--- title: "Model 825-M | 8 kHz to 20 GHz Ultra-Agile Multichannel Signal Source" date: 2025-01-05T10:11:54Z modified: 2026-04-24T20:36:44Z permalink: "https://www.berkeleynucleonics.com/model-825/" type: page status: publish excerpt: "" wpid: 19481 --- [ ![](https://www.berkeleynucleonics.com/wp-content/uploads/rf_signal_generators_configurator_banner_4.png) ](/rf-signal-generators-standard-and-custom-versions-available) [](https://www.berkeleynucleonics.com/wp-content/uploads/825-m_.png) ![825-M-20 Module](https://www.berkeleynucleonics.com/wp-content/uploads/825-m_.png) [](https://www.berkeleynucleonics.com/wp-content/uploads/multichannel_825_front_.png) ![825-M-20-X Rackmount Front Panel](https://www.berkeleynucleonics.com/wp-content/uploads/multichannel_825_front_.png) [](https://www.berkeleynucleonics.com/wp-content/uploads/825_rear_.png) ![825-M-20-X Rackmount Rear Panel](https://www.berkeleynucleonics.com/wp-content/uploads/825_rear_.png) - [ Quote ](/get-quote/?interested_product=Model%20825-M%20|%208%20kHz%20to%2020%20GHz) - [ Contact ](/contact-us/) - [ Datasheet ](#bnc-tab-technical-resources) - [ Price List ](/access-pricelist/) - [ LabVIEW ](/bnc-labview-driver-list/) #### Model 825-M | 8 kHz to 20 GHz Ultra-Agile Multichannel Signal Source The 825-M is an agile ultra-low phase noise RF signal source from 8 kHz to 20 GHz RF Synthesizer. It is available in single-channel or multichannel configurations. A single channel 825-M is packaged in a compact enclosure, or can be ordered with a touch-screen display, or a 1U 19″ rackmountable version. The multi-channel version (2, 3, or 4 channels) is packaged in a 19” 1U rackmount enclosure. On multi-channel units, all channels are locked to a single reference source to achieve high phase coherence between each channel. The state-of-the-art Fast Control Port (FCP) provides very fast frequency and amplitude switching achieving less than 10us per step. Model 825-M’s excellent harmonic and spurious performance in combination with fast switching makes the instruments suitable where high performance is required in labs or production facilities. [ ![](data:image/svg+xml;charset=utf-8,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' viewBox%3D'0 0 1105 100'%2F%3E) ](/multi-output-rf-microwave-signal-generator) Overview Configurator Specifications Options Technical Resources Downloadable Resources Media Price Lists ##### Features - Low Phase Noise - Fast switching down to 5 µs - Chirps, Pulse Modulation - Internal OCXO, External variable reference ##### Applications - Automated Test Environment - LO for frequency converters - Telecom / SatCom - R&D Quantum Computers #### Model 825 SIGNAL SOURCE CONFIGURATOR input[type='checkbox'], input[type='radio'] { display: inline !important; appearance: checkbox !important; width: auto !important; } .tables-no-border-and-back, .tables-no-border-and-back td, .tables-no-border-and-back tr { border:0 !important; background-color: transparent !important; } | **Number of Channels:** | 1 Channel 2 Channels in 1U Rackmount 3 Channels in 1U Rackmount 4 Channels in 1U Rackmount | ![](https://www.berkeleynucleonics.com/sites/default/files/825-m_.png) | | --- | --- | --- | | **Options:** | \[-**FS**\] Fast Switching \[-**8k**\] Frequency range extension down to 8 kHz \[-**RM**\] Rackmount Chassis \[-**GPIB**\] GPIB Communication Port | | | Model 825M-20 Flange Mount Chassis, 1 MHz – 20 GHz Signal Source | | | | INQUIRE | | | **Number of Channels** 1, 2, 3, or 4 **Frequency** **Range:** 8 kHz to 20 GHz **Resolution:** 0.01 Hz **Accuracy:** 100ppb **Output Power** 0 to +18 dBm **Switching Speed** 200 µs (5 µs with Option FS) **Phase Noise At 1 GHz CW** 1 kHz offset: **-120 dBc/Hz** 20 kHz offset: **-130 dBc/Hz** 10 MHz offset: **-155 dBc/Hz** **Remote Control** (SCPI v1999) Ethernet, USB, and GPIB (optional) **Modulation** Pulse **Sweeps** Frequency, List **Dimensions (W x L x H)** **Weight** 16.85″ x 18.27″ x 1.73″ \[428 x 464 x 44mm\] 22lbs \[10 kg\] **Shipping Dimensions** 23x23x9 **Shipping Weight** 17 lbs **825-M-20** Single Channel 20 GHz Synthesizer, Compact Chassis **825-M-20-x** 1, 2, 3 or 4 Channel 20 GHz Synthesizer, 19″ 1U Rackmount Chassis (_**x**_ denotes the number of channels) **-TOUCH** With Touch Screen (Desktop Enclosure only) **-8k** Frequency range extension down to 8 kHz **-FS** Enhanced Switching Speed (includes Fast Protocol Port) **-GPIB** GPIB Interface Port (not Available with the Compact Chassis) **-BUMP** Protective Rubber Bumper (ONLY Available with the Touch Screen Display) [ Part Numbering – RF Synthesizer](https://www.berkeleynucleonics.com/download/21511/?tmstv=1777063004) [ App Note – Mixer Measurements](https://www.berkeleynucleonics.com/download/21246/?tmstv=1777063004) [ App Note – How to Program Sweeps in Signal Generators](https://www.berkeleynucleonics.com/download/21249/?tmstv=1777063004) [ App Note – Fast Control Port](https://www.berkeleynucleonics.com/download/26107/?tmstv=1777063004) [ Press Room – How To Choose A Multichannel Microwave Signal Generator](https://www.berkeleynucleonics.com/download/21384/?tmstv=1777063004) [ BNC Model 825-M Frequency Synthesizer Datasheet v132](https://www.berkeleynucleonics.com/download/26117/?tmstv=1777063004) Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our [downloads page](/downloads). - [Product Datasheets](/downloads#rf-datasheets) - [Product Firmware](/downloads#rf-firmware) - [Product Software and Drivers](/downloads#rf-softwaredrivers) - [Product Manuals](/downloads#ddg-manuals) ## Playlist ![Ultimate Guide! The Perfect RF & Microwave Signal Generator](https://img.youtube.com/vi/XIq4aKUcbDQ/maxresdefault.jpg) #### Ultimate Guide! The Perfect RF & Microwave Signal Generator 47:26 [ Berkeley Nucleonics Price List 2026](https://www.berkeleynucleonics.com/download/19881/?tmstv=1777063004) ##### Features - Low Phase Noise - Fast switching down to 5 µs - Chirps, Pulse Modulation - Internal OCXO, External variable reference ##### Applications - Automated Test Environment - LO for frequency converters - Telecom / SatCom - R&D Quantum Computers #### Model 825 SIGNAL SOURCE CONFIGURATOR input[type='checkbox'], input[type='radio'] { display: inline !important; appearance: checkbox !important; width: auto !important; } .tables-no-border-and-back, .tables-no-border-and-back td, .tables-no-border-and-back tr { border:0 !important; background-color: transparent !important; } | **Number of Channels:** | 1 Channel 2 Channels in 1U Rackmount 3 Channels in 1U Rackmount 4 Channels in 1U Rackmount | ![](https://www.berkeleynucleonics.com/sites/default/files/825-m_.png) | | --- | --- | --- | | **Options:** | \[-**FS**\] Fast Switching \[-**8k**\] Frequency range extension down to 8 kHz \[-**RM**\] Rackmount Chassis \[-**GPIB**\] GPIB Communication Port | | | Model 825M-20 Flange Mount Chassis, 1 MHz – 20 GHz Signal Source | | | | INQUIRE | | | **Number of Channels** 1, 2, 3, or 4 **Frequency** **Range:** 8 kHz to 20 GHz **Resolution:** 0.01 Hz **Accuracy:** 100ppb **Output Power** 0 to +18 dBm **Switching Speed** 200 µs (5 µs with Option FS) **Phase Noise At 1 GHz CW** 1 kHz offset: **-120 dBc/Hz** 20 kHz offset: **-130 dBc/Hz** 10 MHz offset: **-155 dBc/Hz** **Remote Control** (SCPI v1999) Ethernet, USB, and GPIB (optional) **Modulation** Pulse **Sweeps** Frequency, List **Dimensions (W x L x H)** **Weight** 16.85″ x 18.27″ x 1.73″ \[428 x 464 x 44mm\] 22lbs \[10 kg\] **Shipping Dimensions** 23x23x9 **Shipping Weight** 17 lbs **825-M-20** Single Channel 20 GHz Synthesizer, Compact Chassis **825-M-20-x** 1, 2, 3 or 4 Channel 20 GHz Synthesizer, 19″ 1U Rackmount Chassis (_**x**_ denotes the number of channels) **-TOUCH** With Touch Screen (Desktop Enclosure only) **-8k** Frequency range extension down to 8 kHz **-FS** Enhanced Switching Speed (includes Fast Protocol Port) **-GPIB** GPIB Interface Port (not Available with the Compact Chassis) **-BUMP** Protective Rubber Bumper (ONLY Available with the Touch Screen Display) [ Part Numbering - RF Synthesizer](https://www.berkeleynucleonics.com/download/21511/?tmstv=1778700938) [ App Note - Mixer Measurements](https://www.berkeleynucleonics.com/download/21246/?tmstv=1778700938) [ App Note - How to Program Sweeps in Signal Generators](https://www.berkeleynucleonics.com/download/21249/?tmstv=1778700938) [ App Note - Fast Control Port](https://www.berkeleynucleonics.com/download/26107/?tmstv=1778700938) [ Press Room - How To Choose A Multichannel Microwave Signal Generator](https://www.berkeleynucleonics.com/download/21384/?tmstv=1778700938) [ BNC Model 825-M Frequency Synthesizer Datasheet v132](https://www.berkeleynucleonics.com/download/26117/?tmstv=1778700938 "Version m_datasheet_v.132") Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our [downloads page](/downloads). - [Product Datasheets](/downloads#rf-datasheets) - [Product Firmware](/downloads#rf-firmware) - [Product Software and Drivers](/downloads#rf-softwaredrivers) - [Product Manuals](/downloads#ddg-manuals) ## Playlist ![Ultimate Guide! The Perfect RF & Microwave Signal Generator](https://img.youtube.com/vi/XIq4aKUcbDQ/maxresdefault.jpg) #### Ultimate Guide! The Perfect RF & Microwave Signal Generator 47:26 [ Berkeley Nucleonics Price List 2026](https://www.berkeleynucleonics.com/download/19881/?tmstv=1778700938) [ ![](data:image/svg+xml;charset=utf-8,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' viewBox%3D'0 0 1105 130'%2F%3E) ](/products/microwave-rf-signal-generators)