TDA5632 Datasheet, PDF (9/20 Pages) NXP Semiconductors – 9 V VHF and UHF mixers/oscillators for TV and VCR cable tuners

Philips Semiconductors
9 V VHF and UHF mixers/oscillators for TV
and VCR cable tuners
Product specification
TDA5632; TDA5633
handbook, full pagewidth
Vmeas V
wanted
input signal
50 Ω source
ew
unwanted
input signal
50 Ω source
eu
A
C
HYBRID
B
D
wanted
input
signal
50 Ω
50 Ω
RMS
voltmeter
A IN
IF
out
D.U.T.
A IN
MBH331
27 Ω
Vout _{50 Ω}
modulation analyzer
(unwanted AM on
the output wanted
frequency)
Wanted input signal = 80 dBµV; Z_i >> 50 Ω = > wanted input signal = 2V_meas; unwanted input signal modulated with 30% AM;
V_oA(IF) = unwanted output signal V_out when the output wanted signal is modulated with 0.3% AM.
Measurement at 57.5 MHz: f_wanted = 55.25 MHz (80 dBµV), f_unwanted = 59.75 MHz 30% modulated with 100 kHz, f_osc = 101 MHz.
Measurement at 357.5 MHz: f_wanted = 355.25 MHz (80 dBµV), f_unwanted = 359.75 MHz 30% modulated with 100 kHz, f_osc = 401 MHz.
Fig.6 Band A 1% cross modulation.
handbook, full pagewidth ^signal
source
50 Ω
e
Vmeas _V
50 Ω
RMS _{50 Ω}
voltmeter
Vin
A
C
C IN
IF
out
HYBRID
D.U.T.
27 Ω
Vout
V' _meas
50 Ω
B
D
C IN
MBH332
spectrum
analyzer
V_in = V_meas − loss of the hybrid; (V_in = 70 dBµV); loss of the hybrid = 1 dB;
V_out = V'_meas × ^{5----0---5--+}-0----2---7-- ; voltage gain for band C = 20 log -V-V---^o-_i--^un--^t .
Fig.7 Band C gain measurement.
1996 Aug 16
9