Keysight (Agilent)
Keysight (Agilent) 8904A
DC-600KHz Multifunction Synthesiser
0.01 Hz to 600 kHz Frequency Range
Up to 7 Vrms (into 600 Ω load) Output Voltage
Less than -80 dBc typical at 1 kHz Distortion
600 Ω or 50 Ω selectable Output Impedance
AM, FM, PM, and dual-tone modulation Modulation Types

| Attribute | Value |
|---|---|
| Frequency Range | 0.01 Hz to 600 kHz |
| Output Voltage | Up to 7 Vrms (into 600 Ω load) |
| Distortion | Less than -80 dBc typical at 1 kHz |
| Output Impedance | 600 Ω or 50 Ω selectable |
| Modulation Types | AM, FM, PM, and dual-tone modulation |
| Frequency Resolution | 0.01 Hz |
| Number of Output Channels | Up to 4 independent output channels (with optional modules) |
| Interface | GPIB (IEEE-488) standard interface |
| Power Requirements | 100/120/220/240 VAC, 48–66 Hz |
| Operating Temperature Range | 0°C to 55°C |
Keysight Technologies 8904A Options:
- 8904A - Opt 001 - Adds three (two when ordered with Option 002) internal channels, Channel A modulation, summation, FM stereo mode, and sequence capability
- 8904A - Opt 002 - Adds second internal synthesizer and output
- 8904A - Opt 003 - Adds fast hop and digital modulation
- 8904A - Opt 004 - Connectors on rear panel only (not available with Option 005 or 006)
- 8904A - Opt 005 - Adds unit to unit phase synchronization
- 8904A - Opt 006 - Changes output 1 from a 50 Ω output to a transformer-coupled, 600 Ω balanced output
- 8904A - Opt 910 - Provides an additional operation and calibration manual (08904-90007) and two service manuals (08904-90008)
- 8904A - Opt 915 - Adds Service Manual (08904-90008)
- 8904A - Opt W30 - Extended Repair Service
- 8904A - Opt W32 - Calibration Service
| Model | 8904A |
|---|
The Keysight (Agilent) 8904A Multifunction Synthesized Generator delivers precision waveform generation with sine output from 0 Hz to 600 kHz and 0.1 Hz resolution. It also generates square, triangle, and ramp waveforms up to 50 kHz and includes DC output. Built on 12-bit direct digital synthesis, the 8904A supports advanced modulation formats—AM, FM, Phi-M, DSBSC, and pulse modulation—and offers up to four internal channels for flexible signal combinations.
Operational modes include tone, DTMF, digital patterns, and Hop RAM sequencing. Configurations support one or two outputs with optional unit-to-unit phase synchronization, making it ideal for audio, telecom, and control system testing.
Testwall can supply the used Keysight (Agilent) 8904A, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Keysight (Agilent) 8904A.





