EM510 SYSTem Subsystem
4065.7763.32-01.00 5.106
. :FPDP:REMote:MODE OFF | SHORt | LONG | FLAGs | AMMos
Sets the format of the digital data (panorama, IF or demodulated data) that is output by FPDP. If
command OUTPut:FPDP:MODE has been used to set the format to DEModulator (demodulated
data), the demodulation modes AM, FM, PULS and PM will result in an output of AM instead of I, and of
FM instead of Q.
Parameters:
OFF digital data switched off
SHORt digital data in the format 16 Bit I and 16 Bit Q
LONG digital data in the format 32 Bit I and 32 Bit Q
FLAGs digital data in the format 24 Bit I and 24 Bit Q with status flags
AMMos digital data in the AMMOS format 16 Bit I and 16 Bit Q
In SHORt mode, raw data is output. The format within a 32-bit word is 16 bits I and 16 bits Q. The
signed fractional imaginary part Q is contained in the upper 16-bit word, and the signed fractional real
part I in the lower 16-bit word of the 32-bit word. Due to this combined format, there are no problems
with synchronization.
In LONG mode, raw data is output. The format is 31 bits I and 31 bits Q.
The LSB (least significant bit) is used to identify the real part I (LSB = 1) or the imaginary part Q
(LSB = 0).
In FLAGs mode, a 32-bit word contains the following additional information as flags besides the
complex samples (24 bits I and 24 bits Q).
REAL PART:
<31:8> real part 24 bits signed fractional
<7> always 1 (I-Strobe)
<6> SIGVALID
<5> blanking flag <4> reserved <3:0> running four-bit counter
IMAGINARY PART:
<31:8> imaginary part 24 bits signed fractional
<7> always 0 (Q-Strobe)
<6:0> RxAtt (attenuation to antenna in dB – 50 dB)
Parameter RxAtt may be used to calculate the level at the antenna input.
level_antenna = level_IQ_RMS + RxAtt + 50 dB
In AMMos mode, further information such as the current receive frequency, recording bandwidth,
parameter change flag, level correction value and timestamp is included in the data stream in addition
to the IQ data.
The full data format is specified in "Annex B: Data Stream Format".
*RST state:
SHOR
Example:
SYSTem:FPDP:REMote:MODe SHORT
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