Lesson 1 – Analog Modules
71
For details about these routes, see “Pin Connections with an
Analog Module’s Multiplexer” on page 99.
AWG Instr ument
The AWG instrument is installed in the analog support rack.
The Ultra High Speed AWG is a dual-core instrument. This means
that it contains two AWG cores that are both connected to the
same front-end card.
The following describe the functions of each block of the AWG
instrument.
1 Analog Output Circuit
The analog output circuit contains the following circuits.
– Attenuator for adjusting the amplitude of the output signal
– Low pass filter for removing harmonics from the output signal
– DC offset circuit
– Output amplifier
The ultra high speed AWG has two output modes. One is normal
mode and the other is direct mode. The direct mode can generate
signals of higher frequency than the normal mode. In the direct
mode, the DAC output propagates to the pogo pin not through the
filter and DC offset circuitry, but only the attenuator.
2 Digital-to-Analog Converter (DAC)
The DAC converts the digital waveform data transferred from the
waveform memory to the analog signal. The conversion is
synchronized to the data that is sent to the DAC by the conversion
clock provided by the clock oscillator.
3 Clock Oscillator
The clock oscillator generates the conversion clock and provides it
to the DAC. The master clock of the SOC series is phased-locked
with the clock oscillator.
4 Sequencer and Waveform Memory
The sequencer controls output sequence of the waveform data
stored in the waveform memory. The output sequence of the
waveform data is specified in the sequence program that is
contained in the sequence memory.
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