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1999 May 31 16
Philips Semiconductors Product specification
Home automation modem TDA5051A
Fig.16 Test set-up for measuring THD and bandwidth of the TX
OUT
signal.
(1) Square wave TTL signal 300 Hz, duty factor = 50% for measuring signal bandwidth (see spectrum Fig.3).
(2) DATA
IN
= LOW for measuring total harmonic distortion (see spectrum Fig.3).
(3) Tuned for f
cr
= 132.5 kHz.
(4) The CISPR16 network provides a −6 dB attenuation.
handbook, full pagewidth
MGK839
DATA
IN
TDA5051A
POWER
SUPPLY
SPECTRUM
ANALYSER
50 Ω
10
7
8
OSC1
OSC2
12, 5, 9
1 13, 3, 11
TX
OUT
AGND, DGND, APGND
V
DDA,
V
DDD,
V
DDAP
5 Ω
5 Ω
50 Ω
10 µF
33 nF
250 nF
250 nF
47 µH
50 µH
50 µH
33 nF
47 µH
coupling
network
(3)
CISPR16
network
(4)
+5 V
(2)(1)