Operating instructions

R&S ESCI TRACe Subsystem
1166.6004.12 6.225 E-1
TRACe:COPY TRACe:COPY TRACE1| TRACE2| TRACE3|, TRACE1| TRACE2| TRACE3
This command copies data from one trace to another. The second operand describes the source,
the first operand the destination of the data to be copied.The associated measurement window is
selected with the numeric suffix of TRACe<1|2>.
Example: "TRAC:COPY TRACE1,TRACE2"
Characteristics: *RST value:
SCPI: conforming
Mode: R, A
This command is an event and therefore has no query and no *RST value.
TRACe:IQ Subsystem
The commands of this subsystem are used for collection and output of measured IQ data. A special
memory is therefore available in the instrument with 128k words for the I and Q data. The measurement
is always performed in the time domain (span = 0 Hz) at the selected center frequency. The number of
samples to be collected can be set. The sample rate can be set in the range from 15.625 kHz to
32 MHz; if channel filters are used, the sample rate is a function of the filter involved and can be
determined by a separate command depending on the setting. Prior to being stored in memory or output
via GPIB, the measurement data are corrected in terms of frequency response.
Depending on the sample rate, the following maximum bandwidths can be obtained during the
measurement.
Sample rate Max. bandwidth Notes
32 MHz 9.6 MHz
16 MHz 7.72 MHz
8 MHz 4.8 MHz Signals outside the given bandwidth are
folded back into the useful band due to the
anti-aliasing filter.
4 MHz 2.8 MHz
2 MHz 1.6 MHz max. bandwidth = 0.8 * sample rate for
sample rate ≤ 2 MHz
1 MHz 800 kHz
500 kHz 400 kHz
250 kHz 200 kHz
125 kHz 100 kHz
62.5 kHz 50 kHz
31.25 kHz 25 kHz
15.625 kHz 12.5 kHz
Due to the sampling concept (21.4 MHz IF, 32 MHz Sampling rate), the image frequency is suppressed
only by the 10 MHz analog IF filter. When applying an input signal at the edge of the 10 MHz band (+5
MHz from center), the image frequency appears 800 kHz above the input signal.
The image frequency in MHz is calculated as follows:
signalcenterimage
fMHz)5.4(f2f −+⋅=
where
f
image
= image frequency in MHz
f
center
= center frequency in MHz
f
signal
= frequency of the signal to be measured in MHz
For correct operation the RF input signal shall be limited in bandwidth. Signals more than 5.4 MHz
above the center frequency will be mirrored into the 10 MHz pass band.
For additional bandwidth limitation of the measurement data the analog filters (RBW
≥ 300 kHz) are
available.