Symmetricom 5401, 5402 manual Design Verify On/Off

Page 31

Operating Manual

Operation

The srr.rrrr is a number from -99.9999 to +99.9999 microseconds per second. The number is frequency change from DAC = 00000 to 65535 of the unit. This number is used in the discipline algorithm to help compensate for oscillators with different frequency

Note: It is assumed that the DAC output and oscillator control are linear. If not, then the oscillator control range should be extrapolated from a subset of the control curve that is near zero frequency error.

Response Format:

Design Verify On/Off

Command Format:

Description:

Determines whether filtered rate or filter offset is returned in a status request. When x = 0, the extra data is not included. When x = 1, the extra data is included.

The response to the status command is changed to the following:

Frr.rrrrrr - Filtered rate in microseconds; rr.rrrrrr is the an average frequency rate error calculated internally by the unit. This is one of the values used by the program to determine the dynamic gain.

Oyyyyyy.yyy - Filtered offset in microseconds; yyyyyy.yyy is the an average time error calculated internally by the unit. This is one of the values used by the program to determine the dynamic gain.

Response Format:

PN 8500-0150, Rev. A, May 2005

23

Image 31 Contents
Airborne Disciplined Rubidium Oscillator Symmetricom, Inc Operating Manual Preface Limited WarrantyLimitation of Liability Where to Find Answers to Product and Document QuestionsProprietary Notice Conventions Used in This Guide Operating Manual Preface Typographical Conventions When text appears It means This wayPN 8500-0150, Rev. A, May Contents-1 Operating Manual ContentsOperating Manual SpecificationsOperating Manual Introduction Product OverviewSymmetricom 5402 Disciplined Rubidium Oscillator Symmetricom 5401 Airborne Disciplined Rubidium OscillatorUnpacking and Inspection InstallationSymmetricom 5401 Installation Procedure Operating Manual Installation5401 Adjustment Locations Symmetricom 5401 AdjustmentsSymmetricom 5402 Rack Mounting Procedure Symmetricom 5402 Adjustments Symmetricom 5402 Installation ProcedureSymmetricom 5402 Initial Operation Operating Manual Operation RS-232 Input/OutputStatus Request Operating Manual Operation DRO Commands Via RS-232Description Discipline OffDynamic Gain Control Discipline OnEnter KO1, KO2 Enter KMMinutes Enter Resync Threshold Enter DisgainEnter Rate Threshold Enter Resync DelayTurns burst status off Burst Status OnBurst Status Off Status will be output every secondRequest TI DRO Discipline Sequence FlowchartRequest Firmware Version Enter DAC ValueDTyyy Firmware Number PN 8500-0150, Rev. A, May Request Start-up Parameters Enter Start-up ParametersOperating Manual Operation Revision Letter of Firmware Response Format Description Calibrate Unit Returns the unit to a default state Default Values Set DefaultsEnter 1 PPS Offset not implemented Request Setup ParametersInput Threshold High/Low Enter Oscillator Control Range not implemented Enter Programmable Delay ValueDesign Verify On/Off Enter Estimation Filter Time Constant Cal StatusEnter Dynamic Gain Factors Operating Manual Specifications Input Specifications and CharacteristicsInput Specifications and Characteristics Output Specifications and Characteristics Output Specifications and CharacteristicsCoherence a DRO Internal Time Bases Indicators Front Panel5401 Indicators Front Panel 5402 Indicators Front PanelMHz Oven Oscillator Operating Manual Specifications DRO Internal Time Bases10 MHz Oven Oscillator Approximately 10 pounds PN 8500-0150, Rev. A, May DimensionsWeight Approximately 8 poundsEMI Environment