Speci
fi
cations
The information in this section provides electrical, mechanical, and environmental
speci
fi
cations for the SPG8000 generator.
The performance requirements listed in the electrical characteristics portion of
these speci
fi
cations apply over an ambient temperature range of 0 °C to +50 °C.
The rated accuracies are valid when the instrument is calibrated at an ambient
temperature range of +20 °C to +30 °C, after a warm-up time of 20 minutes.
SPG8000 base unit speci
fi
cations
The following tables list certi
fi
cation and compliance information, and the
electrical, environmental, and mechanical characteristics of the SPG8000 base
unit.
Table 1: Timebase characteristics
Characteristic
Performance requirements
Reference information
Frequency accuracy in Internal
mode
±135 x 10
-9
over 1 year calibration
interval
After 20 minute instrument warm up. Includes
drift and temperature variation. Initial setting
after adjustment will typically be within 10 x 10
-9
.
Frequency accuracy over
temperature
±2 x 10
-9
for ±5 °C variation, ±10 x 10
-9
for 0 to 50 °C
Frequency drift, aging
< ±100 x 10
-9
per year for internal, stay
current frequency and stay genlock
modes at constant temperature
Frequency variation from vibration
and shock
±25 x 10
-9
typical from 6 ms half-sine
shocks over 20 g
Genlock range
±7.5 x 10
-6
SPG8000 Speci
fi
cations and Performance Veri
fi
cation
1
