# Advantest R3131 9 kHz to 3 GHz Personal Spectrum Analyzer (Pre-Owned) # Advantest R3131 9 kHz to 3 GHz Personal Spectrum Analyzer (Pre-Owned) ## Key Features At A Glance - 9 kHz to 3 GHz frequency range for mobile communications, EMC, CATV, and production-line work - Built-in OBW, ACP, channel power, and total power functions for digital radio measurement - Standard GPIB (IEEE-488), RS-232C, and Centronics printer interfaces plus 3.5-inch MS-DOS floppy drive - EMC function with 9 kHz and 120 kHz RBW and QP detector conforming to CISPR Pub.16-1 - Auto TUNE locates the maximum-level signal in the 3 GHz band and sets center frequency automatically - Total level accuracy of ±1.5 dB after auto calibration via the built-in Auto CAL function - Compact, space-saving design weighing 12 kg or less - Optional integrated tracking generator (OPT.74) covering 100 kHz to 3.0 GHz The Advantest R3131 is an easy-to-use personal spectrum analyzer that combines the high accuracy required for digital radio measurement with an emphasis on operability and usability. Covering 9 kHz to 3 GHz, it presents results on a 5.7-inch black-and-white STN display with enlarged characters for clear reading, and arranges its FREQ, SPAN, and LEVEL functions alongside dedicated data-entry, marker, and control keys to streamline setup at the bench or on a production line. The R3131 is applied across diverse fields, including mobile communications, EMC, parts evaluation, installation and maintenance, development and production lines, and CATV. Its OBW and adjacent channel leakage power (ACP) functions support transmission characteristics testing for radio equipment, while the channel power and total power functions address frequency-diffuse and multi-carrier signals. A spectrum analyzer of this type captures and characterizes signals in the frequency domain, letting an engineer view signal levels, frequency content, and power within a defined band. ValueTronics stocks and holds its own inventory in a 20,000 square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois, so the equipment we sell is on hand and managed by our own team. Every used unit is inspected and functionally verified in-house against the original manufacturer's specifications before it ships, while new units ship factory-sealed exactly as received from the manufacturer. ## Brand Heritage Advantest Corporation traces its origins to Takeda Riken, a Japanese instrument maker, and adopted the Advantest name in 1985. ## Product Core & Specifications Specification Value Frequency Range 9 kHz to 3 GHz Frequency reading accuracy ± (Frequency reading x Frequency reference accuracy + Span x Span accuracy + 0.15 x Resolution bandwidth + 1 kHz) Marker counter accuracy ± (Marker frequency x Frequency reference accuracy + 1 LSD) (S/N ≥25 dB, SPAN ≤200 MHz) Marker counter resolution 1 Hz to 1 kHz Frequency reference source accuracy ±2 ppm/year; ±5 ppm at operating temperature range Frequency span zero, 50 kHz to 3 GHz Frequency span accuracy ≤±3% Frequency stability, Residual FM ≤100 Hzp-p/100 ms (zero span) Sideband noise ≤100 dBc/Hz (20 kHz offset) Resolution 3 dB bandwidth 1 kHz to 1 MHz, 1-3 step Bandwidth accuracy ≤±20% Selectivity ≤15:1 (60 dB:3 dB) 6 dB bandwidth 9 kHz, 120 kHz Video bandwidth 10 Hz to 1 MHz, 1-10 step Amplitude Amplitude measurement range +20 dBm to Average noise level Maximum input level +20 dBm, 50 VDC Display range (LOG) 10 dB/div 8 div, 1,2,5 dB/div 10 div Display range (LIN) 10%/div of reference level Reference level range (LOG) \-64 dBm to +40 dBm Reference level range (LIN) +141.1 µV to +22.36 V Input attenuator range 0 to 50 dB, 10 dB step Sweep Sweep time 50 ms to 500 s Sweep time accuracy ≤±3% Trigger mode FREE RUN, VIDEO, EXT, LINE Sweep mode REPEAT, SINGLE Dynamic Range Average noise level \-113 dBm +2 f (GHz) dB (at RBW 1 kHz, VBW 10 Hz, INPUT ATT 0 dB, frequency ≥1 MHz) 1 dB gain compression \> -5 dBm (mixer input level, f ≥20 MHz) Secondary harmonic distortion ≤-70 dB (input frequency ≥10 MHz, mixer input level -30 dBm) 3rd Order Intermodulation ≤-70 dB (input frequency ≥10 MHz, mixer input level -30 dBm, ∆f > 50 kHz) Other input spurious ≤-60 dB (offset ≥20 MHz, mixer input level -30 dBm) Residual response ≤-100 dBm (Frequency ≥1 MHz, INPUT ATT = 0 dB, input 50 Ω terminated) Amplitude Accuracy Calibration signal 30 MHz, -20 dBm ±0.3 dB Frequency response ≤±0.5 dB (100 kHz to 3 GHz, ATT = 10 dB); ≤±1 dB (100 kHz to 2 GHz); ≤±2 dB (9 kHz to 3 GHz) (after calibration at 30 MHz reference) Scale display accuracy (LOG) ≤±0.5 dB (0 to -20 dB); ≤±1.5 dB/70 dB; ≤±1.0 dB/10 dB; ≤±0.2 dB/1 dB (after auto calibration) Scale display accuracy (LIN) ±5% of reference level Input attenuator switching accuracy ≤±0.3 dB (10 dB reference, 30 MHz) Resolution bandwidth switching accuracy ≤±0.5 dB (after auto calibration) IF gain error ≤±0.5 dB (after auto calibration) Total level accuracy ±1.5 dB (after auto calibration, REF = -50 to 0 dBm, ATT = 10 dB, 2 dB/div, RBW = 300 kHz, f > 100 kHz) Input/Output RF input connector/impedance N type jack/50 Ω (nominal) VSWR ≤1.5 (100 kHz to 2 GHz, INPUT ATT ≥10 dB); ≤2.0 (9 kHz to 3 GHz, INPUT ATT ≥10 dB) 10 MHz REF. input BNC jack, 50 Ω; Input range -10 dBm to +10 dBm Ext. trigger input BNC jack, 10 kΩ (nominal), DC coupling Phone output Mini monophonic jack, 8 Ω GPIB interface IEEE-488 bus connector Serial interface D-SUB 9-pin Printer interface D-SUB 25-pin, ESC/P, PCL Floppy disk drive 3.5-inch, 1.4 Mbyte, MS-DOS format General Operating conditions 0°C to +50°C, 85%RH max. (without condensation) Storage conditions \-20°C to +60°C Power supply 100/200 VAC, auto switching; 100 VAC: 100 V to 120 V, 50 Hz/60 Hz; 220 VAC: 220 V to 240 V, 50 Hz/60 Hz Power consumption 200 VA max. (100 VAC) Weight 12 kg or less Dimensions Approx. 424 mm (W) x 177 mm (H) x 300 mm (D) > **Important:** Maximum input level: +20 dBm, 50 VDC. > Recommended pairing: use the ZRB2 SWR bridge together with the OPT.74 tracking generator to measure the reflection characteristics of antennas and filters, per the datasheet's typical setup. ## About this Pre-Owned unit This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects. - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application. **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:** 0.0 USD - 675.0 USD - **Vendor:** Advantest - **Type:** Spec An - **Tags:** Advantest, Analyzers, Manufacturers, product_manual_group_1, Product_used, Spectrum ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 0.00 USD | In stock | | NIST Traceable | 525.00 USD | In stock | | NIST Traceable with Full Data | 600.00 USD | In stock | | ISO IEC 17025 Accredited | 675.00 USD | In stock | ## Images - Advantest R3131 9 kHz to 3 GHz Personal Spectrum Analyzer (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/r3131-advantest-spectrum-analyzer-used) > Updated: 2026-07-06