Spectracom NetClock 9489 - 10 Mhz Output - Oscillator Phase Noise (Dbc;Hz); Mechanical and Environmental Specifications

Oscillator Type Accuracy
Standard OCXO 2x10
-12
typical 24-hour average locked to GPS
1x10
-9
per day typical aging unlocked
TCXO 1x10
-11
typical 24-hour average locked to GPS
1x10
-8
per day typical aging unlocked
Note: Oscillator accuracies are stated as fractional frequency (i.e. the relative fre
quency departure of a frequency source), and as such are dimensionless.
See also "Configuring the Oscillator" on page215.
Table 1-5:
10 MHz output — oscillator stability
Oscillator Type
Medium-Term Stability
(without GPS after 2 weeks of GPS
lock)
Short-Term Stability (Allan vari
ance)
Temperature
Stability
(p˗p)
1sec. 10sec. 100 sec.
Rubidium 5x10
-11
/month (3x10
-11
/month typ
ical)
2x10
-11
2x10
-12
2x10
-12
1x10
-10
Standard
OCXO
5x10
-10
/day 5x10
-10
5x10
-11
1x10
-11
5x10
-9
TCXO 1x10
-8
/day 2x10
-9
1x10
-9
3x10
-10
1x10
-6
1.10.10.1 10 MHz Output — Oscillator Phase Noise (dBc/Hz)
Oscillator Type @ 1Hz @ 10Hz @ 100Hz @ 1KHz @ 10KHz
Rubidium ˗80 ˗98 ˗120 ˗140 ˗140
Standard OCXO ˗95 ˗123 ˗140 ˗145 ˗150
TCXO ./. ./. ˗110 ˗135 ˗140
1.10.11 Mechanical and Environmental Specifications
Dimensions:
Designed for EIA 19” rack mount:
Housing w/o connectors and brackets:
16.75” W x 1.72” H [1U] x 14.33” D actual
(425 mm W x 44 mm H x 364 mm D)
1.10 Specifications
CHAPTER 1 • NetClock User Reference Guide Rev. 16
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