If you need to measure tiny power levels with confidence, the Keysight N432A is the tool that removes guesswork. This thermistor power meter works from 100 kHz up to 18 GHz, so it fits a wide range of lab and field projects. Engineers often struggle with inaccurate readings when their meter cannot handle the frequency span or the low-power range they need. With this meter you get reliable data, faster setup, and less re-work.
Keysight N432A,100 kHz to 18 GHz frequency Range, Thermistor Power Meters
Many test setups fail because the power meter cannot follow the sensors frequency limits. That leads to missed specifications and costly redesigns. The problem matters when you are tuning amplifiers, validating filters, or certifying wireless devices. The N432A solves it by accepting Keysight 478A and 8478B thermistor sensors, covering the full 100 kHz-18 GHz band, and delivering 0.1 % accuracy after zero and calibration. It gives you a clear, repeatable measurement every time.
Key Features
- Frequency range: 100 kHz - 18 GHz (sensor dependent)
- Power range: -30 to +10 dBm (1 W - 10 mW)
- Compatible with Keysight 478A and 8478B thermistor sensors
- Meter power absolute accuracy: (0.1 % of reading + 0.5 W)
- Voltage accuracy: (0.0035 % of reading + 50 V) for VRF & VCOMP
- Power resolution selectable to 0.001 dB (log) or 4 significant digits (linear)
- Voltage resolution: 6.5 digits for VDC and mVDC
- Display can show power in Watts or dBm, voltage in VDC/mVDC, and resistance in
- Zero and calibration procedure required for full accuracy
Specifications
| General |
|
| Frequency Range |
100 kHz to 18 GHz (sensor dependent) |
| Power Range |
–30 to +10 dBm (1 μW to 10 mW), thermistor-sensor dependent |
| Compatible Power Sensors |
Keysight 478A Thermistor Sensor (100 kHz to 10 GHz, Option H63) |
| |
Keysight 8478B Thermistor Sensor (10 MHz to 18 GHz) |
| Warm-Up Time |
30 minutes |
| Zero & Calibration |
Specifications valid after performing zero and calibration procedure |
| Measurement Accuracy |
|
| Meter Power Absolute Accuracy |
± (0.1% of reading + 0.5 μW) |
| Meter Voltage Accuracy (VRF & VCOMP, 23 °C ± 5 °C) |
± (0.0035% of reading + 50 μV of range) |
| Meter Voltage Accuracy (V0 & V1, 23 °C ± 5 °C) |
± (0.0040% of reading + 25 μV of range) |
| Bridge Characteristics |
|
| Bridge Resistance |
100 Ω, 200 Ω, 300 Ω, or 400 Ω (user selectable) |
| Display Units |
|
| Power |
Watts (W) or dBm |
| Relative Measurement |
Percent (%) or dB |
| Voltage |
VDC and mVDC (VRF, VCOMP, V0, V1) |
| Bridge Resistance |
Ohm (Ω) |
| Display Resolution |
|
| Power Resolution |
Selectable: 1.0, 0.1, 0.01, or 0.001 dB (log mode); 1, 2, 3, or 4 significant digits
(linear mode)
|
| Default Power Resolution |
0.01 dB (log mode) or 3 significant digits (linear mode) |
| Voltage Resolution |
6.5 digits |
| Bridge Resistance Resolution |
6.5 digits |
