5Block Diagram
108 Keysight 33210A Service Guide
A portion of the output sine wave is squared by a comparator and used to create a
variable duty cycle signal used by the Synthesis IC to create the squarewave,
pulse generator clock, and sync signals.
The squarewave DAC output is split into two opposite value signals and applied to
a multiplexer. The output of this multiplexer is a square wave or pulse signal with
the correct duty cycle. The rising edge and falling edge of the signal are adjusted
and the signal is buffered and sent to the Main Output Circuit.
The Main Output circuit accepts one of two inputs; the sine/arb waveform or the
squarewave/pulse waveform. Once selected, the signal can be applied to one or
both attenuators and/or a +20 dB amplifier. The attenuators and amplifier are
used to create the requested output signal amplitude.
Amplitude Range
(Vpp into 50 Ω)
Offset <2.5 V Offset >2.5 V
–10 dB –20 dB Amp –10 dB –20dB Amp
10 V to 3.16 V Out Out In Out Out In
3.16 V to 1 V In Out In In Out In
1 V to 0.316 V Out Out Out Out In In
0.316 V to 0.1 V In Out Out In In In
0.1 V to 0.0316 V Out In Out
0.0316 to 0.01 V In In Out
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