Model 855B | 300 kHz up to 42 GHzMulti-Channel RF / Microwave Signal Generator

The Model 855B Series is a Phase-Coherent Multi-Channel output Fast Switching and Low Phase Noise signal generator with a frequency range from 300 kHz to 6.2 GHz, 12.5 GHz, 20 GHz, 33 GHz, or 40 GHz. Each channel is fully independent that enables the user to tune frequency, power, and phase independently. The 855B leading-edge switching speed of 25μs, combined with a broad power range and good spurious and harmonic rejection, the 855B is ideally suited for a variety of applications where good signal quality and a wide, accurate output power range are required. Excellent phase noise is combined with spurious and harmonic rejection. A high-stability OCXO reference provides excellent frequency accuracy and stability. The generator accepts standard external 10MHz or 100MHz clock references with optional variable reference input that accepts clock frequency ranging from 1 MHz to 250 MHz with 1 MHz increment. Model 855B is designed with scalability in mind, it has a dedicated 3 GHz System Reference In and System Reference Out for synchronizing multiple BNC Model 855B units providing infinite synchronized channels.

The Model 855B series comes in a standard 19-inch 1U rackmount chassis with up to 4 channels and offers various control interfaces such as USB, LAN, or GPIB. Each interface allows easy and fast communication using the SCPI 1999 command set. Remote control of the instrument can be quickly attained from any host computer using the free and intuitive GUI (Graphical User Interface). In addition, a customer-supplied application programming interface (API) or programming examples for Matlab, Labview, C++, and other commercially available tools make implementation very straightforward.

The Model 855B offers a handy Phase-Coherent Switching option. While you can set the phase relationship between channels (in a fraction of degrees) on the standard unit, the Phase-Coherent Switching option allows users to maintain the phase relationship between channels even while switching frequency.

Model 855B DEVICE CONFIGURATOR

Number of Channels: 2 Channels in 1U Rackmount
3 Channels in 1U Rackmount
4 Channels in 1U Rackmount
Frequency Range: 6 GHz (settable to 6.5GHz) 
12 GHz 
20 GHz 
33 GHz 
40 GHz  (settable to 42GHz) 
Options: [-LN] Enhanced Close-In Phase Noise
[-LN plus] Low Noise and Improved Long Term Frequency Stability
[-PHS] Phase Coherence Switching (*Requires Low Noise -LN or -LN plus)
[-FS] Fast Switching (per channel)
[-MOD] Analog Modulation (AM, FM, Phase Modulation)
[-VREF] Variable External Reference Input from 1 MHz to 250MHz
[-VF] Varied Frequencies - Different Frequency Ranges on Each Output
[-PE4.20] Power Extension down to -60dBm (Electrical Step Attenuator)
[-HI] High Isolation Chassis
[-GPIB] GPIB Communication Port
[-FLASH] MicroSD Card Slot (for removable SD Memory)
Model 855B-20-2CH
2 Channels, 300kHz - 20GHz Microwave/RF Signal Generator

Overview

Overview 

Applications

Features

  • Radar simulation
  • Quantum Computing
  • High volume Automated Testing
  • Phased Array Antenna/Beamforming
  • Electronic Warfare
  • SatCom R&D
  • Very Low Phase Noise
  • Industry Lowest Phase Drift
  • Ultra-Fast Switching
  • Phase-Coherent Switching option
  • Multi-channel Phase-Coherent outputs
  • Variable External Clock Reference Input

Specifications 
Number of Channels 2, 3 or 4 in 1U, 19" Rackmount. 
8 Channels in 3U Benchtop
Frequency Range 855B-6: 300 kHz to 6 GHz (settable to 6.5 GHz)
855B-12: 300 kHz to 12 GHz (settable to 12.5 GHz)
855B-20: 300 kHz to 20 GHz
855B-33: 300 kHz to 33 GHz
855B-40: 300 kHz to 40 GHz (settable to 42 GHz)
Resolution 0.001 Hz
Power Range  -20 to +25 dBm ( -60 dBm to +25 dBm with option PE4 )
Switching Speed (Sweep Mode) 500 µs (25 µs with option FS)
Phase Noise  (1 GHz CW) 10 Hz offset: -87 dBc/Hz [-100 dBc/Hz with option LN]
1 kHz offset: -130 dBc/Hz
20 kHz offset: -145 dBc/Hz
100 kHz offset: -150 dBc/Hz
Remote Control (SCPI v1999) Ethernet and USB, GPIB (optional)
Modulation  Pulse
Sweeps  List, Frequency, Power
Dimensions (W x L x H) 19" 1U enclosure: 19" x 18.25" x 1.75" [483 x 463 x 44mm ] for 2, 3 or 4 channels
19" 3U enclosure: 19" x 12.25" x 5.25" [483 x 311 x 133mm] for 8 channels 
Weight 2 Channels: 13 lbs (5.9 kg)
4 Channels: 17 lbs (7.7 kg)
8 Channels: 22 lbs (10 kg) 

Shipping Dimensions 23x23x19"
Shipping Weight 19 lbs

Front and Rear Panel Ports

Model 855B, 40GHz, 4 Channel, 1U 19" Rackmount Front Panel

  • Power Switch
  • Power and Remote Indicator
  • Pulse Modulation Input (x number of channels)
  • RF Active Indicator (x number of channels)
  • RF Output (x number of channels)
               855B-6, 855B-12 and 855B-20: 26GHz SMA
               855B-33 and 855B-40: k (2.92 mm) 

Model 855B Rear Panel

  • Equipment Ground Point
  • Dedicated 3 GHz Clock IN and OUT for High Stability Application
  • TRIG OUT and TRIG IN
  • REF OUT and REF IN
  • Communication (GPIB, LAN, and USB)
  • Fuse Protection and AC Power Entry

Frequently Asked Questions (FAQ) 

Front Office | How do I order a product for fast delivery ?

Front Office | How do I order a product for fast delivery ?

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. 

Model 855 | How many channels can you pack into a small enclosure ? 

Model 855 | How many channels can you pack into a small enclosure ? 

The Multi-Channel Model 855 allows for up to 4 channels in each 1U 19" rack Mount enclosure. This design can be stacked as needed. We believe this is the most compact multi-channel offering with high performance on the market. 

RF Configuration Options | What are the differences between LN and LN+?

RF Configuration Options | What are the differences between LN and LN+?

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. 

Downloadable Resources 

Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our downloads page.

Product Datasheets
• Product Firmware
• Product Software and Drivers
• Product Manuals

Media

Media 
Video URL 
Video title 
BNC introduces 40GHz RF/Microwave and 200us switching at IMS
Video URL 
Video title 
Model 855B-XX Multi-Channel Amplitude and Frequency Sweeps
Video URL 
Video title 
RF Signal Generators and PNTs for Antenna Measurements, Q-Bit Computing and more...
Video URL 
Video title 
Phase Coherent Switching Example
Video URL 
Video title 
Phase Matched Outputs
Video URL 
Video title 
Phase Memory in Single and Multi-Channel Signal Generators
Video URL 
Video title 
Quantum Computing - Tools of the Trade
Video URL 
Video title 
BNC Academy Webinar
Video URL 
Video title 
World's Most Compact Multi-Channel RF Signal Generator | BNC Webinar

Price List

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