R&S PR100 User Manual
level are
included
OPTIONAL_HEADER 0x8000
0000
N.A. “OPTional” Optional
header is
included
Note:
The Selector flag “FREQuency:LOW:RX” and “FREQuency:RX” are the same.
The “FREQuency:RX” flag is compatible with the older receivers and supports
frequencies < 4 GHz.
Since the PR100 frequency range is > 4 GHz a new flag
FREQuency:HIGH:RX is introduced.
Backwards compatibility is realized by adding the higher 32 bits of a frequency
at the end of the optional header.
Empty packets (also those with an optional header but without data) are not
transmitted.
For packets that contain scan data (for FSCan, MSCan, and PSCan), the end
of a sweep (scan) is marked: The last item in a scan is always followed by an
end-marker. This end-marker is another item with unrealistic values:
Table 21, End Markers
Data Type Value Unit
LEVEL 2000 dBVV
OFFSET 10 000 000 Hz
FSTRENGTH 32 767 dBVV/m
CHANNEL 0
FREQ_LOW 0 Hz
FREQ_HIGH 0 Hz
Note that the end-marker is counted in the header field <trace number of
items>. E.g.: An FSCan from 100 MHz to 110 MHz with a 1 MHz step width
outputs 12 items: 11 measured items and 1 end-marker.
12.2 Audio
The audio stream is only active if SYST:AUD:REM:MODE has been set to
anything else but 0 (zero). It is further determined by two parameters:
• Audio mode: determines the data-rate and the format of the audio
samples
• Audio demodulation: determines the demodulation used to obtain the
audio samples, e.g. AM or FM
The applicable selector flags (see Table 20) are “OPTIONAL_HEADER” and
“SWAP”.
The header field <trace number of items> is the number of frames (see Table
25) in a packet.
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