The Keysight (formerly Agilent / Hewlett-Packard) 8648B is an economical synthesized signal generator designed for semi-automated receiver test and general-purpose RF applications. Built to stringent quality standards for high reliability and measurement repeatability, it offers wide frequency coverage from 9 kHz to 2 GHz. It features superior level accuracy, standard AM, FM, and Phase modulation capabilities, and supports optional pulse modulation and high power extensions.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 9 kHz |
| Maximum Frequency | 2 GHz |
| Frequency Resolution | 0.001 Hz |
| Timebase Aging Rate (Standard) | ±2 ppm/year |
| Timebase Temperature Stability (Standard) | ±1 ppm (0 °C to 50 °C) |
| Timebase Temperature Stability (Option 1E5) | ±0.01 ppm (0 °C to 50 °C) |
Output
| Parameter | Value |
|---|---|
| Maximum Output Power | +13 dBm |
| Output Power Range | -136 dBm to +13 dBm |
Modulation
| Parameter | Value |
|---|---|
| Modulation | AM, FM, Phase, Pulse (optional) |
| Internal Modulation Source | 400 Hz or 1 kHz (Option 1E2: 10 Hz to 20 kHz) |
| AM Depth | 0 to 100% |
| AM Resolution | 0.1% |
| Internal Modulation Frequencies | 400 Hz and 1 kHz (standard); 10 Hz to 20 kHz (Option 1E2) |
General
| Parameter | Value |
|---|---|
| Reference Oscillator | 10 MHz (Standard aging: ±2 ppm/year; Option 1E5: <0.1 ppm/year) |
| Interfaces | GPIB (IEEE-488) |
| Display | LCD |
| Recommended Calibration Cycle | 2 years |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 90 to 264 VAC, 48 to 440 Hz |
| Dimensions (W×H×D) | 330 x 165 x 368 mm |
| Weight | 8.5 kg |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 9 kHz to 2000 MHz |
Amplitude Specifications
| Parameter | Value |
|---|---|
| Output Power Resolution | 0.1 dB |
| Absolute Level Accuracy | ±1 dB |
| Output Impedance | 50 Ω |
| Reverse Power Protection (RF) | 50 W |
Spectral Purity
| Parameter | Value |
|---|---|
| Harmonics | <-30 dBc |
General Specifications
| Parameter | Value |
|---|---|
| Available Options | High Power (Option 1EA), Pulse Modulation (Option 1E6) |
Connectivity and Interfaces
| Parameter | Value |
|---|---|
| RF Output Connector | Type-N (female) |
| Remote Programming Interface | GPIB |
Environmental
| Parameter | Value |
|---|---|
| Operating Temperature | 0 °C to +50 °C |
| Storage Temperature | -40 °C to +71 °C |
Power
| Parameter | Value |
|---|---|
| Power Consumption | 170 VA maximum |
Inputs & Outputs
| Parameter | Value |
|---|---|
| External Modulation Input Impedance | 600 Ω |
| Timebase Reference Output | 10 MHz, > 50 mVrms into 50 Ω |
| External Modulation Input Connectors | BNC female (front panel) |
RF Output
| Parameter | Value |
|---|---|
| Reverse Power Protection (DC Voltage) | 50 Vdc |
Technology
Synthesized RF Signal Generator
Applications
Semi-automated receiver test, general-purpose RF testing