Barracuda Networks SP4 Instrukcja Użytkownika Pobierz pdf (Strona 93)

TECHNICAL SPEC

ENG

Axel Technology srl

www.axeltechnology.com

AUX IN (1 AND 2)

Connector Type

floating BNC, EMI suppressed

Pass-through Level

-40dB

+ 20 dB trimmer adj. max 24 Vpp input

Frequency response

30 Hz

80 KHz +/- 0.1 dB

Distortion

< 0.03 %

Input Impedance

> 10 Kohm

Purpose

MPX and SCA (RDS) Inputs –

Injection of a MPX Signal Routed

directly to Mpx Out (Split Option)

SYNC-OUT

Connector Type

floating BNC, EMI suppressed

Purpose

TTL-level (5Vpp) 19 kHz Pilot Ref. Out for synchronizing external

RDS coders.

Sync Out phase error

2 degrees (maximum)

MPX, RDS & MPX+RDS OUTPUTS

Output Connectors

Two BNC, floating over chassis ground, EMI suppressed

Load Impedance

600 Ohm or greater

Source impedance

10 Ohm

D/A Conversion

Burr Brown PCM1704

Maximum Load Capacitance

5nF

External MPX summation

With external MPX injected into Aux 1 (Aux 2 if selected by jumper)

Composite output level

- 9.0dBm to +15.0 dBm (0.1 dBm step)

ANALOG AUDIO INPUT

Connectors

Two EMI-suppressed XLR female.

Input Configuration

Stereo.

Input impedance

600 / 10K ohms electronically balanced, jumper selectable

Nominal Input Level (sensistivity)

Software adjustable from –-9dBm to +15.0 dBm

Level Range

–21.0dBu

+ 24.0dBu

Max Input Level

+ 24dBu

A/D Conversion

Crystal Semiconductor CS4224, 24 bit /48 Khz delta sigma converter.

Input CMRR

>60dB (20Hz-20kHz)

Headroom

10 dB (default) / 20 dB (Full Range Mode)

DIGITAL AUDIO INPUT

Connector Type

XLR female & optical tos/link. XLR transformer balanced & floating.

110 Ohm impedance

Input Configuration

Stereo.

Formats

AES3/EBU & Spdif

Input Rates

32/44.1/48/64/88.2/96KHz with automatic selection and jitter

correction

Nominal Level adj (sensitivity)

From 0.0dBFs to –24dBFs (0.1dBu Step)

Level Range

0.0 dBFs

-36dBFs

Dynamic Range (Rate Converter)

124dB (32Khz) – 126dB (44.1Khz) 126dB (48Khz) - 122dB (96Khz)

Resolution

16 / 24 bit

AUDIO LIMITER

Purposes

- Overcoming errors and distortions which usually appear as

undesired peaks (as high as 100 or more KHz of deviation, assuming

75 KHz mean value) on input audio program.

- Control of sudden level changes on input program (up to 3 dB)

- Compensation for slow input audio level changes (fading)

- Increasing of output MPX density

- Application of a smooth (logarithmic) clipping process to incoming

audio to reduce out-of-band noise and therefore improve Rds and Aux

signals quality

Limiter stage sources

Audio limiter applies to both analog and digital input sources.

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