Brandywine RFS-700D User manual

!
!
P/N!900000181!REV!A!
1!
!
!
!
!
User%Manual!
RFS-700D!
Rubidium'Frequency'Standard!
DIN$Rail$Package!
P/N!001-0509!
!
900000181!REV.!A!
April!2020!
!
!
PREPARED!BY!
BRANDYWINE!COMMUNICATIONS!
1153!Warner!Avenue!
Tustin!CA.!92780!
CAGE!03NF8!
!
! !

!
!
P/N!900000181!REV!A!
2!
Revision(History!
REVISION
DATE
COMMENTS
ECO NUMBER
A
04/13/2020
INITIAL RELEASE
ECO11275
!

!
P/N!!900000181!REV.!A!
3!
Safety Warnings
WARNING:
The lightning flash with an arrowhead inside of an equilateral triangle is
intended to alert the user to the presence of un-insulated “dangerous voltage”
within the product’s enclosure. The “dangerous voltage” may be of sufficient
magnitude to constitute a risk of electrical shock to people.
CAUTION:
Observe all necessary precautions for handling electrostatic
discharge sensitive devices when handing component
modules. Improper handling will damage internal circuitry.

!
P/N!!900000181!REV.!A!
4!
Table of Contents
1!INTRODUCTION!...............................................................................................................................!5!
1.1!BASIC!CONCEPT!..............................................................................................................................................!5!
1.2!SYSTEM!OVERVIEW!.......................................................................................................................................!6!
1.3!SPECIFICATIONS!.............................................................................................................................................!6!
2!SETUP!..................................................................................................................................................!7!
2.1!INSTALLATION!................................................................................................................................................!7!
3!CONFIGURATION!.............................................................................................................................!8!
4!OPERATION!.......................................................................................................................................!9!
5!MAINTENANCE!..............................................................................................................................!10!
6!TROUBLESHOOTING!...................................................................................................................!11!
6.1!LEDS!.............................................................................................................................................................!11!
6.2!SNMP!...........................................................................................................................................................!11!
6.2.1!SNMPWALK-and-OIDs-.......................................................................................................................-12!
7!SUPPORT!INFORMATION!..........................................................................................................!13!
8!FRONT!PANEL!DRAWING!...........................................................................................................!14!
9!REAR!PANEL!DRAWING!.............................................................................................................!15!
10!PARTS!LISTS!................................................................................................................................!16!
11!MIB!FILE!.......................................................................................................................................!17!
!
!
Table of Figures
Figure!1!-!RFS-700D!..................................................................................................................................!5!
Figure!2!-!RFS-700D!...............................................................................................................................!11!
!
Table of Tables
!
! !

!
P/N!!900000181!REV.!A!
5!
1Introduction!
1.1 Basic!Concept!
!
Figure!1!-!RFS-700D!
Brandywine’s RFS-700D is a miniaturized Rubidium Frequency Reference in a
compact ruggedized package designed for mounting on a DIN rail system. The
RFS-700D is capable of outputting 7x 10MHz frequency reference with low phase
noise.
The!frequency!standard!includes!a!low!phase!noise!oven!controlled!quartz!
oscillator,!which!is!frequency!locked!to!the!rubidium!oscillator.!The!time!constant!of!
this!loop!is!selected!such!that!the!short!term!stability!(and!phase!noise)!of!the!
outputs!are!determined!by!the!OCXO!characteristics,!which!the!long!term!stability!is!
determined!from!the!rubidium!oscillator.!!!
The!frequency!standard!has!internal!temperature!sensors!that!are!used!to!
compensate!the!oscillator,!based!on!a!factory!calibration,!to!improve!the!overall!
accuracy!of!the!system.!!
The unit has been qualified under MIL-STD-810F for operation in demanding
environments.!

!
P/N!!900000181!REV.!A!
6!
1.2 System!Overview!
The!RFS-700D!receives!power!via!a!24!VDC!power!supply!via!a!DC!terminal!block!
connector,!and!outputs!seven!10MHz!reference!signals!via!50!Ω!SMA!connectors.!!In!
addition,!there!is!an!Ethernet!port!that!is!used!for!remote!management!and!control!
of!the!RFS-700D.!
1.3 Specifications!!
Power!
Input!Voltage!Range:! 18-28!VDC!
Nominal!Input!Voltage:! 24!VDC!
Input!Connector:! Terminal!Block!
Power!consumption:!15!W!
!
Output!
Connector!type:!SMA!
No.!of!connectors:! 7!
Output!Frequency:!10!MHz!
Output!impedance:! 50Ω!
Short!term!stability:! 1!E-11!
Aging:! 5!E-11!per!Month!
Phase!Noise!@!100Hz! -138!dBc/Hz!
Phase!Noise!@!1kHz! -151!dBc/Hz!
Phase!Noise!@10kHz! -165!dBc/Hz!
Phase!Noise!@100kHz! -165!dBc/Hz!!
!
Environmental!
Operating!temp.:! -40!deg.!C!to!+70!deg.!C!
Storage!temp.:! -40!deg.!C!to!+85!deg.!C!
Humidity:! 95%!Non-condensing!
Operating!Altitude:! 10,000!ft.!ASL!
Non-Operating!Altitude:! 50,000!ft.!ASL!
!
Ethernet!
Port!speed:!10/100BaseT!
Protocols!supported:!SNMPv3!
Fault!reporting:!Output!fail!(1-7),!Rb!Lock!Status,!PLL!lock!status,!
Over!current!(OCXO)temp.!
!
!

!
P/N!!900000181!REV.!A!
7!
2Setup!
2.1 Installation!!
Remove!the!RFS-700D!from!the!shipping!carton!and!protective!packaging.!!Mount!
the!RFS-700D!securely!onto!the!DIN!rail.!!Connect!the!unit!for!power!via!the!
terminal!block!connector!on!the!top!of!the!unit.!!Connect!the!10!MHz!outputs!to!the!
rest!of!the!equipment!in!the!cabinet!as!required.!

!
P/N!!900000181!REV.!A!
8!
3Configuration!
The!RFS-700D!is!configured!via!SNMPv3!over!the!included!Ethernet!port.!!Please!see!
the!attached!MIB!file!for!more!information.!

!
P/N!!900000181!REV.!A!
9!
4Operation!
The!RFS-700D!requires!no!user!intervention!for!normal!operations.!!For!
Maintenance!tasks,!please!refer!to!Chapter!5,!for!troubleshooting!procedures,!please!
refer!to!Chapter!6.!

!
P/N!!900000181!REV.!A!
10!
5Maintenance!
The!RFS-700D!requires!no!regular!maintenance!tasks!for!normal!operation.!!Care!
sure!be!taken!on!a!regular!basis!to!clean!the!unit!as!well!as!visually!inspect!it!for!
loose!or!frayed!connections,!as!well!as!making!sure!that!the!power!and!frequency!
output!connectors!are!firmly!connected.!