Symmetricom 5402 manual Symmetricom 5401 Adjustments, Adjustment Locations

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Operating Manual

Installation

The 5401 is now operational and will begin to discipline the Rubidium using the control parameters that were previously stored in battery-backed RAM when the unit was last powered-down.

Symmetricom 5401 Adjustments

The amplitude of each of the 10 MHz outputs can be individually adjusted with potentiometers located on the 3-Channel Distribution Amplifier (Assembly 35039).

In order to gain access to these adjustments, do the following: (The 5401 is viewed from the rear.)

1.Remove the screws that secure the left side panel to the unit. Remove the side panel.

2.Remove the screws that secure the back panel to the unit, including the capacitor bracket.

The two Distribution Amplifiers (Assembly 35039) are located one on top of the other, as shown in Figure 3 below.

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On the top amplifier, R1 adjusts the output on front panel SMA J7. On the top amplifier, R18 adjusts the output on front panel SMA J8. On the top amplifier, R22 adjusts the output on front panel SMA J9. On the bottom amplifier, R1 adjusts the output on front panel SMA J10. On the bottom amplifier, R18 adjusts the output on front panel SMA J11. On the bottom amplifier, R22 adjusts the output on front panel SMA J12.

Figure 3 5401 Adjustment Locations

PN 8500-0150, Rev. A, May 2005

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Image 12 Contents
Airborne Disciplined Rubidium Oscillator Symmetricom, Inc Limited Warranty Operating Manual PrefaceWhere to Find Answers to Product and Document Questions Limitation of LiabilityProprietary Notice Conventions Used in This Guide When text appears It means This way Operating Manual Preface Typographical ConventionsOperating Manual Contents PN 8500-0150, Rev. A, May Contents-1 Specifications Operating ManualProduct Overview Operating Manual IntroductionSymmetricom 5401 Airborne Disciplined Rubidium Oscillator Symmetricom 5402 Disciplined Rubidium OscillatorInstallation Symmetricom 5401 Installation ProcedureOperating Manual Installation Unpacking and InspectionSymmetricom 5401 Adjustments 5401 Adjustment LocationsSymmetricom 5402 Rack Mounting Procedure Symmetricom 5402 Installation Procedure Symmetricom 5402 AdjustmentsSymmetricom 5402 Initial Operation RS-232 Input/Output Operating Manual OperationOperating Manual Operation DRO Commands Via RS-232 Status RequestDiscipline Off DescriptionDiscipline On Dynamic Gain ControlEnter KM Enter KO1, KO2Minutes Enter Disgain Enter Resync ThresholdEnter Resync Delay Enter Rate ThresholdBurst Status On Burst Status OffStatus will be output every second Turns burst status offDRO Discipline Sequence Flowchart Request TIEnter DAC Value Request Firmware VersionDTyyy Firmware Number PN 8500-0150, Rev. A, May Enter Start-up Parameters Request Start-up ParametersOperating Manual Operation Revision Letter of Firmware Calibrate Unit Response Format DescriptionSet Defaults Returns the unit to a default state Default ValuesRequest Setup Parameters Enter 1 PPS Offset not implementedInput Threshold High/Low Enter Programmable Delay Value Enter Oscillator Control Range not implementedDesign Verify On/Off Cal Status Enter Estimation Filter Time ConstantEnter Dynamic Gain Factors Input Specifications and Characteristics Operating Manual SpecificationsInput Specifications and Characteristics Output Specifications and Characteristics Output Specifications and CharacteristicsCoherence a Indicators Front Panel 5401 Indicators Front Panel5402 Indicators Front Panel DRO Internal Time BasesOperating Manual Specifications DRO Internal Time Bases MHz Oven Oscillator10 MHz Oven Oscillator Dimensions WeightApproximately 8 pounds Approximately 10 pounds PN 8500-0150, Rev. A, MayEnvironment EMI