User`s manual

Audio Subcarrier Input P ULSAR BG
Page 6
VID/A Sub-C FM A 5.5 MHz audio subcarrier is connected externally. Mixed
with a VC of 38.9 MHz this audio subcarrier will result in an
audio carrier of 33.4 MHz.
If there is a Stereo Coder installed, a 5.5 MHz audio subcar-
rier combined with a 5.74 MHz audio subcarrier can be con-
nected. After mixing with the with the VC, two sound carriers
at 33.4 MHz, respectively 33.158 MHz appear.
33.4 MHz 38.9 MHz
IF Output
38.9 MHz
Internally
Generated
5.5 MHz
Intercarrier
Input
VID/A Sub-C FM + NICAM Combined with a FM modulated subcarrier, another carrier of
5.85 MHz (Nicam) will also be connected. Mixed with the
vision carrier of 38.9 MHz two audio subcarriers of 33.4 and
34.05 will be achieved.
5.5 MHz
5.85 MHz
Intercarrier
Input
38.9 MHz
Internally
Generated
33.4 MHz 38.9 MHz33.05 MHz
IF Output
VID/A Sub-C NIC + BB AUD Only the NICAM audio subcarrier of 5.85 MHz will be con-
nected externally, as second subcarrier the internal 33.4 MHz
carrier is used. At the output, again two carriers will be found:
one at 33.05 MHz and another at 33.4 MHz.
33.4 MHz 38.9 MHz
Internally
Generated
5.85 MHz
Intercarrier
Input
33.4 MHz 38.9 MHz33.05 MHz
IF Output
•
Confirm with ENTER.
• To align the audio subcarrier gain with the internal vision carrier: see chapter 6 : Alignment.