Maybe even major surgery - which comes not only at great cost but at great risk. 62.5 MHz (SG382 & SG384), f c > 93.If you've ever lived with pain, you've likely tried every chronic pain management technique you could. The end result is an agile RF source with low phase noise, essentially infinite frequency resolution, without the spurs of fractional-N synthesis or the cost of a YIG oscillator. Doing so provides a high phase comparison frequency (typically 25 MHz) yielding low phase noise while moving the PLL reference spurs far from the carrier where they can be easily removed. The PLL reference frequency, which is sourced by a voltage control crystal oscillator that is phase locked to a dithered direct digital synthesizer, is adjusted so that the PLL generates the exact frequency. RAFS uses small integer divisors in a conventional phase-locked loop (PLL) to synthesize a frequency that would be close to the desired frequency (typically within ☑00 ppm) using the nominal PLL reference frequency. The SG380 Series Signal Generators are based on a new frequency synthesis technique called Rational Approximation Frequency Synthesis (RAFS). Up to nine instrument configurations can be saved in non-volatile memory. All instrument functions can be controlled and read over any of the interfaces. Remote operation is supported with GPIB, RS-232 and Ethernet interfaces. Rear-panel outputs allow the noise source to viewed or used for other purposes. This option also allows the I/Q modulator to be driven by an internal noise generator with adjustable amplitude and bandwidth. 03) allow I & Q baseband signals to modulate carriers from 400 MHz to 4.05 GHz. Transition times are typically 35 ps, and both the offset and amplitudes of the clock outputs can be adjusted for compliance with PECL, ECL, RSECL, LVDS, CML, and NIM levels. 01) are available on the rear-panel that make the SG384 a precision clock generator in addition to a signal generator. Optional differential clock outputs (Opt. An external 10 MHz timebase reference may be supplied to the rear-panel timebase input. The internal 10 MHz timebase (either the standard OCXO or the optional rubidium reference) is available on a rear-panel output. 04) may be ordered to substantially reduce frequency aging and improve temperature stability. The timebase provides very low phase noise and very low aging. The timebase uses a third-overtone stress-compensated 10 MHz resonator in a thermostatically controlled oven. The SG380 Series come with a oven-controlled crystal oscillator (OCXO) timebase. And for frequencies above 62.5 MHz, each sweep range covers more than an octave. Unlike traditional analog signal generators, the SG380 Series can sweep continuously from DC to 62.5 MHz. The internal modulation generator is available as an output on the rear panel. An external modulation signal may be applied to the rear-panel modulation input. The internal modulation source produces sine, ramp, saw, square, and noise waveforms. There is an internal modulation source as well as an external modulation input. Modes include amplitude modulation (AM), frequency modulation (FM), phase modulation (FM), and pulse modulation. The SG380 Signal Generators offer a wide variety of modulation capabilities. An N-type output sources frequencies from 950 kHz to 4.05 GHz with power from +13 dBm to -110 dBm (amplitude from 1 Vrms to 0.707 µVrms) into a 50 O load. A BNC provides outputs from DC to 62.5 MHz with adjustable offsets and amplitudes from 1 mV to 1 Vrms into a 50 ? load. The SG380 Series Signal Generators have two front-panel outputs with overlapping frequency ranges. For demanding applications, the SG380 Series can be ordered with a rubidium timebase (Opt. 01) are available, and an external I/Q modulation input (Opt. Low-jitter differential clock outputs (Opt. 02) that extends the frequency range of the SG384 and SG386 to 8.10 GHz. There is an optional frequency doubler (Opt. The standard models produce sine waves from DC to 2.025 GHz (SG382), 4.05 GHz (SG384) and 6.075 GHz (SG386). The Stanford Research Systems SG380 Series RF Signal Generators use a unique, innovative architecture (Rational Approximation Frequency Synthesis) to deliver ultra-high frequency resolution (1 µHz), excellent phase noise, and versatile modulation capabilities (AM, FM, ØM, pulse modulation and sweeps) at a fraction of the cost of competing designs. Additional 12 months warranty for free (2 years total) via our UK Service Centre.
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