Leader LT 4448 User manual

LT 4448
CHANGEOVER
Instruction Manual
Thank you for purchasing.
Please carefully read this instruction manual and the included "GENERAL SAFETY SUMMARY".
Please use the product safely.

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 Input Voltage.....................................................................................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..............................................................................................................6
2.3.4 Input Signals.......................................................................................................................7
2.3.5 Signal Switching.................................................................................................................7
2.3.6 Fault Detection...................................................................................................................8
2.3.7 Alarm Detection..................................................................................................................9
2.3.8 Key Lock.............................................................................................................................9
2.3.9 External Control Connectors............................................................................................10
2.3.10 General Specifications.....................................................................................................11
3. PANEL DESCRIPTION.............................................................................................12
3.1 Front Panel..............................................................................................................................12
3.2 Rear Panel...............................................................................................................................13
3.3 Top Panel.................................................................................................................................14
4. HOW TO USE...........................................................................................................15
4.1 Attaching Rack Supports.........................................................................................................15
4.2 Connecting and Disconnecting the Power Cord.....................................................................16
4.3 Turning the Power On.............................................................................................................17
4.4 Turning the Power Off .............................................................................................................17
4.5 DIP Switch Settings.................................................................................................................18
4.5.1Setting Method.................................................................................................................20
4.5.2 Setting the channel 1 to 11 input signals.........................................................................20
4.5.3 Setting the LTC Input Signal and OutputAlarm Indication..............................................22
4.5.4 Setting the Fault Detection Speed...................................................................................23
4.5.5 Setting the Fault Detection Reference.............................................................................25

4.5.6 Setting the Fault Detection Level (User-defined).............................................................26
4.5.7 Setting the Operation Mode, Standby Time and Fault information .................................27
4.6 Ch1 to 11 Signal I/O................................................................................................................29
4.7 LTC Signal I/O.........................................................................................................................30
4.7.1 LTC Connection Cables (LC 2183 sold separately) ........................................................31
4.8 LT 4448 Configuration.............................................................................................................33
4.8.1 Setting the Key Lock........................................................................................................33
4.8.2 Switching the Output Signal.............................................................................................33
4.8.3 Setting Automatic Signal Switching .................................................................................34
4.8.4 Switching the Control.......................................................................................................36
4.9 LT 4448 Indications .................................................................................................................37
4.9.1 Fault Indication.................................................................................................................37
4.9.2 Alarm Indications..............................................................................................................38
5. REMOTE CONTROL................................................................................................ 39
6. ETHERNET CONTROL............................................................................................ 42
6.1 SNMP Configuration Software ................................................................................................42
6.1.1 Installation........................................................................................................................42
6.1.2 Uninstallation....................................................................................................................45
6.1.3 Connection.......................................................................................................................46
6.1.4 Window Explanations.......................................................................................................47
6.2 SNMP ......................................................................................................................................49
6.2.1 SNMP Version..................................................................................................................49
6.2.2 Control Items....................................................................................................................49
6.2.3 SMI Definitions.................................................................................................................49
6.2.4 Notes on Updating ...........................................................................................................49
6.2.5 HOW TO USE ..................................................................................................................50
6.2.6 Enterprise MIB..................................................................................................................51
6.2.7 Extended TRAP (Variable Binding List)...........................................................................61
6.3 HTTP Server Feature..............................................................................................................63
6.3.1 Operating Environment....................................................................................................63
6.3.2 Precautions ......................................................................................................................63
6.3.3 HOW TO USE ..................................................................................................................64

I
GENERAL SAFETY SUMMARY
■Read This before Using the Instrument
This instrument should only be used by persons with sufficient knowledge of electronics who
thoroughly understand the contents of this manual.
This instrument is not designed or manufactured for households or ordinary consumers.
If unqualified personnel are to use the instrument, be sure the instrument is handled under the
supervision of qualified personnel (those who have electrical knowledge). This is to prevent the
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 local LEADER
agent.
■Symbols and Terms
The following symbols and terms are used in this instruction manual and on the instrument to
indicate important warnings and notes.
<Symbol> This symbol appears in this instruction manual and on the instrument to indicate an area
where improper handling could result in personal injury, damage to the instrument, or
malfunction of the instrument or devices connected to it.
When you encounter this symbol on the instrument, be sure to refer to the information in
this instruction manual that corresponds to the area that the symbol marks.
<Term> Ignoring the precautions that this term indicates could lead to death or serious injury.
<Term> Ignoring the precautions that this term indicates could lead to personal injury or damage
to the instrument.

II
GENERAL SAFETY SUMMARY
Read the warnings and information below thoroughly to avoid death, personal injury, and damage and
deterioration of the instrument.
■Warnings Concerning the Case and Panels
Do not remove the instrument's case or panels (except for DIP switch cover) for any reason
except for setting DIP switches. Touching the internal components of the instrument could lead
to fire or electric shock.
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 to fire,
electric shock, damage to the instrument, or some other accident.
■Installation Environment
● Operating Temperature Range
Use this instrument in a 0 to 40 °C environment. Using the instrument in a high temperature
environment could lead to fire.
Drastic changes in temperature, such as might be caused by moving the instrument
between two rooms with different temperatures, can damage the instrument by causing
condensation to form within it. If there is a possibility that the instrument has condensation
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 less where
there is no threat of condensation forming.
Also, do not operate this instrument with wet hands. Doing so could lead to electric shock or
fire.
● Do Not Operate in an Explosive Atmosphere
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 instrument in
such an environment.
● Do Not Insert Foreign Materials
Do not insert foreign materials, such as metal and flammable objects, through the vents or
allow liquid to enter the instrument. Such acts can lead to fire, electric shock, damage to the
instrument, or some other accident.
■If You Notice Something Wrong during Operation
If you notice smoke, fire, a strange smell, or something else that is wrong with the instrument
while you are operating it, stop operation immediately. Failing to do so could lead to fire.
Remove the power cord from the outlet. After making sure that fire has not spread anywhere,
contact your local LEADER agent.

III
GENERAL SAFETY SUMMARY
■Warnings Concerning the Power Source
Do not use a power source with a voltage other than the rated power source voltage for the
instrument. Doing so could lead to fire.
Confirm the voltage of the power source before you connect the power cord to it.
Only use a power source whose frequency is 50/60 Hz.
Use a power cord that is appropriate for the voltage of the power source. Also, use a power
cord that meets the safety standards of the country that you are using it in.
Using a power cord that does not meet the standards could lead to fire. If the power cord is
damaged, stop using it, and contact your local LEADER agent. Using a damaged power cord
could lead to electrical shock or fire.
When removing the power cord from the power outlet, do not pull on the cord. Pull from the
plug.
■Warnings Concerning Grounding
The instrument has a ground terminal to protect the user and the instrument from electric
shock. Ensure that the product is properly grounded for safe operation.
■Warnings Concerning the Panel
Sections of the panel are made out of glass. If the glass breaks, the broken glass may lead to
injury. Do not apply a strong shock to the panel, cut it with sharp metal, or damage it in any
similar manner.
■Cautions Concerning the Input and Output Connectors
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 Will Not Use the Instrument for an Extended Period of Time
If you will not use the instrument for an extended period of time, remove the power plug from
the outlet.
■Cautions Concerning the Ethernet Port
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.

IV
GENERAL SAFETY SUMMARY
■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. To ensure stable performance, we recommend
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 the outlet.
Do not use thinner or benzene when you clean the instrument's case, panels, or knobs. Doing so
could lead to paint chipping and the corrosion of plastic components. To clean 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 metal object
enters into the instrument, fire or electric shock may result.
■About the European WEEE Directive
This instrument and its accessories are subject to the European WEEE Directive.
Follow the applicable regulations of your country or region when discarding this instrument or its
accessories. Follow the EU Battery Directive when discarding the batteries that you removed from
this instrument.
(WEEE stands for Waste Electrical and Electronic Equipment.)
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 instruction manual.
To use the instrument correctly, be sure to follow those precautions as well.
If you have any questions or comments about this instruction manual, please contact your local
LEADER agent.

1. INTRODUCTION
1
1. INTRODUCTION
Thank you for purchasing this LEADER instrument. To use this instrument safely, read this
instruction manual thoroughly, and make sure that you know how to use the instrument properly.
If some point about the operation of this instrument is still unclear after you have read this
instruction manual, refer to the contact information on the back cover of the manual to contact
LEADER, or contact your local LEADER agent.
After you have finished reading this manual, keep it in a convenient place so that you can refer
to it when necessary.
1.1 Scope of Warranty
This LEADER instrument has been manufactured under the strictest quality control
guidelines. LEADER shall not be obligated to furnish the following free services during the
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 by personnel
other than a factory-trained LEADER representative.
3. Repair of malfunctions or damages resulting from improper use.
4. Repair of malfunctions caused by devices other than this instrument.
5. Repair of malfunctions or damages without the presentation of a proof of purchase or
receipt bill for the instrument.
1.2 Trademark Acknowledgments
The company and product names in this document are trademarks or registered trademarks
of their respective holders.

1. INTRODUCTION
2
1.3 Operating Precautions
1.3.1 Power Supply Voltage
Confirm the voltage of the power source before you connect the power cord to it.
The power requirements of this product are indicated on the rear panel. Only use a power
source that supplies a voltage within the operating voltage range and has a frequency of
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 or lead
to injury.
Table 1-1 Maximum allowable input voltage
Input Connector Maximum Allowable Input Voltage
CHANNEL 1 and 2 (PRIMARY, BACKUP) ±5V
CHANNEL 3 to 10 (PRIMARY, BACKUP) ±1.5V
CHANNEL 11 (PRIMARY, BACKUP) 0V/+5V (TTL)
LTC (PRIMARY, BACKUP) 4Vp-p
1.3.3 Mechanical Shock
This instrument contains sensitive components, so it may be damaged if it is dropped or
otherwise exposed to a strong shock.
1.3.4 Electrostatic Damage
Electronic components can be damaged by static discharge. Static electricity can build up
in the core wire of a coaxial cable. Before connecting a coaxial cable to an I/O connector of
the instrument, short the core wire of the cable with the external conductor.
1.3.5 Warming Up
To ensure more accurate measurements, turn ON the instrument approximately 30 minutes
before you intend to use it to allow its internal temperature to stabilize.

2. SPECIFICATIONS
3
2. SPECIFICATIONS
2.1 General
The LT 4448 is a changeover unit that automatically switches the signal from the primary
signal to the backup signal when problems are detected in the primary signal. Two systems of
input signals (primary and backup) are connected to the LT 4448, and the LT 4448 detects
errors in the amplitude of the primary input signal.
A single LT4448 has 11 BNC channels and 3 LTC channels. These channels can receive SDI,
NTSC/PAL black burst, HD tri-level sync,AES/EBU digital audio, word-clock signals, and LTC
signals. SDI signals are switched with relays; all other signals can be switched with electronic
switches. The power supplies are redundant. Alarms are generated when errors occur.
The LT 4448 is used in combination with the LT 4610 (SYNC GENERATOR) or the LT 4600A
(MULTIFORMAT VIDEO GENERATOR) at close distance.
2.2 Features
● I/O Connectors
A single LT4448 is equipped with 11 sets of BNC I/O connectors and 3 sets of LTC I/O
connectors.
A single set consists of a primary input connector, a backup input connector, and an output
connector.
● Input Switching
Relays are used to switch between the primary signals and backup signals of channels 1
and 2.
High-speed electronic switches are used to switch between the primary signals and backup
signals of channels 3 to 11 and LTC.
● Selecting the Input Signal
On channels 1 and 2, you can select SDI signals (3G, HD, SD), NTSC/PAL black burst
signals, or HD tri-level sync signals.
On channels 3 to 8, you can select NTSC/PAL black burst signals or HD tri-level sync
signals.
Channels 9 and 10 are exclusively for AES/EBU digital audio signals.
Channel 11 is exclusively for word-clock signals. It receives TTL signals.
LTC channels are dedicated to LTC signals. They are 2 Vp-p differential inputs.
● LTC Channels
LTC channels provide three systems of two inputs (primary and backup) and three systems
of one output.
It can also connect to an LT 4610 (SYNC GENERATOR) with a dedicated cable (sold
separately).