TDA9550 PHILIPS [NXP Semiconductors], TDA9550 Datasheet - Page 99

• Manufacturer Part Number: TDA9550
• Description: TV signal processor-Teletext decoder with embedded m-Controller
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
10. Measured in accordance with the test line given in Fig.36. For the differential phase test the peak white setting is
11. This figure is valid for the complete video signal amplitude (peak white-to-black), see Fig.37.
12. The noise inverter is only active in the ‘strong signal mode’ (no noise detected in the incoming signal)
13. The test set-up and input conditions are given in Fig.38. The figures are measured with an input signal of
14. Measured at an input signal of 10 mV
15. The time-constant of the IF-AGC is internal and the speed of the AGC can be set via the bits AGC1 and AGC0 in
16. The AFC control voltage is generated by the digital tuning system of the PLL demodulator. This system uses the
17. The reference signal for the I-mixer (frequency 42 or 48 MHz) is internally generated. It is also possible to supply an
18. The weighted S/N ratio is measured under the following conditions:
2000 Jun 22
TV signal processor-Teletext decoder with
embedded -Controller
reduced to 87%.
The differential gain is expressed as a percentage of the difference in peak amplitudes between the largest and
smallest value relative to the subcarrier amplitude at blanking level.
The phase difference is defined as the difference in degrees between the largest and smallest phase angle.
10 mV RMS. This test can only be carried out in a test set-up in which the test options of the IC can be activated.
This because the IF-AGC control input is not available in this IC.
voltage (RMS value). B = 5 MHz. Weighted in accordance with CCIR 567.
subaddress 28H. The AGC response time is also dependent on the acquisition time of the PLL demodulator. The
values given are valid for the ‘norm’ setting (AGC1-AGC0 = 0-1) and when the PLL is in lock.
clock frequency of the -Controller/Teletext decoder as a reference and is therefore very accurate. For this reason
no maximum and minimum values are given for the window sensitivity figures (parameters M.7.2 and M.7.3). The
tuning information is supplied to the tuning system via the AFA and AFB bits in output byte 02H. The AFC value is
valid only when the LOCK-bit is 1.
external reference signal to the mixer. This external mode is activated by means of the IFE bit, the signal has to be
supplied to the pin which is normally used as the reference signal output of the colour decoder (REFO).
a) The vision IF modulator must meet the following specifications:
b) The measurements must be carried out with the Siemens SAW filters G3962 for vision IF and G9350 for sound
c) The PC/SC ratio at the vision IF input is calculated as the addition of the TV transmitter ratio and the SAW filter
Incidental phase modulation for black-to-white jumps less than 0.5 degrees.
QSS AF performance, measured with the television-demodulator AMF2 (audio output, weighted S/N ratio) better
than 60 dB (deviation 27 kHz) for 6 kHz sine wave black-to-white modulation.
Picture-to-sound carrier ratio: PC/SC1 = 13 dB (transmitter).
IF. Input level for sound IF 10 mV
PC/SC ratio. This PC/SC ratio is necessary to achieve the S/N(W) values as indicated.
RMS
RMS
. The S/N is the ratio of black-to-white amplitude to the black level noise
with 27 kHz deviation.
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TDA955X/6X/8X PS/N1 series
Tentative Device Specification