tda6503a NXP Semiconductors, tda6503a Datasheet - Page 21

• Manufacturer Part Number: tda6503a
• Description: 5 V Mixers/oscillators And Synthesizers For Cable Tv And Vcr 2-band Tuners
• Manufacturer: NXP Semiconductors

Philips Semiconductors
6. Switch-on drift is defined as the change in oscillator frequency between 5 s and 15 min after switch-on. The oscillator
7. The ripple susceptibility is measured for a 500 kHz ripple at the IF output using the measurement circuit of Fig.19;
8. This is the level of divider interferences close to the IF frequency. For example channel C: f
9. Crystal oscillator interference means the 4 MHz sidebands caused by the crystal oscillator. The rejection has to be
10. The reference frequency rejection is the level of reference frequency sidebands related to the sound subcarrier.
11. Channel 6 beat is the interfering product of f
12. Channel A-5 beat is the interfering product of f
2001 Aug 22
handbook, full pagewidth
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
is free running during this measurement.
the level of the ripple signal is increased until a difference of 53.5 dB occurs between the IF carrier fixed at 100 dB V
and the sideband components.
1
UHFIN2 inputs are connected to a hybrid.
greater than 60 dB for an IF output signal of 100 dB V.
done using the TDA6502 (respectively TDA6503) Philips demoboard number 9058_1 (respectively 9059_1).
The possible mechanisms are: f
measurement is done using the TDA6502 (respectively TDA6503) Philips demoboard number 9058_1
(respectively 9059_1).
4
f
OSC
= 44.75 MHz. The VHFIN input must be left open (i.e. not connected to any load or cable); The UHFIN1 and
Fig.7 Input admittance (S
10
10
5
5
OSC
10
2
2
5
2
11
f
) of the VHF mixer input (40 to 400 MHz); Y
IF
RF(pix)
or 2
RF(pix),
2
+ f
f
RF(pix)
RF(snd)
f
IF
21
1
1
1
and f
f
OSC
OSC
f
OSC
0.5
. For the measurement: V
of channel A-5: f
of channel 6 at 42 MHz. This measurement is
0.2
0.5
0.5
400 MHz
40 MHz
FCE528
TDA6502; TDA6502A;
TDA6503; TDA6503A
0.2
0.2
beat
0
= 45.5 MHz.
0
j
j
= 20 mS.
RF
OSC
= 80 dB V. This
Product specification
= 179 MHz,