Agilent Technologies L4400 manual Power Supplies, Power Consumption

7Microwave Switch/Attenuator Driver

Power Supplies

The switches and attenuators on the master remote module can be powered from the L4445A or use an external power supply. All additional slave modules must use an external power supply.

Each remote module has a terminal strip used to connect external switch power. The three most common power supply voltages used by the microwave switches and attenuators are:

• 5 Volts
• 15	Volts
• 24	Volts (most common)
	30	POWEREXTERNAL
	VCD		MAX	INPUT
					+V
					+V
					GND

Power Consumption

Each 34945EXT can drive up to 2A continuously using an external power supply. The actual amount of power available for the switches on each 34945EXT module varies with the type of switches being used and the settings for those switches.

•Some switch types consume power even in their quiescent state.

Be sure to review the switch data sheets for the switches you are using.

•Set the pulse width to the minimum necessary to activate the switch using the ROUTe:CHANnel:DRIVe:PULSe:WIDTh command.

•Add power supply recovery time using the

ROUTe:CHANnel:DRIVe:TIMe:RECovery command

•Use an external power supply if possible.

•When the drive source for the master remote module is set to internal, each driver interface module may supply up to 2A.

142 L4400 User’s Guide