81110A Specifications: 

• Single-/dual-channel pulse pattern generator
• 165 MHz, 10 V, 50 Ω into 50 Ω (81111A) OR
• 330 MHz, 3.8 V, 50 Ω into 50 Ω (81112A)
• Triggerable / PLL operation selectable
• Pulse / burst / pattern modes selectable
• Self-cal for improved timing accuracy
• BNC outputs: single-ended (81111A) / differential (81112A)