Technical description
Signal processing
Signal inputs
P1 features 10 XLR connectors capable of receiving up to 12 input signals: four microphones, four analog lines, four
AES/EBU signals (transported in pairs).
In addition, eight channels may be retrieved from an AVB stream at 48 kHz or 96 kHz, connected by one of the two 1
Gb/s Ethernet ports.
Analog line
P1 can receive four balanced analog line signals using the four analog input connectors on the rear panel. The maximum
input signal level is +22 dBu.
Each connector is an ESD protected female XLR3.
To be processed by the DSP, the analog signal is converted into a digital signal. For this purpose, P1 is tted with an A/D
converter operating at 32-bit/96 kHz.
AES/EBU
P1 can receive four AES/EBU digital audio signals (transported in pairs) using the two AES/EBU input connectors on the
rear panel.
Each connector is an ESD protected female XLR3.
Each AES/EBU input port is equipped with a Sample Rate Converter (SRC) selected to support a wide range of input
formats (16, 18, 20 or 24 bits / 44.1, 48, 88.2, 96, 176.4 or 192 kHz). It converts them to the 24 bits / 96 kHz
internal format. The SRC is a high-quality hardware component (140 dB dynamic range, < -120 dBfs THD+N, strong
input jitter attenuation) and provides constant propagation delay regardless of the input sampling frequency. There is no
external synchronization mode. The processor clock runs either using its high-precision internal quartz at 96 kHz, or on
the clock of the connected AVB input stream.
AVB
P1 retrieves up to up to eight channels from a single AVB stream.
Each connector uses a high speed data transfer protocol up to 1 Gb/s and supports the IEC 61883-6 AM824 and AAF
PCM32 stream formats with stream frequencies of 48 kHz or 96 kHz.
P1 operates as an AVB bridge and may therefore be used to create an AVB network.
Microphone
P1 can receive four analog mic/line signals using the four MIC input connectors on the front panel. The maximum input
signal level is +22 dBu (at 0 dB gain). Gain range is 0 dB to 60 dB.
Each connector is an ESD protected female XLR3.
Other
P1 features two USB 2.0 host connectors and a General Purpose I/O (GPIO) female DB9 connector connector.
The two USB 2.0 host connectors can be used to connect the P1 Sensor for temperature and humidity measurement, or a
USB storage device.
If a connected device draws more than 500 mA / 5 V, both USB ports stop working.
Do not charge phones on P1.
If the USB ports stop working, disconnect the device and power cycle P1.
Measurement and tuning
P1 is the measurement platform for LA Network Manager 3.0, using the four MIC input connectors for multi-microphone
measurement and the USB P1 Sensor for temperature and humidity acquisition.
Refer to the LA Network Manager Help for detailed instructions.
P1 user manual (EN) version 2.1
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