GENERAL INFORMATION
10
RF level accuracy and bursting
The 3020 Series maintains accurate RF output levels to typically ±0.3 dB, and can generate
modulated RF bursts to simulate TDMA signal characteristics.
IQ digital modulation
The 3020 Series provides high-quality digital modulation suitable for all common radio
communications applications, either from the internal ARB or from an external source via the
LVDS data connector.
Analog I &Q inputs and outputs (optional)
The 3020 Series can provide baseband I and Q output and CW RF output simultaneously.
Differential analog I and Q outputs from the ARB are provided, with control of differential
output level, DC bias and offset voltage.
IQ vector modulation
Analog I and Q inputs can be used to generate wideband vector modulation from external
analog I and Q sources such as test instruments and device outputs.
Arbitrary waveform generator (ARB)
The ARB can store 128 Msamples (or 0.5 Gsamples with Option 04 fitted) in
3020C/3021C/3025C/3026C, or 32 Msamples in 3020A/3025, either as a single long
waveform or any number of smaller waveforms up to the capacity limit of the sample
memory. Waveforms transfer quickly between the PXI controller and the ARB because of the
wide bandwidth of the PCI backplane. Playback times of more than 30 minutes are possible,
longer if ARB sequencing is used.
ARB sequencing
ARB sequencing provides a method for extending the effective ARB sample memory as well
as providing a flexible way to compile test sequences. You can define up to 128 sequence
steps, each of which defines an ARB file from a selection of up to 1 million (128 when in List
mode) (3020C/3021C/3025C/3026C), or up to 64 (3020A/3025), and play it a chosen number
of times before continuing on to the next file in the ARB sequence.
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