# SHA851A Siglent Signal Analyzer New ### Key Features at a Glance - **Frequency:** 9 kHz to 3.6 GHz - **Functions:** Spectrum analyzer, VNA, CAA, signal generator, power meter, EMI, modulation - **DANL:** -160 dBm/Hz typical (preamp on) - **SSB Phase Noise:** -95 dBc/Hz typ. at 1 GHz, 10 kHz offset - **RBW:** 1 Hz to 10 MHz - **VNA / CAA:** S11, S21, VSWR, return loss, cable loss, DTF - **Display:** 10.1 inch multi-touch, battery operation - **Remote:** SCPI / LabVIEW / IVI; LAN, USB, web browser ## About the Siglent SHA851A In summary, the Siglent SHA851A is a handheld multi-function RF analyzer covering 9 kHz to 3.6 GHz, combining spectrum analyzer, vector network analyzer, cable-and-antenna analyzer, signal generator, power meter, EMI pre-compliance, and modulation analysis functions in a battery-powered field-portable enclosure. Per the datasheet, the SHA851A provides -160 dBm/Hz typical displayed average noise level with the preamplifier on, -95 dBc/Hz typical SSB phase noise at 1 GHz / 10 kHz offset, and a 10.1 inch capacitive multi-touch screen, on a single instrument that field service technicians can carry to a cell tower, antenna site, or remote installation. ### What is the Siglent SHA851A used for? The SHA851A is used for field cellular site work, antenna and feedline characterization, transmitter verification, interference hunting, and EMI pre-compliance — applications that historically required a separate spectrum analyzer, VNA, cable-and-antenna analyzer, and signal generator. Per the datasheet, the SHA851A supports cable loss, return loss, VSWR, distance-to-fault (DTF), S-parameters (S11, S21), insertion loss, full two-port transmission measurement, channel power, ACPR, OBW, and CISPR 16-1-1 compliant EMI quasi-peak detection — on the same handheld instrument. ### How does the SHA851A compare to a benchtop spectrum analyzer? A benchtop spectrum analyzer is optimized for a lab bench: AC mains, large display, deep specification depth, and (typically) better phase noise and dynamic range. A handheld instrument like the SHA851A is optimized for the field: battery operation, weather-tolerant enclosure, GPS receiver for site tagging, and integrated cable-and-antenna analyzer functions that lab instruments rarely include in a single chassis. Per the datasheet, the SHA851A delivers benchtop-class spectrum analyzer specifications — -160 dBm/Hz typical DANL, -95 dBc/Hz typical SSB phase noise, and 1 Hz to 10 MHz RBW — combined with field-grade VNA and CAA functions, on a battery-powered handheld designed for tower-crew and field-service work. ### Where does the SHA851A fit in a field RF kit? - Cellular site verification, tower-mounted antenna tests, and feedline characterization up to 3.6 GHz. - Distance-to-fault (DTF) measurement on coaxial feedlines to locate connector damage, water ingress, and feedline kinks. - Cable loss, return loss, VSWR, S11, and S21 measurements via the integrated vector network analyzer mode. - Spectrum monitoring for interference hunting and licensed-band verification, with GPS time and position stamping of captured signals. - EMI pre-compliance investigation at customer sites with CISPR 16-1-1 quasi-peak detection. - Field-service measurements that previously required carrying three or four separate instruments. ## Accessories Supplied Per the manufacturer datasheet, the standard ship kit includes: a Quick Start guide, a battery pack, a region-appropriate AC adapter, and a carrying strap. A carrying case, calibration kit (for VNA / CAA operation), additional batteries, and RF cables / adapters are available as optional accessories from the manufacturer. ## Core Specifications ### Frequency, Reference, and Bandwidth Frequency range 9 kHz to 3.6 GHz Frequency resolution 1 Hz Span range 0 Hz (Zero Span), 100 Hz to maximum frequency Internal reference (10 MHz) Aging < 1 ppm/yr; temperature stability < 1 ppm GPS-disciplined reference Yes, with optional GPS antenna RBW (-3 dB) 1 Hz to 10 MHz, 1-3-10 sequence VBW (-3 dB) 1 Hz to 10 MHz, 1-3-10 sequence EMI filter (-6 dB) 200 Hz, 9 kHz, 120 kHz, 1 MHz (CISPR 16) ### Amplitude, Level, Phase Noise (Spectrum Analyzer Mode) Measurement range (preamp off) DANL to +30 dBm Reference level \-100 dBm to +30 dBm, 1 dB steps Preamplifier Approximately 20 dB nominal Input attenuation 0 to 50 dB, 1 dB steps Maximum continuous power +30 dBm (1 W) Maximum input DC voltage ± 50 VDC Traces / detectors 4 / Pos-peak, Neg-peak, Sample, Normal, Average DANL, preamp on (typ.) \-160 dBm/Hz at 100 MHz SSB phase noise at 1 GHz, 10 kHz offset < -90 dBc/Hz; -95 dBc/Hz typical Absolute amplitude accuracy at 50 MHz ± 0.5 dB Third-order intercept (TOI) +10 dBm typical ### Vector Network Analyzer / Cable-and-Antenna Mode VNA / CAA frequency range 9 kHz to 3.6 GHz Test ports Two (N-type female) Measurement parameters S11 magnitude / phase, S21 magnitude / phase, VSWR, return loss, cable loss, distance-to-fault (DTF), Smith chart, group delay Number of trace points Up to 10001 Sweep types Linear frequency, segment Calibration types OSL (Open / Short / Load), full two-port, normalization Output power \-45 dBm to 0 dBm, 1 dB steps Dynamic range \> 80 dB typical Cable list (for DTF) Pre-populated standard cable types editable by user ### Signal Generator, Power Meter, EMI, Modulation Signal generator (option) Internal source for stimulating DUTs; output level -45 dBm to 0 dBm Power meter (option) Compatible with USB power sensors for accurate absolute power measurement EMI Measurement (option) Peak, Average, Quasi-Peak detectors (CISPR 16-1-1); pre-loaded EN 55022, FCC Part 15 limit standards Modulation Analysis (option) AM, FM, ASK, FSK demodulation and quality measurement Channel-power measurements Channel Power, ACPR, OBW, T-Power, Harmonic, TOI ### Battery, Display, and General Display TFT LCD, 1280 × 800, 10.1 inch multi-touch capacitive Battery operation Lithium-ion battery pack, approximately 4 hours typical operation Internal storage ≥ 8 GB Dimensions (W×H×D, approx.) 330 × 220 × 90 mm Weight (with battery, approx.) approximately 3.4 kg (7.5 lb) AC source (charger) 100-240 V, 50/60 Hz; auto-sensing Operating temperature / humidity \-10 to +50 °C; ≤ 90% RH at 30 °C, non-condensing Enclosure Field-tolerant chassis; not a fully sealed IP-rated unit — protect from sustained weather exposure Safety / EMC / RoHS EN 61010-1; EN 61326-1; 2011/65/EU Remote interfaces LAN, USB Device, USB Host; SCPI / LabVIEW / IVI; HTML5 web browser #### Note on Calibration Kit Requirement Cable, antenna, and VNA measurements on the SHA851A require a calibration kit appropriate to the test-port connector type. The calibration kit is NOT part of the standard ship kit and must be ordered separately. For N-type test ports, an N-type Open / Short / Load (OSL) calibration kit is typically required; SMA adapters and N-to-SMA precision adapters are also commonly needed. Confirm calibration kit requirements at the time of order. #### Note on Optional Features Several measurement modes — including signal generator, power meter, EMI Measurement, and Modulation Analysis — are software options that may be field-upgraded or factory-installed. Confirm at the time of order which options are required for the target application. This webpage was written by a human with an A.I. "Intern", which may contain errors. 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. ## Details - **Price:** 5589.0 USD - **Vendor:** Siglent - **Type:** Sig Ana - **Tags:** Analyzers, Manufacturers, New, Siglent, Signal ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 5589.00 USD | In stock | ## Images - SHA851A Siglent Signal Analyzer New --- > Source: [ValueTronics](https://valuetronics.com/products/sha851a-siglent-signal-analyzer-new) > Updated: 2026-05-21