SPECIAL FEATURES
• Excellent Long Term Stability: ± 8 ppm over 18 years
• Good Temperature Stability: ± 0.8 ppm per any + 25 °C
• IF & RF Outputs: UHF & S-Band
• Fully Redundant OCXO Function
• Low Power Consumption: < 2 watts
This integrated assembly is used as a source in space-
borne Beacon Transmitters. The unit first generates a
UHF signal which is processed at the system level and
then fed back into a second port where it is multiplied
to the final C-Band frequency.
The stable signal is derived from one of two switched
SC-cut OCXOs for superior reliability. The transistor
type multiplier section includes a combination of
lumped element and combline filters.
ELECTRICAL SPECIFICATIONS
RF Output
Operating Frequency: 4 GHz
Long Term Stability: ± 8 ppm/18 yr life
Temperature Stability: < ± 0.8 ppm over any 25 °C variation
Power Level: + 4 dBm, nominal
Power Variation: ± 0.8 dB, maximum
Output VSWR: 1.68:1, maximum
Spurious: - 65 dBc, nominal
Harmonics: - 65 dBc, nominal
SSB Phase Noise (dBc/Hz, typical):
offset
10 Hz - 50
1 kHz - 110
10 kHz - 120
1 MHz - 124
DC Power:
Surge + 9 ± 0.75 V @ 330 mA, nominal
Steady State (Vacuum) + 9 ± 0.75 V @ 220 mA, nominal
Specifications subject to change without notice.
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature: - 20 to + 75 °C, baseplate
Environment: Space
MECHANICAL SPECIFICATIONS
Size (excluding connectors): 4 x 3.6 x .88 inches
102 x 91 x 22 mm
Weight: 12.5 oz (354 g), nominal
RF Connectors: SMA-Female, Removable
DC Connector: DC Feedthroughs
S-LEVEL BEACON TRANSMITTER SOURCE 27
X NX M 4 GHz
UHF’UHF
OCXO "1"
OCXO "2"
OSC
SELECT
CONTROL
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