The HP 11848A is the dedicated phase noise interface for the HP 3048A phase noise measurement system. It houses phase detectors, amplifiers, filters, and signal-routing switches, supporting several measurement techniques for both phase noise and AM noise across a 5 MHz to 18 GHz frequency range.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (IEEE-488) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 / 120 / 220 / 240 VAC (+5%/-10%), 48 to 66 Hz, 120 VA max |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 425.5 mm × 132.6 mm × 514 mm |
| Weight | 15.5 kg |
Compatibility & System Integration
| Parameter | Value |
|---|---|
| System Compatibility | HP 3048A Phase Noise Measurement System |
| Measurement Support | Phase noise and AM noise measurements |
Signal & Performance Characteristics
| Parameter | Value |
|---|---|
| Standard Input Frequency Range | 5 MHz to 1.6 GHz |
| Extended Input Frequency Range | 1.2 GHz to 18 GHz (requires Option 201) |
| Phase Noise Offset Range | 0.01 Hz to 40 MHz |
| Left Port RF Input Amplitude (5 MHz - 1.6 GHz) | +15 dBm to +23 dBm |
| Right Port RF Input Amplitude (5 MHz - 1.6 GHz) | 0 dBm to +23 dBm |
| Left Port Microwave Input Amplitude (1.2 GHz - 18 GHz, Option 201) | +7 dBm to +10 dBm |
| Right Port Microwave Input Amplitude (1.2 GHz - 18 GHz, Option 201) | 0 dBm to +10 dBm |
| External Phase Detector Input | Provided for measurements outside the internal frequency range |
| Error Detection | Detectors that sense erroneous measurement conditions |
| Signal Routing | Numerous internal signal-routing switches |
| Loop Control Networks | Process phase detector output for voltage control of the input sources |
| Noise Processing Networks | Process phase noise for measurement by a spectrum analyzer |
Internal Calibration Sources
| Parameter | Value |
|---|---|
| Calibration Source 10 MHz A Amplitude | +15 dBm |
| Calibration Source 10 MHz A Tuning | ±100 Hz |
| Calibration Source 10 MHz B Amplitude | +6 dBm |
| Calibration Source 10 MHz B Tuning | ±1 kHz |
| Calibration Source 350-500 MHz Amplitude | +17 dBm |
| Calibration Source 350-500 MHz Tuning | ±20 MHz |
| Calibration Source 400 MHz Amplitude | -5 dBm |
| Calibration Source 400 MHz Tuning | Fixed |
| Internal Calibration Verifications | Four built-in RF sources for functional checks of signal-handling circuits |
System Options
| Parameter | Value |
|---|---|
| Option 201 | High frequency phase detector (1.2 GHz to 18 GHz) |
| Option 907 | Front-handle kit |
| Option 908 | Rack-flange kit |
| Option 909 | Rack-flange and front-handle combination kit |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -55 to +75 °C |
LNA Performance
| Parameter | Value |
|---|---|
| LNA Frequency Range | 0.1 Hz to 45 MHz |
| LNA Gain Settings | 20 dB / 40 dB |
| LNA Input Noise Density (10 Hz) | < 10 nV/√Hz |
| LNA Input Noise Density (100 Hz) | < 4 nV/√Hz |
| LNA Input Noise Density (1 kHz) | < 2 nV/√Hz |
| LNA Input Noise Density (10 kHz - 45 MHz) | < 1.4 nV/√Hz |
RF Inputs
| Parameter | Value |
|---|---|
| Maximum Safe RF Input Level | +23 dBm |
Tuning Output
| Parameter | Value |
|---|---|
| Tuning Voltage Output Range | -10 V to +10 V |
Applications
Phase noise and AM noise measurement
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