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 |
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Frequency Range: | 6 GHz (settable to 6.5GHz) 12 GHz 20 GHz 33 GHz 40 GHz (settable to 42GHz) |
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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) |
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Model 855B-20-2CH
2 Channels, 300kHz - 20GHz Microwave/RF Signal Generator
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Overview
Applications |
Features |
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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
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