Output Circuitry; Microprocessor; Input/Output Connectors - HP E1340A User Manual

Output Circuitry

Attenuator
Output Amplifier
Offset Circuitry

Microprocessor

Input/Output
Connectors
Signal Output
Aux In
Aux Out
Chapter 9
The output circuitry outputs the waveform at the front panel's "Signal
Output" connector. The circuitry sets the output amplitude, offset voltages,
and output impedance.
The attenuator provides 20 dB attenuation for the output voltage. The AFG
automatically sets the attenuator to the appropriate value dependent on the
output amplitude selected by the user.
The output amplifier provides the necessary current to drive output loads of
50 . For matched loads, the output amplitude is from -5.12 V to +5.11875
V. In addition, the amplifier can also be set for open circuit or infinite loads
applied to the "Signal Output" connector. For open circuit outputs, the
amplitude range is twice the matched load values.
This circuitry offsets the output amplifier to provide an offset voltage.
The purpose of the microprocessor is to monitor the "Aux In" input line to
help control frequency-shift keying, burst, and waveform hopping
operation. It also interprets low-level commands received over the VME
bus.
The AFG uses three connectors, a "Signal Output", "Aux In", and "Aux
Out" connector.
This connector outputs the AFG's standard and arbitrary waveforms.
This connector is used for frequency-shift keying control, waveform
hopping, reference oscillator gating, reference oscillator source, or arm start
source.
This connector outputs the marker sources selected by the
command. The Output MUX connects the appropriate
[SOURce:]MARKer
signals to the connector.
HP E1340A Block Diagram Description 214