Goldstar is a Korean company that in the 80's produced a series of electronics products for sale. Products were marketed on the lower/lowest priced model. The Cerritos address was likely a US distributor office. A google search suggests the unit came from the late 80's early 90's. One forum link supplied a list of wiring connections. No manuals were discovered. Some listings of product appear on ebay.
"Goldstar Precision Introduces New Generation Of Mono Radar"
Goldstar Precision, Cerritos, Calif., recently introduced its new generation mono radar with improved navigation and safety features for small commercial boats.
The new generation of mono scan radars, models GS924 M, GS932 M, and GS948 M, has a number of outstanding features. Some of the new features incorporated into the firm's new generation mono radar models include: echo plotting track history to observe the momentary movements of other ships at a glance; all push button control; daylight pictures presented on 9-inch green monochrome CRT; built-in 2 Electronic Bearing Line (EBL) and 2 Variable Range Marker (VRM) and 3 User's Defined Guard Zone with an audible alarm available; 5-kw transmitter output power; variable anti-clutter rain/sea; picture freeze, FTC, STC, IR available; on-screen readout of all operational information; and interfacing with magnetic compass NMEA0183 to supply ship's course.
The three lightweight, compact radar models cover three ranges.
The GS924 M with dome, covers up to 24 nautical miles; the GS932 M with a 3-foot open array, covers 32 nm; and the GS948 M, with a 5-foot open array, covers 48 nm.
In related news, Goldstar introduced a new radar junction unit, RJU-001, designed to work with the new generation mono radar series.
This " J " box will distribute the various radar control and target information signals between a single scanner transceiver antenna unit and two full function display control units.