The HP/Agilent 11848A Phase Noise Interface is a measurement module within the HP/Agilent 3048A Phase Noise Measurement System. It enables absolute residual, AM noise, and pulse measurements across a broad frequency span through integrated phase detectors, amplifiers, filters, and switches. The module supports both internal and external phase detection architectures, with internal reference oscillator outputs for system functional verification.
Technical Specifications
Frequency Coverage
• Internal mixer: 5 MHz to 1.6 GHz
• With Option 201 (High Frequency Phase Detector): extends to 18 GHz without external down-conversion
• External phase detector input for out-of-range measurements
Input Amplitude Requirements
5 MHz to 1.6 GHz operation:
• Left port: +15 dBm to +23 dBm
• Right port: 0 dBm to +23 dBm
1.2 GHz to 18 GHz (Option 201):
• Left port: +7 dBm to +10 dBm
• Right port: 0 dBm to +10 dBm
Internal Reference Oscillator Outputs
• 10 MHz at +15 dBm with ±100 Hz tuning
• 10 MHz at +6 dBm with ±1 kHz tuning
• 350–500 MHz at +17 dBm with ±20 MHz tuning
• 400 MHz at −5 dBm (fixed tuning)
Power
Fuse ratings: 0.75 A (115 Vac, HP part 2110-0063); 0.5 A (230 Vac, HP part 2110-0012). Line power cable supplied per destination.
– Key Features
• Supports two-port absolute residual measurements for phase noise characterization
• AM noise measurement capability integrated into measurement framework
• Built-in sources for pre-measurement functional verification of signal circuits
• GPIB programmable interface for automated control and integration
– Typical Applications
• Phase noise and AM noise analysis of RF/microwave signal sources
• Residual phase noise measurement of oscillators and synthesizers
• Pulse modulation measurement analysis
– Compatibility & Integration
Designed as an integral module of the HP/Agilent 3048A Phase Noise Measurement System. Compatible with HP 3561A Dynamic Signal Analyzer for demodulated phase noise measurement. Works with HP 8662A and 8663A Synthesized Signal Generators. Accepts user-supplied external mixers. GPIB control requires National Instruments GPIB adapter.
