The Keysight (Agilent HP) 3335A is a high-precision Synthesizer/Level Generator designed for telecommunications testing, calibration, and precise R&D applications. Operating across a frequency range of 200 Hz to 81 MHz, it is celebrated for its unmatched level flatness of ±0.05 dB, superb frequency resolution, and standard HP-IB system compatibility.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (IEEE-488) |
| Display | 7-segment red LED digital display for frequency, amplitude, and parameters |
| Warm-up Time | 20 minutes (standard), 24 hours (Option 001) |
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 425.5 mm × 132.6 mm × 497.8 mm |
| Weight | 19 kg |
Frequency Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 200 Hz to 80.999 999 999 MHz |
| Frequency Resolution | 0.001 Hz (1 mHz) |
| Frequency Reference Aging Rate | < 1 × 10^-8 per day (standard); < 5 × 10^-10 per day (with high-stability Option 001) |
| Phase Offset Adjustability | Adjustable in 0.1° increments |
Amplitude and Level Control
| Parameter | Value |
|---|---|
| Output Level Range (50 Ω) | -86.98 dBm to +13.01 dBm |
| Output Level Range (75 Ω) | -86.96 dBm to +13.01 dBm |
| Amplitude Resolution | 0.01 dB |
| Output Impedance | Dual front panel outputs: 50 Ω and 75 Ω (individually selectable) |
Spectral Purity
| Parameter | Value |
|---|---|
| Harmonics | < -40 dBc (10 MHz to 80 MHz); < -45 dBc (200 Hz to 10 MHz) |
| Non-Harmonic Spurious | < -70 dBc |
| SSB Phase Noise (10 kHz offset, 80 MHz carrier) | <-105 dBc/Hz |
| SSB Phase Noise (10 kHz offset, 10 MHz carrier) | <-112 dBc/Hz |
Sweep and List Modes
| Parameter | Value |
|---|---|
| Sweep Types | Single, Auto, and Manual step sweep |
Inputs and Outputs
| Parameter | Value |
|---|---|
| RF Output Connector Type | Dual BNC (one 50 Ω, one 75 Ω) on front panel |
| External Reference Input Frequency | Accepts 1, 2, 5, or 10 MHz references (internal system locks to 40 MHz) |
| Internal Reference Output Frequency | 10 MHz |
Physical Characteristics
| Parameter | Value |
|---|---|
| Form Factor | Standard HP full-width benchtop instrument with rackmount capability |
| Rack Unit Height | 3U |
Performance
| Parameter | Value |
|---|---|
| Amplitude Flatness (50 Ω) | ±0.15 dB (10 kHz to 80 MHz, relative to 100 kHz) |
| Amplitude Flatness (75 Ω) | ±0.15 dB (10 kHz to 80 MHz, relative to 100 kHz) |
| Phase Increment | 0.1° |
| Option 002 Balanced Output Impedances | 124 Ω, 135 Ω, 150 Ω, 600 Ω |
| Option 002 Balanced Output Frequency Ranges | 124 Ω: 10 kHz to 10 MHz; 135 Ω & 150 Ω: 10 kHz to 2 MHz; 600 Ω: 10 kHz to 150 kHz |
| Frequency Reference Temperature Stability (Standard) | < ±1 × 10^-6/°C |
| Frequency Reference Temperature Stability (Option 001) | ±2 × 10^-10/°C (0 °C to 55 °C) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +75 °C |
Inputs & Outputs
| Parameter | Value |
|---|---|
| Rear Panel Analog Sweep Outputs | X-Drive (0 to 10 V) and Z-Blanking/Pen Lift |
Frequency Reference
| Parameter | Value |
|---|---|
| Option 001 Reference Aging Rate | < 5 × 10^-10 per day (after 10 days warm-up) |
| External Reference Input Level | 0 dBm to +15 dBm |
| External Reference Input Impedance | 50 Ω |
| Internal Reference Output Level (1 MHz / 10 MHz) | ≥ 0 dBm into 50 Ω |
RF Output Characteristics
| Parameter | Value |
|---|---|
| Return Loss (50/75 Ω Unbalanced, 200 Hz - 10 MHz) | ≥ 30 dB |
| Return Loss (50/75 Ω Unbalanced, 10 MHz - 50 MHz) | ≥ 26 dB |
| Return Loss (50/75 Ω Unbalanced, 50 MHz - 80 MHz) | ≥ 23 dB (50 MHz - 81 MHz) |
Sweep Characteristics
| Parameter | Value |
|---|---|
| Sweep Steps Range | 10 to 999 steps |
| Sweep Time per Step Range | 10 ms to 99.9 s |
Option 002 Balanced Output
| Parameter | Value |
|---|---|
| Option 002 Balanced Output Level Range (124/135/150 Ω) | -86.98 dBm to +13.01 dBm |
| Option 002 Balanced Output Level Range (600 Ω) | -83.98 dBm to +16.01 dBm |
| Option 002 Balanced Output Flatness (124/135/150 Ω) | ±0.15 dB (10 kHz to 2 MHz) |
| Option 002 Balanced Output Flatness (600 Ω) | ±0.15 dB (50 Hz to 50 kHz) |
| Option 002 Balance (124/135/150 Ω) | > 40 dB (10 kHz to 2 MHz) |
| Option 002 Balance (600 Ω) | > 40 dB (50 Hz to 50 kHz) |
Technology
Fractional-N Synthesis
Applications
Telecommunications testing, calibration, precise level-selective measurements