1Overview
The Model 845-OEM is a compact, board-level RF signal generator built for integration into custom test systems, automated equipment, and embedded designs. A shielded enclosure keeps the output clean in dense or electrically noisy environments, so the module holds its phase-noise and spurious performance once it is built into a larger system.
It carries the synthesis core of the Model 845 in an OEM form factor: wide frequency coverage, 0.001 Hz resolution, fast switching, and full modulation, all controllable through the BNC GUI or over standard remote interfaces.
2Key Features
- High output power. +27 dBm with option HP.
- Wide frequency range. 100 kHz to 26.5 GHz (page title states 20 GHz; verify).
- Excellent phase noise performance.
- Fine resolution. 0.001 Hz frequency, 0.01 dB power.
- Phase lock capability for synchronized systems.
- Fast frequency switching.
- BNC GUI integration with control via USB, Ethernet, and optional GPIB.
- Shielded enclosure for clean performance in noisy environments.
3Frequency & Output Power
The Model 845-OEM tunes with 0.001 Hz resolution. The specification sections state a range of 100 kHz to 26.5 GHz, while the page title states 100 kHz to 20 GHz; see the verification note in Section 1.
Standard leveled output power runs from -20 to +15 dBm with 0.01 dB resolution. With the HP high-output option, output reaches +27 dBm; contact the factory for levels above +25 dBm.
| Parameter | Value |
|---|---|
| Frequency range | 100 kHz to 26.5 GHz (page title states 20 GHz; verify) |
| Frequency resolution | 0.001 Hz |
| Output power range | -20 to +15 dBm (+27 dBm with option HP) |
| Power resolution | 0.01 dB |
4Phase Noise & Spectral Purity
SSB phase noise measured at 1 GHz CW:
| Offset from carrier | SSB phase noise (1 GHz CW) |
|---|---|
| 10 Hz | -80 dBc/Hz |
| 1 kHz | -117 dBc/Hz |
| 100 kHz | -128 dBc/Hz |
| 10 MHz | -150 dBc/Hz |
5Modulation
The Model 845-OEM supports AM, FM, PM, pulse, and chirp modulation. External modulation inputs are brought out on MCX connectors. For CW-only builds, the NM option removes modulation.
- AM amplitude modulation (external input on MCX).
- FM frequency modulation (external input on MCX).
- PM phase modulation (external input on MCX).
- Pulse pulse modulation (external input on MCX).
- Chirp swept-frequency stimulus.
6Frequency Switching & Sweep
Standard switching speed is 400 microseconds. With the FS fast-switching option, switching drops to under 30 microseconds. List, frequency, and power sweeps support automated measurement.
| Parameter | Specification |
|---|---|
| Switching speed (standard) | 400 µs |
| Switching speed (option FS) | <30 µs |
| Sweep modes | List, Frequency, Power |
7Specifications
| Specification | Value |
|---|---|
| Frequency range | 100 kHz to 26.5 GHz (page title states 100 kHz to 20 GHz; verify) |
| Channels | 1 (single channel; verify) |
| Frequency resolution | 0.001 Hz |
| Output power range | -20 to +15 dBm (+27 dBm with option HP) |
| Power resolution | 0.01 dB |
| Switching speed | 400 µs (<30 µs with option FS) |
| Phase noise @ 1 GHz CW (10 Hz) | -80 dBc/Hz |
| Phase noise @ 1 GHz CW (1 kHz) | -117 dBc/Hz |
| Phase noise @ 1 GHz CW (100 kHz) | -128 dBc/Hz |
| Phase noise @ 1 GHz CW (10 MHz) | -150 dBc/Hz |
| Harmonics | (verify) |
| Spurious | (verify) |
| Modulation types | AM, FM, PM, Pulse, Chirp |
| Sweep modes | List, Frequency, Power |
| RF output connector | SMA |
| Reference clock | MCX in and out |
| External modulation inputs | MCX (AM, FM, PM, Pulse) |
| Trigger input | MCX |
| Function output | MCX (trigger output, low-frequency generator, pulse video out) |
| Indicator | 2-pin Molex RF On/Off LED |
| Remote control protocol | SCPI v1999 |
| Connectivity / interfaces | Ethernet, USB, GPIB (optional) |
| Form factor | Board-level / OEM (shielded enclosure) |
| RF board dimensions | 9.65 x 1.4 x 9.06 in (245 x 35 x 230 mm) |
| Controller board dimensions | 3.94 x 0.5 x 8.1 in (100 x 12.7 x 205.7 mm) |
| Controller board dims (FS option) | 3.94 x 0.5 x 8.5 in (100 x 12.7 x 216 mm) |
| Shipping dimensions | 7 x 9 x 13 in |
| Shipping weight | 8 lbs |
| Power supply / consumption | (verify; spare P/N 7134) |
8Interfaces & Form Factor
The Model 845-OEM ships as a shielded board-level package. The RF board measures 9.65 x 1.4 x 9.06 inches; the controller board measures 3.94 x 0.5 x 8.1 inches, growing to 8.5 inches long with the FS option. The RF output is SMA; reference clock, external modulation inputs, trigger input, and the function output are brought out on MCX connectors. A 2-pin Molex header drives an RF On/Off LED.
Remote control follows SCPI v1999 over Ethernet and USB, with GPIB available as an option. The BNC GUI provides a software control surface for bring-up and test.
9Options & Configurations
| Option | Description |
|---|---|
| -HP | High output power (contact factory for greater than +25 dBm) |
| -9K | Frequency range extension down to 9 kHz |
| -NM | CW only, no modulation |
| -FS | Fast switching (<30 µs) |
| -LN | Low noise |
| -GPIB | GPIB communication port |
Accessories
- Spare power supply (P/N 7134)
10Applications
- Automated test environment
- Signal simulation
- Aerospace and defense
- Low-noise microwave source for R&D
11Ordering
Specify the Model 845-OEM and append option codes as needed. Confirm the configured frequency range with the factory given the published 20 GHz / 26.5 GHz discrepancy. For a configured quote, contact Berkeley Nucleonics.
| Model | Configuration |
|---|---|
| 845-OEM | 100 kHz to 26.5 GHz shielded board-level signal generator (range verify) |
Berkeley Nucleonics Corporation · info@berkeleynucleonics.com · 800-234-7858