Leader LT4448 - Auto Changeover for the LT4610 and LT4600A

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.

A single LT4448 provides 11 channels. These channels can receive LTC, SDI, NTSC/PAL black burst, HD tri-level sync, AES/EBU digital audio, and word-clock 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 can be used in combination with LT4610(SYNC GENERATOR).

Combination of LT4610 and LT4448

Key Features:

Input / Output

Provides 11 channels (a single channel consists of a primary input, a backup input, and an output) on a single LT4448.
 

Switching input signal

Relays are used to switch channels 1 to 2. Electronic switches are used to switch channels 3 to 11. In addition to the electronic switches, channels 4 to 11 are also equipped with high-speed, error detection circuits. Provides 3 channels (a single channel consists of a primary input , a backup input and an output) for the LTC.
 

Select an input signal

The channel 1and 2 inputs are dedicated input for SDI signal (3G/HD/SD), NTSC/PAL Black burst and Tri-Level Sync signal. The channel 3 to 8 inputs are dedicated input for NTSC/PAL Black burst and Tri-Level Sync signals. The channel 9 and 10 inputs are dedicated input for AES/EBU digital audio signals. The channel 11 input is dedicated input for word-clock signal(TTL). For LTC signal, LTC dedicated input / output (2Vp-p,differential input) is used.
 

LTC Channel

There are 3 LTC channels. Each has 2 inputs (primary, backup) and 1 output. In addition, it can be connected with LT4610 (SYNC GENERATOR) with a dedicated cable (optional).
 

Fault detection

When an input signal level error is detected, the LT4448 lights the panel fault LED as well as the panel LED that indicates the channel that is causing the problem. This feature allows quick investigation of the problem. Channels 3 to 11 are equipped with high-speed fault detection circuits. These enable the LT4448 to switch to a backup signal with barely any disturbances shown on the screen when problems, such as interruptions, occur in the primary signal.
 

Power Supply Start Time

Depending on the rise time of the system signal source to be connected, you can choose from about 1 minute / about 4 minutes from the time the power is turned on until the fault detection is started.
 

SNMP Ready

Error monitoring over an Ethernet network is possible. Traps are issued for error detection, panel control, and remote control. In addition, the error details and DIP switch settings (except for the user defined fault detection level) can be read as status information. IP address configuration software is included. (Windows 7 32bit/64bit , Windows 8 , Windows 10) Redundant power supply provides extra reliability. Alarms are generated when an error occurs.
 

Redundant Power Supply

Redundant power supply provides extra reliability. Alarms are generated when an error occurs.
 

Web Browser

 

It can be controlled by the web browser.