R&S
©
FPC-Z10 Teaching Kit
Getting Started 1178.8436.02 – 0
4
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Signal processing paths
The teaching kit has two signal processing paths, an upconverter and a downconverter that
support frequencies between 85 Mhz and 2700 MHz. Both signal paths have several signal
processing sections.
●
an attenuator with variable signal attenuation
●
an amplifier with a gain of approx. 18 dB at 836.5 MHz
●
a bandpass filter with a 3 dB bandwidth of approx. 20 MHz at 836.5 MHz
●
a mixing stage to up- or downconvert the signal
●
an I/Q modulator or I/Q demodulator
Each section has an RF input and an RF output. Both signal paths have an additional I/Q input
(upconverter) and output (downconverter) for measurements of baseband signals.
You can feed a signal into any of the inputs and use the R&S
®
FPC to measure the processed
signal at any of the subsequent outputs. When you apply a signal, make sure not to overload
the inputs and outputs (max. 0 dBm).
You can bypass or close any of the inputs and outputs by setting the corresponding jumpers.
Here’s an example for the downconverter:
1. Feed the RF signal into the signal path.
2. The first section that the signal passes through is the attenuator.
3. Cover the jumper pins in front of the amplifier section as indicated in the image to bypass
the first output.
4. The signal passes through the amplifier.
5. Cover the jumper pins in front of the bandpass filter as indicated in the image to close off
the bandpass filter.
6. The signal bypasses the bandpass filter section (this is useful if you want to use your own
filter, for example).
7. Feed the signal into the signal path.
8. Cover the jumper pins in front of the demodulator as indicated in the image to close the
signal path.
9. The signal gets mixed to the LO frequency.
10. The signal is demodulated and the I and Q data streams are output on the I/Q output.
The signal path of the upconverter is the same, only in reverse order.
