Model 845 | 100 kHz to 12, 20, 26.5 GHz RF / Microwave Signal Generator


Berkeley Nucleonics' Model 845 RF Microwave Signal Generator is a low-noise and fast-switching microwave signal generator covering a frequency range from 100 kHz up to 26.5 GHz (with the option to extend the frequency to 9 kHz). The Model 845 Microwave RF Signal Generator offers a wide and accurately-levelled output power range with high spurious suppression. Advanced frequency synthesis with fractional-N divider makes for low SSB phase noise and micro-Hz frequency resolution.

The Model 845 is now available in 12, 20, & 26.5 GHz frequencies. In addition, the Model 845 can be customized and configured to each user's specific needs. Available with HP (high output power), LO (CW only, no modulation - only available on 20 GHz & 26.5 GHz), & R (1U rack mountable configuration).



  • R&D low noise signal source
  • Product testing
  • Service and maintenance
  • Signal simulation
  • Aerospace & Defense
  • Installation and maintenance
  • Radar receiver testing



  • High output power, low phase noise
  • Comprehensive AM, low-distortion, wideband DC-FM, and high-speed pulse modulation
  • Powerful trigger and sweeping modes
  • Portable battery operation



FrequencyRange: 100 kHz to 12 GHz, 20 GHz or 26.5 GHz
Resolution: 0.001 Hz
PowerRange: -20 to +15 dBm (-90 to +25 dBm with option PE3 and HP)
Resolution: 0.01 dB
Switching Speed 400 µs (<30 µs with option FS)
Phase Noise ( 1 GHz CW )10 Hz offset: -80 dBc/Hz
1 kHz offset: -117 dBc/Hz
100 kHz offset: -128 dBc/Hz
10 MHz offset: -150 dBc/Hz
Remote Control  (SCPI v1999)​Ethernet, USB
GPIB (GPIB option)
Modulation AM, FM, PM, Pulse, Chirp
Sweeps List, Frequency, Power
Dimensions (W x L x H)
6.77" x 10.63" x 4.21" [172 x 270 x 106 mm] 
5.5 lbs [2.5 kg]


Rich Set of Features in the Model 845 Series

The Model 845 Microwave RF Signal Generator also includes AM, DC-coupled, low distortion wideband-FM, PM, FSK and PSK, frequency chirp, and fast pulse modulation with an internal pulse train generator as standard. Three internal modulation sources are available, and all modulation modes can be combined. This allows the generation of complex modulation signals for modern communication and location systems.

The Model 845 is ideally suited for applications where a high-quality CW microwave source with analog modulation is required. The Model 845 operates with an ultra-stable temperature compensated 100 MHz reference (OCXO) and can be phase-locked to any external reference from 1 to 250 MHz. Additionally, the combination of pulse modulation and FM simulates Doppler effects or chirp signals. Simultaneous AM and pulse modulation provide the types of signals occurring in pulse radar applications with a rotating antenna. What's more, the combination of FM and AM can be used to check the fading effects of FM receivers.

The Model 845 operates on line or battery power making it useful for field applications or large laboratories. Although the Model 845 Microwave / RF Signal Generator introduces the smallest footprint in its class, it clearly can fill the largest shoes!


  • HP:High Output Power (+27 dBm)
  • LO: CW only, no modulation
  • R: 1U 19" Rackmount configuration
  • PE: Power range extension to -90 dBm
  • FS: Fast Switching. Substantially reduces the switching speed down to 10 us
  • RB: Internal Battery (cannot be combined with option -G)
  • G: GPIB interface (cannot be combined with option RB)
  • P/N7091: 3U 19" single/dual Rack Mount Kit
  • 9K: Frequency extension down to 9 kHz

Manuals and support documents

We offer BNC pulse generators only if end users are in Europe, other customers please contact BNC directly.