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Table 2), Figure 9 – DekTec DTM-3237 DVB-S2 Receiver User Manual

Page 37

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DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

User Manual

37

Figure 9: Read frequency reply

The reply consists of the following bytes:

Address and I

2

C read-bit (0x60 and ‘1’)

Category byte (0x90)

Setting byte (0x03)

Read byte (0x01)

Four frequency bytes (decimal 950.000.000 or hexadecimal 38.9F.D9.80)

Checksum (0xDC, see Table 2)

Table 2: Checksum computation

Command

Reply

Address

0x60

0x60

Category

0x90

0x90

Setting

0x03

0x03

R/W

1

1

Index (byte 1)

0x00

0x00

Index (byte 2)

0x00

0x00

Data byte 3

-

0x38

Data byte 2

-

0x9F

Data byte 1

-

0xD9

Data byte 0

-

0x80

Sum:

0xF4

0x324

Checksum:

0x0C

0xDC