Repeater Compositions / ISDB-T Digital TV Broadcasting Relay Systems

Product code: 6554B

Outline

This is switch controller that switches two power amplifiers automatically or manually in the relay station of ISDB-T Digital Terrestrial Broadcasting. The state of each equipment is observed, and when abnormally generated, it switches automatically. Moreover, the remote control watch is possible according to the remote controller separately prepared.
It is excellent in reliability by the use of the transfer type coaxial switch. And, the switch time has achieved 10mS or less.
Because the DC power supply input are diode-compared in the unit, even when the power supply of one method breaks down, it can be operated.
It is possible to correspond with the by-pass of the connecting cable in the emergency and maintenance is easy, because all interfaces of the RF signal and operations SW are arranged in a front panel.
It is possible to mount on 100mm in height and space-saving.
Moreover, the malfunction prevention measures have been achieved by the watch dog timer function.
Even though it becomes a power line failure, broadcasting is continued because the latch is done as for the state of the coaxial switch. Moreover, the electrical power control of PA is released at that time.

Structure

External size: 480(W) x 99(H) x 450(D)mm (Excluding protrusions)
Mass: 6.0kg or less

Specification

Input level			Depend at the specified PA output level.
Frequency			All UHF channel
Impedance			50Ω
I/O connector			S
General specification	Power supply		DC 48V±15%
	Power consumption		10W or less
	Environmental requirements	Temperature	-10 to +45°C
		Humidity	45% to 90%RH (Without dew.)

Performance

Insertion loss	0.5dB or less
Isolation	60dB or more
VSWR	1.2 or less
SW time	10msec or less