The Keysight DSO81304A is a 13 GHz real-time digital oscilloscope built for high-speed serial communications and ultra-high-speed electronic system characterization. This four-channel instrument delivers up to 40 GSa/s sampling on two channels and 20 GSa/s across all four channels, with memory depths reaching 64 Mpts at 4 GSa/s. Trigger jitter below 500 fs rms and an noise floor as low as 419 µV @ 5 mV/div enable precise capture and measurement of fast transient phenomena. The DSO81304A integrates with the InfiniiMax II 1169A probing system, which provides 12 GHz specified bandwidth, ± 3.3 V dynamic range, and ± 30 V maximum input protection. Eight-bit vertical resolution extends to 12 bits with averaging, while vertical sensitivity spans 5 mV/div with ± 5 V maximum input. Channel-to-channel isolation reaches 60 dB DC to 3 GHz, degrading to 35 dB above 8 GHz. The instrument supports PCI-Express II, Serial ATA II/III, 6 Gbs SAS, Fibre Channel, and other high-speed standards with optional compliance test packages and advanced jitter and serial data analysis capabilities.

Technical Specifications

• Bandwidth: 13 GHz real-time, DSP enhanced
• Channels: 4 analog
• Sample Rate: 40 GSa/s (2 channels), 20 GSa/s (all 4 channels)
• Memory Depth: 0.5 Mpts (2 channels), 0.25 Mpts (4 channels) standard; up to 64 Mpts with MegaZoom Deep Memory option
• Trigger Jitter: <500 fs rms
• Vertical Resolution: 8 bits (12 bits with averaging)
• Vertical Sensitivity: 5 mV/div minimum
• Noise Floor: 419 µV @ 5 mV/div
• Input Impedance: 50 kΩ differential, 25 kΩ single-ended
• Input Capacitance: 0.21 pF typical (differential, InfiniiMax II 1169A)
• Channel Isolation: 60 dB (DC–3 GHz), 40 dB (3–8 GHz), 35 dB (8 GHz–BW)
• DC Gain Accuracy: ±2% of full scale at full resolution
• Maximum Input: ±5 V

– Probing System

• InfiniiMax II 1169A: 12 GHz specified, 13 GHz typical bandwidth
• Dynamic Range: ±3.3 V
• DC Offset: ±16 V
• Maximum Voltage: ±30 V
• Electronic attenuators eliminate mechanical relay concerns

– Typical Applications

• PCI-Express II and Serial ATA II/III validation
• 6 Gbs SAS and 4.25/8.5 Gbs Fibre Channel characterization
• 4.8 Gbs Fully Buffered DIMM measurement
• Jitter and serial data analysis with compliance testing