PTX-PRO Specifications A-5
PTX-PRO User and Technical Manual
The PTX-PRO provides a maximum of four audio circuits. Each audio circuit is a 3-wire
balanced circuit capable of carrying one tone or voice signal. An audio circuit can carry one
analog balanced channel or two digital AES/EBU channels.
A.3.3
MPEG Audio input
MPEG audio circuits must be configured in pairs with the
MRC Radio Configurator
software:
•
Audio 1
- LEFT/RIGHT or Digital AES/EBU.
•
Audio 2
- LEFT/RIGHT or Digital AES/EBU.
A.3.4
AES/EBU Audio input
The PTX-PRO only provides digital audio when operating in digital mode.
In digital mode, the PTX-PRO receives a digital signal and routes the data to the MPEG
decoder and then to the COFDM demodulator. The PTX-PRO audio switching circuitry
connects the input
of the MPEG decoder to the
AUDIO
connector.
When configured for digital audio input (AES/EBU), the MPEG decoder provides two paired
channels of digital data (+ and –), or four individual channels. All four circuits are balanced
inputs, with each pair (+ and –) sharing one ground.
A.4 Video Connections
The PTX-PRO provides several video options on the front panel, using 75 Ohm BNC
connectors, as described in the following table and in
Section 1.1,
Front Panel Controls,
Indicators, and Connectors
on page 1-2.
Note
If your PTX-PRO has only 3 BNC connectors on the front panel, your SDI and
ASI share the same connector.
A.5 Data Connections
The PTX-PRO has an
RS-232
data connector on the rear panel for the following purposes:
•
Remote Control using a STRATA RX Remote Control Panel
•
Radio Programming using a PC
•
Wayside Data communication.
Operation Mode
Connector
Signals
Signal Input
NTSC/PAL (525/625) or
70 MHz IF
Monitor
(output)
70 MHz
SDI/SD/HD
(input)
SDI (525/625) or HD-SDI
ASI INPUT
ASI input
Signal
Ground
