The Keysight (Agilent/HP) 8645A is a high-performance, frequency-agile synthesized signal generator designed for demanding fast-switching and multi-modulation test applications. Highly optimized for frequency-agile radios and surveillance receiver testing, it offers low phase noise alongside sub-millisecond frequency switching speed, making it an industry-standard solution for both static and agile RF testing.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 252 kHz |
| Maximum Frequency | 2.06 GHz |
| Frequency Resolution | 1 Hz |
Output
| Parameter | Value |
|---|---|
| Maximum Output Power | +16 dBm |
| Output Power Range | +16 to -137 dBm |
| Phase Noise | -129 dBc/Hz at 20 kHz offset (1 GHz carrier) |
Modulation
| Parameter | Value |
|---|---|
| Modulation | AM, FM, Phase, Pulse |
| Sweep Modes | Digital stepped sweep and analog phase-continuous sweep |
| Pulse Modulation Rise/Fall Time | < 35 ns |
| Pulse Modulation On/Off Ratio | > 80 dB |
| FM Maximum Deviation | Up to 20 MHz (configuration and carrier dependent) |
| Amplitude Modulation Depth | 0 to 99% |
General
| Parameter | Value |
|---|---|
| Reference Oscillator | 10 MHz (Standard: < 1.5 x 10^-9/day aging; Option 001: < 5 x 10^-10/day aging) |
| Interfaces | GPIB, TTL control |
| Display | Backlit LCD |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 / 120 / 220 / 240 VAC (+10%, -15%), 48 to 440 Hz, max 400 VA |
| Dimensions (W×H×D) | 425 mm x 177 mm x 624 mm |
| Weight | 31.5 kg |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Switching Speed | < 15 µs (from 128 to 2060 MHz) |
Analog Modulation
| Parameter | Value |
|---|---|
| Simultaneous Modulation | Simultaneous FM, AM, and pulse modulation capabilities |
Amplitude Specifications
| Parameter | Value |
|---|---|
| Output Impedance | 50 Ω nominal |
RF Output
| Parameter | Value |
|---|---|
| Harmonics | < -30 dBc |
| Non-harmonic Spurious | < -100 dBc (at offsets > 10 kHz, < 1030 MHz) |
| Output SWR | < 1.5:1 (output levels < +10 dBm) |
Options
| Parameter | Value |
|---|---|
| High-Frequency Option (Option 002) | Extends frequency range up to 2060 MHz |
Protection
| Parameter | Value |
|---|---|
| Reverse Power Protection | 50 W (from 50 Ω source), 25 VDC |
Environmental
| Parameter | Value |
|---|---|
| Operating Temperature Range | 0 °C to +55 °C |
| Storage Temperature Range | -55 °C to +75 °C |
Technology
Synthesized Signal Generation
Applications
Frequency-agile radio testing, surveillance receiver evaluation, electronic warfare simulation, and multi-modulation signal simulation