HP / Agilent 3335A Synthesizer/Level Generator

The HP/Agilent 3335A Synthesizer/Level Generator delivers precise, stable signal generation from 200 Hz to 81 MHz with 0.001 Hz resolution. This dual-function instrument combines a synthesized signal source with programmable level control and sweep capabilities, making it ideal for telecommunications testing, R&D measurement, and production verification. The 3335A operates as a tracking generator when paired with selective level measuring equipment, and offers exceptional frequency stability and spectral purity across its entire range.

## Technical Specifications

**Frequency Performance**
• Range: 200 Hz to 81 MHz (standard); extended ranges available with options for 750 Hz start frequency and alternate impedances
• Resolution: 0.001 Hz
• Stability (long-term): ±1 × 10⁻¹⁰/day; ±1 × 10⁻⁷/month; ±1 × 10⁻⁸/day with internal temperature-controlled oscillator
• Option 001 high-stability reference: ±5 × 10⁻⁸/day aging rate

**Signal Quality**
• Harmonic distortion: <−45 dBc (200 Hz–10 MHz); <−40 dBc (10–80 MHz)
• Phase noise: −63 dBc @ 9.9 MHz; −70 dBc @ 20 MHz; −64 dBc @ 40 MHz; −58 dBc @ 80 MHz
• Spurious signals: greater of −75 dBc or −125 dBm (50/75 Ω)

**Amplitude Control**
• Output range: −86.98 to +13.01 dBm (50 Ω); −88.74 to +11.25 dBm (75 Ω)
• Resolution: 0.01 dB
• Absolute accuracy: ±0.05 dB (50/75 Ω); ±0.1 dB (124/135/1500 Ω) at 100 kHz
• Flatness: ±0.07 dB (1 kHz–25 MHz, 50/75 Ω); ±0.15 dB (200 Hz–80 MHz, 50/75 Ω)
• Attenuator accuracy: ±0.025 dB across 81 MHz range

**Sweep Functions**
• Linear sweep: 0.01 s to 99.99 s
• Logarithmic sweep: 2 s to 99.99 s (single); 0.1 s to 99.99 s (continuous)
• Phase-continuous frequency sweeping over any range

## Key Features

• Multiple output impedance options: 50 Ω, 75 Ω, 124 Ω, 135 Ω, 150 Ω, 1500 Ω
• HP-IB programmability per IEEE Standard 488-1975
• Tracking generator compatibility with HP 3746A/B SLMS and HP 3586A/B/C selective level meters
• Compact form factor: 132.6 mm H × 425.5 mm W × 497.8 mm D; 10 kg net

## Typical Applications

• Telecommunications system characterization
• Component and subsystem testing
• Production acceptance testing
• Network analyzer source operations