Leader LT 4446 User manual

LT 4446 / LT 4447
CHANGEOVER
INSTRUCTION MANUAL
USO RESTRITO

TABLE OF CONTENTS
GENERAL SAFETY SUMMARY......................................................................................... I
1. INTRODUCTION........................................................................................................ 1
1.1 Scope of Warranty.....................................................................................................................1
1.2 Trademark Acknowledgments...................................................................................................1
1.3 Operating Precautions...............................................................................................................2
1.3.1 Power Supply Voltage.............................................................................................................2
1.3.2 Maximum Allowable InputVoltage.........................................................................................2
1.3.3 Mechanical Shock..............................................................................................................2
1.3.4 Electrostatic Damage.........................................................................................................2
1.3.5 Warming Up .......................................................................................................................2
2. SPECIFICATIONS......................................................................................................3
2.1 General......................................................................................................................................3
2.2 Features.....................................................................................................................................3
2.3 Specifications ............................................................................................................................5
2.3.1 Compliant Standards..........................................................................................................5
2.3.2 I/O Connectors...................................................................................................................5
2.3.3 I/O Characteristics..............................................................................................................5
2.3.4 Input Signals.......................................................................................................................6
2.3.5 Signal Switching.................................................................................................................6
2.3.6 Fault Detection...................................................................................................................7
2.3.7 Alarm Detection..................................................................................................................8
2.3.8 Key Lock.............................................................................................................................8
2.3.9 External Control Connectors..............................................................................................8
2.3.10 Power Supply Unit (LT4447 only)......................................................................................8
2.3.11 Fan Unit (LT 4447 only)......................................................................................................8
2.3.12 General Specifications.......................................................................................................9
3. PANEL DESCRIPTION............................................................................................. 10
3.1 Front Panel..............................................................................................................................10
3.2 Rear Panel...............................................................................................................................11
3.3 Top Panel.................................................................................................................................12
4. HOW TO USE .......................................................................................................... 13
4.1 Attaching the Cover Inlet Stopper ...........................................................................................13
4.2 Attaching Rack Supports.........................................................................................................14
4.3 Turning the Power On .............................................................................................................15
4.4 Turning the Power Off ..................................................................................................................16
4.5 DIP Switch Settings.................................................................................................................16
4.5.1 Setting Method.................................................................................................................17
4.5.2 Setting the Input Signals..................................................................................................18
4.5.3 Setting the Fault Detection Speed...................................................................................20
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4.5.4 Setting the Fault Detection Reference.............................................................................22
4.5.5 Setting the Fault Detection Level (User-defined).............................................................23
4.5.6 Setting the Operation Mode and StandbyTime..................................................................24
4.6 Signal I/O.................................................................................................................................25
4.7 LT 4446/4447 Configuration....................................................................................................26
4.7.1 Setting the Key Lock ........................................................................................................26
4.7.2 Switching the Output Signal.............................................................................................26
4.7.3 Setting Automatic SignalSwitching..................................................................................26
4.8 LT 4446/4447 Indications ........................................................................................................28
4.8.1 Fault Indication.................................................................................................................28
4.8.2 Alarm Indications..............................................................................................................29
5. REMOTE CONTROL................................................................................................ 31
6. ETHERNET CONTROL............................................................................................ 33
6.1 SNMP Configuration Software ................................................................................................33
6.1.1 Installation........................................................................................................................33
6.1.2 Uninstallation....................................................................................................................35
6.1.3 Connection.......................................................................................................................36
6.1.4 Window Explanations.......................................................................................................37
6.2 SNMP ......................................................................................................................................39
6.2.1 SNMP Version.......................................................................................................................39
6.2.2 SMI Definitions.................................................................................................................39
6.2.3 HOW TO USE..................................................................................................................39
6.2.4 Enterprise MIB..................................................................................................................40
6.2.5 Specific TrapType..................................................................................................................... 46
7. MAINTENANCE (LT 4447 ONLY)...................................................................................47
7.1 Cleaning the Air Filters (When they aredirty) .........................................................................47
7.2 Replacing the Air Filters (Once every twoyears)....................................................................48
7.3 Replacing the Fan Unit (Once every three years)...................................................................48
7.4 Replacing the Power Supply Unit (Once every threeyears)...................................................49
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GENERAL SAFETY SUMMARY
I
■Read This before Using the Instrument
This instrument should only be used by persons with sufficient knowledge of electronicswho
thoroughly understand the contents of this manual.
This instrument is not designed or manufactured for households or ordinaryconsumers.
If unqualified personnel are to use the instrument, be sure the instrument is handled underthe
supervision of qualified personnel (those who have electrical knowledge). This is to preventthe
possibility of personal injury or damage to the instrument.
■Note about Reading This Manual
The contents of this manual contain specialized terminology and may be difficult to understand.If
you have any questions about the contents of this manual, please contact your localLEADER
agent.
■Symbols and Terms
The following symbols and terms are used in this instruction manual and on the instrumentto
indicate important warnings and notes.
<Symbol>
This symbol appears in this instruction manual and on the instrument to indicate anarea
where improper handling could result in personal injury, damage to the instrument, or
malfunction of the instrument or devices connected toit.
When you encounter this symbol on the instrument, be sure to refer to the informationin
this instruction manual that corresponds to the area that the symbolmarks.
<Term>
Ignoring the precautions that this term indicates could lead to death or seriousinjury.
<Term>
Ignoring the precautions that this term indicates could lead to personal injury ordamage
to the instrument.
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GENERAL SAFETY SUMMARY
II
Read the warnings and information below thoroughly to avoid death, personal injury, and damageand
deterioration of the instrument.
■Warnings Concerning the Case and Panels
Do not remove the instrument's case or panels (except for the power supply unit, fan unit,and
DIP switch cover) for any reason except for setting DIP switches. Touching the internal
components of the instrument could lead to fire or electricshock.
Also, do not allow foreign materials, such as liquids, combustible matter, and metal, to enter
the instrument. Turning the instrument on when such materials are inside it could lead tofire,
electric shock, damage to the instrument, or some otheraccident.
■Installation Environment
●Operating Temperature Range
Use this instrument in a 0 to 40 °C environment. Using the instrument with its ventsblocked
or in a high temperature environment could lead tofire.
Drastic changes in temperature, such as might be caused by moving theinstrument
between two rooms with different temperatures, can damage the instrument bycausing
condensation to form within it. If there is a possibility that the instrument hascondensation
within it, wait for approximately 30 minutes before turning on the power.
●Operating Humidity Range
Use this instrument in an environment whose relative humidity is 90 %RH or lesswhere
there is no threat of condensation forming.
Also, do not operate this instrument with wet hands. Doing so could lead to electric shockor
fire.
●Do Not Operate in an ExplosiveAtmosphere
Using this instrument in an environment where flammable gasses, explosive gasses,or
steam is emitted or stored could lead to an explosion or fire. Do not use the instrumentin
such an environment.
●Do Not Insert Foreign Materials
Do not insert foreign materials, such as metal and flammable objects, through the ventsor
allow liquid to enter the instrument. Such acts can lead to fire, electric shock, damage tothe
instrument, or some other accident.
■If YouNotice Something Wrong during Operation
If you notice smoke, fire, a strange smell, or something else that is wrong with theinstrument
while you are operating it, stop operation immediately. Failing to do so could lead to fire.Turn
OFF the power switch, and remove the power cord from the outlet. After making sure thatfire
has not spread anywhere, contact your local LEADER agent.
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GENERAL SAFETY SUMMARY
3
■Warnings Concerning the Power Source
Do not use a power source with a voltage other than the rated power source voltage forthe
instrument. Doing so could lead to fire.
Confirm the voltage of the power source before you connect the power cord toit.
Only use a power source whose frequency is 50/60Hz.
Use a power cord that is appropriate for the voltage of the power source. Also, use apower
cord that meets the safety standards of the country that you are using itin.
Using a power cord that does not meet the standards could lead to fire. If the power cordis
damaged, stop using it, and contact your local LEADER agent. Using a damaged powercord
could lead to electrical shock or fire.
When removing the power cord from the power outlet, do not pull on the cord. Pull fromthe
plug.
■Warnings Concerning Grounding
The instrument has a ground terminal to protect the user and the instrument fromelectric
shock. Ensure that the product is properly grounded for safeoperation.
■Warnings Concerning the Panel
Sections of the panel are made out of glass. If the glass breaks, the broken glass may leadto
injury. Do not apply a strong shock to the panel, cut it with sharp metal, or damage it in any
similar manner.
■Cau t ions Concerning t he I npu t and O u t pu t Connec t ors
To avoid damaging the instrument, only apply signals to the input connectors that conform to
the specifications in this instruction manual. Do not short or apply external voltage to the output
connectors. Doing so could damage the instrument.
■ If You W ill No t Use t he I ns t rumen t f or an Ex t ended Period o f T ime
If you will not use the instrument for an extended period of time, remove the power plug from
the outlet.
■Cau t ions Concerning t he E t herne t Por t
When you are connecting the instrument to the communication provider's equipment, connect
to the Ethernet port through a hub that is authorized for use in the country that you are using
the instrument in.
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GENERAL SAFETY SUMMARY
4
■Calibration and Repair
This instrument has been carefully examined at the factory to ensure that its performance is in
accordance with the standards. However, because of factors such as parts wearing out over time,
the performance of the instrument may degrade. Toensure stable performance, werecommend
that you have the instrument calibrated regularly.Also, if the instrument malfunctions, repairs are
necessary. For repairs and calibration, contact your local LEADER agent.
■Routine Maintenance
When you clean the instrument, remove the power plug from theoutlet.
Do not use thinner or benzene when you clean the instrument's case, panels, or knobs. Doingso
could lead to paint chipping and the corrosion of plastic components. Toclean the case,panels,
and knobs, use a soft cloth with mild detergent, and wipe gently. While cleaning, make sure that
foreign materials, such as water and detergent, do not enter the product. If liquid or a metalobject
enters into the instrument, fire or electric shock mayresult.
■About the European WEEE Directive
This instrument and its accessories are subject to the European WEEEDirective.
Follow the applicable regulations of your country or region when discarding this instrument orits
accessories. Follow the EU Battery Directive when discarding the batteries that you removedfrom
this instrument.
(WEEE stands for Waste Electrical and ElectronicEquipment.)
Follow the warnings and precautions that have been listed in this section to use the instrument
correctly and safely. Precautions are also contained in various other sections of this instructionmanual.
Touse the instrument correctly, be sure to follow those precautions aswell.
If you have any questions or comments about this instruction manual, please contact yourlocal
LEADER agent.
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1 . I N T R O DUC TIO N
1
1. INTRODUCTION
Thank you for purchasing this LEADER instrument. Touse this instrument safely, read this
instruction manual thoroughly, and make sure that you know how to use the instrumentproperly.
If some point about the operation of this instrument is still unclear after you have readthis
instruction manual, refer to the contact information on the back cover of the manual tocontact
LEADER, or contact your local LEADER agent.
After you have finished reading this manual, keep it in a convenient place so that you canrefer
to it when necessary.
1.1 Scope ofWarranty
This LEADER instrument has been manufactured under the strictest qualitycontrol
guidelines. LEADER shall not be obligated to furnish the following free services duringthe
warranty period.
1. Repair of malfunction or damages resulting from fire, natural calamity, or improper
voltage applied by the user.
2. Repair of a product that has been improperly repaired, adjusted, or modified bypersonnel
other than a factory-trained LEADER representative.
3. Repair of malfunctions or damages resulting from improperuse.
4. Repair of malfunctions caused by devices other than thisinstrument.
5. Repair of malfunctions or damages without the presentation of a proof of purchaseor
receipt bill for the instrument.
1.2 Trademark Acknowledgments
The company and product names in this document are trademarks or registeredtrademarks
of their respective holders.
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1 . I N T R O DUC TIO N
2
1.3 Operating Precautions
1.3.1 Power Supply Voltage
Confirm the voltage of the power source before you connect the power cord toit.
The power requirements of this product are indicated on the rear panel. Only use apower
source that supplies a voltage within the operating voltage range and has a frequencyof
50/60 Hz.
1.3.2 Maximum Allowable Input Voltage
The maximum signal voltage that can be applied to the input connectors is indicated below.
Do not apply excessive voltage to the connectors. Doing so may damage the device orlead
to injury.
Table 1-1 Maximum allowable input voltage
Input Connector
Maximum Allowable InputVoltage
CHANNEL 1 to 3 (PRIMARY,BACKUP)
±5V
CHANNEL 4 to 10 (PRIMARY, BACKUP)
±1.5V
CHANNEL 11 (PRIMARY, BACKUP)
0V/+5V (TTL)
1.3.3 Mechanical Shock
This instrument contains sensitive components, so it may be damaged if it is droppedor
otherwise exposed to a strong shock.
1.3.4 Electrostatic Damage
Electronic components can be damaged by static discharge. Static electricity can buildup
in the core wire of a coaxial cable. Before connecting a coaxial cable to an I/O connectorof
the instrument, short the core wire of the cable with the external conductor.
1.3.5 Warming Up
Toensure more accurate measurements, turn ON the instrument approximately 30 minutes
before you intend to use it to allow its internal temperature tostabilize.
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2 . SPEC IFI C ATIO N S
2. SPECIFICATIONS
2.1 General
The LT 4446/4447 is a changeover unit that automatically switches the signal from theprimary
signal to the backup signal when problems are detected in the primary signal. Two systemsof
input signals (primary and backup) are connected to the LT4446/4447, and the LT4446/4447
detects errors in the amplitude of the primary inputsignal.
A single LT 4446/4447 provides 11 channels. These channels can receive SDI, NTSC/PAL
black burst, HD tri-level sync, AES/EBU digital audio, and word-clock signals. SDI signalsare
switched with relays; all other signals can be switched with electronic switches. Thepower
supplies are redundant. Alarms are generated when errorsoccur.
The LT 4446 and LT 4447 are used in combination with the LT4600 (MULTIFORMAT VIDEO
GENERATOR) and LT 4110 (SYNC GENERATOR), respectively, at close distance.
2.2 Features
● I/O Connectors
The LT4446/4447 is equipped with 11 sets of I/O connectors (a single set consists of a
primary input connector, a backup input connector, and an outputconnector).
● Input Switching
Relays are used to switch between the primary signals and backup signals of channels 1to
3.
High-speed electronic switches are used to switch between the primary signals andbackup
signals of channels 4 to 11.
● Selecting the Input Signal
On channels 1 to 3, you can select SDI signals (3G, HD, SD), NTSC/PAL black burst
signals, or HD tri-level sync signals.
On channels 4 to 8, you can select NTSC/PAL black burst signals or HD tri-levelsync
signals.
Channels 9 and 10 are exclusively for AES/EBU digital audiosignals.
Channel 11is exclusively for word-clock signals. It receives TTLsignals.
● Fault Detection
When an input signal level error is detected, the LT 4446/4447 lights the panel fault LEDas
well as the panel LED that indicates the channel that is causing the problem. Thisfeature
allows quick investigation of the problem.
Channels 4 to 11are equipped with high-speed fault detection circuits. These enable theLT
4446/4447 to switch to a backup signal with barely any disturbances shown on thescreen
when problems such as interruptions occur in the primarysignal.
● Alarm Detection
If an error is detected at an output connector of channels 4 to 11, power supply, or fan (LT
4447 only), a panel LED indicating where the error occurred lights to alert theuser.
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2 . SPEC IFI C ATIO N S
● Power Supply Start Time
A delay for starting the fault detection at power up can be set to approximately 1 minuteor
approximately 4 minutes depending on the rise time of the system signal source that theLT
4446/4447 is connected to.
●SNMPv1 Ready
Error monitoring over an Ethernet network is possible. Traps are issued for errordetection,
panel control, and remote control. In addition, the error details and DIP switchsettings
(except for the user-defined fault detection level) can be read as statusinformation.
IP address configuration software is included. (Compatible with Windows 7 32 bit and64
bit)
●Combining with an LT 4600 or LT 4110
The depths of the LT4446 and the LT4600(MULTIFORMAT VIDEO GENERATOR) are the
same. The same holds true for the LT4447 and the LT4110(SYNC GENERATOR). This
makes it easy to wire and operate the devices when you combine them.
● Redundant Power Supply
Redundant power supply provides extra reliability. Alarms are generated when errorsoccur.
●
Power Supply Unit and Fan Unit (LT 4447 only)
The power supply unit and fan unit support hot-swapping.
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2 . SPEC IFI C ATIO N S
2.3
Specifications
2.3.1
Compliant Standards
SDI Signal
3G-SDI
SMPTE ST 372, SMPTE ST 424,
HD-SDI (including HD dual link)
SD-SDI
SMPTE ST 425
SMPTE ST 274, SMPTE ST 292,
SMPTE ST 296
ITU-R BT.601, ITU-R BT.656,
SMPTE ST 125, SMPTE ST 259
Sync Signal
NTSC Black Burst Signal
SMPTE ST 170, SMPTE ST 318,
PAL Black Burst Signal
SMPTE RP 154
ITU-R BT.470-6, EBU N14
HD Tri-Level SyncSignal
SMPTE ST 274, SMPTE ST 296
AES/EBU Digital AudioSignal
AES3, SMPTE ST 276
2.3.2
I/O Connectors
Primary Input Connectors
Ch1 to 10
10 input connectors (75 Ω BNC connectors)
Ch11
1 input connector (TTL, 75 Ω BNC connector)
Backup Input Connectors
Ch1 to 10 10 input connectors (75 Ω BNC connectors)
Ch11 1 input connector (TTL, 75 Ω BNC connector)
Output Connectors
Ch1 to 10 10 output connectors (75 Ω BNC connectors)
Ch11 1 output connector (+5 V CMOS, 75 Ω BNC
connector)
2.3.3 I/O Characteristics
Ch1 to 3
Return Loss 30 dB (0 to 10 MHz)
15 dB (10 MHz to 1.5 GHz)
10 dB (1.5 to 3 GHz)
Insertion Loss 0.2 dB (0 to 10 MHz)
0.5 dB (10 to 500 MHz)
2.0 dB (1.5 to 3 GHz)
Crosstalk -60 dB (0 to 10 MHz)
-30 dB (10 MHz to 1.5 GHz)
-20 dB (1.5 to 3 GHz)
Impedance External termination
Maximum Input Voltage ±5V
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2 . SPEC IFI C ATIO N S
Ch4 to 10
Return Loss 30 dB (0 to 10 MHz, internallyterminated)
Insertion Loss 0.3 dB (0 to 10 MHz)
Crosstalk -55 dB (0 to 10 MHz)
-45 dB (10 to 30 MHz)
Input Impedance 75Ω
Output Impedance 75Ω
Maximum Input Voltage ±1.5V
Ch11
Input Impedance Approx. 4 kΩ
Output Impedance Approx. 60 Ω
Maximum Input Voltage 0V/+5V (TTL)
2.3.4 Input Signals
Setting Method Select the input signal type with DIP switchesfor
each channel.
Ch1 to 3 NTSC black burst signal
PAL black burst signal
HD tri-level sync signal
SD-SDI signal (270 Mb/s)
HD-SDI signal (1.485 Gb/s)
3G-SDI signal (2.97 Gb/s)
Ch4 to 8 NTSC black burst signal
PAL black burst signal
HD tri-level sync signal
Ch9 and 10 AES/EBU Digital AudioSignal
Ch11 Word-clock Signal (TTL)
2.3.5 Signal Switching
Switching Method
Ch1 to 3 Relays
Ch4 to 11 Electrical switches
Switch Time from the Panel
Ch1 to 3 10 ms or less
Ch4 to 11 100 ns or less
Switch Time due to Fault Detection
Ch1 to 3 70 ms or less
Ch4 to 8
High-Speed Detection 1.5 H or less
Low-Speed Detection 60 ms or less
Ch9 and 10
High-Speed Detection 6 us or less
Low-Speed Detection 60 ms or less
Ch11
High-Speed Detection 60 us or less
Low-Speed Detection 60 ms or less
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2 . SPEC IFI C ATIO N S
2.3.6 Fault Detection
Fault Indication Indicates with LEDs the problematic signal
system (PRIMARY or BACKUP) if a fault is
detected
Fault Channel Indication Indicates with LEDs the problematicchannels
when a fault is detected
DC Offset ±30 mV (sync signal only)
High-Speed Detection Detects a fault when a signal drops out
Low-Speed Detection Detects a fault when a signal level falls below
the detection level
Detection Level 2 to 5 dB below the specified level
Detection Reference Select LOW or HIGH with DIP switches foreach
input signal type.
Low level (*1)
NTSC Black Burst Signal -180 to -227 mV (-286 mV)
PAL Black Burst Signal -190 to -238 mV (-300 mV)
HD Tri-Level SyncSignal 337 to 476 mV (600 mV)
SD-SDI signal (270 Mb/s) 450 to 635 mV (800 mV)
HD-SDI signal (1.485 Gb/s) 450 to 635 mV (800 mV)
3G-SDI signal (2.97 Gb/s) 450 to 635 mV (800 mV)
AES/EBU Digital AudioSignal 631 to 794 mV (1000 mV)
Word-clock signal 1515 to 1907 mV (2400 mV)
High level (*1)
NTSC Black Burst Signal -210 to -264 mV (-286 mV)
PAL Black Burst Signal -220 to -277 mV (-300 mV)
HD Tri-Level SyncSignal 379 to 535 mV (600 mV)
SD-SDI signal (270 Mb/s) 505 to 713 mV (800 mV)
HD-SDI signal (1.485 Gb/s) 505 to 713 mV (800 mV)
3G-SDI signal (2.97 Gb/s) 505 to 713 mV (800 mV)
AES/EBU Digital AudioSignal 734 to 924 mV (1000 mV)
Word-clock signal 1759 to 2215 mV (2400 mV)
User-defined level (*2)
Ch1 to 8 -100 to -700 mV(when a signal that is equivalent
to a horizontal sync signal is applied)
Ch9 and 10 100 to 1400 mV (p-p value of input signal)
Ch11 500 to 3000 mV (high level of input signal)
Time from When the LT 4446/4447 Turns On to When Error Detection Starts
Approx. 1 min. (60 to 80 s) / approx. 4 min. (240
to 320 s)
*1 Depending on the instrument that you are using, there will be deviations in the detection level within
the ranges shown.
The parenthetical values are levels during normaloperation.
*2 Depending on the shape of the waveform, the detection level that you have set may not be reached.
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2 . SPEC IFI C ATIO N S
2.3.7
Alarm Detection
Alarm Indications
Indicates with LEDs when errors are detected in
output signals (channels 4 to 11 only), power
supply, or fan unit (LT 4447 only)
2.3.8
Key Lock
Lock and Unlock
Hold down the KEY LOCK key.
Auto Key Lock
Automatically locks the keys after 60 seconds of
inactivity (no key operations)
2.3.9
External Control Connectors
Remote Connector
Use
Remote control
Input
SYNC SOURCE, AUTO SWITCHING,RESET
Output
SYNC SOURCE, FAULT
Connector
9-pin D-sub (female)
Locking Screws
Ethernet Port
#4-40 inch screws
Use
SNMPv1 control (TRAP, STATUS)
Compliant Standards
10BASE-T/100BASE-TX auto switching
Connector
RJ-45
SNMP Read Community
LDRUser
SNMP Write Community
LDRAdm
SNMP TrapCommunity
LDRUser
SNMP negotiation
AUTO
USB Port
Use
IP address configuration
Compliant Standards
USB 1.1/2.0 or equivalent
Connector
Type B
2.3.10
Power Supply Unit (LT 4447 only)
Number of Units in Main Unit
2
Hot Swap
Supported
2.3.11
Fan Unit (LT 4447 only)
Number of Units in Main Unit
1
Hot Swap
Supported
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2 . SPEC IFI C ATIO N S
2.3.12 General Specifications
Environmental Conditions
Operating Temperature 0 to 40 °C
Operating HumidityRange 90 %RH or less (no condensation)
Optimal Temperature 5 to 35 °C
Optimal Humidity 85 %RH or less (no condensation)
Operating Environment Indoors
Elevation Up to 2,000 m
Overvoltage Category II
Pollution Degree 2
Power Requirements
Redundancy Supported
Voltage 90 to 250 VAC
Frequency 50/60 Hz
Power Consumption
LT 4446 25W max.
LT 4447 50W max.
Dimensions
LT 4446 426 (W) × 44 (H) × 400 (D) mm (excluding
protrusions)
LT 4447 426 (W) × 88 (H) × 450 (D) mm (excluding
protrusions)
Weight
LT 4446 4.0 kg (excluding rack support)
LT 4447 8.0 kg (excluding rack support)
Accessories Power cord........................................................2
Cover/Inlet stopper...........................................2
Rack supports...................................................2
Rack support mounting screws........................4
CD-ROM (software and instruction manual)....1
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3 . PAN E L D ES CR IPTIO N
10
3. PANEL DESCRIPTION
3.1 Front Panel
Figure 3-1 Front panel
Table 3-1 Front panel description
No.
Name
Description
Reference
1
ALARM
The LEDs light or blink when errors are detected in the power supply(LT
4446 only), rear-panel fan unit (LT 4447 only), or the output signalsof
channels 4 to 11.
4.8.2
2
FAULT
The LEDs light when faults are detected in the inputsignals.
4.8.1
3
SYNC SOURCE
Displays the signal that is being transmitted through the output connector.
Youcan press the key to manually switch the signal that is being
transmitted. The setting is shared among channels 1 to11.
4.7.2
4
AUTO SWITCHING
Selects whether the output signal will be switched automatically whena
fault is detected in the input signal The setting is shared among channels1
to 11. Select SWITCH FAULTto switch the output signalautomatically.
Select DISABLED to not switch the output signal automatically.
4.7.3
5
FAULT INDICATOR
The LEDs blink when faults are detected in the inputsignals.
Press RESET to reset alarm indications and faultindications.
4.8.1
6
KEY LOCK
The LEDs indicate the key lock on/off state. You can press the key toturn
the key lock on and off. Key lock turns on automatically after 1 minuteof
inactivity (no key operations).
4.7.1
7
USB
USB port. Connect to a PC to assign an IP address to the LT4446/4447.
6.1
8
POWER 1
POWER 2
(LT 4447 only)
These are power switches. ○ indicates off, and | indicates on. Theswitches
light when they are turned on. When both POWER 1 and POWER 2are
turned on, operation continues uninterrupted even if one of thepower
supplies fails.
4.3
4.4
9
ALARM
(LT 4447 only)
Lights when an error occurs in the power supplyunit.
4.8.2
10
Power Supply Unit
(LT 4447 only)
Two exchangeable power supply units (LP 2180s) are installed.
Exchange themperiodically.
7.4
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3 . PAN E L D ES CR IPTIO N
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3.2 Rear Panel
Figure 3-2 LT 4446 rear panel
Figure 3-3 LT 4447 rear panel
Table 3-2 Rear panel description
No.
Name
Description
Reference
1
PRIMARY
Primary signal input connector
4.6
2
OUTPUT
Transmits the signal that is received through PRIMARY or BACKUP
4.6
3
BACKUP
Backup signal input connector
4.6
4
Ground terminal
Connect to an externalground.
-
5
ETHERNET
Ethernet port. Youcan use this port to monitor the LT4446/4447 using SNMP.
6
6
REMOTE
Remote control connector. You can use this connector to performfunctions
such as configuring the LT4446/4447 and transmitting faultinformation.
5
7
Serial label
The serial number is printed on thislabel.
-
8
AC INPUT 1
AC INPUT 2
AC inlet.
Attach the included cover/inlet stopper to the ACinlet.
4.1
9
Fan Unit
(LT 4447 only)
An exchangeable fan unit (LP 2181s) areinstalled.
Exchange themperiodically.
7.3
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3 . PAN E L D ES CR IPTIO N
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3.3 Top Panel
Figure 3-4 Top panel
Table 3-3 Toppanel description
No.
Name
Description
Reference
1
DIP switch cover
Remove the four screws to access the DIP switches. You canuse
the DIP switches to configure the LT4446/4447. An explanationof
the DIP switch settings is printed on the back side of the cover.
4.5
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4 . H OW TO U SE
4. HOW TO USE
4.1 Attaching the Cover Inlet Stopper
A cover/inlet stopper is included with the LT4446/4447. Use this device to prevent thepower
cord from being pulled free of the AC inlet. Toattach or remove the cover/inlet stopper,follow
the procedure below.
●
Attaching the Cover/Inlet Stopper
1. Cover the power cord with the cover/inlet stopper.
2. Push the cover/inlet stopper, until you hear a click, to attach it to the AC inlet.
3. Check that the cover/inlet stopper is securely attached to the AC inlet.
● Removing the Cover/Inlet Stopper
1. Release the lock by using two fingers to press the cover/inlet stopper levers.
2. Pull the cover/inlet stopper away from the ACinlet.
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