Jackson Labs Mini-JLT GNSS, Руководство пользователя

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Mini-JLT GNSS™
User Manual
34 © 2017 Jackson Labs Technologies, Inc.
3.10.4 SERVo:DACGain
This command is used for factory setup.
3.10.5 SERVo: EFCScale
Controls the Proportional part of the PID loop. Typical values are 0.7 (double oven OCXO) to 6.0
(simple single oven OCXO). Larger values increase the loop control at the expense of increased noise
while locked. Setting this value too high can cause loop instabilities.
This command has the following format:
SERVo: EFCScale <float>[0.0 , 500.0]
3.10.6 SERVo:EFCDamping
Set’s the Low Pass filter effectiveness of the DAC. Values from 2.0 to 50 are typically used. Larger
values result in less noise at the expense of phase delay.This command has the following format:
SERVo:EFCDamping <float>[0.0 , 4000.0]
3.10.7 SERVo:SLOPe
The parameter determines the sign of the slope between the EFC and the frequency variation of the
OCXO. This parameter should be set to match your OCXO’s EFC frequency slope. This command
has the following format:
SERVo:SLOPe <NEG | POS >
3.10.8 SERVo:TEMPCOmpensation
This command is not supported on the Mini-JLT™ board.
3.10.9 SERVo:AGINGcompensation
This parameter is a coefficient that represents the drift of the EFC needed to compensate the natural
drift in frequency of the OCXO due to aging. This coefficient is automatically computed and adjusted
over time by the Jackson Labs Technologies, Inc. firmware. This command has the following format:
SERVo:AGINGcompensation <float> [-10.0, 10.0]
3.10.10 SERVo:PHASECOrrection
This parameter sets the Integral part of the PID loop. Loop instability will result if the parameter is
set too high. Typical values are 10.0 to 30.0. This command has the following format:
SERVo:PHASECOrrection <float> [-100.0, 100.0]