# Anritsu MG3641A Synthesized Signal Generator, 125 kHz to 1040 MHz (Pre-Owned) # Anritsu MG3641A Synthesized Signal Generator, 125 kHz to 1040 MHz (Pre-Owned) ## Key Features At A Glance - Frequency coverage from 125 kHz to 1040 MHz (MG3641A) or 2080 MHz (MG3642A) - 0.01 Hz frequency setting resolution across the full range - Low SSB phase noise to -130 dBc/Hz at 1 GHz with 20 kHz offset - Non-harmonic spurious below -100 dBc for reliable interference measurements - +17 dBm standard output with overdrive capability up to +23 dBm - Simultaneous AM and dual-route FM modulation with independent settings - GPIB Only-Mode allows two units to operate linked without external controller - Optional pulse modulator, AF synthesizer, and FSK encoder for versatile signal generation The Anritsu MG3641A and MG3642A are synthesized signal generators covering 125 kHz to 1040 MHz and 125 kHz to 2080 MHz respectively. Built around a low-noise YIG oscillator and Anritsu synthesizer technology, these instruments deliver 0.01 Hz frequency resolution across the full range, with non-harmonic spurious better than -100 dBc and SSB phase noise better than -130 dBc/Hz at 1 GHz with 20 kHz offset. These signal generators are used as sources for interference testing of radio receivers and as local and reference signal sources. The instrument set supports mixer characteristic measurements using Frequency Only Mode with frequency offset, and amplifier IM3 measurements using Level Only Mode where two linked units feed a two-signal characteristics measurement pad driving the amplifier under test into a spectrum analyzer. ## Brand Heritage Anritsu Corporation is a Japanese precision measurement company with roots tracing to 1895. In 1990 Anritsu acquired Wiltron Company, a US-based RF and microwave instrument maker, consolidating signal generator and network analyzer product lines under the Anritsu name. The MG synthesized signal generator series has remained an Anritsu-branded product family across this corporate evolution. ## Compare Other Models in This Series The MG3641A and MG3642A share a common platform — identical synthesizer architecture, identical YIG oscillator design, identical modulation capability, and identical control and interface features. The two models differ in a single dimension: the upper frequency limit of the carrier. Both cover the same 125 kHz lower boundary, the same 0.01 Hz resolution, and the same +17 dBm standard output capability. Anritsu offers this two-model arrangement so a buyer can select frequency coverage to match the application without paying for range that will not be used. Customers focused on cellular and lower-UHF bands can specify the MG3641A; customers needing coverage into the lower L-band region can specify the MG3642A. The option set — Option 01 reference oscillator, Option 11 pulse modulator, Option 21 AF synthesizer, Option 22 FSK encoder — applies identically to both models. Each pre-owned model below has its own product page with condition-matched pricing and stock status. Where the MG3641A and MG3642A share a specification (resolution, signal purity at common frequencies, modulation capability, GPIB control set), the entries on each page reflect that. Where they differ — the upper frequency limit and the phase noise specification above 1040 MHz — the per-model page documents the specifics for that unit. The MG3641A covers 125 kHz to 1040 MHz. The MG3642A covers 125 kHz to 2080 MHz. The comparison table that follows details the frequency boundary and the additional phase noise specification that applies to the MG3642A above 1040 MHz. For applications confined to sub-GHz and the lower 1 GHz region, the MG3641A is sufficient. FM deviation ranges also scale with carrier frequency on both models, and the MG3642A adds an upper deviation range of 0 to 2048 kHz that is available only above 1040 MHz. Pulse modulation, AF synthesizer, and FSK encoder options are interchangeable between the two models. The user interface, sweep modes, memory capacity, and trigger sequence programming are identical. Model Frequency Range Output Level Range Resolution **MG3641A** 125 kHz to 1040 MHz \-143 to +17 dBm (settable: -143 to +23 dBm) 0.01 Hz MG3642A 125 kHz to 2080 MHz \-143 to +17 dBm (settable: -143 to +23 dBm) 0.01 Hz Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - J0017F Power cord, 2.5 m (1 pc) - B0325 GPIB connector shielded cap (1 pc) - F0013 Fuse, 5 A (for 100 Vac mains) (2 pcs) - F0012 Fuse, 3.15 A (for 200 Vac mains) (2 pcs) - W1137AE MG3641A/3642A operation manual (1 copy) - W1137BE MG3641A/3642A service manual (1 copy) ## Product Core & Specifications Parameter Specification Carrier Frequency Range 125 kHz to 1040 MHz (MG3641A); 125 kHz to 2080 MHz (MG3642A) Resolution 0.01 Hz Accuracy Reference oscillator accuracy; reference oscillator accuracy ±(0.3% of FM setting deviation + 5 Hz) at frequency modulation Internal Reference Oscillator Frequency 10 MHz Aging Rate ±5 x 10⁻⁹/day Start-up Characteristics 1 x 10⁻⁷/10 min (for 24 h after power on) Temperature Stability ±3 x 10⁻⁸ (0° to 50°C) External Reference Input 5/10 MHz, ±10 ppm, ≥0.7 Vp-p/50 Ω (AC coupling), BNC connector (rear panel) Buffer Output 10 MHz, TTL level (DC coupling), BNC connector (rear panel) Switching Time ≤40 ms (external control, response time from last command until becomes within ±0.1 ppm of set frequency) Output Range \-143 to +17 dBm (settable range: -143 to +23 dBm) Units dBm, dBµ, V, mV, µV (dBµ, V, mV and µV switchable between termination voltage display and open voltage display) Resolution 0.01 dB Frequency Characteristics (at 0 dBm) ±0.5 dB, ±1.0 dB (pulse modulation: on) Accuracy ±1 dB (-127 to +17 dBm, upper limit at pulse modulation: +12 dBm), ±3 dB (≤-127 dBm) Impedance 50 Ω (N connector), VSWR: ≤1.5 (≤-3 dB), ≤2.5 (>-3 dB) Switching Time ≤50 ms (normal mode), ≤100 ms (level safety mode), ≤10 ms (continuous mode) Continuous Mode Variable within set value ±10 dB with no interruption of output Safety Mode Prevent spike signal generation when operating mechanical-type attenuator Interference Radiation ≤0.1 µV (at output frequency), ≤1 µV (over entire frequency range, multi-menu display: OFF) Signal Purity (CW mode, ≤+7 dBm) Harmonics ≤-30 dBc (2nd, 3rd) Non-harmonic ≤-100 dBc (≥15 kHz offset) Those Related Power ≤-40 dBc (<15 kHz offset) SSB Phase Noise (CW Mode, 20 kHz offset) ≤-140 dBc/Hz (10 to <256 MHz), ≤-136 dBc/Hz (256 to <512 MHz), ≤-130 dBc/Hz (512 to 1040 MHz), ≤-124 dBc/Hz (>1040 MHz, MG3642A only) Residual AM (CW mode) ≤-80 dBc (≥500 kHz, CW mode, +7 dBm, 50 Hz to 15 kHz demodulation band) Residual FM (CW mode, 300 Hz to 3 kHz) <4 Hzrms (10 to <512 MHz), <8 Hzrms (512 to 1040 MHz), <16 Hzrms (>1040 MHz, MG3642A only) Residual FM (CW mode, 50 Hz to 15 kHz) <5 Hzrms (10 to <512 MHz), <10 Hzrms (512 to 1040 MHz), <20 Hzrms (>1040 MHz, MG3642A only) Amplitude Modulation Range 0% to 100% Resolution 0.1% Accuracy ±(5% of set value + 2%) at ≥0.4 MHz, ≤+7 dBm, ≤90% AM, source: Int 1 (1 kHz), 300 Hz to 3 kHz demodulation band Modulation Frequency Response (output: ≤+7 dBm) See modulation frequency response table in datasheet Distortion ≤-40 dB (30% AM), ≤-30 dB (90% AM) at ≥0.4 MHz, ≤+7 dBm, source: Int 1 (1 kHz) Incidental FM <200 Hz peak at ≥0.4 MHz, AM: 30%, ≤+7 dBm, source: Int 1 (1 kHz), 300 Hz to 3 kHz demodulation band Modulation Signal Source One of internal (Int 1, Int 2, Int 3) and external (Ext 1, Ext 2) Modulation Signal Polarity Positive/negative switchable Frequency Modulation Range 0 to 125 Hz (125 to <250 kHz) up to 0 to 2048 kHz (>1040 MHz, MG3642A only) Resolution 1 Hz (0 to 4 kHz deviation) up to 1 kHz (1025 to 2048 kHz deviation, MG3642A only) Accuracy ±(5% of set value + 10 Hz) at 0.4 to <512 MHz, ±(5% of set value + 20 Hz) at 512 to 1040 MHz, ±(5% of set value + 40 Hz) at >1040 MHz (MG3642A only); Source: Int 1 (1 kHz), 300 Hz to 3 kHz demodulation band Modulation Frequency Response DC or 20 Hz to 20 kHz (0.4 to <10 MHz), DC or 20 Hz to 100 kHz (≥10 MHz) at ±1 dB bandwidth Distortion ≤-40 dB at ≥16 MHz, 3.5 kHz deviation, source: Int 1 (1 kHz); ≤-45 dB at ≥64 MHz, 22.5 kHz deviation, source: Int 1 (1 kHz) Incidental FM <1% peak at ≥64 MHz, ≤+7 dBm, 100 kHz deviation, source: Int 1 (1 kHz), 300 Hz to 3 kHz demodulation band External Modulation Group Delay <30 µs at ≥10 MHz, source: external DC coupling mode, modulation rate: ≤100 kHz Modulation Signal Source (FM1, FM2) One of internal (Int 1, Int 2, Int 3), and external (Ext 1, Ext 2) Modulation Signal Polarity FM1, FM2 positive/negative switchable Pulse Modulation Specifications According to option specifications (Option 11) Modulation Signal Source Internal Modulation (Int 1) Frequency 400 Hz, 1 kHz Internal Modulation (Int 1) Accuracy Same as reference oscillator accuracy Internal Modulation (Int 2, Int 3) According to option specifications External Modulation (Ext 1, Ext 2) Proper Input Level 2 Vp-p approx. External Modulation Input Impedance 600 Ω, BNC connector External Modulation Coupling DC/AC switchable AF Output Output Signal Source One of internal (Int 1, Int 2, Int 3) and external (Ext 1, Ext 2) Output Level 0 to 4 Vp-p Output Level Resolution 1 mVp-p Output Level Accuracy ±(5% of setting level + 2 mVp-p), Source: Int 1 (1 kHz) Impedance 600 Ω, BNC connector Simultaneous Modulation Capability Excluding amplitude modulation and pulse modulation combination, simultaneous modulation, modulation rate, deviation independently settable Sweep Function Sweep Parameters Frequency, output level, memory Frequency Sweep (start/stop) Linear (specified step size and number of points), Log (multiplying factor: 1%) Frequency Sweep (center/span) Linear (specified step size and number of points) Level Sweep (start/stop, center/span) dB (specified step size and number of points); Sweep: continuous mode (max. 20 dB width) Memory Sweep Start/stop Sweep Mode Auto, single, manual Sweep Time Setting Range 1 ms to 600 s/point (actual sweep time depends on sweep parameter) **Important:** Maximum reverse input power: 50 W (≤1040 MHz), 25 W (>1040 MHz, MG3642A only), ±50 Vdc.**Important:** When ordering, specify a nominal voltage of either 100 V or 240 V; the maximum operating voltage is 250 V.**Important:** Option 01 (Reference Oscillator) improves aging rate from the standard ±5 x 10⁻⁹/day to 5 x 10⁻¹⁰/day; specify at time of order if higher frequency stability is required.**Important:** SSB phase noise specification of ≤-124 dBc/Hz at 20 kHz offset applies to frequencies above 1040 MHz on the MG3642A only.**Important:** Residual FM and other above-1040 MHz performance specifications apply to MG3642A only.Recommended pairing: link two MG3641A/MG3642A units via GPIB Only-Mode with a two-signal characteristics measurement pad and a spectrum analyzer to evaluate amplifier IM3 and cross-modulation per the datasheet's example configuration. ## About this used unit - 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). **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 - 560.0 USD - **Vendor:** Anritsu - **Type:** Rf Gen - **Tags:** Anritsu, Manufacturers, product_manual_group_1, Product_used, Signal Generators, Sweep ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 0.00 USD | In stock | | NIST Traceable | 455.00 USD | In stock | | NIST Traceable with Full Data | 490.00 USD | In stock | | ISO IEC 17025 Accredited | 560.00 USD | In stock | ## Images - Anritsu MG3641A Synthesized Signal Generator, 125 kHz to 1040 MHz (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/mg3641a-anritsu-sweep-generator-used) > Updated: 2026-05-30