Repeater Compositions / ISDB-T Digital TV Broadcasting Relay Systems

Product code: 5639DC

Outline

This is power meter with automatic monitor function to measure and to observe RF level of each channel of MCPA (Multi Channel Power Amp) used by Digital Terrestrial Broadcasting. The RF signal of 4 waves or less is input, and the RF level of each channel is measured by timesharing. The measured power level percent display of rated power as 100% with an analog meter. As alarm function, when the measured level exceeds the pre-set threshold, the point of contact is output outside and alarm indication is displayed.

Structure

JIS rack mounting type
External size: 480(W) x 49(H) x 350(D)mm (Excluding protrusions)
Mass: 3.5kg or less

Specification

RF Input
Frequency		473 to 767 MHz (13 to 62 ch)
Number		1 method
Number of measuring cannel		Max. 4 wave
Power level		-20 to +5 dBm or less(adjusted by ATT.)
Impedance		50Ω/TNC connector
Alarm output
RF power level Abnormal alarm (Point Make, when abnormal)	Contact output	Non-voltage contact output(Photo-Moth relay)
	Contact rating	DC50V 400mA (Register load)
	Output connector	D-sub 37 pin (S), M2.6 screw type
Power supply alarm	Power failure alarm	Non-voltage contact output is done, in the case of power supply abnormal such as power SW off, power supply stop by circuit abnormal, AC input off, and etc.(Contact is Make, when abnormal)
Alarm output Setting final time (Setting time is All channel commonness)		Time from 0 to 5 minutes can be set every second.
RF power level abnormal alarm setting (The rated power is assumed to be 100 %.)
RF power level upper bound alarm setting. (Setting is All channel commonness)
RF power level decrease caution alarm setting. (Setting is All channel commonness)
RF electric power level lower bound alarm setting. (Setting is All channel commonness)
Meter output
DC out put		DC 3V output at rating output (100%)
Output connector		D-sub 25pin (S), M2.6 screw type
Telemeter output
DC out put		DC 3V output at rating output (100%)
Output connector		D-sub 25pin (S), M2.6 screw type
Communication LAN (RS-232C is optional, and using with LAN together is improper.)
Interface		IEEE 802.3 10BASE/T
Protocol		TCP/IP
Connector		Modular jack RJ45
General specification
Power supply voltage		DC+48V ±15% ( [DC IN-1], [DC IN-2] 2 methods input)
Power consumption		20W 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

Measuring range	Range of 150% fro 10%, when the ratings input as 100%.
Input power level measurement accuracy	±0.5dB of rating input (Range of 150% fro 50%)
	±1dB of rating input (Range of 50% fro 10%)

Attention: The power measurement only in the career cannot be done in the principle of the measuring method.