30
TimeSource 3500
Description
097-72050-01 Issue 7: August 2003
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1
Antenna
The antenna types include a roof antenna, mechanical window
antenna, self-adhesive window antenna, or wall antenna. All
antennas include a GPS receiver, amplifier, and intermediate-
frequency (IF) downconverter.
The GPS Receiver extracts a clock signal from the GPS satellite
signals. The receiver can process the signals from all satellites in
view, while simultaneously using the Earth location of the receiver
and other factors to determine an accurate clock signal.
An amplifier provides signal gain.
The downconverter converts the L1-band GPS signal to IF for
long-distance transport on the coaxial antenna cable. The antenna
cable provides current from the shelf to the antenna, and
transports GPS satellite IF signals from the antenna to the shelf.
Antenna Installation and Lightning Protection
The TimeSource 3500 standard wall antenna kits do not include
lightning protectors. When the antenna is installed on the side of
the building, the antenna is in the zone of protection and is
protected from lightning strikes as described in the Standard for
the Installation of Lightning Protection Systems (NFPA 780), 2000
edition.
Table A. Timing Source Characteristics
Source
Characteristic
Local Oscillator
Short term stability
T1 Line
Intermediate term stability
GPS Signal
Long term stability
Содержание TimeSource 500
Страница 1: ...TimeSource 3500 GPS Primary Reference Source 097 72050 01 Issue 7 August 2003 ...
Страница 6: ...6 TimeSource 3500 Contents 097 72050 01 Issue 7 August 2003 ...
Страница 85: ...3 Chapter Installation This chapter is the sequential order of procedures for installation and power up ...
Страница 161: ...4 Chapter TL1 Reference This chapter provides information for using the TL1 language ...
Страница 271: ...6 Chapter Specifications This chapter provides equipment specifications ...
Страница 297: ...Index ...