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The Agilent 35670A is a dynamic signal analyzer that performs FFT-based spectrum and network analysis from 122 µHz to 102.4 kHz using a 16-bit ADC architecture. It is configurable as a two-channel instrument with single-channel and dual-channel measurement modes, and Option AY6 extends the instrument to four input channels. The analyzer combines spectrum measurement, network measurement, time capture, histogram analysis, and correlation analysis in a single chassis.
A dynamic signal analyzer captures voltage signals over time and uses fast Fourier transform processing to translate them into the frequency domain, allowing an engineer to measure spectral content, frequency response, coherence, and cross-channel relationships between two or more signals. The 35670A's measurement set includes frequency response, linear spectrum, cross spectrum, power spectrum, coherence, power spectral density, time waveform, autocorrelation, cross-correlation, orbit diagrams, and histogram/PDF/CDF analysis. Trace coordinates available on the instrument include linear and log magnitude, dB magnitude, group delay, phase, unwrapped phase, real and imaginary parts, Nyquist, and polar formats.
ValueTronics International, LLC has been a specialist source for test and measurement equipment since 1992. Our 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois serves as the central facility where instruments are received, inspected, performance-tested against manufacturer published specifications, and graded by our technicians before they ship. This in-house verification process is the operational difference between a unit accompanied by a documented condition report and an unverified marketplace listing, and it is the basis on which our warranty and post-sale support are extended.
Hewlett-Packard's test and measurement division was spun off as Agilent Technologies in 1999. In 2014, Agilent's electronic measurement business was transferred to Keysight Technologies, which is the current corporate successor for instruments originally branded HP and subsequently Agilent.
| Category | Parameter | Specification |
|---|---|---|
| Frequency | Maximum range, 1 channel mode | 102.4 kHz (51.2 kHz with Option AY6) |
| Frequency | Maximum range, 2 channel mode | 51.2 kHz |
| Frequency | Maximum range, 4 channel mode (Option AY6 only) | 25.6 kHz |
| Frequency | Spans, 1 channel mode | 195.3 mHz to 102.4 kHz |
| Frequency | Spans, 2 channel mode | 97.7 mHz to 51.2 kHz |
| Frequency | Spans, 4 channel mode (Option AY6 only) | 97.7 mHz to 25.6 kHz |
| Frequency | Minimum resolution, 1 channel mode | 122 µHz (1600 line display) |
| Frequency | Minimum resolution, 2 channel mode | 61 µHz (1600 line display) |
| Frequency | Minimum resolution, 4 channel mode (Option AY6 only) | 122 µHz (800 line display) |
| Frequency | Maximum real-time bandwidth, 1 channel mode | 25.6 kHz |
| Frequency | Maximum real-time bandwidth, 2 channel mode | 12.8 kHz |
| Frequency | Maximum real-time bandwidth, 4 channel mode (Option AY6 only) | 6.4 kHz |
| Frequency | Measurement rate, 1 channel mode (typical) | ≥ 70 averages/sec |
| Frequency | Measurement rate, 2 channel mode (typical) | ≥ 33 averages/sec |
| Frequency | Measurement rate, 4 channel mode (typical) | ≥ 15 averages/sec |
| Frequency | Display update rate (typical) | ≥ 5 updates/sec |
| Frequency | Display update rate (maximum) | ≥ 9 updates/sec |
| Accuracy | Frequency accuracy | ±30 ppm (.003%) |
| Single Channel Amplitude | Absolute amplitude accuracy (FFT) | ±2.92% (0.25 dB) of reading; ±0.025% of full scale |
| Single Channel Amplitude | FFT full scale accuracy at 1 kHz (0 dBfs) | ±0.15 dB (1.74%) |
| Single Channel Amplitude | FFT full scale flatness (0 dBfs) relative to 1 kHz | ±0.2 dB (2.33%) |
| Single Channel Amplitude | FFT amplitude linearity at 1 kHz, +27 dBVrms range, 0 to -80 dBfs | ±0.58% (0.05 dB) of reading; ±0.025% of full scale |
| Single Channel Amplitude | Amplitude resolution (16 bits less 2 dB over-range, typical) | 0.0019% of full scale |
| Single Channel Amplitude | Residual DC response (FFT mode, excludes A-weight filter) | <-30 dBfs or 0.5 mVdc |
| FFT Dynamic Range | Spurious free dynamic range (typical, 800 line display, 50 Ω source) | 90 dB typical (<-80 dBfs) |
| FFT Dynamic Range | Harmonic distortion (single tone in-band, ≤ 0 dBfs) | <-80 dBfs |
| FFT Dynamic Range | Intermodulation distortion (two tones in-band, each ≤ -6.02 dBfs) | <-80 dBfs |
| FFT Dynamic Range | Spurious and residual responses (50 Ω source) | <-80 dBfs |
| FFT Dynamic Range | Frequency alias responses (2.5% to 97.5% of span) | <-80 dBfs |
| FFT Dynamic Range | Frequency alias responses (lower/upper 2.5% of span) | <-65 dBfs |
| Input Noise | Input noise level above 1280 Hz (flat top window, -51 dBVrms range, 50 Ω source) | <-140 dBVrms/√Hz |
| Input Noise | Input noise level, 160 Hz to 1280 Hz | <-130 dBVrms/√Hz |
| Single Channel Phase | Phase accuracy relative to external trigger | ± 4.0 deg |
| Cross-Channel Amplitude | FFT cross-channel gain accuracy (frequency response mode, same amplitude range) | ± 0.04 dB (0.46%) |
| Cross-Channel Phase | Cross-channel phase accuracy | ± 0.5 deg |
| Input | Input ranges (full scale, auto-range capability) | +27 dBVrms (31.7 Vpk) to -51 dBVrms (3.99 mVpk) in 2 dB steps |
| Input | Maximum input levels | 42 Vpk |
| Input | Input impedance | 1 MΩ ±10%, 90 µF nominal |
| Input | Low side to chassis impedance (floating mode) | 1 MΩ ±30% (typical); <0.010 µF |
| Input | Low side to chassis impedance (grounded mode) | ≤100 Ω |
| Input | AC coupling rolloff (50 Ω source) | <3 dB rolloff at 1 Hz |
| Input | Common mode rejection ratio, -51 to -11 dBVrms ranges | >75 dB typical |
| Input | Common mode rejection ratio, -9 to +9 dBVrms ranges | >60 dB typical |
| Input | Common mode rejection ratio, +11 to +27 dBVrms ranges | >50 dB typical |
| Input | Common mode range (floating mode) | ± 4 V pk |
| Input | IEPE transducer power supply current source | 4.25 ± 1.5 mA |
| Input | IEPE transducer power supply open circuit voltage | +26 to +32 Vdc |
| Input | A-weight filter | Type 0 tolerance; conforms to ANSI S1.4-1983 and IEC 651-1979; 10 Hz to 25.6 kHz |
| Input | Crosstalk (between input channels, source-to-input) | < -135 dB below signal or < -80 dBfs of receiving channel, whichever is greater |
| Time Domain | DC amplitude accuracy | ±5.0 %fs |
| Time Domain | Rise time of -1 V to 0 V test pulse | <11.4 µSec |
| Time Domain | Settling time of -1 V to 0 V test pulse | <16 µSec to 1% |
| Time Domain | Peak overshoot of -1 V to 0 V test pulse | <3% |
| Time Domain | Sampling period, 1 channel mode | 3.815 µSec to 2 Sec in 2x steps |
| Time Domain | Sampling period, 2 channel mode | 7.629 µSec to 4 Sec in 2x steps |
| Time Domain | Sampling period, 4 channel mode (Option AY6 only) | 15.26 µSec to 8 Sec in 2x steps |
| Trigger | Trigger modes | Internal, source, external (analog setting), GPIB |
| Trigger | Maximum trigger delay (post trigger) | 8191 seconds |
| Trigger | Maximum trigger delay (pre trigger) | 8191 sample periods |
| Trigger | External trigger max. input | ±42 Vpk |
| Trigger | External trigger range (low / high) | -2 V to +2 V / -10 V to +10 V |
| Trigger | External trigger resolution (low / high) | 15.7 mV / 78 mV |
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
Agilent
Condition
Used
Manufacturer
Agilent
Frequency
102 kHz
1C2
Four Input Channel Configuration
1D0
Computed order tracking
1D1
Real time octave analysis
1D2
Swept sine measurements
1D3
Curve fit/synthesis
1D4
Arbitrary waveform source
AN2
Add 4MB memory
AY6
Four Input Channel Configuration
UFC
Add 8 MB RAM
UFF
Add 1 MB nonvolatile RAM
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