The HP / Agilent / Keysight 8904A is a multifunction synthesizer utilizing 12-bit Direct Digital Synthesis (DDS) to provide highly accurate signals. It is capable of generating sine waves up to 600 kHz and square, ramp, and triangle waves up to 50 kHz. The unit can be configured with up to four internal channels and two physical outputs, supporting complex modulation schemes including AM, FM, phase modulation, DSBSC, and pulse modulation, as well as specialized modes like DTMF and unit-to-unit phase synchronization.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (IEEE-488) |
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to +50 °C |
Frequency Characteristics
| Parameter | Value |
|---|---|
| Waveforms Supported | Sine, square, ramp, triangle |
| Frequency Range (Sine) | DC to 600 kHz |
| Frequency Range (Square) | DC to 50 kHz |
| Frequency Range (Triangle) | DC to 50 kHz |
| Frequency Range (Ramp) | DC to 50 kHz |
Amplitude and DC Offset Characteristics
| Parameter | Value |
|---|---|
| Output Channels | 1 or 2 (configuration dependent) |
| Internal Synthesizer Channels | 1 to 4 (configuration dependent) |
Modulation Characteristics
| Parameter | Value |
|---|---|
| Modulation Types | AM, FM, Phase Modulation (Φ-M), DSBSC, Pulse |
Phase and Multi-Channel Performance
| Parameter | Value |
|---|---|
| Phase Synchronization | Unit-to-unit synchronization |
Frequency
| Parameter | Value |
|---|---|
| Frequency Resolution | 0.1 Hz |
Outputs
| Parameter | Value |
|---|---|
| Output Impedance | 50 Ω |
| Maximum Output Level | 10 Vp-p (into 50 Ω) |
| Output Connector | BNC |
Performance
| Parameter | Value |
|---|---|
| Phase Resolution | 0.1° |
Waveforms
| Parameter | Value |
|---|---|
| White Noise Generation | Available with Option 001 |
Options & Configurations
| Parameter | Value |
|---|---|
| Option 001 | Adds 3 internal synthesizer channels (4 total), internal modulation, and white noise |
| Option 002 | Adds a second independent output channel (Channel B) |
| Option 003 | Adds fast frequency hopping and digital modulation capabilities |
Technology
Direct Digital Synthesis (DDS)
Applications
Multifunction signal generation, baseband test, telecommunications (DTMF)