The LSW 251 Swemar Generator is an integrated sweep and marker generator used for wide frequency band. An outstanding width of the generating frequency range provides the users with various applications, including tests and adjustments of TV receivers, FM tuners, CATV equipment, and tuning coils. The instrument is a requisite particularly for the after-sales service of TV receivers. FEATURES (1) Sweep frequency is continuously variable in a range of 2 to 300MHz for a band. (2) Sweep generator’s center frequency is electronically variable by using variable capacitance diode. (3) Maximum sweep width of 20MHz is suited for TV tuner checking. (4) Built-in circuit for automatic level control ensures constant output. (5) Variable attenuator is electronically controlled and continuously variable from 0 dB to - 10 dB. (6) Markers are generated in a wide frequency range; on the needle, frequency bands are classified by color, and the scales have band indications for easy reading. (7) Marker adder circuit is incorporated. (8) Input terminal for external marker source is equipped. (9) Internal crystal-oscillator circuit requires no adjustment and its quartz crystal (FT-243) of 1 to 14MHz can be replaced. (10) Solid-state components allow less power consumption, compact size, and light weight.