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Programming the Amplifier
Figure C-2 is a block diagram of the Agilent E1446A Summing
Amplifier/DAC. The diagram shows the portions of the summing
amplifier/DAC configured with register-based programming. The
following information covers the sequence used to program the
amplifier.
Base + 0A
16
Bits 3 - 2: output impedance
of non-inverting and inverting
differential output
Base + 0A
16
Bits 7 - 6: 0 / -20dB attenuation
Bit 5: ’Main’ Output impedance
Bit 4: ’Main’ output enable
Base + 08
16
Bits 15 - 0: DAC control code
Base + 0C
16
Bits 10 - 9: Input 1 impedance
Bits 2 - 1: Input 2 impedance
Base + 0C
16
Bits 15 - 11: Input 1 attenuation
Bits 7 - 3: Input 2 attenuation
Figure C-2. Register Programming the Summing Amplifier/DAC.
C-12 Register-Based Programming Programming the Amplifier