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