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The HP 3325B is a 1 µHz to 21 MHz synthesizer/function generator designed for high-performance signal generation on the bench and in automated test systems. It combines synthesizer-grade frequency precision with the waveform versatility of a function generator, producing sine, square, triangle, positive and negative ramps, and user-defined arbitrary waveforms. The instrument provides 1 µHz frequency resolution below 100 kHz and 1 mHz resolution at and above 100 kHz, with frequency accuracy of ±5 × 10⁻⁶ at 20°C to 30°C at the time of calibration.
The 3325B is used in general-purpose bench applications and in HP-IB-controlled ATE systems where its synthesized accuracy and waveform flexibility serve as a single source for stimulus testing. Precision squarewaves up to 10.999,999 MHz have 20 ns rise times with synthesizer accuracy and precision, and triangle and ramp waveshapes are available with 0.05 percent linearity up to 10.999,999 kHz. DC offset can be added to the standard waveforms, and the internal modulation source can be used to deliver user-defined waveshapes, allowing the 3325B to act as an arbitrary function generator via HP-IB.
ValueTronics International has supplied new and used test and measurement equipment from our facility in Elgin, Illinois since 1992. The HP 3325B units we offer are stored and tested at our 20,000 square foot secure warehouse at 1675 Cambridge Drive, where our technicians inspect each instrument before it ships. Working with ValueTronics rather than an unverified marketplace source means the synthesizer arrives with documented condition, the accessories you expect, and a direct line to the person who handled your order if anything needs follow-up.
Hewlett-Packard's test and measurement business was spun out as Agilent Technologies in 1999, and the electronic measurement portion of Agilent became Keysight Technologies in 2014. The HP 3325B is a product of the original Hewlett-Packard era; calibration support and documentation for instruments of this lineage routes through Keysight today.
| Specification | Value |
|---|---|
| Waveforms | |
| Functions | Sine, square, triangle, negative and positive ramps |
| Frequency | |
| Sine Range | 1 µHz to 20.999 999 999 MHz |
| Square Range | 1 µHz to 10.999 999 999 MHz |
| Triangle/Ramps Range | 1 µHz to 10.999 999 999 kHz |
| Resolution | 1 µHz, < 100 kHz; 1 mHz, ≥ 100 kHz |
| Accuracy | ±5 × 10⁻⁶, 20° to 30° C at time of calibration |
| Warm-up time | 20 minutes to within specified accuracy |
| Main Signal Output (all waveforms) | |
| Impedance | 50 Ω |
| Connector | BNC; switchable to front or rear panel, nonswitchable with Option 002, except by internal cable change. |
| Amplitude | |
| Range | 1 mV to 10 Vp-p in 8 amplitude ranges, 1-3-10 sequence (10 dB steps), into 50 Ω load |
| Sine peak-peak (min/max) | 1.000 mV / 10.00 V |
| Sine rms (min/max) | 0.354 mV / 3.536 V |
| Sine dBm 50 Ω (min/max) | -56.02 / +23.98 |
| Square peak-peak (min/max) | 1.000 mV / 10.00 V |
| Square rms (min/max) | 0.500 mV / 5.000 V |
| Square dBm 50 Ω (min/max) | -53.01 / +26.99 |
| Triangle/Ramps peak-peak (min/max) | 1.000 mV / 10.00 V |
| Triangle/Ramps rms (min/max) | 0.289 mV / 2.887 V |
| Triangle/Ramps dBm 50 Ω (min/max) | -57.78 / +22.22 |
| Resolution | 0.03% of full range or 0.01 dB (4 digits) |
| Sine Wave Amplitude Accuracy | |
| 1 mHz to 100 kHz | ±0.1 dB, ≥ 3 Vpp; ±0.2 dB, < 3 Vpp |
| 100 kHz to 20 MHz | ±0.4 dB, ≥ 3 Vpp; ±0.6 dB, 0.1 to 3 Vpp |
| Sine Wave Spectral Purity | |
| Phase noise | -60 dB for a 30 kHz band centered on a 20 MHz carrier (excluding ±1 Hz about the carrier) with high-stability Option 001 installed. |
| Spurious | All non-harmonically related output signals will be more than 70 dB below the carrier (60 dB with dc offset) or less than -90 dBm, whichever is greater. |
| Sine Wave Harmonic Distortion (relative to fundamental at full output) | |
| 0.1 Hz | -65 dB |
| 50 kHz | -60 dB |
| 200 kHz | -40 dB |
| 2 MHz | -30 dB |
| 15 MHz | -25 dB |
| 20 MHz | -25 dB |
| Square Wave Characteristics | |
| Rise/fall time | ≤ 20 ns, 10% to 90% at full output |
| Overshoot | ≤ 5% of peak-to-peak amplitude, at full output |
| Settling time | < 1 µs to settle to within .05% of final value |
| DC Offset | |
| Range | dc only (no ac signal): 0 to ±5.0 V/50 Ω |
| dc + ac | Maximum dc offset ±4.5 V on highest range, decreasing to ±4.5 mV on lowest range. |
| Resolution | 4 digits |
| Sine Wave Amplitude Modulation | |
| Modulation depth at full output for each range | 0 to 100% |
| Modulation frequency range | dc to 400 kHz (0 to 21 MHz carrier frequency) |
| Sensitivity | ±5 V peak for 100% modulation |
| Sine Wave Phase Modulation | |
| Range | ±850°, ±5 V input |
| Modulation frequency range | dc - 5 kHz |
| Frequency Sweep | |
| Sweep time - Linear | 0.01 s to 1000 s |
| Sweep time - Logarithmic | 1 s to 1000 s single, 0.1 s to 1000 s continuous |
| Discrete sweep - Number of segments | 100 maximum |
| Discrete sweep - Time/Segment | 0.01 s to 1000 s, 0.01 s resolution |
| Maximum sweep width | Full frequency range of the main signal output for the waveform in use, except minimum log start frequency is 1 Hz. |
| Phase continuity | Sweep is phase continuous over the full frequency range of the main output. |
| Modulation Source | |
| Frequency range | Sine 0.1 Hz to 10 kHz, square 0.1 Hz to 2 kHz |
| Frequency accuracy | 0.1%, typical |
| Impedance | Drives 10 kΩ or greater load |
| Sinewave purity | -34 dBc or better, typical |
| Waveforms | Sine, square, arbitrary |
| Auxiliary Inputs and Outputs | |
| Auxiliary frequency output | 21 MHz to 60.999 999 999 MHz, under range coverage to 19.000 000 001 MHz, frequency selection from front panel; 0 dBm; output impedance 50 Ω. |
| Sync output | Square wave with V (high) ≥ 1.2 V, V (low) ≥ 0.2 V into 50 Ω. Frequency range is the same as main signal for front panel sync and dc to 60 MHz for rear panel sync. |
| X-Axis drive | 0 to > +10 V dc linear ramp proportional to sweep frequency, linearity, 10-90%, ±0.1% of final value |
| MATE/CIIL Compatibility | |
| MATE system applications | Option H05 provides internal CIIL compatibility. |
| Option 001 High Stability Frequency Reference | |
| Aging rate | ±5 × 10⁻⁸/week (72 hr warm up); ±1 × 10⁻⁷/month (after 15 days continuous operation). |
| Ambient stability | ±5 × 10⁻⁸ (0° C to +55° C) |
| Warm-up time | Reference will be within ±1 × 10⁻⁷ of final value 15 minutes after turn-on for an off time of less than 24 hours. |
| Option 002 High Voltage Output | |
| Frequency range | 1 µHz to 1 MHz |
| Amplitude Range | 4.00 mVpp to 40.00 Vpp (≥ 500 Ω, ≤ 500 pF load) |
| Accuracy | ±2% of full output for each range at 2 kHz |
| Output impedance | < 2 Ω at dc, < 10 Ω at 1 MHz |
| dc offset range | 4 times the specified range of the standard instrument. |
| General | |
| Operating Temperature | 0° C to 55° C |
| Relative humidity | 95%, 0° C to 40° C |
| Altitude | ≤ 15,000 ft |
| Power | 100, 120, 220, 240 V, +5%, -10%, 48 to 66 Hz; 90 VA, 120 VA with all options; 10 VA standby |
| Weight | 9 kg (20 lb) net; 14.5 kg (32 lb) shipping |
| Size | 132.6 mm H × 425.5 mm W × 497.8 mm D (5.25 in × 16.75 in × 19.63 in) |
Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.
Model No
HP
Condition
Used
Manufacturer
Agilent
Frequency
21 MHz
1
Hi Stability Reference
2
High Power
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