Soft dB Mk3-PLL Open Source SPM Controller & PLL Spec sheet - Manual (Page 3)

Open Source SPM Controller & PLL
Model Mk3-PLL
PLL ModuLe sPeCIFICatIoNs
Input range ± 10 V
output range ± 10 V (external 1/100 and 1/1000 attenuators provided)
Frequency range 3.2 kHz to 75 kHz
resonator test Board An active resonator board is included with the SPM controller for easy testing and setup of the PLL module
PLL output signal ranges
(stand-alone operation)
excitation Frequency
excitation amplitude
resonator Phase
resonator amplitude
± 2.85 mHz
± 1.19 μV
± 6.83 μ degree
± 1.19 μV to ± 23.9 kHz
to ± 10 V
to ± 57.3 degree
to ± 10 V
PLL signal noise Levels*
Phase Controller
Bandwidth: 1 khz Phase Controller
Bandwidth: 5 hz
excitation Frequency 60 mHz RMS 20 μHz RMS
resonator Phase 4 m degree RMS 200 μ degree RMS
amplitude Controller
Bandwidth: 7.5 hz amplitude Controller
Bandwidth: 1.5 hz
excitation amplitude 400 μV RMS 50 μV RMS
resonator amplitude 5 μV RMS 2 μV RMS
Phase/amplitude (PaC)
detector Bandwidth
100Hz to 10kHz. The bandwidth is automatically adjusted when the loop auto-set function is used
software Features
• Resonator frequency sweep for automatic measurement of resonator frequency characteristics
• Loop-gain auto-set for amplitude and phase controllers. Gains are set according to desired
closed-loop bandwidth
• In-circuit closed-loop step response measurement function validates the setup of both controllers
• Adjustable low-pass filter on PLL signals: Excitation amplitude/frequency and Resonator
phase /amplitude. These filters can be adjusted from 1.5 Hz to 16 kHz or bypassed.
• Real time monitoring of all PLL signals
• Long term monitoring of PLL signals to assess the low frequency stability and noise
temperature Coefficient
• TCXO Stability 140 ppb over a temperature range from -20 °C to 70 °C
• TCXO Precision 2 ppm
1040, avenue Belvédère, bureau 215, Québec (Québec) G1S 3G3 Canada | [email protected] | www.softdb.com
* Note: Noise levels are measured using the resonator board included with the SPM controller (gain –13 dB at the resonance) and the auto-set
of loop gains for both controllers. The new PLL technique ensures that the noise levels are independent of measurement ranges.