ArcLight Hub User’s Guide
Component Operating Procedures
Rev. 001 1081006 5-1
5. Hardware Components
5.1 Introduction
This chapter provides a discussion of each major component of the
ArcLight Network System and describes the software installation and
operation procedures. High level fault indications and troubleshooting
information are also provided for software functions.
Refer to the ArcLight Hub Installation and Hub Troubleshooting Guides
for hardware related installation and maintenance issues.
5.2 ArcLight Hub Subsystem
5.2.1 Hub Subsystem Overview
Table 5-1 lists the Hub source requirements and the subsequent
sections describe Hub components.
Table 5-1. NOC Hub Reference Source Requirements.
Spec.No. Description Limits
2 Frequency 10 MHz
3 Stability
1
Initial accuracy: 1x10
-8
(0.01 ppm)
Aging: 5x10
-9
/year
4 Stability over temperature
1
5x10
-9
5 Temperature range Operating: 0 to +50C
Storage: -20 to +70C
7 Reference phase noise 10 Hz: -90 dBc/Hz
100 Hz: -110 dBc/Hz
1 kHz: -130 dBc/Hz
> 10 kHz: -140 dBc/Hz
9 Warm-up @ 25C 5x10
-8
within 5 minutes of the frequency prior to
the reference being turned off for 1 hour.
10 Sinewave output Level: +13dBm into 50 ohms
Harmonics: < -45dBc
Spurs: < -70dBc
11 Squarewave output Level: TTL into 50 ohms
Duty Cycle: 50% +/- 5%
13 Supply 90 - 264 VAC
47 – 63 Hz
< 100W
14 Enclosure 19” Rack Mountable
Note 1: Can assume a GPS reference with up to 24 hour loss of signal.
The requirements listed are met using a Datum ET6000 reference, or
equivalent.
Refer to the ArcLight Hub Installation Guide for operational
environmental specifications.
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