Brandywine’s RFS-700D is a miniaturized Rubidium Frequency Reference in a compact ruggedized package designed for mounting on a DIN rail system. The RFS-700D is capable of outputting 7x 10MHz frequency reference with low phase noise.

Transmission line probes are a special type of passive probe designed for use at very high frequencies. They replace the high impedance probe cable found in a traditional passive probe with a precision transmission line, with a characteristic impedance that matches the oscilloscope input (50 Ohm). This greatly reduces the input capacitance to a fraction of a picofarad, minimizing the loading of high frequency signals. A matching network at the tip increases the DC input resistance. While they have lower DC input resistance than a traditional passive probe (usually 500 Ohm) to 1kOhm), the input impedance of these probes remains nearly constant over their entire frequency range. A traditional /10 passive probe will have a 10 MOhm) input impedance at DC, however this impedance drops rapidly with frequency, passing below the input impedance of a transmission line probe at less than 100 MHz.

• 6U, Single Width VME 
  • Time Code Inputs 
  • Time Code Output 
  • 1PPS Pulse Rate Output/Interrupt 
  • Frequency Outputs (1, 5, 10 MHz) 
  • External Event Capture/Interrupt 
• Programmable Periodic Output/Interrupt 
• Programmable Time Strobe Output/Interrupt

• High stability OCXO or rubidium oscillator 
• 6 individually buffered outputs 
• Low phase noise output buffers

• Available in 250 MHz and 350 MHz models
• 2, 4 and 8 channel modes
• 16-bit vertical resolution
• Max Sampling rate of 1.2 GS/s
• Max sinewave frequency of 250 MHz and 350 MHz respectively

• 8 frequency counter channels, 16 isolated digital I/O channels, 2 isolated DAC channels in a single card 
• Single frequency measurement range that works from 0.05 Hz to 1 MHz 
• Very stable TCXO base clock, 50 MHz ±1 ppm 
• 195 kΩ Input impedance with selectable coupling (AC/DC) 
• Wide differential input voltage range (±48 V) with up to 250 V working common mode voltage 
• Programmable threshold and hysteresis levels with 1 mV resolution 
• Support for quadrature encoder 
• Isolated DIO channels with up to 60 V compliance 
• Isolated and independent 16-bit DAC channels, configurable for voltage or current output

• Allan deviation σ(τ) = 2.7×10-11 T-1/2 for long life version and σ(τ) = 8.5×10-12 T-1/2 for high performance version 
• Front or Rear access connectors 
• 3U high (133mm / 5.24”) — less than 200mm depth, compatible with ETSI and 19” standards 
• Accuracy better than ±1×10-12 / ±5×10-13 for high performance version 
• 10 MHz low noise direct output 
• Programmable 1 / 5 / 10 MHz TTL output 
• 10 years warranty on cesium tube (3 years for high performance version) 
• Redundant DC power supply inputs 
• Remote control and monitoring via RS232 (fully manageable locally and remotely using SyncView Plus management system.

• Network Enabled Distribution Amplifier 
• Low Phase Noise Reference Frequency Outputs 
• Fault Alarm Output 
• 1U 19″ Rack Mount 
• Frequency Synthesizer Option 
• Hitless Switching of Reference 
• Programmable Amplitude 
• Propagation Delay Compensation 
• 10 MHz Standard, Other Frequencies Available

• Wide Input Bandwidth 
• Input Isolation 
• Automatic & Manual Changeover 
• Transformer Coupled Outputs 
• Twenty four Outputs 
• Front Panel Status Indicators 
• Fault Discrete Inputs 
• Compact 1U, 19” rack mount