Table 2), Figure 9 – DekTec DTM-3237 DVB-S2 Receiver User Manual
Page 37

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