Relay Compositions of DTV Relay Stations

(Product code：6505NA)

Outline

This is a low noise amplifier for the relay station of ISDB-T Digital Terrestrial Broadcasting.
It achieves a low noise by using GaAs FET.

Structure

Main body (LA20SR)　mounting type
External　size： 214.6(W)×49(H)×235(D)mm　(Excluding protrusions)
Mass： 6kg or less

Rating

(The I/O level is a mean value.)

Bandwidth	Specified bandwidth in the following band (1) 470MHz to 590MHz (2) 550MHz to 690MHz (3) 650MHz to 770MHz
Input level	Rating：-47dBm±20dB/CH Maximum：-13dBm (All of input channels)
Input impedance	50Ω/TNC type (Unbalanced)
Power gain	13dB
Output level	Rating: -34dBm±20dB/CH Maximum: 0dBm (All of output channels)
Output impedance	50Ω/TNC type (Unbalanced)
Monitor output impedance	50Ω/BNC type (Unbalanced)
Power supply voltage	DC+48V±15% or less
Power consumption	10W or less
Use conditions	Continuous use
Environmental requirements	Temperature	-10°C to 45°C (Range for in-spec)
		-20°C to 60°C (Range for spec restorable)
	Humidity	45% to 90%RH (Without dew.)

Performance

Gain flatness	1dBp-p or less(Range of specified bandwidth)
	0.5dBp-p or less (Range of channel)
Noise factor	2.5dB or less
IM	-55dB or less
Output return loss	20dB or more
Monitor output level	-20dB±1dB or less(To the output)
Alarm monitoring item	Power failure	The PhotoMOS-relay is closed and outputted, when the internal voltage (+12V) is failed.
	Alarm interface (At mounting on LA20SR)	Non-voltage contact outputContact ratingDC24V、0.1A or less(ALARM)D-sub 15S　M2.6 type

Function

This is a low noise amplifier to amplify the received power from the antenna in relay station. This two amplifier can be mounted on main body (LA20SR), and it is possible to correspond to the relay station of dual line (operation and standby) system.