Radyne ComStream SFC6400A - Page 40

SFC6400A/SFC1450A Synthesized Frequency Upconverter User Interfaces
TM106 – Rev. 1.1 4-17
C-Band Upconverter (70
MHz IF)
LO = Tx Freq. - 1182.5 MHz
C
-Band Upconverter (140
MHz IF)
LO = Tx Freq. - 1252.5 MHz
C-Band Upconverter
Extended (70 MHz IF)
LO = Tx Freq. - 1182.5 MHz
C-Band Upconverter
Extended (140 MHz IF)
LO = Tx Freq. - 1365.0 MHz
Ku
-Band Upconverter (70
MHz IF)
LO = Tx Freq. – 1770.0 MHz
Ku-Band Upconverter
(140 MHz IF)
LO = Tx Freq. – 1840.0 MHz
The RF Monitor output can be measured with a frequency
counter of known calibration.
The stability of the 10 MHz Reference is related to the
temperature of a 10 MHz crystal inside the unit. A
proportionally controlled oven around the crystal maintains
the temperature in the oven to 0.1°C. In addition, the
precise temperature that the oven maintains has been
determined empirically for each crystal during
manufacturing. As long as the ambient temperature stays
within limits (0 - 50°C) the reference will maintain stability
of greater than 1 x 10
-8
(refer to Figure 4-2).
Figure 4-2. Typical Reference Aging vs. Time