SKO: Compact Sapphire Oscillator

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SBO fitted with air-cooled fins The SKO is a knock-out oscillator that delivers very high performance and outstanding value for money. This new design:

  • is compact and ruggedly packaged
  • is quicker to start up and lock
  • delivers an improved temperature range of 0—60°C
  • delivers free-running frequency accuracy
  • offers new, smart self-monitoring

SKO phase noise

Signal Characteristics

Output Frequency 10.240 GHz
Factory Set Accuracy
 ±2ppm typical (free running)
Output Power +10 dBm to +14 dBm (Typ +12 dBm at 25°C)
Phase Noise at 10 GHz
Offset Guaranteed
100 Hz -100 dBc/Hz
1 kHz -130 dBc/Hz
10 kHz -153 dBc/Hz
100 kHz -165 dBc/Hz
1 MHz -173 dBc/Hz
Discrete Spurious Tones
Less than +5 - 40 log(fm) dBc; fm < 2,375 Hz
Less than -130 dBc; 2,375 Hz < fm < 6.4 MHz
Less than -90 dBc, fm = 10 MHz
Amplitude Noise
Offset Guaranteed
100 kHz -130 dBc/Hz
1 kHz -142 dBc/Hz
10 kHz -154 dBc/Hz
100 kHz -168 dBc/Hz
1 MHz -170 dBc/Hz
Vibration Sensitivity
 Gamma (measured with no vibration isolation)
  • Guaranteed: less than 7 × 10-10/g
  • Typical: less than 3 × 10-10/g
  • Specified phase noise is quoted as a "single oscillator" measurement
  • The oscillator is phase lockable to an external 10MHz low-noise quartz reference (contact us for details).
  • Phase drift when locked < 20º s-1, typically < 2º s-1 under stable operating temperature.
  • Less than 7 minutes to frequency lock at operating temperature extremes. Less than 2 minutes at 25°C.

Electronic Input/Output

Power in:

  • ±15 DC
  • male 15 way sub-D connector (conforms to MIL-C-24308)

Supervisory and control:

  • TTL/LVTTL status of SKO operating conditions and self-test status
  • Female 15 way micro-D connector (conforms to MIL-C-83513)

Crystal reference in:

  • 10 MHz low noise crystal source
  • +10 dBm (nominal); +6 dBm (min); +12 dBm (max)
  • 50 Ω
  • SMA (F) connector
RF output: SMA (F) connector

Physical Specifications

Dimensions (approx) Cooling plate option: 241mm x 210mm x 78mm
Air-cooled option: 221mm x 221mm x 104mm
Weight Approx. 5.6kg (12.4lbs) depending on cooling configuration
Shipping weight approx. 8kg (20lbs)
Storage environment -50 to +80°C, relative humidity 0 to 100% condensing.
Operating environment 0 to 60°C, relative humidity 0 to 100% condensing.

Outline drawings of the SKO with conduction plate can be downloaded here.

Outline drawings of the air cooled SKO can be downloaded here.

Notes

  • Poseidon Scientific Instruments has a continuous development policy and features are subject to change without notice.
  • Phase and amplitude noise measurements are based on techniques specified in National Institute of Standards and Technology (NIST) Technical Note 1337.
  • Supplemental characteristics are supplied to provide further useful information and should be treated as “typical” performance. Actual performance may vary depending on operating environment and other factors.