Model 875 | 10 MHz to 40 GHz Multi-Channel Vector Signal Generators
Model 875 is a vector-modulated signal generator covering 10 MHz to 40 GHz continuously. It supports ultra-fast switching down to 200 ns, enabling rapid CW sweeps, chirping, intra-pulse modulation, pulse shaping, and low phase noise operation.
- Fast Switching & Modulation: 200 ns switching speed for agile frequency changes and complex waveform generation.
- Internal I/Q Modulator: High-performance modulator handles custom waveforms and dedicated schemes, including avionics modulations.
- Deep Memory & Wideband Support: Large internal memory and wideband design simplify programming of intricate modulation patterns.
- Pulse Descriptor Word (PDW) Playback: Upload PDWs (pulse width, amplitude, frequency, angle, time of arrival) via Ethernet or USB; real-time translation creates modulated pulse streams for radar simulation and high-density EW scenarios.
- Real-Time PDW Input: Feed individual PDWs sequentially through the Fast Control Port (FCP) for immediate or delayed playback—useful for on-the-fly radar verification and parameter adjustments.
- Multi-Channel Synchronization: Supports phase-coherent, accurately timed playback across multiple Model 875 units for multi-channel radar or EW testing.
This multi-channel vector signal generator is suited for radar receiver simulation, electronic warfare system validation, avionics testing, pulse-dense signal emulation, and R&D environments requiring flexible, high-speed modulation control.
Model 875 IQ Modulation Sequencer Playback – Pulse Chirp, BPSK, QAM, and Multitone
Berkeley Nucleonics’ multi-channel Model 875 VSGs have a combination of features such as fast switching, phase coherence, phase-coherent switching, and timing-accurate operation. With this new family of VSGs, users are able to easily generate versatile and realistic pulse signals in radar, EW and 5G/6G Communications application scenarios. Multiple lists of PDWs can be replayed from the internal memory or live-streamed through the fast control ports. The Model 875-4-40 offers four channels of accurately timed and phase calibrated signals in an “industry best” compact 2U package!
Applications
- Arbitrary I/Q waveform
- Radar signal simulation (PDW / EW)
- Receiver testing
- Avionic modulation emulation
- Pulse Descriptor Word agility
- Mobile Radio Chip (multi-standard)
- IEEE 802.11 a/b/g Test and R&D
- MIMO (multiple input, multiple output)
Features
- Excellent Phase Noise
- Fast Control Port
- Ultra-fast switching
- Ultra-high I/Q data rates, deep internal memory
- Wideband linear chirp
- ASK, FSK, MSK, PSK
- GSM/EDGE, 3GPP FDD including HSDPA, GPS, CDMA2000
MODEL 875 VECTOR SIGNAL GENERATOR CONFIGURATOR
| Frequency Range: | 10 MHz to 4 GHz 10 MHz to 6 GHz 10 MHz to 12 GHz 10 MHz to 20 GHz 10 MHz to 40 GHz |
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| Number of Channels: | 1 Channel [Desktop Chassis. Check RM option below for 2U Rackmount] 2 Channels in 2U Rackmount 3 Channels in 2U Rackmount 4 Channels in 2U Rackmount |
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| Options: | [-LN] Enhanced Close-In Phase Noise [-LN+] Enhanced Close-In Phase Noise and Long Term Stability [-100k] Frequency Extension down to 100 kHz [-AWGN] Additive White Gaussian Noise [-UFS] Ultra Fast Switching [-FCP] Fast Control Port [-PHS] Phase-Coherent Switching (per Output) [-MOD] Analog Modulation (AM, FM, Phase Modulation) [-IVM] Internal Digital Modulation Schemes [-PE] Mechanical Step Attenuator down to -90dBm [-PE2] Mechanical Step Attenuator down to -120dBm [-PE4] Electrical Step Attenuator [only for 875-4, -6, -12] [-AVIO] Avionics Modulation (DME, VOR, ILS) [-PDW] Pulse Descriptor Word [-SYNC] Multi-device Synchronization [-VREF] Variable External Reference Input from 1 MHz to 250 MHz [-AIQ] External Analog I/Q Inputs [-SD] MicroSD card slot for external IQ data Storage [-RM] 19" 2U Rackmount Chassis [-GPIB] GPIB Interface |
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| Accessories: | [-EB] External Battery Bank [P/N 7146] 19" 3U Single/Dual Rackmount Kit for Benchtop Chassis [P/N 7091] Spare Power Supply [P/N 7143] |
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Model 875-4
10MHz - 4 GHz Vector Signal Generator
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Frequency
875-4: 10 MHz to 4 GHz
875-6: 10 MHz to 6 GHz
875-12: 10 MHz to 12 GHz
875-20: 10 MHz to 20 GHz
875-40: 10 MHz to 40 GHz
Resolution
0.001 Hz
Output Power
-50 to +20dBm (-90dBm optional)
Switching Speed
<500us (<2 us with option UFS)
Phase Noise ( 1 GHz )
at 10 Hz: -87 dBc/Hz [-100 dBc/Hz with option LN]
at 1 kHz: -130 dBc/Hz
at 20 kHz: -145 dBc/Hz
at 100 kHz: -150 dBc/Hz
Remote Control
Ethernet, USB, and optional GPIB (SCPI v1999)
Modulation
I/Q, Pulse, Analog Modulation
Sweeps
Complex Lists
References Input
10 MHz or Variable 5 MHz to 250 MHz (option VREF)
References Output
10 MHz / 100 MHz
Benchtop Dimensions (W x L x H)
Weight
6.77″ x 11.412″ x 4.12″ [172 x290 x 105mm] (incl. connectors)
6.0lbs. (8.0lbs. shipping)
Rackmount Dimensions (W x L x H)
Weight
2U 17.5″ x 24″ x 3.5″ [444 x 610 x 88mm] (incl. connectors)
40.0lbs. (42.0lbs. shipping)
App Note – Model 875 Multi-Channel VSG with Phase Calibration
App Note – Automatic Leveling Correction
App Note – VSG IQ File Format
App Note – VSG Memory Segmentation
App Note – VSG Additive White Gaussian Noise
App Note – Control Descriptor Word Model 875
App Note – Fast Control Port Model 875
App Note – Fast Control Port with MDR 26 Pin Connector
App Note – Descriptor Word Model 875
App Note – Level Self Adjustment
Press Room – Telecommunication Applications And Mobile Radio Chip Testing | Vector Signal
Press Room – Radar Signal Simulation (PDW / EW) | Model 875 Vector Signal Generator
Press Room – Exploring The Benefits Of A Multi Channel Vector Signal Generator | Model 875
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Press Room – Multichannel Signal Generators And Local Oscillators
Press Room – Silicon Valley, Cradle of Computer Chips
Press Room – LN vs. LN+ Options
Press Room – How To Choose A Multichannel Microwave Signal Generator
Press Room – The Power Of Vector Signal Generators In Modern Communication
Press Room – Model 875: Multi-Channel Radar Signal Generation With Precise Phase And Timing Accuracy
Press Room – Exploring The Versatile Applications & Functions Of Vector Signal Generators
Press Room – The Necessity of Radar in Fighting Megafires
BNC Model 875 Vector Signal Generator Datasheet v1.32
Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our downloads page.
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To check price and delivery, to place a Purchase Order, or to expedite an existing order, please call 415-453-9955, email info@berkeleynucleonics.com or fill out a Get a Quote form. Typical response time is less than 2 hours.
The key difference between LN and LN+ is that LN+ will have better long-term performance—for example, a better Allan variance for a longer time. For short-time performance, they are identical.
Here’s another example…Option LN adds a 100 MHz OCXO on the ref board, applying to all channels. Option LN+ will do the same. The only difference is that the OCXO will have better long-term stability.
You can incorporate either LN or LN+. Options can’t be combined and priced per unit.
