adjust Mode...................................................................6
Operating Instructions-NAV.................................................................8
Power Up....................................................................................8
Frequency Selection...................................................................8
Nav Frequency Operation ..........................................................8
Operating Instructions-ADF .................................................................9
Power Up....................................................................................9
Frequency Selection...................................................................9
Erroneous ADF Bearings
Station Overlap..................................................................11
Electrical Storms................................................................11
Night Effect ........................................................................11
Mountain Effect..................................................................11
Coastal Refraction .............................................................11
Operating Instructions-MODE S.........................................................12
Front Panel Operation..............................................................12
Function Selector (Modes of Operation)...................................13
XPDR 1 / XPDR 2 Switch.........................................................14
Display Adjust Mode.................................................................14
1

Introduction

The CNI 5000 is a compact and light weight Integrated Avionics System designed especially for the sophisticated environment of today’s cockpit.
The integrated design of the CNI 5000 provides the pilot with full-featured COMM/NAV/IDENT capability in a single unit. With large, self-dimming gas-dis­charge displays, the CNI 5000 is easy to read from virtually any viewing angle in the cockpit. COMMs, NAVs, and ADF feature “flip-flop” frequency preselection which gives the pilot the ability to set up en route or approach frequency changeovers well in advance of the actual transition point or ATC handoff sequence for true “stay­ahead” flight management.
Innovative non-volatile memory circuits hold all displayed frequencies in storage— through aircraft shutdowns or momentary power interruptions—without the need for battery power of any kind.
Seven modules make up the CNI 5000. These include two COMMs, two NAVs, an ADF and two Transponders (XPDR). The modular architecture of the CNI 5000 makes it possible to replace a COMM, NAV, ADF or XPDR portion of the system with out complete removal of the CNI unit.
Each STANDARD COMM is capable of tuning 760 frequencies from 118.000MHz to 136.975MHz with frequency spacing of 25kHz. An optional COMM package is available with each COMM capable of tun­ing 2280 frequencies from 118.0000 MHz to 136.9916 MHz with frequency spacing of
8.33 kHz. An audio-leveling feature auto­matically amplifies weak audio signals and mutes signals that are too strong. A safety feature of the CNI 5000 COMMs is the stuck-microphone indicator. If the mic is keyed for more than two minutes, the dis­play will begin to flash, and the unit will cease transmitting. This alerts you to the problem while it prevents you from inadver­tently jamming a frequency and making it unusable to other pilots.
The versatile NAVs will tune all 200 VOR/LOC frequencies in addition to the 40 glideslope frequencies. Output is also pro­vided for automatic changing of the remote
DME system.
The ADF receiver provides accurate bearing to stations in the 200kHz to 1799kHz frequency range. Complete ADF, ANT and BFO tuning modes are provided, along with audio output for station identifi­cation and monitoring of AM broadcasts.
It’s advanced “coherent detection” design rejects unwanted interference, achieves significantly greater range and has less susceptibility to engine noise, sta­tic, and atmospheric interference.
The standard CNI 5000 offers dual Mode S transponders. A version of the CNI 5000 is also available with dual ATCRBS Transponders for special interna­tional applications.
The new Mode S (Mode Select) transponders are designed to provide ATC with improved aircraft surveillance and reporting accuracy, and reduce interfer­ence in identity and altitude reporting. These improvements are made possible be cause each aircraft is assigned a unique address code. By using this code in the form of a discrete addressing system, a Mode S ground installation is able to selectively interrogate a specific aircraft, even in high-density situations. This signifi­cant improves the ability of ATC to monitor and direct your aircraft—along with those around it. Offering full Mode A and Mode C compatibility, Mode S meets all current ATCRBS technical requirements.
The CNI 5000 Mode S and ATCRBS Transponders feature digital display of encoded altitude and ATC code, push but­ton selection of VFR code, remote-ident switch capability, and a XPDR 1/2 Select Switch for quick selection of either transponder.
The CNI 5000 offers state-of-the-art technology and pilot-preferred features to significantly increase cockpit efficiency and decrease pilot workload.
This Pilots Guide covers basic operat­ing procedures of the CNI 5000 by function, i.e. COMM, NAV, ADF and XPDR. Simple operation and the ease with which you can learn to use it serve to enhance it’s perfor­mance and capabilities.
2
XPDR Switch selects which transponder is active
USE STBY
COMM 1
USE STBY CHAN
COMM 2
USE STBY
NAV 1
USE STBY
NAV 2
ADF
ADF
IDT
XPDR 1
IDT
XPDR 2
BFO FLT
USE STBY/TIMER
ADF
BFO FRQ
FL
071
FL

System Components

ı
Dual 760 or optional 2280 frequency COMM tranceivers, each with nine pilot-program­able channels.
Fan-Fail Annunciators provide warning of internal cooling fan failure.
Dual NAV Receivers that will tune 200 VOR/LOC channels and 40 Glideslope channels.
Full-featured ADF Receiver tunes 200 kHz to 1799 kHz. Also has multi-function flight timer.
Dual Mode S Transponders with 4096 codes plus digital displays of encoded altitude.
ET/FLT
ON
ALT R
GND SBY
ON
ALT
GND SBY
CHAN
CHAN
CHAN
ET
SET
RST
R
PULL 25K
PULL
OFF
TEST
FAN
PULL 25K
PULL
OFF
TEST
FAN
PULL
OFF
ID
VOL
OFF
VOL
OFF
GND
TST
ON
SBY
ALT
OFF
VFR
PUSH
GND
TST
ON
SBY
ALT
OFF
VFR
PUSH
NAV
The CNI 5000 is a complete CNI package that includes dual COMMs, dual NAVs, sin­gle ADF and dual Mode S transponders. The unit features easy-to-read gas-dis­charge displays. COMMs, NAVs and ADF feature “flip-flop” tuning for push button fre­quency preselection. Dual Mode S transponders offer state-of-the-art ATC identification. The XPDR 1/2 switch selects the active transponder. The unit’s lighting operates off the aircraft dimming bus.
The CNI 5000 uses internal and external cooling fans to provide forced air cooling for optimum reliability. In the unlikely event of a fan failure, integrated Fan Fail Annunciators on the face of the CNI 5000 alert the pilot when an internal (FAN 1) or external (FAN 2) cooling fan has failed. Detailed operating instructions for each of the systems that comprise the CNI 5000 are given on the following pages.
3

Operating Instructions - COMM

Standard COMM (25 kHz Frequency Spacing)
Photocell for automatic dimmimg
"USE" window shows active frequency
"STBY" window shows stored or newly-entered standby frequencies
"CHAN" window shows selected channel number
USE STBY
COMM 1
"T" indicates mike button is depressed for transmission
Frequency transfer "flip-flop" button
Optional COMM (8.33 kHz Frequency Spacing)
Photocell for automatic dimmimg
COMM 1
"T" indicates mike button is depressed for transmission
"USE" window shows active frequency
USE STBY
Frequency transfer "flip-flop" button
"STBY" window shows stored or newly-entered standby frequencies
The CNI 5000 has two identical COMM transceivers. Each standard COMM is capable of tuning 760 frequen­cies from 118.000 MHz to 136.975 MHz with frequency spacing of 25 kHz. An optional COMM package is available with each COMM capable of tuning 2280 fre­quencies from 118.0000 MHz to 136.9916 MHz with frequency spacing of 8.33 kHz. The following operating instructions apply to COMM 1 and COMM 2.

Power Up.

When you turn the ON/OFF/ Volume knob clockwise to the “ON” position, your unit will display the frequencies last used in
CHAN
Channel button
CHAN
Channel button
CHAN
OFF
ON/OFF/Volume control switch. Pull out for manual squelch override.
"CHAN" window shows selected channel number
CHAN
OFF
ON/OFF/Volume control switch. Pull out for manual squelch override.
PULL TEST
PULL TEST
PULL
25K
Frequency selector knobs
PULL
8.33K
Frequency selector knobs
the “USE” and “STBY” (standby) windows.
To override the automatic squelch, pull the ON/OFF/Volume knob out and, judging by the static noise, rotate it to the desired volume level. Push the knob back in to activate the automatic squelch.

Transmitting.

During COMM transmissions, a “T” will appear between the “USE” and “STBY” windows to indicate the keying of the microphone.
USE STBY
COMM 1
CHAN
CHAN
PULL
25K
PULL
OFF
TEST
4
The Frequency Mode (Normal Operation). Standard COMM 1a. Select a new frequency in the “STBY”
window, using the frequency selection knobs. The larger knob controls changes in increments of 1MHz. The smaller knob con­trols changes in increments of 50kHz when pushed in, and 25kHz when pulled out. Proceed to Step 2.
USE STBY
COMM 1
T
CHAN
CHAN
PULL
25K
PULL
OFF
TEST
Optional COMM 1b. Select a new frequency in the “STBY”
window, using the frequency selection knobs. The larger knob controls changes in increments of 1MHz. The smaller knob con­trols changes in increments of 25kHz when pushed in, and 8.33kHz when pulled out. Proceed to Step 2.
USE STBY
COMM 1
CHAN
CHAN
PULL
8.33K
PULL
OFF
TEST
NOTE: On both the standard and optional COMM, the outside limits of the band, the display will “wrap around” to the other end of the band, going from 136MHz to 118MHz.
2. Press the transfer button to activate the new frequency. The newly entered fre­quency in the “STBY” window flip-flops with the frequency in the “USE” window. This new frequency is now available for use. An optional remote-mounted frequency trans­fer button may also be used to perform this flip-flop” function.
USE STBY
COMM 1
T
CHAN
CHAN
PULL
25K
PULL
OFF
TEST

Program Mode.

The Program Mode is used to program
frequencies for use in the Channel Mode.
1. Depress the channel (CHAN) button for more than two seconds, until the channel number (to the right of the standby frequen­cy) begins flashing. The most recently used active frequency will remain displayed in the “USE” window.
USE STBY
COMM 1
CHAN
CHAN
PULL
25K
PULL
OFF
TEST
2. Turning either frequency selection knob will change the channel.
USE STBY
COMM 1
T
CHAN
CHAN
PULL
25K
PULL
OFF
TEST
3. Once you’ve selected the desired chan­nel number, you may program a new fre­quency by pressing the transfer button. This will cause the frequency in the “STBY” window to flash. The tuning knobs are now used to enter desired frequency.
USE STBY
COMM 1
T
CHAN
CHAN
PULL
25K
PULL
OFF
TEST
4. To program additional channels, push the transfer button again to make the chan­nel number flash, and repeat steps two and three above.
5. If you wish to program fewer than nine channels while skipping certain channel numbers, rotate the MHz frequency knob left or right beyond 136MHz or 118MHz. Dashes (- - -) will appear in the “STBY” window, indicating that the channel will be skipped when the system is operating in the Channel Mode.
USE STBY
COMM 1
T
CHAN
CHAN
PULL
25K
PULL
OFF
TEST
6. To exit the Program Mode, momentarily press the channel button. The unit will also automatically exit the Program Mode if no programming occurs within approximately 20 seconds.
The Program-Secure Mode.
The Program-Secure Mode may be used to lock a desired frequency to a spe­cific channel number, prohibiting program changes from the front of the unit. This can be accomplished by an authorized Bendix/King Service Center.
5
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