6 Input/Output
6.2 Input
The cable loss will depend on the IF frequency. The IF frequency varies depending
on which IF path your measurement is using. For best accuracy, characterize your
cable’s loss for the IF frequency or frequencies you will be using.
IF Frequencies
10 MHz path 322.5 MHz
25 MHz path 322.5 MHz
40 MHz path 250 MHz
140 MHz path 300 MHz
Remote Command
[:SENSe]:MIXer:CIFLoss <rel_ampl>
[:SENSe]:MIXer:CIFLoss?
Example
:MIX:CIFL 0.23 DB
:MIX:CIFL?
Dependencies Only appears when External Mixer is selected as the Input
Preset 0.26 dB
State Saved Saved in instrument state
Min -100
Max 100
6.2.19 I/Q Path
Selects which I/Q input channels are active. The LED next to each I/Q input port will
be on when that port is active.
The analysis bandwidth for each channel is the same as that of the instrument. For
example, the base N9020A has a bandwidth of 10 MHz. With I/Q input the I and Q
channels would each have an analysis bandwidth of 10 MHz, giving 20 MHz of
bandwidth when the I/Q Path is I+jQ. With option B25, the available bandwidth
becomes 25 MHz, giving 25 MHz each to I and Q and 50 MHz to I+jQ.
I/Q voltage to power conversion processing is dependent on the I/Q Path selected:
–
With I+jQ input, we know that the input signal may not be symmetrical about 0
Hz, because it has a complex component. Therefore, above 0 Hz only the positive
frequency information is displayed, and below 0 Hz only the negative frequency
information is displayed
–
With all other Input Path selections, the input signal has no complex component
and therefore is always symmetrical about 0 Hz. In this case, by convention, the
power conversion shows the combined voltage for both the positive and negative
frequencies. The information displayed below 0 Hz is the mirror of the
2071 Short Range Comms & IoT Mode User's &Programmer's Reference
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