Analogue audio performance, Digital audio outputs, Internal decoder – TANDBERG TT1260 User Manual

Page 101: B.4 internal decoder, B.3.10 analogue audio performance, B.3.11 digital audio outputs

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Technical Specification

Instruction Manual: TT1260 Standard Definition Professional Receiver/Decoder

Page B-9

ST.TM.E10100.1

B.3.10 Analogue Audio Performance

Table B.8: Analogue Audio Performance

Parameter

Performance

Voltage gain adjustment

± 1 dBm

Maximum undistorted output (terminated with 600

W) 21 dBm

Crosstalk

50 to 100 Hz: >80 dB
100 to 15 000 Hz: >60 dB

Frequency response

50 to 16 000 Hz:

±0.5 dB

Total harmonic distortion (THD), terminated in 600

W

<0.5%

Signal-to-noise ratio (referenced to 1 kHz tone at
+9 dBm out)

³ 70 dB

Audio Reference Level

-9 dBm

B.3.11 Digital Audio Outputs

Digital audio outputs comply with E1A-422

3

and have a maximum data

rate of 3.072 Mbit/s.
Digital audio is output on 2 x 9 Ways D-type connectors.

B.4

Internal Decoder

The TT1260 contains an internal Decoder. A packet demultiplexer selects

audio, video and ancillary services from the stream received from the

digital demodulator. A service filter reduces the incoming data rate

(max 160 Mbit/s) to that suitable for demuxing/decryption. The Decoder

supports decoding of compressed video at rates of up to and including

50 Mbit/s.

Table B.9: Maximum User Bit-rates

Modulation

FEC

R188max (Mbit/s)

QPSK

1/2

41.470588

QPSK

2/3

55.294118

QPSK

3/4

62.205882

QPSK

5/6

69.117647

QPSK

7/8

72.000000

8PSK

2/3

82.941176

8PSK

5/6

103.676471

8PSK

8/9

110.000000

16QAM

3/4

110.000000

16QAM

7/8

110.000000

ASI

160

3

EIA-422-A-1978: Electrical characteristics of balanced voltage digital interface circuits.

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