Stanford Research FS730 – Seven-channel Distribution Amplifier

The Stanford Research FS730 is a seven-channel distribution amplifier that replicates and synchronizes signals from a single source to multiple destinations with exceptional timing precision. Housed in a compact half-width benchtop chassis, it delivers low-jitter signal distribution across DC to 50 MHz with configurable frequency options. The unit accommodates virtually any waveform with near-50% duty cycle and CMOS-level logic pulses, making it ideal for multi-channel synchronization in test and measurement systems.

Technical Specifications

Inputs & Signal Conditioning

• Single AC-coupled or DC-coupled input with 1 kΩ impedance


• Input frequency range: DC to 50 MHz


• Schmitt trigger input with 1.3 VDC switching threshold (L-H) and 0.35 V hysteresis


• Input limiter conditions signals by removing amplitude modulation and blocking noise beyond 50 mV from zero-crossing


• Minimum pulse width: >5 ns


• Input overload indication at ±2 V; signal presence LED flashes at >300 mV Outputs


• Seven independent output channels


• 50 Ω ± 5% source impedance (optional 75 Ω available)


• Output levels: 0 VDC and 5.0 VDC (high-Z load); 0 VDC and 2.5 VDC (50 Ω load)


• 1 Vrms (+13 dBm) sine wave into 50 Ω load


• Output jitter: <10 ps rms


• Typical output delay: 9 ns with ±1 ns skew between channels


• Rise time: <1.5 ns; fall time: <1.0 ns


• Overshoot and undershoot: <5% each


• Configurable polarity via internal jumper (non-inverting as shipped)


• High channel-to-channel isolation at 10 MHz and beyond Physical & Power


• Benchtop chassis: half-width, 1U height


• Rack mountable with optional O730RMD kit (side-by-side mounting of two units in 19" rack)


• Power: 100/120/220/240 VAC, 50/60 Hz, 10 W (operates 90–132 VAC or 175–264 VAC, 47–63 Hz)

Key Features

• Sub-10 ps jitter preserves signal integrity across all seven channels


• Integrated input limiter eliminates amplitude variations and noise conditioning


• Fast rise/fall times (<1.5 ns / <1.0 ns) support high-speed digital and analog applications


• Flexible coupling options (AC/DC) accommodate diverse source impedances and DC offsets

Frequency Options

• FS730/1: One 10 MHz input, seven 10 MHz outputs


• FS730/2: One 5 MHz input, seven outputs

Typical Applications

• Multi-channel clock distribution in precision timing systems


• Signal synchronization across test instrumentation racks


• Reference distribution in RF and digital measurement setups