Noise Testing Configuration - Texas Instruments 2000 Series Reference Manual

Appendix F
Eliminate noise sources or try special antennas (e.g. noise-balanced antennas).
1. When the configuration of
then the problem is conducted noise.
2. Change the configuration so that the interface lines are again connected to the RFM with the
transmitter still switched off. If the RSTP voltage now indicates bad noise conditions, the conducted
noise is coming via the interface lines.
3. Try to eliminate the noise on the interface lines. See
4. When the configuration above (interface lines connected) shows good noise conditions (RSTP voltage
less than 1.0 VDC), then the problem is conducted noise via the supply lines.
5. Try to eliminate the noise on the supply lines. See
46 Noise Considerations
Figure F-1 shows good noise conditions (RSTP voltage less than 1.0 VDC)
RSTP
J1
VSP 13
VSP 11
10
GNDP 9
7
VSL 3
GND 1
Figure F-1. Noise Testing Configuration
Appendix G, Over Voltage Protection.
Appendix G, Over Voltage Protection.
ANT 2
ANT 1
TI-RFid standard
antenna
RI-ANT-G02
www.ti.com
SCBU022 – November 2002
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