36
TV MEASUREMENT
Example
Launching the “Find level” function:
Press the
[LEV]
button.
Turn the antenna until the bar display reaches its maximum.
If necessary, decrease or increase the sensitivity using the
[<]
and
[>]
buttons.
Turn the antenna until you have reached the maximum level.
To exit “Find level”:
Press the
[LEV]
button.
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
M/N
4.5 MHz
4.72 MHz
-----
L
AM 6.5 MHz
-----
5.85 MHz
M1 (Japan)
4.5 MHz
-----
-----
In audio carrier measurement the signal spacing between audio and
video carrier in dB is measured fi rst, 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”
[SUBC]
Switch to audio carrier menu
[1]
...
[2]
Switch between TT1 and TT2 (see table)
Audio carrier measurement while button is pressed
[3]
Switch to Nicam reception
Example
To measure audio carrier level spacing and level of TT1:
Press
[SUBC]
,
now press
[1]
and keep the button pressed.
The LC display indicates the following values for app. 1 second:
• Audio carrier level spacing - frequency: 5.5 MHz
• Audio carrier - video carrier spacing: -13 dB
• Operating mode: Analogue cable TV
