R.V.R. Electronica PTRL, Руководство пользователя

Страница: 11 / 48

PTRL & RXRL LCD
7 / 44 User Manual Rev. 1.2 - 31/01/05
4. General description
The PTRL-LCD and the RXRL-LCD are, respectively a broadband radio transmitter
and receiver for the transport of audio signals as an auxiliary to the frequency
modulation sound broadcasting.
This type of equipment is often called STL (Studio-to-Transmitter Link).
The PTRL-LCD is designed to work in an optimum way when connected to the
receiver RXRL-LCD.
Externally, it is a box to mount in a 19" rack, each one being 2HE high.
The standard working frequency bands are the following:
• 220 MHz ÷ 240 MHz (5KHz steps)
• 420 MHz ÷ 440 MHz (5KHz steps)
• 900 MHz ÷ 960 MHz (5KHz steps)
The working frequency (and therefore the band) should be indicated when the order
for such product is placed.
WARNING: upon request, these links are available at other frequency bands and
steps, please contactact RVR in order to check the availability of modules at the
required frequency.
The PTRL-LCD is available with internal stereo coder which can guarantee an
optimum stereophonic separation as well as a low level of armonic distorsion. In
function of your own requirements it can be configurated for the functioning under the
Mono/MPX mode (that is to say when excluding the stereo coder and when using the
"left" inputs as a "mono" input and the BNC, which is always on, as "MPX"). The
configuration can be done by the user with the help of microswitches which can be
selected from the outside. It has also two inputs (SCA1 and SCA2) for signals which
are modulated on sub-carriers by appropriated external coders, normally used in
Europe for the RDS transmission (Radio Data System).
In the standard version of the RXRL-LCD, the demodulated signal is available in the
MPX form (that is to say the complete basis signal band) and in the mono version.
Moreover there are two connectors used for the respective SCA outputs. As an option,
the RXRL-LCD can be equipped with a stereo decoder option. Also when this option
is present, apart from the outputs for the LEFT and RIGHT channels, the outputs for
the MPX signal are present and for the possible sub-carriers.
The important audio characteristics of this equipment are the low distorsion and
intermodulation values and the high S/N level; another important quality both of the
PTRL-LCD and the RXRL-LCD is its very simple construction and its easy use.