The Keysight (formerly Agilent / HP) 435B is a classic, highly reliable analog RF and microwave power meter. It is designed to work seamlessly with the 8480 series of power sensors, offering precise measurements over a wide frequency and power range. Renowned for its low noise, automatic zeroing capability, and optional portable battery operation, the 435B remains an industry icon for analog RF power measurement.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Analog Recorder Output (rear panel BNC); no digital programming interfaces |
| Display | Analog d'Arsonval meter with dual-scale (0 to 10 & 0 to 3) and dBm scale (-10 to +3) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100/120/220/240 V AC (+5% to -10%), 48 to 66 Hz and 360 to 440 Hz, < 10 W; rechargeable battery optional (Option 001) |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 134 mm × 155 mm × 279 mm |
| Weight | 2.6 kg (standard, without battery) |
| Cabinet Style | HP System II 1/3-rack |
Measurement Capabilities
| Parameter | Value |
|---|---|
| Number of Channels | 1 |
| Frequency Range | 100 kHz to 110 GHz (sensor dependent) |
| Power Measurement Range | -70 dBm to +44 dBm (sensor dependent) |
Measurement Accuracy and Calibration
| Parameter | Value |
|---|---|
| Instrumentation Accuracy | ±1% of full scale on all ranges |
| Internal Calibration Source Frequency | 50 MHz |
| Internal Calibration Source Power Output | 1.00 mW (0 dBm) |
| Internal Calibration Source Uncertainty | ±0.7% (traceable to National Standards) |
| Internal Calibration Source Connector | Type N (female) on front panel |
| Zeroing | Manual zeroing via front-panel knob |
Sensor Compatibility and Connection
| Parameter | Value |
|---|---|
| Compatible Sensor Families | 8480 Series Power Sensors |
| Supported Cable Lengths | Up to 61 m (200 ft) |
| Calibration Factor Control | 85% to 100% in 1% steps via front-panel dial |
User Interface and Display
| Parameter | Value |
|---|---|
| Meter Response Time | Fast (approx. 100 ms) or Slow (approx. 2.5 s) switch-selectable |
System Connectivity and Interfaces
| Parameter | Value |
|---|---|
| Recorder Output Voltage | 0 to 1.0 VDC into open circuit (proportional to meter deflection) |
| Recorder Output Impedance | 1 kΩ nominal |
Physical and Power Specifications
| Parameter | Value |
|---|---|
| Power Consumption | < 10 W (AC operation) |
| Battery Option Availability | Available as Option 001 (internal rechargeable pack) |
Environmental and Compliance
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +75 °C (excluding battery) |
| Relative Humidity Limit | 95% R.H. at 40 °C |
Display
| Parameter | Value |
|---|---|
| Meter Scales | dBm (-10 to +3) and linear (0 to 1.0 and 0 to 3.0) |
| Meter Movement Type | Taut-band, mirror-backed |
Power
| Parameter | Value |
|---|---|
| Option 001 Battery Operating Time | Up to 16 hours |
| Option 001 Battery Recharge Time | 16 hours (instrument off), 24 hours (instrument on) |
| AC Line Frequency Range | 48 to 66 Hz and 360 to 440 Hz |
Inputs & Outputs
| Parameter | Value |
|---|---|
| Input Connector Location Options | Front panel (standard), Rear panel (Option 002) |
Reference Oscillator
| Parameter | Value |
|---|---|
| Reference Oscillator Impedance | 50 Ω (75 Ω with Option 003) |
| Reference Oscillator SWR | < 1.05 |
Performance
| Parameter | Value |
|---|---|
| Zero Carryover | < ±0.5% of full scale when zeroed on the most sensitive range |
Technology
RF & Microwave Power Measurement (Analog)
Applications
Analog RF Power Measurement, Sensor Calibration, Field Testing