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T2M › Broadcast/Codec › DVB S2/S Satellite Tuner SoC White Box IP

DVB S2/S Satellite Tuner SoC White Box IP

Description

This satellite tuner is a direct-conversion (zero IF) receiver for digital TV Broadcasting. On the RF input, there is a variable gain, low-noise amplifier (VGLNA). The RF gain is monitored by an automatic gain control (AGC) circuit to ensure an optimal signal level for the two mixers. Each mixer, which down-converts the signal to the baseband, is followed by an AGCcontrolled VGA, a low-pass filter and a second VGA. The local oscillator (LO) signals are provided by an integrated fractional-N phase locked loop (PLL), which contains an on-chip voltage-controlled oscillator (VCO) meeting stringent phase noise requirements. The PLL loop filter is partly integrated. The LO frequencies are programmable between 950 MHz and 2150 MHz. The comparison frequency for the phase-frequency detector (PFD) is generated by dividing the crystal oscillator reference frequency. The crystal frequency may be within the range 15 MHz to 31 MHz depending on the application.

Features
  • High volume production proven in leading STBs
  • RF-to-Baseband direct conversion architecture
  • Single 3.3-V DC supply, low consumption
  • Outstanding performance in heavily loaded spectrum conditions
  • Input frequency range: 950 to 2150 MHz
  • Supports 1 to 60 Msymb/s using internal filter
  • Specific operating mode for symbol rates up to 220 Msymb/s
  • RF-AGC or channel-AGC support
  • Extremely low-phase noise, compliant with DVB-S2 requirements using fractional-N Synthesizer
  • Low external component count
  • Flexible crystal frequency output to drive the demodulator and/or other tuner ICs
  • Continuously variable gain
  • Programmable 6 to 50 MHz cut-off frequency (Butterworth 5th-order baseband filters)
  • Compatible with 5-V and 3.3-V I2C bus

Deliverables

  • White Box IP – source Code delivery
  • RTL source code
  • Software source code
  • Technical documents
  • Test vectors and simulation model
  • Host emulation test environment
  • Porting & Integration support

Benefits

  • Direct broadcasting satellite (DBS), satellite modems: BPSK, QPSK, 8PSK, 16/32 APSK modulations
  • Input frequency range: 950 to 2150 MHz
  • Extremely low-phase noise, compliant with DVB-S1 and DVB-S2
  • Set-top boxes, PCTV and iDTV
  • Outdoor units
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