The Keysight (Agilent HP) 11909A is a low noise amplifier operating from 9 kHz to 1 GHz. Providing a typical gain of 32 dB and an exceptionally low noise figure, it is designed to significantly improve the sensitivity of test systems, spectrum analyzers, and receivers. It is particularly well-suited for EMI troubleshooting when paired with the Agilent 11940A and 11941A close-field probes.
Specifications
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 / 120 / 220 / 240 V AC (+10%, -15%), 47 to 66 Hz |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 110 mm × 117 mm × 216 mm |
Frequency and Bandwidth Characteristics
| Parameter | Value |
|---|---|
| Lower Frequency Limit | 9 kHz |
| Upper Frequency Limit | 1 GHz |
Gain and Amplitude Performance
| Parameter | Value |
|---|---|
| Nominal Gain | 32 dB ± 1.5 dB @ 100 MHz |
| Gain Flatness | ±0.5 dB (25 kHz to 800 MHz) |
| Output 1 dB Compression Point (P1dB) | +10 dBm |
| Maximum Safe Input Voltage (DC) | ±2 V DC |
| Maximum Input for Linear Operation | ±24 mV (approximate) |
Impedance and Port Characteristics
| Parameter | Value |
|---|---|
| Input Impedance | 50 ohms |
| Output Impedance | 50 ohms |
| Input Return Loss | 8 dB |
| Output Return Loss | 10 dB |
| RF Input Connector Type | Type-N female |
| RF Output Connector Type | Type-N female |
Compliance, Standards and Calibration
| Parameter | Value |
|---|---|
| Recommended Accessories | Agilent 11940A & 11941A close-field probes |
Performance
| Parameter | Value |
|---|---|
| Output Third-Order Intercept Point (OIP3) | +22 dBm (typical) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +75 °C |
| Operating Humidity | 95% RH at 40 °C (non-condensing) |
Electrical Specifications
| Parameter | Value |
|---|---|
| Maximum Safe AC Input Level | +13 dBm (1.0 V rms) |
Technology
Solid State LNA
Applications
Receiver sensitivity improvement, radiated emissions testing, and close-field EMI probing