TDA5630BT Datasheet, PDF (9/24 Pages) NXP Semiconductors – 9 V VHF and UHF mixer/oscillator for TV and VCR cable tuners

Philips Semiconductors
9 V VHF and UHF mixer/oscillator for TV
and VCR cable tuners
Product specification
TDA5630BT
handbook, full pagewidth
NOISE
SOURCE
BNC
RIM
INPUT
CIRCUIT
(see Fig. 5)
AIN IFOUT1
D.U.T.
GND IFOUT2
TR
NOISE
METER
2x5
turns
2
turns
N1/N2 = 5
MBH046
(1) NF = NF_meas − loss (input circuit) dB.
Fig.5 Noise figure measurement in band A.
handbook, full pagewidth ^unwanted
signal
50 Ω source
AC
AM = 30%
eu
1 kHz
HYBRID
50 Ω
BD
wanted
ew
signal
source
AIN IFOUT1
D.U.T.
Vo
2x5
turns
FILTER
18 dB
attenuator
38.9 MHz
2
V ^Vmeas
turns
modulation
analyzer
50 Ω
GND IFOUT2
50
Ω
N1/N2 = 5 RMS
voltmeter
MBH047
V_meas = V_o − 15.4 dB (transformer ratio N1/N2 = 5 and transformer loss).
Wanted output signal at f_RFW = 300 MHz: V_ow =104 dBµV (V_meas = 88.6 dBµV).
We measure the level of the unwanted signal V_ou causing 0.3% AM modulation in the wanted output signal; f_RFU = 305.5 MHz.
V_ou = V_meas + 15.4 dB.
f_osc = 338.9 MHz.
Filter characteristics: f_c = 38.9 MHz; f_−3dBBW = 1.2 MHz; f_−30dBBW = 2.64 MHz.
Fig.6 Cross modulation measurement in band A.
1996 Jun 06
9