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Example: Controlling
RF Switches/Step
Attenuators
Figure 3-3 shows one way to drive Agilent 8761 SPDT RF Switches or
Agilent 33300 Series Programmable Step Attenuators. (Figure 3-3 only
shows control for the Agilent 33300 40 dB step. Additional drive relays are
required for the 10 dB and 20 dB steps.) The Agilent 8761A and Agilent
33300A/C operate from a 12-15V coil voltage, while the Agilent 8761B and
Agilent 33300B/D operate from a 24V-30V coil voltage. For example, to
close channel 00, execute:
CLOS (@100) Close channel 00 relay (connect
NO to C). 1 is the card number and
00 is the channel number
To open channel 00, use OPEN (@100).
Figure 3-3. Example: Controlling RF Switches/Step Attenuators
28 Using the Agilent E1364A Form C Switch Chapter 3