ATA5423 ATMEL Corporation, ATA5423 Datasheet - Page 15

• Manufacturer Part Number: ATA5423
• Manufacturer: ATMEL Corporation

4841A–RKE–02/05
Figure 3-3.
Figure 3-4.
Figure 3-5 on page 16
trate the selectivity and image rejection. This measurement was done 6 dB above the sensitivity
level with a useful signal of 433.92 MHz/FSK/20kBaud/±16 kHz/ Manchester with a level of
-106 dBm + 6 dB = –100 dBm. The figure shows to which extent a continuous wave signal can
surpass –100 dBm until the BER is higher than 10
be 59 dB higher than –100 dBm which is -100 dBm + 59 dB = –41 dBm.
Table 3-6 on page 16
other frequencies. Note that sometimes the blocking is measured relative to the sensitivity level
(dBS) instead of the carrier (dBC).
Narrow Band 3 dB Blocking Characteristic at 433.92 MHz
Wide Band 3 dB Blocking Characteristic at 433.92 MHz
shows the blocking performance measured relative to –100 dBm for some
shows the blocking measurement close to the received frequency to illus-
-10.0
-10.0
60.0
40.0
30.0
20.0
70.0
50.0
80.0
60.0
40.0
30.0
20.0
70.0
50.0
10.0
10.0
0.0
0.0
-50.0
-5.0
Distance of Interfering to Receiving Signal [MHz]
Distance of Interfering to Receiving Signal [MHz]
-40.0
-4.0
ATA5423/25/28/29 [Preliminary]
-30.0
-3.0
-20.0
-2.0
-10.0
-1.0
-3
0.0
0.0
. For example, at 1 MHz the blocker can then
10.0
1.0
20.0
2.0
30.0
3.0
40.0
4.0
50.0
5.0
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