Kathrein MSK 125 Audio Carrier Spacing and Level, Level Overflow and Underflow, Standard, Nicam

TV MEASUREMENT

LEVEL OVERFLOW AND UNDERFLOW

At a level < 30 dBµV the LC display indicates an underflow.

LC display:

•Channel: CH 05

•Operating mode: Analogue cable TV

•Level: underflow

At a level > 120 dBµV the LC display indicates an overflow.

LC display:

•Channel: CH 05

•Operating mode: Analogue cable TV

•Level: Overflow

Note

Levels of DVB-C and DVB-T-/H signal can only be measured if

Digital reception has been set.

AUDIO CARRIER SPACING AND LEVEL

TV stations can transmit on a second audio carrier - FM-modulated (analogue) - or in Nicam format (digital). Depending on the set standard the audio carriers are assigned various frequencies (see table). After channel and frequency entry audio carrier 1 is always set.

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
L	AM 6.5 MHz	-----	5.85 MHz

In audio carrier measurement the signal spacing between audio and video carrier in dB is measured first, then the absolute audio carrier level in dBµV. During the measurement the speaker is mute. After completion of the measurement the modulation of the audio carrier last measured can be heard.

COMMAND OVERVIEW FOR “MEASURE TV AUDIO CARRIER FREQUENCY”

	Switch to audio carrier menu
...	Switch between TT1 and TT2 (see table)
	Audio carrier measurement while button is
	pressed
	Switch to Nicam reception

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