LDI DIGISONDE 4D - Page 231

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DIGISONDE-4D
SYSTEM MANUAL
VERSION 1.2.11
5-34 SECTION 5 - SYSTEM SOFTWARE – ANNEX A
Byte
Offset
Byte
Len
Mnemonic
Description
Units
Type
Range
26
1
A
Antenna option (bit mask of enabled antennas)
Bit 0 = antenna 1
Bit 1 = antenna 2
Bit 2 = antenna 3
Bit 3 = antenna 4
-
INT8U
0…15
27
1
POL
Polarizations
0 = O and X
1 = O only
2 = X only
-
INT8U
0, 1, 2
28
1
N
Number of Integrated Repeats
(excluding code pairs and polarizations)
2
N
INT8U
3...7
29
1
IPP
Inter-Pulse Period
5ms
INT8U
30
2
START_RANGE
Start Range
1.25
km
INT16U
0...1023
32
2
END_RANGE
End Range
1.25
km
INT16U
0...1023
34
1
RANGE_STEP
Range Step
1.25
km
INT8U
2
35
1
CG
Constant Gain
In OP_OPTION = Measurement
0 = full gain, Tracker (9) and Antenna Switch (0)
1 = -9 dB in Tracker (9) and Antenna Switch (-9)
2 = -9 dB in Tracker (0) and Antenna Switch (0)
3 = -18 dB in Tracker (0) and Antenna Switch (-9)
In OP_OPTION = Internal loopback
0 = Full gain, Cal Hi, Tracker (9) and Antenna Switch (0)
1 = -9 dB, Cal Hi, Tracker (9) and Antenna Switch (-9)
2 = -18 dB, Cal Hi, Tracker (0) and Antenna Switch (-9)
3 = -35 dB, Cal Hi, Tracker (0) and Antenna Switch (-26)
4 = -9 dB, Cal Hi, Tracker (0) and Antenna Switch (0)
5 = -26 dB, Cal Hi, Tracker (9) and Antenna Switch (-26)
6 = Full gain, Cal Lo, Tracker (9) and Antenna Switch (0)
7 = -9 dB, Cal Lo, Tracker (9) and Antenna Switch (-9)
8 = -18 dB, Cal Lo, Tracker (0) and Antenna Switch (-9)
9 = -35 dB, Cal Lo, Tracker (0) and Antenna Switch (-26)
10 = -9 dB, Cal Lo, Tracker (0) and Antenna Switch (0)
11 = -26 dB, Cal Lo, Tracker (9) and Antenna Switch (-26)
-
INT8U
0..3
for Meas-
urement
0..11
for Internal
loopback
36
1
RX_G
Rx Gain
0 = +30 dB
1 = +24 dB
2 = +18 dB
3 = +12 dB
4 = +6 dB
5 = 0 dB
6 = -6 dB
7 = -12 dB
6 dB
INT8U
0..7
37
1
AGC
Automatic gain control
0 = fixed gain
1 = create gain table before sounding program and use it
2 = use existed gain table
3 = use trial pulses on each frequency
-
INT8U
0, 1,2
38
1
AUTO_DRIFT
Auto-Drift frequency commanding
0 – disabled
1 – enabled
If enabled:
Frequency Stepping Law must be – 2 (Fixed Frequency)
See also: Auto-drift Message Packet
-
INT8U
0, 1