User's Manual

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User Manual
Rev. 2.3 - 26/06/19
PTRL-LCD & RXRL-LCD
ELETTRONICA
• Separation of the mono, MPX and SCA channels.
• Measurement of the demodulating signal
8.5.2 Audio output stage (stereo version)
There are two 15KHz filters for the filtering of both L and R channels, and an
integrated stereo. The other functions are the same as in the mono version.
8.6 Front End
This card receives the RF signal, filters it, amplifies it and mix it in the mixer section
with the signal coming from the VCO/PLL.
The signal obtained comes sended to IF card for successive elaborations.
8.7 VCO/PLL
This card receives the signal which is equivalent to the setted frequency which
comes from the CPU of the panel card.
In order to realize the operations, it is necessary to have a splitter which processes
the information received and sends them back to the PLL stage.
8.8 Telemetry card
This device was designed to give indications to the user concerning the functioning
status of the unit. All the available input and output signals of the unit are indicated
on the DB15 connector.
On the same card there is an “INTERLOCK” BNC, it is closed in output in case of
the RF signal is under the squelch threshold.