Relay Compositions of DTV Relay Stations

Product code: 6584

Front view

Outline

This is a multi pass equalizer used for the relay station of the digital terrestrial broadcasting. In the relay system from the parents station to the end station, each relay station can remove the signal deterioration occurred by the propagation channel's multi pass obstruction.

After decreasing the multi pass obstruction by equalization, it is possible to retransmit compared with CN of 40dB or more that satisfies a standard communication circuit design because it judges the signal point.

Structure

JIS rack mount type
External size: 480(W) x 49(H) x 400(D)mm (Excluding protrusions )
Mass: 6.0kg or less

Specification

(Input and output level is the average level.)

Input	Frequency	37.15MHz (center frequency)
	Frequency range	±10kHz
	Level	-10dBm±5dB
	Impedance	50Ω/BNC type (Unbalance)
output	Frequency	37.15MHz (center frequency)
	Level	-10dBm±0.5dB
	Impedance	50Ω/BNC type (Unbalance)
Power supply voltage		DC48V±15% or less
Power consumption		30W 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

Possible equalization multi pass delay time range	Guard interval lengthThe time range including both advance waves and the delay waves against the high-ranking station signal.
Equivalent C/N before symbol judgment processing	35dB or more [Condition] Multi pass wave: 1 (D/U=6dB, within 9/10 of guard interval length) Equivalent C/N of high-ranking station signal: 45dB C/N in reception part: 40dB
Symbol judgment processing function	The presence of the judgment can be switched.
Equivalent C/N after symbol judgment is processing	42dB or more [Condition] Multi pass wave: 0 Equivalent C/N before symbol judgment processing: 28dB
Synchronous establishment time	Within 3sec
Equalization coefficient update	Each symbols
Device delay time	8ms or less (When equalization processing)
Frequency characteristic	1.0dBp-p or less at fc±2.79MHz [Condition] Multi pass wave: 0 At judgment equalization operation
IM	-50dB or less
Spurious characteristic	-60dBc or less against the average output. (IM is excluded.)

Remarks

This is a successor of the multi pass equalizer CU20MP (Height=100mm).