# Advantest R3131A 3 GHz Personal Spectrum Analyzer (Pre-Owned)

# Advantest R3131A 3 GHz Personal Spectrum Analyzer (Pre-Owned)

## Key Features At A Glance

-   Frequency range of 9 kHz to 3 GHz for measurements across mobile communications, CATV, and EMC work
-   Built-in high-accuracy OBW, ACP, and Power measurement functions for digital radio measurement
-   GPIB, RS-232C, and Centronics interfaces standard, plus a 3.5-inch MS-DOS floppy disk drive
-   EMC function with 9 kHz and 120 kHz RBW and QP detector conforming to the CISPR Pub.16-1 standard
-   Auto TUNE and Auto CAL functions for fast setup and guaranteed total level accuracy
-   Maximum input level of +30 dBm, 50 VDC on an N-type 50 Ω RF input
-   Optional tracking generator (OPT.74) for stimulus-response measurement up to 3 GHz
-   Compact 12 kg design with a 5.7-inch display and storage for up to 10 measurement files

The Advantest R3131A is a personal spectrum analyzer that combines the high accuracy needed for digital radio measurement with an emphasis on operability and ease of use. It covers a 9 kHz to 3 GHz frequency range and pairs that span with frequency stabilization, improved span accuracy, and improved level accuracy, along with a 5.7-inch black-and-white STN display for clear readout of results.

The R3131A is intended for use across diverse fields and applications. These include mobile communications, EMC work, parts evaluation, installation and maintenance, development and production lines, and CATV. Its operation-key arrangement, large-character display, and improved system operation speed are oriented toward fast, repeatable measurement on the bench and on the line.

ValueTronics stocks and holds its own inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned instrument is inspected and functionally verified in-house before it ships, while new units ship factory-sealed exactly as received from the manufacturer. Holding the equipment ourselves means we can speak to what we carry and get the right instrument out the door quickly.

## Brand Heritage

Advantest Corporation traces its roots to Takeda Riken, the company under which it operated before adopting 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, 10 kHz to 3 GHz

Frequency span accuracy

≤±3% (50 kHz ≤ span ≤ 3 GHz); ≤±10% (10 kHz ≤ span < 50 kHz, typ. ±3%)

Residual FM

≤100 Hzp-p/100 ms (zero span)

Sideband noise

≤-100 dBc/Hz (20 kHz offset)

Resolution 3 dB bandwidth

300 Hz to 1 MHz (1-3 step)

Bandwidth accuracy

≤±20% (RBW 1 kHz to 1 MHz); ≤±50% (RBW 300 Hz, typ. ±20%)

Selectivity (60 dB:3 dB)

≤15:1 (RBW 1 kHz to 1 MHz); ≤20:1 (RBW 300 Hz, 50 dB:3 dB)

6 dB bandwidth

9 kHz, 120 kHz

Video bandwidth

10 Hz to 1 MHz (1-10 step)

Amplitude

Amplitude measurement range

+30 dBm to Average noise level

Maximum input level

+30 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 specifications

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)

OPT.74 Tracking Generator (Option)

Frequency range

100 kHz to 3.0 GHz

Output level range

0 dBm to -59.9 dBm (0.1 dB step)

Output level accuracy

≤±0.5 dB (30 MHz, -10 dBm, 20°C to 30°C)

Output level flatness (at -10 dBm, referenced to 30 MHz)

≤±1.0 dB (100 kHz to 1.0 GHz); ≤±1.5 dB (100 kHz to 3.0 GHz)

Output level switching error (referenced to -10 dBm)

≤±1.0 dB (100 kHz to 1.0 GHz, output level ≥-30 dBm); ≤±2.0 dB (100 kHz to 2.6 GHz); ≤±3.0 dB (100 kHz to 3.0 GHz)

Output spurious - Harmonic

≤-20 dBc (output level = -10 dBm)

Output spurious - Non-harmonic

≤-30 dBc (output level = -10 dBm)

> **Important:** Maximum input level: +30 dBm, 50 VDC.

> Recommended pairing: use the SWR bridge ZRB2 with the OPT.74 tracking generator to measure the reflection characteristic of antennas and filters.

## 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 R3131A 3 GHz Personal Spectrum Analyzer (Pre-Owned)

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> Source: [ValueTronics](https://valuetronics.com/products/r3131a-advantest-spectrum-analyzer-used)
> Updated: 2026-07-06