Specs 
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Base Model
1DN
50 Ohmtracking Generator
A4H
GPIB and Parallel (Centronics) Interfaces
A4J
If And Sweep Ports
Product Overview
When your budget is limited, your test equipment does not have to be. The Keysight (formerly Agilent) ESA-L series of general-purpose, portable spectrum analyzers provides basic spectrum analysis, with the speed and accuracy you need. Features: 8590-series programming code compatibility Multiformat RF power measurement suite Four-millisecond RF sweep time +/- 1.1 dB overall amplitude accuracy Large, high-resolution, color VGA display Rugged, portable, weather-resistant package Five-minute warm up> Built-in help button
