Semiconductor Group

22

TDA 5930-5

Characteristics (cont’d)

Alignment Instructions

At a video carrier input level of

of

obtained at the positive video output. Any suitable video test signal can be used for modulation. The

AGC voltage

when fine-aligning the demodulator tank circuit. The alignment is not critical due to relatively large

bandwidth of the demodulator tank circuit. Fine-tuning to intercarrier

pulse characteristics is possible.

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Design Notes (no 100 % final test) (cont’d)

Temperature drift of the tuner

AGC threshold referred to the

input voltage

2dB

caused by the

self-heating of the

ICs 10 s to 15 min.

Ratio pulse bar tilt

to sync. amplitude

4%

Reaction time of white level

peak setting, L standard

10

µs

low-pass filter in

regulation slope

ca. 300 kHz