Kathrein MSK 25 manual Sound Carrier Distance and Sound Carrier Level, TT1 TT2, 2ndF SC

TV measurement

Sound Carrier Distance and Sound Carrier Level

On a second sound carrier, TV broadcast stations can transmit either frequency-modulated (analogue) or in Nicam format (digital). Depending on the standard which has been set, various frequencies are assigned to the sound carriers, see table. Sound carrier 1 is permanently set after the channel entry or frequency entry.

Standard	TT1	TT2	Nicam
B/G	5.5 MHz	5.74 MHz	5.85 MHz
D/K	6.5 MHz	6.26 MHz	5.85 MHz
I	6.0 MHz	------	6.552 MHz
M/N	4.5 MHz	4.72 MHz	------
L	AM 6.5 MHz	------	5.85 MHz
M1 (Japan)	4.5 MHz	------	------

The sound carrier measurement is carried out by measuring the signal distance from the sound carrier to the picture carrier in dB before measuring the absolute sound carrier in dBµV. The loudspeaker remains muted during this procedure. When the measurement has been effected, the modulation of the sound carrier last measured can be heard.

TV Sound Carrier Measurement Menu

À	[2ndF] [SC]	Changing over to sound carrier menu:
	[1] bis [2]	Change-over between TT1 and TT2, see table
		Measurement is carried out when key is pressed

Example

✐

SC: 5,50MHz	TV
LEV: -13.0dB	A

SC: 5,50MHz	TV
LEV: 58,5dBuV	A

[3]Change-over to Nicam reception

Measuring sound carrier distance and sound carrier level of TT1:

Press [2ndF] [SC],

now press [1] and keep the key pressed.

The LC display will indicate the following values for appr. 1 second:

•Sound carrier distance – frequency: 5.5 MHz

•Sound carrier – picture carrier distance: -13 dB

•Mode: TV analogue

After about 1 second, the sound carrier level will be indicated.

LC display:

•Sound carrier distance – frequency: 5.5 MHz

•Sound carrier level: 58.5 dBµV

•Mode: TV analogue

Release key [1].

Measuring sound carrier distance and sound carrier level of TT2: Press [2] while the sound carrier is displayed

Measuring the distances and the levels of Nicam sound carriers:

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