ata5428 ATMEL Corporation, ata5428 Datasheet - Page 15

• Manufacturer Part Number: ata5428
• Description: Uhf Ask/fsk Transceiver
• Manufacturer: ATMEL Corporation

4841D–WIRE–10/07
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/20 Kbit/s/±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-
ATA5423/ATA5425/ATA5428/ATA5429
-10
-10
80
70
60
50
40
30
20
10
70
60
50
40
30
20
10
0
0
-50
-5
-40
-4
Distance of Interfering to Receiving Signal (MHz)
Distance of Interfering to Receiving Signal (MHz)
-30
-3
-20
-2
-10
-1
-3
0
0
. For example, at 1 MHz the blocker can then
10
1
20
2
30
3
40
4
50
5
15