tda6500 NXP Semiconductors, tda6500 Datasheet - Page 30

• Manufacturer Part Number: tda6500
• Description: 5 V Mixer/oscillator And Synthesizer For Pal And Ntsc Standards
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 15057
Product data sheet
Fig 15. Cross modulation measurement in mid and high bands
e
e
w
u
V
Wanted output signal at f
Unwanted output signal at f
The level of unwanted signal is measured by causing 0.09 % AM modulation in the wanted signal.
PAL: IF = 38.9 MHz; L = 680 nH; C = 25.9 pF and attenuation = 10.2 dB
50
50
o
= V
meas
AM = 30%
unwanted
wanted
source
source
2 kHz
signal
signal
------------------------------- -
50
2
A
B
50
Fig 16. Maximum RF input level without lock-out in mid and high bands
HYBRID
+
L
2 2
e
RFpix
C
D
RFpix
= V
Loss in hybrid = 1 dB.
V
PAL: IF = 38.9 MHz; L = 680 nH; C = 25.9 pF
50
; V
i
50
= V
meas
o
+ 5.5 MHz.
= 100 dB V.
meas
+ attenuation
50
source
V
signal
meas
A
B
loss.
HYBRID
5 V mixer/oscillator and synthesizer for PAL and NTSC standards
voltmeter
V
RMS
Rev. 02 — 14 June 2005
C
D
50
50
MHBIN1
MHBIN2
V
i
DUT
A
B
HYBRID
IFOUT
C
D
TDA6500; TDA6501
MHBIN1
MHBIN2
V
o
DUT
C
IFOUT
L
voltmeter
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
RMS
V V
attenuator
meas
12 dB
C
(PAL & OFDM)
L
38.9 MHz
FILTER
spectrum
analyzer
50
fce829
fce220
30 of 37
50