The Agilent/Keysight 11835A is a data buffer and serial output device designed to simulate digital radio transmissions and support testing of digital mobile communication systems. It buffers data from a computer and outputs it as a serial stream, enabling characterization of digital cellular systems across GSM, NADC, and PDC standards.
Technical Specifications
• Data Output Rate: DC to 4 MHz
• FIFO RAM Capacity: Two 1024 Mbit FIFOs for continuous data streaming
• Frame Control RAM: 128 K × 16 bits
• Memory Architecture: Programmable state machine with dual FIFO RAMs, Frame Control RAM, and Hop Control RAM
• Clock Input References: 1 MHz, 2 MHz, 5 MHz, or 10 MHz (option-dependent)
• Data Interface: GPIO for data loading
– Key Features
• Serial data buffering with user-supplied clock control
• Dual 1024 Mbit FIFO RAMs enable continuous operation by loading one while the other transmits
• Frame Control RAM manages data output timing and internal/external clock and trigger signals
• Hop Control RAM drives fast-hopping sources for GSM frequency-hopping simulation
• Option 001 (GSM Reference): Provides bit clock (270.833 kHz) and frame clock (216.67 Hz) with 10 MHz and 13 MHz outputs
• Option 002 (NADC/PDC Reference): Delivers synchronized clocks for North American and Japanese digital cellular systems
• Configurable as programmable state machine for flexible signal generation
– Typical Applications
• GSM radio testing and frequency-hopping simulation
• Digital mobile communication system characterization
• NADC and PDC digital cellular system testing
• Frequency-hopping source simulation with compatible external equipment
– Compatibility & Integration
The 11835A integrates with external frequency-hopping sources such as the Keysight 8662A-H25. Reference options synchronize output clocks to GSM, NADC, and PDC system frequencies, supporting seamless integration into multi-standard digital cellular test environments.
