Manual

DA1855A Differential Amplifier
10 922258-00 Rev A
Model Description
The DA1855A series is comprised of 2 models which differ in physical configuration. Both contain
the same 100 MHz differential amplifier which provides high common mode rejection, extremely
fast overdrive recovery, selectable ÷1 or ÷10 attenuation, selectable X1 or X10 gain, a 5-1/2 digit
Precision Voltage Generator (PVG), selectable upper bandwidth limiting filters, and effective gain
display. and ± 500 mV output swing limiting. The PVG is provides a calibrated reference for
Differential Offset or Comparison modes. The PVG reference voltage is also available through a BNC
connector on the rear panel.
DA1855A: Single channel unit packaged in a convenient desk top housing.
DA1855A-PR2: Two independent model DA1855A amplifiers packaged in one housing with one
line power input connection. The housing is intended for desk top use, where it
can be placed under an oscilloscope.
Rack Mount Versions
Rack mounted versions available for models:
 DA1855A-RM: Single channel rack mounted version.
 DA1855A-PR2-RM: Dual channel rack mounted version.
Power Cable Option
(One must be specified at time of order)
 Option – P01: 120 V North America / Japan
 Option – P02: United Kingdom
 Option – P03: Universal Europe
 Option – P04: Australia / New Zealand
 Option – P05: Switzerland
Standard Accessories
Each DA1855A Differential Amplifier is packaged for shipment with the following items:
• Power cable, as specified by power cable option.
• ProBus interface cable with BNC signal cable. (-PR2 models include 2 ProBus cables)
• Certificate of Calibration traceable to NIST (United States National Institute of Standards and
Technology)
• Operator’s Manual, which includes a Performance verification Procedure.