The range comprises two models: the single-channel FG410 and the dual-channel FG420, both generating signals up to 20 V peak-to-peak over a frequency range of 0.01 μHz to 30 MHz. Operation is via front-panel pushbuttons and a 3.5-inch LCD screen that displays alphanumeric values along with the generated waveforms.
The instruments incorporate a number of basic waveforms as standard, including sine, DC, ramp, square, and pulse. Advanced functions include sweep (frequency, phase, amplitude, DC offset, and duty cycle), modulation (FM, FSK, PM, PSK, AM, DC offset, and PWM), and burst (auto, trigger, gate, and gate triggered).
Up to 128 arbitrary waveforms, up to 512 kW per waveform, can be generated and saved in the instrument's internal non-volatile memory and then selected from a displayed list. Waveforms can be created directly on the FG400 or using the included free editing software. Sequences of different waveform patterns can be generated and edited by programming the appropriate parameters.
The FG400 series can also generate arbitrary waveforms based on signals acquired by measuring instruments. Troubleshooting is simplified because the instrument can generate waveforms that are difficult to reproduce, such as noise generated on-site. Using the free waveform editing software acquired with the Yokogawa DL850E ScopeCorder or the DLM4000 oscilloscope, for example, mixed signals can be analyzed on a PC to identify abnormal waveforms. These abnormal portions can then be isolated, saved, and generated using the FG400.
The FG400 Series also offers 25 different types of specific waveforms, including those needed to evaluate the response characteristics of mechanical/electrical circuits and emulate power supply circuits. Because the parameters of these specific waveforms can be changed using those of basic waveforms, waveforms are generated more quickly and easily.
The two output channels of the FG420 can be linked. In this mode, both output signals vary when either channel is adjusted. Furthermore, up to six units can be linked and synchronized to provide up to 12 output channels. The phase of each channel is synchronized with the master unit and can be adjusted individually.
The FG400 Series also has an external input terminal that allows it to be used with a more accurate external frequency reference, such as a rubidium frequency standard.
The Yokogawa FG410 and FG420 are desktop units with dimensions of 216 (W) x 88 (H) x 332 (D) mm and an approximate weight of 2.1 kg.
