ATA8201 datasheet(13/44 Pages) ATMEL

13 / 44 page

4971C–INDCO–04/09

ATA8201/ATA8202

Figure 2-8.

Wide-band 3-dB Blocking Characteristic at 315 MHz

Table 2-8 shows the blocking performance measured relative to –102 dBm for some frequen-

cies. Note that sometimes the blocking is measured relative to the sensitivity level 104 dBm

(denoted dBS), instead of the carrier –102 dBm (denoted dBC).

The ATA8201/ATA8202 can also receive FSK and ASK modulated signals if they are much

higher than the I1dBCP. It can typically receive useful signals at –10 dBm. This is often referred

to as the nonlinear dynamic range (that is, the maximum to minimum receiving signal), and is

95 dB for 10 Kbits/s Manchester (FSK). This value is useful if the transmitter and receiver are

very close to each other.

Table 2-8.

Blocking 3 dB Above Sensitivity Level With BER < 10

–3

Frequency Offset

Blocking Level

Blocking

+1.5 MHz

–44.5 dBm

57.5 dBC, 60.5 dBS

–1.5 MHz

–44.5 dBm

57.5 dBC, 60.5 dBS

+2 MHz

–39.0 dBm

63 dBC, 66 dBS

–2 MHz

–36.0 dBm

66 dBC, 69 dBS

+3 MHz

–34.5 dBm

67.5 dBC, 70.5 dBS

–3 MHz

–34.5 dBm

67.5 dBC, 70.5 dBS

+20 MHz

–28.0 dBm

74 dBC, 77 dBS

–20 MHz

–28.0 dBm

74 dBC, 77 dBS

-10.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

20.0

30.0

40.0

50.0

Distance from Interfering to Receiving Signal (MHz)

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