Kathrein MSK 24 manual Technical Appendix, Signal-to-noise distance, +14.1 dB

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Technical Appendix

Signal-to-noise distance

The following values must be known in order to calculate the carrier-to- noise distance (C/N) for analogue transponders.

∙background noise level (set parabola antenna so that no satellite signal is received)

∙max. receiving level

∙bandwidth correction.

This gives the following formula:

C/N = receiving signal level - background noise level - bandwidth correction

Measured bandwidth of MSK 24 6 MHz

Bandwidth correction value = 10 log ——————————————–--------

RF bandwidth of receiving signal

Bandwidth correction value = 6.37 dB at 26 MHz bandwidth (Astra)

Bandwidth correction value = 7.78 dB at 36 MHz (Eutelsat, Intelsat, Kopernikus)

Example
	Receiving signal level	+75.5 dB	with satellite signal
0	Background noise level	-55.0 dB	without satellite signal
	Carrier-to-noise distance C/N	+20.5 dB
	Bandwidth correction	- 6.4 dB	for 26 MHz bandwidth
	C/N of the receiving system	+14.1 dB

Note

	+	To calculate C/N exactly, it is essential that you take the RF bandwidth of
	+	the receiving signal into account.
		the receiving signal into account.

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Contents Satellite / TV / Radio Test Receiver MSK Page Preface Validity of this manualContents Spectrum measurement Technical AppendixGeneral Notes Explanation of symbolsSafety instructions Parts suppliedHow it operates Overview of functions Block diagram of MSK Technical Data SAT10 V...20 V, max mA Connections right side Operating and display elementsDisplay elements LC displayOverview of the keyboard commands External DC voltage supply ConnectionsRF input socket Scart outputStarting up Switching on the receiverSwitching off the receiver Software Accu LEV 48.5dBuVSettings in the setup menu Setup menuFactory settings Setup menuBattery operation Mains and battery operationMains operation Sat measurement Standard Switch-OverPress 2ndF STD Frequency Display and Entering Frequency Overview of commands in Entering Frequency SATPress 1 5 0 8 E Nter LEV .dBuV Level MeasurementLevel Overflow and Underflow LEV dBuVChange the measuring range of the bar display 2ndF Scan Switch over to Scan operationTracking Satellites Calling up the Scan functionOverview of commands in Tracking Tracking for Single FrequenciesButton Frequency in MHz Bandwidth in kHz Audio Carrier FrequencyPress 2ndF SC LNB voltage Button LNB Voltage and 22 kHz / 60 Hz Switch-OverOverview of commands in LNB Voltage Example LNB14,0V 150mA Press buttons 2ndF LNBExample LNB14,0V 22kHz 150mA DiSEqC Digital Satellite Equipment Control Parity bitOverview of commands in Framing Byte Press buttons 2ndF SAT-CTRLOverview of commands in Address Byte Hex byte DescriptionOverview of commands in Command Byte Sat measurement Overview of commands in Simple DiSEqC Overview of commands in Data ByteOrbit Switch position Data Position Simple Tone Burst DiSEqCDiSEqC-SIMPLE Tone Burst Enter the figures 0 to SEC Vario-Satellite Equipment Control2ndF SAT-CTRL Call up the V-SEC menu Enter the letters A...F ButtonTV measurement Overview of commands in Standard Switch-Over TV=BG 2=L 3=DK =I 5=MN 6=M1 Channel Display and Entering Channel Switch over to TV receptionSwitch to special channel Enter the channelThen 1 7 5 ./S 2 5 Enter Level Measurement TV LEV.dBuVLEV-RANGE2 TV Example Press buttons 2ndF LevelStandard Audio carrier Nicam Overview of commands in Measuring Audio Carrier FrequencyAudio Carrier Distance and Level SC 5.50MHz LEV -13.0dB LEV 58.5dBuVCalling up Measuring Audio Bit Error Rates Nicam Measuring Audio Bit Error RatesSC 5.85 MHz BER=2.145E-05 Press 2ndF FM FM measurement2ndF FM Then 9 9 ./S 2 5 EnterFR104,80MHz FM LEV¯¯¯.¯dBuV TV Spectrum Spectrum measurementSat Spectrum SAT-FullTV full Overview of commands in TV SpectrumFM Spectrum TV narrowChanging the battery MaintenanceCustomer service Technical Appendix Signal-to-noise distance+14.1 dB Command set for Kathrein matrix 9xx-series DiSEqC commands for Kathrein matricesCommand set for Kathrein matrix EXR Channel tables VHF-CCIR UHF-CCIRChannel and frequency table for L standard frequency in MHz VHF UHFIII Channel and frequency table for I standard frequency in MHz Technical Appendix Technical Appendix Technical Appendix Page 936.1997/ZWT/PF Technical data subject to change