TDA5632 Philips Semiconductors, TDA5632 Datasheet - Page 9

• Manufacturer Part Number: TDA5632
• Description: 9 V VHF and UHF mixers/oscillators for TV and VCR cable tuners
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1996 Aug 16
handbook, full pagewidth
handbook, full pagewidth
9 V VHF and UHF mixers/oscillators for TV
and VCR cable tuners
Wanted input signal = 80 dB V; Z
V
Measurement at 57.5 MHz: f
Measurement at 357.5 MHz: f
V
V
oA(IF)
in
out
= V
= V'
= unwanted output signal V
meas
meas
loss of the hybrid; (V
50
------------------ -
50
+
e
signal
source
27
e w
e u
; voltage gain for band C = 20 log
50
50
50
wanted
V
wanted
meas
input signal
input signal
unwanted
wanted
source
source
i
out
in
= 55.25 MHz (80 dB V), f
>> 50
= 355.25 MHz (80 dB V), f
= 70 dB V); loss of the hybrid = 1 dB;
when the output wanted signal is modulated with 0.3% AM.
voltmeter
V
RMS
50
A
B
wanted input signal = 2V
HYBRID
50
Fig.6 Band A 1% cross modulation.
Fig.7 Band C gain measurement.
C
D
V
---------- -
V
out
unwanted
in
A
B
unwanted
.
50
HYBRID
V
meas
= 59.75 MHz 30% modulated with 100 kHz, f
= 359.75 MHz 30% modulated with 100 kHz, f
wanted
signal
meas
C
D
input
9
; unwanted input signal modulated with 30% AM;
V
V in
C IN
C IN
voltmeter
50
A IN
A IN
RMS
D.U.T.
D.U.T.
MBH332
out
MBH331
IF
out
IF
V
TDA5632; TDA5633
out
V
V'
osc
out
27
meas
modulation analyzer
(unwanted AM on
the output wanted
frequency)
= 101 MHz.
osc
27
50
= 401 MHz.
spectrum
analyzer
Product specification
50