Communication Protocol
7
Table 5: VA-4 Hex Codes for Gain Control (Amplification)
Gain (dB)
LED
Hex Codes
Gain (dB) LED
Hex Codes
0
0
3f 80 81 81 16 81 a6 81
+11.0
45
3f 80 81 81 16 81 d3 81
+0.2
1
3f 80 81 81 16 81 a7 81
+11.3
46
3f 80 81 81 16 81 d4 81
+0.5
2
3f 80 81 81 16 81 a8 81
+11.5
47
3f 80 81 81 16 81 d5 81
+0.7
3
3f 80 81 81 16 81 a9 81
+11.8
48
3f 80 81 81 16 81 d6 81
+1.0
4
3f 80 81 81 16 81 aa 81
+12.0
49
3f 80 81 81 16 81 d7 81
+1.2
5
3f 80 81 81 16 81 ab 81
+12.3
50
3f 80 81 81 16 81 d8 81
+1.5
6
3f 80 81 81 16 81 ac 81
+12.5
51
3f 80 81 81 16 81 d9 81
+1.7
7
3f 80 81 81 16 81 ad 81
+12.7
52
3f 80 81 81 16 81 da 81
+2.0
8
3f 80 81 81 16 81 ae 81
+13.0
53
3f 80 81 81 16 81 db 81
+2.2
9
3f 80 81 81 16 81 af 81
+13.2
54
3f 80 81 81 16 81 dc 81
+2.5
10
3f 80 81 81 16 81 b0 81
+13.5
55
3f 80 81 81 16 81 dd 81
+2.7
11
3f 80 81 81 16 81 b1 81
+13.7
56
3f 80 81 81 16 81 de 81
+2.9
12
3f 80 81 81 16 81 b2 81
+14.0
57
3f 80 81 81 16 81 df 81
+3.2
13
3f 80 81 81 16 81 b3 81
+14.2
58
3f 80 81 81 16 81 e0 81
+3.4
14
3f 80 81 81 16 81 b4 81
+14.5
59
3f 80 81 81 16 81 e1 81
+3.7
15
3f 80 81 81 16 81 b5 81
+14.7
60
3f 80 81 81 16 81 e2 81
+3.9
16
3f 80 81 81 16 81 b6 81
+14.9
61
3f 80 81 81 16 81 e3 81
+4.2
17
3f 80 81 81 16 81 b7 81
+15.2
62
3f 80 81 81 16 81 e4 81
+4.4
18
3f 80 81 81 16 81 b8 81
+15.4
63
3f 80 81 81 16 81 e5 81
+4.7
19
3f 80 81 81 16 81 b9 81
+15.7
64
3f 80 81 81 16 81 e6 81
+4.9
20
3f 80 81 81 16 81 ba 81
+15.9
65
3f 80 81 81 16 81 e7 81
+5.1
21
3f 80 81 81 16 81 bb 81
+16.2
66
3f 80 81 81 16 81 e8 81
+5.4
22
3f 80 81 81 16 81 bc 81
+16.4
67
3f 80 81 81 16 81 e9 81
+5.6
23
3f 80 81 81 16 81 bd 81
+16.7
68
3f 80 81 81 16 81 ea 81
+5.9
24
3f 80 81 81 16 81 be 81
+16.9
69
3f 80 81 81 16 81 eb 81
+6.1
25
3f 80 81 81 16 81 bf 81
+17.2
70
3f 80 81 81 16 81 ec 81
+6.4
26
3f 80 81 81 16 81 c0 81
+17.4
71
3f 80 81 81 16 81 ed 81
+6.6
27
3f 80 81 81 16 81 c1 81
+17.6
72
3f 80 81 81 16 81 ee 81
+6.9
28
3f 80 81 81 16 81 c2 81
+17.9
73
3f 80 81 81 16 81 ef 81
+7.1
29
3f 80 81 81 16 81 c3 81
+18.1
74
3f 80 81 81 16 81 f0 81
+7.4
30
3f 80 81 81 16 81 c4 81
+18.4
75
3f 80 81 81 16 81 f1 81
+7.6
31
3f 80 81 81 16 81 c5 81
+18.6
76
3f 80 81 81 16 81 f2 81
+7.8
32
3f 80 81 81 16 81 c6 81
+18.9
77
3f 80 81 81 16 81 f3 81
+8.1
33
3f 80 81 81 16 81 c7 81
+19.1
78
3f 80 81 81 16 81 f4 81
+8.3
34
3f 80 81 81 16 81 c8 81
+19.4
79
3f 80 81 81 16 81 f5 81
+8.6
35
3f 80 81 81 16 81 c9 81
+19.6
80
3f 80 81 81 16 81 f6 81
+8.8
36
3f 80 81 81 16 81 ca 81
+19.8
81
3f 80 81 81 16 81 f7 81
+9.1
37
3f 80 81 81 16 81 cb 81
+20.1
82
3f 80 81 81 16 81 f8 81
+9.3
38
3f 80 81 81 16 81 cc 81
+20.3
83
3f 80 81 81 16 81 f9 81
+9.6
39
3f 80 81 81 16 81 cd 81
+20.6
84
3f 80 81 81 16 81 fa 81
+9.8
40
3f 80 81 81 16 81 ce 81
+20.8
85
3f 80 81 81 16 81 fb 81
+10.0
41
3f 80 81 81 16 81 cf 81
+21.1
86
3f 80 81 81 16 81 fc 81
+10.3
42
3f 80 81 81 16 81 d0 81
+21.3
87
3f 80 81 81 16 81 fd 81
+10.5
43
3f 80 81 81 16 81 d1 81
+21.6
88
3f 80 81 81 16 81 fe 81
+10.8
44
3f 80 81 81 16 81 d2 81
+21.8
89
3f 80 81 81 16 81 ff 81