4 SBF Reference
BBSamples
Number:
4040
"OnChange"
interval: block generated each time new baseband samples
are ready (typically at 2Hz)
The
BBSamples
block contains a series of successive complex baseband samples. These
samples can be used for signal monitoring and for spectral analysis of the GNSS bands sup-
ported by the receiver.
Parameter
Type Units
Do-Not-Use
Description
Sync1
c1
Block Header, see 4.1.1
Sync2
c1
u2
ID
u2
Length
u2
1
byte
u4
0.001
s
4294967295
External time stamp, see 4.1.3
u2
1
week
65535
N
u2
Number of complex baseband samples contained in this block
Info
u1
Bit field as follows:
Bits 0-2: Antenna ID: antenna from which the samples have been taken:
0 for main, 1 for
Aux1
and 2 for
Aux2
.
Bits 3-7: Reserved
Reserved
u1[3]
Reserved for future use, to be ignored by decoding software.
SampleFreq
u4
1
Hz
Sampling frequency in Hz.
LOFreq
u4
1
Hz
Frequency of the local oscillator (LO) used to down-convert the RF signal
to baseband.
Samples
u2[N]
N successive complex baseband samples (I+jQ), coded as follows:
Bits 0-7: 8-bit Q component, two’s complement.
Bits 8-15: 8-bit I component, two’s complement.
Padding
u1[..]
Padding bytes, see 4.1.5
480
Содержание PolaRx5TR
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