7

SL6679

RECEIVER CHARACTERISTICS (450MHz)

Receiver Characteristics (450MHz) are guaranteed over the following range of operating conditions unless otherwise stated.

Characteristics are not tested but are guaranteed by characterisation test or design. All measurements made using the

characterisation circuit Fig. 5. See Application Note AN137 for details of test method.

BER = 1 in 30, AFC open loop. LNA gain set such that an RF signal of273dBm at the LNA input, offset from the LO

by 4kHz, gives a typical IF signal level of 300mV p-p at TPI and TPQ. LNA noise figure,2dB

Characteristic

512bps, Df = 4·5kHz

1200bps, Df = 4·0kHz

2400bps, Df = 4·5kHz. LO = 215dBm

512bps, Df = 4·5kHz

1200bps, Df = 4·0kHz

2400bps, Df = 4·5kHz. LO = 215dBm. Channel

spacing 25kHz

512bps, Df = 4·5kHz

1200bps, Df = 4·0kHz

2400bps, Df = 4·5kHz. LO = 215dBm. Channel

spacing 25kHz

512bps, Df = 4·5kHz, no AFC

512bps, Df = 4·5kHz, no AFC

1200bps, Df = 4·0kHz, no AFC

1200bps, Df = 4·0kHz, no AFC

2400bps, Df = 4·5kHz, no AFC

2400bps, Df = 4·5kHz, no AFC

512bps, Df = 4·5kHz, no AFC

1200bps, Df = 4·0kHz, no AFC

2400bps, Df = 4·5kHz, no AFC

512bps, Df = 4·5kHz. All at sensitivity 13dB or above

1200bps, Df = 4·0kHz. All at sensitivity 13dB or above

2400bps, Df = 4·5kHz. All at sensitivity 13dB or above

Conditions

Sensitivity

Intermodulation, IP3

Adjacent Channel

Deviation Acceptance

Up

Down

Up

Down

Up

Down

Centre Frequency Acceptance

AFC Capture Range (AFC

Closed Loop)

Value

Typ.

Min.

2128

2126

2123

57

55

53

70

69

66

11·9

22·5

13·0

22·3

12·5

22·3

62·8

62·5

62·5

64

63·5

64

50

48

62·5

60

11·8

22·7

11·7

23

62·0

62·0

Max.

dBm

dBm

dBm

dB

dB

dB

dB

dB

dB

kHz

kHz

kHz

kHz

kHz

kHz

kHz

kHz

kHz

kHz

kHz

kHz

Units

2122

2119

14·6

21·7

14·6

21·7

62·9

63·2