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Program Sequence
and Execution
The recommended sequence of an E1446A register-based program is
shown in Figure C-3.
Programming begins with the amplifier in its previous (current)
configuration. This may be the reset configuration or some other preset
condition. The register-based program sets the new configuration while
maintaining the previous configuration. This prevents a possible
momentary all (relay) open situtation which could output a high-voltage
glitch. Once the relays (especially the attenuation and impedance relays)
of the new configuration are closed, the relays corresponding to the
previous configuration are opened.
Previous
Amplifier
Configuration
Set New Configuration
Combined
Previous / New
Configuration
Remove
Previous
Configuration
Close relays corresponding to new
configuration
Relays from previous configuration
and new configuration closed
Open relays corresponding to
previous configuration
Figure C-3. Recommended Amplifier Configuration Sequence.
C-14 Register-Based Programming Programming the Amplifier