The Keysight Agilent 8648A is a reliable, high-performance synthesized RF signal generator spanning 100 kHz to 1000 MHz. Designed for receiver testing and general-purpose bench applications, it delivers clean, precise signals with excellent level accuracy and low single-sideband phase noise.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 100 kHz |
| Maximum Frequency | 1000 MHz |
| Frequency Resolution | 0.001 Hz |
| Frequency Range | 100 kHz to 1000 MHz |
| Frequency Reference Aging Rate | < 2 ppm/year (standard), < 0.1 ppm/year (Option 1E5) |
Output
| Parameter | Value |
|---|---|
| Maximum Output Power | +10 dBm |
| Output Power Range | -136 to +10 dBm |
| Phase Noise | <-120 dBc/Hz (at 20 kHz offset, 500 MHz carrier) |
Modulation
| Parameter | Value |
|---|---|
| Modulation | AM, FM, Phase |
| External Modulation Input Impedance | 600 Ω (nominal) |
| External Modulation Input Voltage | 1 Vpeak for specified deviation or depth |
General
| Parameter | Value |
|---|---|
| Reference Oscillator | 10 MHz |
Amplitude and Output Power
| Parameter | Value |
|---|---|
| Amplitude Resolution | 0.1 dB |
| Amplitude Accuracy | ±1.0 dB (levels >= -127 dBm) |
| Output Impedance | 50 Ohms |
| Maximum Reverse Power Protection | 50 Watts (from 50 ohm source), 50 VDC |
Amplitude Modulation (AM)
| Parameter | Value |
|---|---|
| AM Depth Range | 0% to 100% (for levels <= +4 dBm) |
| AM Resolution | 0.1% AM |
| AM Depth Accuracy | ±(6% of setting + 1%) at 1 kHz rate |
| AM Distortion | < 2% (at 1 kHz, 30% depth) |
Internal Modulation Source
| Parameter | Value |
|---|---|
| Internal Modulation Waveforms | Sine |
| Internal Modulation Frequencies | 400 Hz, 1 kHz (standard); 10 Hz to 20 kHz with Option 1E2 |
Inputs and Outputs
| Parameter | Value |
|---|---|
| Modulation Input Connector | BNC female (front panel) |
| Internal Modulation Output Connector | BNC female (front panel) |
| 10 MHz Reference Input | BNC female (rear panel) |
| 10 MHz Reference Output | BNC female (rear panel) |
System and Remote Control
| Parameter | Value |
|---|---|
| Remote Control Interface | GPIB (IEEE-488) |
| Command Languages | SCPI |
Power and Physical Specifications
| Parameter | Value |
|---|---|
| Line Voltage Requirements | 90 V to 264 V AC |
| Power Consumption | 170 VA maximum |
Remote Control
| Parameter | Value |
|---|---|
| Command Emulation Modes | HP 8656B, HP 8657A, HP 8657B |
Performance
| Parameter | Value |
|---|---|
| Attenuator Technology | Electronic (solid-state) |
| Maximum Reverse DC Voltage | 50 Vdc |
Technology
Synthesized Signal Generator
Applications
RF Receiver Testing and General Purpose Lab Measurements