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參數(shù)資料
| 型號： | 935263938118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 調(diào)諧器 |
| 英文描述： | 2-BAND, VIDEO TUNER, PDSO28 |
| 封裝： | PLASTIC, SOT-341, SSOP-28 |
| 文件頁數(shù)： | 14/48頁 |
| 文件大?。?/td> | 242K |
| 代理商： | 935263938118 |
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2000 Aug 02
21
Philips Semiconductors
Product specication
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
TDA6502; TDA6502A;
TDA6503; TDA6503A
6. Switch-on drift is defined as the change in oscillator frequency between 5 s and 15 min after switch-on. The oscillator
is free running during this measurement.
7. The ripple susceptibility is measured for a 500 kHz ripple at the IF output using the measurement circuit of Fig.19;
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.
8. This is the level of divider interferences close to the IF frequency. For example channel C: fOSC = 179 MHz,
1
4 fOSC = 44.75 MHz. The VHFIN input must be left open (i.e. not connected to any load or cable); The UHFIN1 and
UHFIN2 inputs are connected to a hybrid.
9. Crystal oscillator interference means the 4 MHz sidebands caused by the crystal oscillator. The rejection has to be
greater than 60 dB for an IF output signal of 100 dB
V.
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 fRF(pix) +fRF(snd) fOSC of channel 6 at 42 MHz. This measurement is
done using the TDA6502 (respectively TDA6503) Philips demoboard number 9058_1 (respectively 9059_1).
12. Channel A-5 beat is the interfering product of fRF(pix), fIF and fOSC of channel A-5: fbeat = 45.5 MHz.
The possible mechanisms are: fOSC 2 × fIF or 2 × fRF(pix) fOSC. For the measurement: VRF =80dBV. This
measurement is done using the TDA6502 (respectively TDA6503) Philips demoboard number 9058_1
(respectively 9059_1).
handbook, full pagewidth
FCE528
0.2
2
1
0.5
10
5
0.2
2
1
0.5
10
5
0
+ j
j
0.2
0.5
1
2
5
10
40 MHz
400 MHz
∞
Fig.7 Input admittance (S11) of the VHF mixer input (40 to 400 MHz); Y0 = 20 mS.
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