T801-4 Installation and Operation Manual
Specifications
85
© Tait Electronics Limited September 2007
Weight
One Satsync 7 module
Two Satsync 7 modules
2.6kg (5.7lb)
2.9kg (6.4lb)
Physical (Continued)
Frequency Reference Outputs
Impedance
50
Ω
Signal Type
sine wave, levels programmable from 185mVpp to
2Vpp (approx. –10dBm to +10dBm)
Frequency Range
50Hz to 25MHz
Frequency Resolution
0.025Hz
Signal-to-Noise Ratio
a
73dB down on the signal, with 2nd and 3rd harmonics
at 58dB down
a. For an output level of 1Vpp at 1MHz.
Accuracy
b
With a valid GPS fix, and master
oscillator locked
tends to ±1 part in 3
×
10
9
(depending on the
installation)
Without a valid GPS fix, and master
oscillator control voltage fixed
subject to ±1 part in 5
×
10
7
(±0.02ppm), over the
quoted temperature range
Without a valid GPS fix, and master
oscillator following an ageing trend
determined by the ageing correction process
c
or, if
there is insufficient long-term data, by the
characteristics of the crystal
b. Accuracy is determined by comparing the master oscillator frequency with the GPS-derived 1PPS signal. The figures given
here are typical of systems examined in a stable environment, and are subject to variation of the GPS 1PPS signal, which
will average out over time.
c. Refer to
“Ageing Correction Process” on page 30
.
Crystal Ageing Characteristics
d
First Year
e
Later Years
±0.1ppm
±0.1ppm/year
d. As specified by the manufacturer.
e. After initial 30-day running time.
