DOC 6501_Release V
ATS-6501 Users Guide
121
Appendix A System Specifications
Environmental
Operating Temperature 0° - 50° C, 95% Humidity, non-condensing
Storage Temperature -20° - 70° C, 95% Humidity, non-condensing
Physical
Size 17”W x 19”D x 1.75”H.
Weight 20 Lbs (9.1kg) - two power supplies & 4 plug-in modules.
10 MHz Input
Quantity 1
Connector Type BNC (F)
Input Power +10 dBm to +17 dBm
Input Impedance 50
Timing Performance
UTC(USNO) Offset (w/ GPS)
- Precise Calibration 6501 15 nSec RMS
6501B 10 nSec RMS
- Coarse Calibration 100 ns RMS
Allan Deviation (Locked to GPS) ATS 6501 ATS 6501B
1 s 5E-12 6E-13
10 s 5E-12 8E-13
100 s 5E-12 8E-13
1000 s 6E-13
10000 s 6E-13
100000 s 1E-13
Temperature Stability 3e-10 (0 to 50° C)
Frequency Accuracy 1E-13 @ one day
Holdover Accuracy, 10Mhz Output 5E-11/month with internal Rb reference
Holdover in external reference mode is dependent on
the external reference
Ethernet Interface
Quantity 1
Connector RJ-45
Protocol TCP/IP
Speed 10/100 Base-T
Network Time Protocol (NTP) Server NTPv4 as defined in RFC-5905 compatible with
NTPv3 (RFC-1305) and earlier versions.
- Stratum Level 0/Level 1 when locked to GPS
- Client Support ~100 client request per second
File Transfer Protocol
- Log Files User:ftp, Password: ftp
- Software Update User: ftp, Password: ftp
Ports
- Command Port 1700
- Debug Port 1800
- Status Port 1900
- Real-Time GPS Data 1135
- TIC Average Data Port 2100
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