Specification :

The LG 3238 and LG 3219 generate CW, FM, AM, and simultaneous FM and AM signals in the frequency range of 100 kHz to 140 MHz as well as CW and FM signals in the frequency range of 162 MHz to 163 MHz. They are equipped with remote control capabilities.
These generators feature monaural FM and AM functions and an FM stereo modulator that complies with FM stereo broadcast standards.
Fundamental oscillation is used to generate frequencies between 70 MHz to 140 MHz and 162 MHz to 163 MHz directly.
These signals are used to derive 100 kHz to 35 MHz signals through the heterodyne method and 35 MHz to 70 MHz signals through the 1/ 2 frequency division method.
The LG 3238 and LG 3219 are synthesized signal generators that produce accurate RF signals, which are phase-locked at all times to the internal reference crystal oscillator. The frequency resolution is 100 Hz.
The � F function can be used to get a direct reading of how much the frequency is offset from the reference frequency. In addition, the frequency can be changed in preset steps. The output level can be set to a value from -20 dBµ V [ emf] to 126 dBµ V [ emf] in 0.1 dB steps. With the exception of the use of a relay to switch to 106 dBµ V [ emf] , a solid-state attenuator is used to switch the output levels in order to extend the generator’ s service life.
The � dB function can be used to get a direct reading of how much the output level is offset from the reference level. In addition, the output level can be changed in preset steps.
These generators can apply frequency modulation and amplitude modulation simultaneously. This feature can be used to combine internal modulation signals with one external modulation signal.
The internal stereo modulator generates composite stereo modulation signals that comply with FM stereo broadcasting systems.
These generators have a preset function that can store 100 sets of frequency, output-level, modulation-mode, and externalcontrol output-signal settings. A preset can be recalled as necessary to reconfigure the generator.
The front panel settings are retained even when the power is turned off. If the generator is turned off and then turned back on, the previous settings are restored.
These specifications and features are the reasons why these generators are used in a wide variety of ways. They are used as automation devices for the manufacturing and inspection of AM and FM receivers and electronic components and as signal generators for servicing, research, and development.