Agilent Technologies 87421A, 87422A User Manual
The Agilent 87421A and 87422A power supplies
are universal input, dc switching power supplies
designed to provide the bias voltages needed to
operate Agilent microwave system amplifiers.
These compact power supplies are ideal for integration into a system or for use on a benchtop.
The 2 meter dc bias cable permits the amplifier
to be remotely located, allowing it to be placed
out of the way or where space is not critical.
The 87421A is a 25 watt, ±12V dc power supply
designed to power the Agilent 83006A, 83017A,
83018A, and 87415A microwave system amplifiers.
A 2 meter cable is included for direct connection
to the amplifier.
The 87422A is a 90 watt, ±15V dc power supply
designed to power the Agilent 83020A microwave
system power amplifier. One additional ±12V dc
output is provided to power a preamp such as
the 83006A or 83017A.
Included with the power supply are the necessary
2 meter cables to connect to the amplifier.
The 87421A may also be used to provide bias voltages for the Agilent 83440C high speed lightwave
converter. Using the 83440-60009 lightwave converter power supply adapter, the 87421A becomes
a compact, convenient power supply for use with
the lightwave converter.
Agilent 87421A/87422A
Power Supply
Product Overview
• Designed specifically for Agilent Technologies
microwave system amplifiers
• Bias cable permits remote placement
• Compact size for easy system integration
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Product specifications
Agilent 87421A Agilent 87422A
Output voltage/current +12V at 2 A +15V at 4.0 A
–12V at 200 mA –15V at 200 mA
+12V at 2 A
–12V at 200 mA
Output power 25 W 90 W
Line regulation 0.1% 0.1%
Load regulation (20% to full load) 2.0% 1.0%
Output ripple 25 mV RMS max 25 mV RMS max
Output noise 2% peak to peak max 2% peak to peak max
Overvoltage limit protected Yes Yes
Short circuit protection Current limited for overload and shod Current limited for overload and short
circuit protection. Normal operation circuit protection. Normal operation
returns upon removal of overload. returns upon removal of overload.
General specifications
AC input voltage 90–250 VAC, 50/60 Hz 90–240 VAC, 50/60 Hz
Fuse 1 A, slow blow T 3.15 A
Weight 0.9 kg (2.0 lb) 2.1 kg (4.6 lb)
Shipping weight 1.8 kg (4.0 lb) 3.2 kg (7.0 lb)
Environmental specifications
Operating temperature 0° to +55° C full load 0° to +55° C full load
Storage temperature –40° to +70° C –40° to +70° C
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Other product and operating information
Operation of the power supplies involves connecting the power supplies output to the amplifier dc
input with the cable provided. The power supplies
include a power cord with protective ground for
connection to 90–240 VAC.
Mounting holes are provided as shown in the outline drawings. The power supplies may be mounted
in any orientation with user supplied hardware.
To ensure continued compliance to product safety
and EMC specifications, connect the power supplies
to an amplifier only with the cable provided. Do
not attempt to modify or extend the dc output
cable. For help with special applications requiring
longer cables contact your Agilent call center listed
on the back page.
The power supplies have a fuse located next to
the IEC appliance inlet. If it is necessary to replace
the fuse, disconnect the power supply from both
AC power and the amplifier. Using a slotted screwdriver, open the fuse cover and replace the fuse.
The power supplies contain no user serviceable
parts (with the exception of the fuse). If service is
required, please contact your Agilent sales office
or nearest Agilent Service Center.
The Agilent 87421A power supply provides the dc power needed to bias the 83006A, 83017A, and 83018A. The power
supply comes with a 2 meter long cable to allow easy connection between the amplifier and the power supply.
Dimensions in millimeters and (inches).
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