EndRun PDC3301 User manual

"Smarter Timing Solutions"
PDC3301
Pulse Distribution Chassis
User Manual
USM3301-0000-000 Revision 11
January 2018

PDC3301 User Manual
PDC3301
Pulse Distribution Chassis User Manual
Preface
Thank you for purchasing the Pulse Distribution Chassis. Our goal in developing this product is to
bring you a distribution chassis that will quickly, easily and reliably meet or exceed your system re-
quirements. Your new PDC3301 is fabricated using the highest quality materials and manufacturing
processes available today, and will give you years of trouble-free service.
About EndRun Technologies
EndRun Technologies is dedicated to the development and renement of the technologies required to
fulll the demanding needs of the time and frequency community.
The instruments produced by EndRun Technologies have been selected as the timing reference for a
variety of industries and applications - computer networks, satellite earth stations, power utilities, test
ranges, broadcast and telecommunications systems and more.
EndRun Technologies is committed to fullling your precision timing needs by providing the most
advanced, reliable and cost-effective time and frequency equipment available in the market today.
Trademark Acknowledgements
IBM-PC, UNIX, Windows NT are registered trademarks of the respective holders.
Part No. USM3301-0000-000 Revision 11
January 2018
Copyright © EndRun Technologies 2007-2018

PDC3301 User Manual
PDC3301 User Manual
About This Manual
This manual will guide you through simple installation and set up procedures.
Introduction – The Pulse Distribution Chassis, how it works, where to use it, its main features.
Basic Installation – How to connect, congure and test your distribution chassis.
Console Port – Description of the console commands for use over the serial port or optional network
port.
If you detect any inaccuracies or omissions, please inform us. EndRun Technologies cannot be held
responsible for any technical or typographical errors and reserves the right to make changes to the
product and manuals without prior notice.
Warranty
This product, manufactured by EndRun Technologies, is warranted against defects in material and
workmanship for a period of two years from date of shipment, under normal use and service. During
the warranty period, EndRun Technologies will repair or replace products which prove to be defec-
tive.
For warranty service or repair, this product must be returned to EndRun Technologies. Buyer shall
prepay shipping charges to send product to EndRun Technologies and EndRun Technologies shall
pay shipping charges to return product to Buyer. However, if returned product proves to be operating
normally (not defective) then Buyer shall pay for all shipping charges. If Buyer is located outside the
U.S.A. then Buyer shall pay all duties and taxes, if any.
Products not manufactured by EndRun Technologies but included as an integral part of a system (e.g.
peripherals, options) are warranted for ninety days, or longer as provided by the original equipment
manufacturer, from date of shipment.
Limitation of Warranty
The foregoing express warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer or User, Buyer-supplied software or interfacing, unauthorized modication or
misuse, operation outside of the environmental specications for the product, or improper site prepa-
ration or maintenance.
TO THE EXTENT PERMITTED BY LAW, THIS WARRANTY AND REMEMDIES SET FORTH
ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, REMEDIES AND
CONDITIONS WHETHER ORAL OR WRITTEN, STATUTORY, EXPRESS, OR IMPLIED. AS
PERMITTED BY APPLICABLE LAW, ENDRUN SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

PDC3301 User Manual
PDC3301 User Manual
Warranty Repair
If you believe your equipment is in need of repair, call EndRun Technologies and ask for a customer
service agent. It is important to contact us rst as many problems may be resolved with a phone call.
Please have the serial number of the unit and the nature of the problem available before you call. If
it is determined that your equipment will require service, we will issue an RMA number. You will be
asked for contact information, including your name, address, phone number and e-mail address.
Ship the unit prepaid in the original container or a container of sufcient strength and protection to
EndRun Technologies. EndRun will not be responsible for damage incurred during shipping to us.
Be sure the RMA number is clearly identied on the shipping container. Our policy is to x or repair
the unit within 5 business days. If it is necessary to order parts or if other circumstances arise that
require more than 5 days, an EndRun service technician will contact you.
Loaner units are not included as part of the standard warranty.
Repair After Warranty Expiration
If the warranty period has expired, we offer repair services for equipment you have purchased from
EndRun. Call and ask for a customer service agent. It is important to contact us rst as many prob-
lems may be resolved with a phone call. Please have the serial number of the unit and the nature
of the problem available before you call. If it is determined that the equipment has failed and you
want EndRun to perform the repairs, we will issue you an RMA number. Ship the unit prepaid in
the original container or a container of sufcient strength and protection to EndRun Technologies.
EndRun will not be responsible for damage incurred during shipping to us. Customer is responsible
for shipping costs to and from EndRun Technologies. Be sure the RMA number is clearly identied
on the shipping container. After the equipment has been received we will evaluate the nature of the
problem and contact you with the cost to repair (parts and labor) and an estimate of the time neces-
sary to complete the work.
Limitation of Liability
The remedies provided herein are Buyer’s sole and exclusive remedies. EndRun Technologies shall
not be liable for any direct, indirect, special, incidental or consequential damages, whether based on
contract, tort or any other legal theory.
EndRun Contact Information
Address: EndRun Technologies
2270 Northpoint Parkway
Santa Rosa, California 95407
U.S.A.
Phone: [phone]
Fax: [phone]
Sales: 1-877-749-3878 or [phone]
[email protected]
Support: 1-877-749-3878 or [phone]
[email protected]

PDC3301 User Manual
PDC3301 User Manual

PDC3301 User Manual
PDC3301 User Manual
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
About EndRun Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Trademark Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Limitation of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Warranty Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Repair After Warranty Expiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
EndRun Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iii
Chapter One - Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Main Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Performance, Reliability and Reasonable Cost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Easy Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Free FLASH Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Switching Capabilities and Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Chapter Two - Basic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Checking and Identifying the Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PDC3301 Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installing the PDC3301 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mount the PDC3301 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connecting the DC Power Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connect Serial I/O to Host Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Connect Signal Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

PDC3301 User Manual
PDC3301 User Manual
Connect Disable Inputs (External Alarm Inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Connect Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter Three - Control and Status Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Available User Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Detailed Command Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
alarmlist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
alarmstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
disablemode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
disablestat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
inpalign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
pwrstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ratea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
rateb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
respmode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
selectedin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
siginstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
sigoutstat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
switchmode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
upload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
RS-232 Serial I/O Port Signal Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Appendix A - LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Input LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Output LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Alarm LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

PDC3301 User Manual
PDC3301 User Manual
Appendix B - Upgrading the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
What You Need To Perform the Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Performing the Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Problems with the Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Recover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Appendix C - Network Port Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Available User Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Detailed Command Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
netconfig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
netmac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
netpass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
netprotocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
netreset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
netsnmp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
netsnmpro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
netsnmprw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Upgrading Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
What You Need To Perform the Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Performing the Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Problems with the Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Appendix D - Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Special Modifications - Changes for Customer Requirements . . . . . . . . . . . . . . . . 31

PDC3301 User Manual

PDC3301 User Manual
1
"Smarter Timing Solutions"
Chapter One
Introduction
The PDC3301 Pulse Distribution Chassis is a 19” rack-mounted, dual-input, ten-output device for
high-performance pulse distribution with state-of-the-art intelligent failover switching and monitor-
ing capabilities. Status is locally observable on a cleanly designed front panel with LED indicators,
and it is fully manageable via RS-232 or an optional ethernet port. Redundant AC, DC or AC/DC
power inputs are optionally available.
Visit http://www.endruntechnologies.com/support.htm to download rmware upgrades and get the
latest manuals and other documentation.
Main Features
Overview
The PDC3301 may be employed either as a simple, single-input, ten-output signal distributor for non-
critical applications, or, by making use of its intelligent dual-input failover switching and redundant
power supply capabilities, high-availability signal distribution systems for top tier commercial and
military applications may be efciently implemented. The unit will accept a TTL or Open-Collector
Alarm output signal from the upstream signal source on each of its two external alarm inputs so that
bank switching of multiple PDC3301 units may be efciently and synchronously implemented.
Performance, Reliability and Reasonable Cost
It provides high performance and reliability combined with reasonable cost. Its internal sub-as-
semblies are fabricated with state-of-the-art components and processes and are integrated in a solid,
high-quality chassis.
Flexibility
It supports full user conguration of the input switching strategy and complete remote monitoring
and control via multiple industry-standard interfaces.
Easy Installation
Its standard 1U high, 19” rack-mountable chassis makes installation simple. All signal input and
output connectors are standard BNC female. AC power input is via IEC-320 standard power cord.
Connect it to your host computer using the standard RS-232 serial cable provided, or on ethernet
equipped units, use the 10/100Base-T RJ-45 connector and CAT-5 patch cable provided to connect
it to your network. Initial network conguration is automatic on networks using the Dynamic Host
Conguration Protocol (DHCP). Manual network conguration is via the RS-232 serial I/O port.
Free FLASH Upgrades
Firmware is stored in non-volatile FLASH memory, so the PDC3301 can be easily upgraded in the
eld using the local RS-232 port. We make all rmware upgrades for our products available to our
customers free of charge.

PDC3301 User Manual
2
CHAPTER ONE
3PDC3301 User Manual
Theory of Operation
Overview
The diagram below illustrates the PDC3301 architecture. Single or dual power supply operation is
supported with any combination of AC or DC input voltages. (Installation of a second power supply
is an option for the PDC3301.) The presence of proper voltage at the output of each of the two inter-
nal DC-DC converters is detected and monitored by the alarm logic and CPU. The outputs of these
two power supplies are diode “OR’d” to power the PDC3301. When both power supplies are good,
Power Supply A is active while Power Supply B is on standby.
Single or dual signal inputs are detected and monitored by the alarm logic and CPU. In addition,
single or dual TTL level disable inputs are monitored to allow switching based on the alarm output
from the upstream signal source. This external alarm signal can be connected to rear-panel BNC
connectors labeled “DISABLE IN”. These disable inputs are pulled up with 10k ohm resistors so
that they may be connected to an open-collector output signal. Based on the status of the signal input
level detection and the disable inputs, the alarm logic and CPU control the signal input switch. You
can congure a variety of automatic switching strategies and also manually force the selection of
either input.
The output signal from the switch is buffered and drives ten broadband output ampliers. Output
signal activity detectors for each of the ten channels are monitored by the alarm logic and CPU so
that output amplier failure or interconnect cable short circuits may be observed.
All status information is reported via the front panel LEDs and the serial I/O port or optional ethernet
interface. A summary open-collector alarm output is provided.
Switching Capabilities and Limitations
The A and B inputs are continuously measured by the PDC3301 as part of its intelligent failover
switching algorithm. The measured rate of the currently selected input is used to set a timeout
threshold in the alarm logic. If a pulse is missing from the selected input for longer than this timeout,
then a switch to the alternate input is performed. For pulse rates with positive pulse widths greater
than 500 nanoseconds, this switching can occur prior to the end of the pulse, preventing the loss of
even a single clock to the downstream equipment.
At higher pulse rates (greater than 1.008 MPPS), a divide-by-16 prescaler is inserted in the input
signal rate measurement path, and missing pulse detection/switching time is increased. For example,
with an input pulse rate of 10 MPPS, the switching time can range from 500 nanoseconds to about
2.1 microseconds, depending upon the state of the prescaler when its input signal goes missing.
For IRIG-B and pulse rates less than 1.008 MPPS, the alignment of the A and B input rising edges is
measured with 65 nanosecond resolution and reported using the inpalign command. Should the
applied A and B input pulse rates differ by more than 10 parts per million, a rate mismatch fault will
be asserted, and input alignment will not be measured.
The maximum positive duty cycle of either input signal should not exceed 50% to prevent excessive
power dissipation in the PDC3301. Should an input fail in a high state, the PDC3301 will detect it
and disconnect it from the output. Again, this is to prevent excessive power dissipation in the output
ampliers and power supply(ies). In this case, the response from the selectedin command will
be “NONE”. Once the problem has been resolved, you must issue the return command to restore
normal operation.

PDC3301 User Manual
2
CHAPTER ONE
3PDC3301 User Manual

PDC3301 User Manual
4
CHAPTER ONE

PDC3301 User Manual
5
"Smarter Timing Solutions"
Chapter Two
Basic Installation
This chapter will guide you through the most basic checkout and physical installation of your
PDC3301 Pulse Distribution Chassis. Subsequent chapters and appendices will give you the
information needed to congure your installation for the maximum performance in your operating
environment.
Checking and Identifying
the Hardware
Unpack and check all the items using the shipment packing list. Contact the factory if anything is
missing or damaged. The PDC3301 shipment typically contains:
• PDC3301 (part # 3301-0001-000 or #3301- variant)
• PDC3301 User Manual (part #USM3301-0000-000)
• IEC 320 AC Power Cord (part #0501-0003-000)
(This part will not be present if using the DC power option.)
• DB9F-to-DB9F Null Modem Serial I/O Cable (part #0501-0002-000)
• RJ-45 to RJ-45 CAT-5 patch cable, 2 meters (part #0501-0000-000)
(This part present only with units congured with the Ethernet Interface option.)

PDC3301 User Manual
6
CHAPTER TWO
7PDC3301 User Manual
BASIC INSTALLATION
PDC3301 Physical
Description
Power A/B LEDs These red/green LEDs indicate power input status. Green means the
power supply is good. Red means the power supply is installed but has
failed. Off means the optional power supply is not installed. Power
Supply B is on standby when both supplies are good.
Input A/B LEDs These red/green/yellow LEDs indicate the signal input status. For a
full description see Appendix A - LED Indicators.
Output 1-10 LEDs These red/green/yellow LEDs indicate the presence or absence of
signals at the output connectors. Green means the output is present and
red means the output is absent or shorted.
Alarm LED This red/green/yellow LED indicates the presence of a fault condition.
Green means there is no alarm condition. Red means an alarm condi-
tion exists. Use the alarmstat or alarmlist commands for more
information (see Chapter 3 - Control and Status Commands).
     
 
    
     
 
    


         
   
 
  

       


RS-232 Connector This DB-9M connector provides the RS-232 serial I/O interface to the
PDC3301. This allows the user to initialize, monitor and control the
PDC3301. See Chapter 3 - RS-232 Serial I/O Port Signal Definitions
for detailed information.
10/100Base-T Jack This optional RJ-45 connector mates with the ethernet twisted pair
cable from the network.
Signal Input A/B Jacks These two BNC connectors accept the A and B signal inputs.
Disable Input A/B Jacks These two BNC connectors accept the A and B logic level external
alarm inputs. If properly congured (see disablemode), a high level
on this input will disable the corresponding Signal Input.
Alarm Output Jack This BNC connector provides the open-collector Alarm output. This
output is asserted during the power-on/startup sequence and when an
alarm condition exists.
EndRun
EndRunEndRun
EndRun
     
   

     
 
 


     

 

PDC3301 User Manual
6
CHAPTER TWO
7PDC3301 User Manual
BASIC INSTALLATION
Signal Output 1-10 Jacks These ten BNC connectors provide the signal outputs.
AC Power Input Jack This IEC 320 standard three-prong connector provides AC power.
DC Power Input Block This optional 3-position terminal block provides connection to the
DC power source, and replaces the AC power input jack. See details
in Appendix D - Specifications.
Installing the PDC3301
FCC NOTICE
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruc-
tion manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
Mount the PDC3301
Using standard 19” rack mounting hardware, mount the unit in the desired location.
CAUTION
Ground the unit properly with the supplied power cord.
The socket outlet should be installed near the equipment and be easily accessible.
Power cord is used as a disconnection device. To de-energize equipment, disconnect the power cord. If
your PDC3301 has dual power supplies, then multiple power cords may be installed. To de-energize this
equipment, disconnect all power cords from the device.
Do not install the PDC3301 where the operating ambient temperature might exceed 122°F (50°C).
Connecting the DC Power Option
Connect the safety ground terminal to earth ground. Connect the “+” terminal to the positive output
of the DC power source. Connect the “-” terminal to the negative output of the DC power source.
Note that the PDC3301 has a “oating” internal power supply, therefore either the positive or nega-
tive output of the DC power source can be referenced to earth ground. This unit will not operate if
the +/- connections are reversed; however it will not be damaged by a reverse connection.

PDC3301 User Manual
8
CHAPTER TWO
SHOCK/ENERGY HAZARD
Install in Restricted Access Location.
Use 10-14 AWG copper wire only.
Terminal block screw torque: 9 in-lbs (1 nM).
Branch circuit must have circuit breaker, 15A or less.
Power must be sourced via two-pole disconnect device.
Install terminal block cover after wiring.
Connect Serial I/O to Host Computer
Using the standard null-modem DB9F-to-DB9F cable provided, connect one end to the PDC3301
connector labeled RS-232 and the other end to an available DB9M RS-232 connector on your host
computer. The factory default serial port parameters are 19200 baud, 8 data bits, no parity and 1 stop
bit. The PDC3301 does not use hardware or software handshaking, so make sure that your terminal
program is congured appropriately and disable all handshaking.
Connect Signal Inputs and Outputs
Using coaxial cables, connect your analog signal(s) to the Signal A and/or Signal B input(s) on the
PDC3301. The factory default for the PDC3301 switchmode setting is for the Signal A input to be
the primary and the Signal B input to be the secondary. You can change this by using the switch-
mode command over the serial I/O port.
Connect coaxial cables from each of the PDC3301 signal outputs to your equipment. Make sure
that these cables are terminated properly into 50 ohms. Failure to terminate these broadband outputs
could result in a multitude of problems.
Connect Disable Inputs (External Alarm Inputs)
If the source(s) of your reference signal(s) has (have) compatible TTL alarm output(s) that you would
like to use to force signal input switching on your PDC3301, connect these using coaxial cables to the
A and/or B disable input(s) on the PDC3301. The factory default for the PDC3301 disablemode
setting is to ignore these inputs. If you plan to use them, you will need to use the disablemode
command over the serial I/O port to congure them.
Connect Alarm Output
If you are using the PDC3301 summary alarm output, connect a coaxial cable from the equipment
that will be monitoring the PDC3301 to the alarm output on the PDC3301.

PDC3301 User Manual
9
"Smarter Timing Solutions"
Chapter Three
Control and Status Commands
This chapter describes the PDC3301 control and status commands. The PDC3301 supports com-
mands for performing initialization/setup and for monitoring the performance and status of the unit.
The serial I/O port physical and electrical characteristics are dened as well.
Available User Commands
COMMAND FUNCTION
alarmlist Shows a list of all current system alarms and OK if no alarms.
alarmstat Shows system alarm information as a series of zeros and ones.
Where ‘1’ means the alarm is asserted and ‘0’ means it is not.
An ‘x’ means it is not installed.
disablemode Congures Disable A and Disable B inputs.
disablestat Shows the current status of the Disable A and Disable B inputs.
A ‘1’ means the input is asserted and ‘0’ means it is not.
help Shows help for all distribution chassis commands.
inpalign Shows the phase alignment of the A and B inputs.
port Congures serial port baud rate, data bits, parity and stop bits.
pwrstat Shows the current status of the power supplies. A ‘1’ means the
power supply is operational. A ‘0’ means it is not.
ratea Shows the current pulse rate on Input A.
rateb Shows the current pulse rate on Input B.
reset This command will cause a system reset.
respmode Congures the way the serial port responds to commands,
either TERSE or VERBOSE.
return Tells the distribution chassis to return to the primary input.
selectedin Shows the currently selected signal input: A, B or NONE.
settings Shows all user setting commands which include DISABLE-
MODE, PORT, RESPMODE and SWITCHMODE.
siginstat Shows the current status of the signal inputs A and B. A ‘1’
means the signal is present and a ‘0’ means it is not.
sigoutstat Shows the current status of the signal outputs 1 through 10 as
a sequence of 10 characters. A ‘1’ means the signal is present
and a ‘0’ means it is not.
status Shows all system status commands which include ALARM-
LIST, ALARMSTAT, DISABLESTAT, PWRSTAT, SELECT-
EDIN, SIGINSTAT, and SIGOUTSTAT.

PDC3301 User Manual
10
CHAPTER THREE
11 PDC3301 User Manual
CONTROL AND STATUS COMMANDS
switchmode Congures the switching mode, AB, BA, A or B.
upload Starts a software upload process.
ver Prints the software and FPGA version information.
All entered commands are assumed to be terminated with a carriage return. Line feeds are ignored.
All responses from the PDC3301 are terminated with a carriage return and a line feed.
Detailed Command
Descriptions
alarmlist
This query-only command displays the current system alarms as a list of descriptive messages. The
following is an example:
Query: alarmlist
Chassis response: Input B signal absent
Disable B asserted
alarmstat
This query-only command displays the current system alarms as a series of characters, listed left to
right. Each character is a ‘0’, a ‘1’ or an ‘x’. A ‘1’ means the corresponding alarm is active. A ‘0’
means it is OK. An ‘x’ means the optional component is not installed in this particular unit.
Group 1 (6 characters) Group 2 (10 characters) Group 3 (4 characters)
Signal Input A absent Output 1 signal absent System Oscillator error
Signal Input B absent Output 2 signal absent Flash error
Disable A asserted Output 3 signal absent FPGA error
Disable B asserted Output 4 signal absent Network port error (option)
Power Supply A failed Output 5 signal absent
Power Supply B failed (option) Output 6 signal absent
Selected Input Stuck High Output 7 signal absent
A & B Input Rate Mismatch Output 8 signal absent
Output 9 signal absent
Output 10 signal absent
Query: alarmstat
Chassis response: 01000x00 0000000000 000x (An alarm exists on
Signal Input B. Also,
Power Supply B and the
Network Port are not
installed.)
NOTE
System alarms will clear automatically once the problem has been corrected.