TDA8261TW Philips Semiconductors, TDA8261TW Datasheet - Page 14

• Manufacturer Part Number: TDA8261TW
• Description: Satellite Zero-IF QPSK/8PSK downconverter with PLL synthesizer
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 9 Test signal conditions for pulling measurements
The level of the wanted and unwanted signal mentioned in the table are measured at the outputs of the RF signal
generators. The sensitivity to pulling is measured in baseband by the difference expressed in dB ( ) between the level
of the wanted signal and the spurious generated by pulling. The ANZAC reference is HH128.
2004 Dec 02
handbook, full pagewidth
3/4LO test
5/4LO test
Satellite Zero-IF QPSK/8PSK
downconverter with PLL synthesizer
SIGNAL
wanted
unwanted
local oscillator
wanted
unwanted
local oscillator
GENERATOR
GENERATOR
RF SIGNAL
RF SIGNAL
handbook, halfpage
Fig.8 Measurement method for pulling sensitivity.
f
f
f
f
f
f
w
uw
lo
w
uw
lo
wanted signal
unwanted signal
= 2161 MHz
= 1761 MHz
= 2150 MHz
= 1750 MHz
= 1613 MHz
= 2188 MHz
FREQUENCY
Fig.9 Base band spectrum.
wanted
signal
11
ANZAC
14
spurious
signal
11.5
10 dBm
2 dBm
10 dBm
2 dBm
V signal
TDA8261TW
f (MHz)
MGU794
LEVEL
SPECTRUM
ANALYSER
MBL860
f
f
f
f
w
uw
w
uw
= f
= f
= f
= f
TDA8261TW
lo
lo
Product specification
lo
lo
+ 11 MHz
+ 11 MHz
REMARK
3/4 + 500 kHz
5/4 + 500 kHz