Keysight E6610A, Руководство пользователя и программирования

Страница: 91 / 108

12 SCPI Command Reference
Keysight E6610A User and Programming Guide 91
Result is in dB.
SENSe<1|2>:RADio:FREQuency <value in
kHz> This command will set the center frequency of the
selected RF RX input to the value specified in kHz.
SENSe<1|2>:RADio:FREQuency? Queries the currently configured center frequency
of the selected RF RX input. Result is in kHz.
SENSe<1|2>:RADio:CAPTure:DEPth
<value in ms> Configures the capture depth for the selected RF
RX input.
The value is in ms, with 10 ms being a full LTE
frame.
SENSe<1|2>:RADio:CAPTure:DEPth? Queries the capture depth for the selected RF RX input.
Value is in ms.
SENSe<1|2>:RADio:CAPTure:TRIGger
<value in ms> This command sets the capture trigger delay for
the selected RF RX input. The value entered is in
ms of delay from the start of the airframe.
Increasing the delay will effectively allow more IQ
data samples to have been transmitted before the
capture starts. Therefore, if looking at the IQ
capture plot, a larger delay will make the plot shift
to the left.
SENSe<1|2>:RADio:CAPTure:TRIGger? Queries the capture trigger delay for the selected RF RX
input. Value is in ms.
SENSe<1|2>:RADio:CAPTure:TMODel
TM11|TM31|FRCA3|<file_name> This command selects the waveform that is used as the
reference to demodulate the captured data for the selec-
ted RF RX input. Since the RF RX is measuring the RRH's
Tx output, this waveform should match the waveform
selected for the corresponding CPRI TX. The file name of
a user-defined file may be entered.
SENSe<1|2>:RADio:CAPTure:TMODel? Queries the waveform that is set as the reference for
demodulating the captured data on the selected RF RX
input.
SENSe<1|2>:RADio:CAPTure:DEModtype
OFDM|SCFDMA This command is used when a user-defined custom wave-
form file has been selected, to set the type of demodu-
lation to use on the captured data. For downlink
waveforms, choose OFDM. For uplink waveforms, choose
SCFDMA.
SENSe<1|2>:RADio:CAPTure:STATe ON|
[OFF]|1|0 This command enables or disables the RF capture
for the selected RF RX input. Default state is OFF.
The command does initiate a capture, but it
enables the channel and makes it ready for
capture. The command
SENSe<1|2>:RADio:STATe:ON must also be issued
to turn on the RF input path prior to a capture;
otherwise only the noise floor will be captured. To
initiate a capture use the INITIATE:CAPTURE
command which will capture data for all enabled
channels simultaneously, or one of the MEASURE
commands.