P e r f or m a nc e S pe c i f i c a t i on s

ISL837030, ISL83740

10

FN8013.5

Demodulator Performance Specifications

6.6Mbaud, as shown in FIGURE 4.

FIGURE 4 Acquisition/Tracking Range at Low Baud Rates

BER Performance (Typical)

conditions at baud rates > 10Mbaud as defined in Demodulator Input Requirements on page 9. All loop

bandwidths are set by default to accommodate severe multipath distortions. Performance can be increased

significantly by adjusting loop bandwidths for a less severe environment. Performance is 0.5dB to 1dB better when

using the Evaluation Platform’s high performance L-band interface.

ITEM

DESCRIPTION

Programmable from 50kHz to 400kHz in increments of 1kHz. For

details, see the Programmer’s Reference AN9935.

100

150

200

250

300

350

400

450

345

67

8

Symbol Rate (MBaud)

64QAM and

128QAM available

in ISL83740 only.

PARAMETERS

Eb/No

CONDITIONS

BER

MODULATION

TYPE

INNER

CODE RATE

1.0E-8 BER

QPSK

1

8.1dB

• Standard setup using low-cost VHF IF

8PSK,

1

11.6dB

16QAM

1

12.2dB

32QAM

1

14.8dB

64QAM

1

18.7dB

1.0E-10 BER

16QAM

3/4

7.8dB

7/8

9.0dB

32QAM

4/5

9.7dB

9/10

11.4dB

64QAM

5/6

12.7dB

11/12

15.0dB

128QAM

6/7

17.2dB

Residual BER,

FEC disabled

32QAM

1

BER < 1.0E-11 • Standard setup using low-cost VHF IF

• No added noise

0

• Baseband loopback, no noise