Operating environment

The USO meets all electrical specifications in a vacuum environment.

Output frequency

76.364198 to 76.783951 MHz for 35 downlink channels

Frequency step size

12.346 kHz

Frequency setting accuracy

+/-1 x 10^-8

Number of RF outputs

Two

Output RF power level

+7 +/- 1 dBm from each output port

Aging rate

< 1 x 10^-10 per 24 hrs (spec after 72 hours)
< 1 x 10^-11 per 24 hrs (spec after 30 days)

Allan deviation

< 3.0 x 10^-13 at t = 1 sec.
< 1.5 x 10^-13 at t = 10 sec.
< 5.0 x 10^-13 at t = 100 sec.

Single sideband phase noise

any channel

< - 95 dBc/Hz at 1 Hz
< -110 dBc/Hz at 10 Hz
< -120 dBc/Hz at 100 Hz
< -125 dBc/Hz at 1 KHz
< -125 dBc/Hz at > 10 KHz

Frequency: function of temperature

< 1 x 10^-12 per degree C

Frequency: function of load

< 2 x 10^-12 over 45 to 55 ohms load

Frequency: function of line voltage

< 1 x 10^-12 over 22 to 35 volts line

Harmonics

< -40 dBc

Spurious

< -60 dBc

Input DC voltage

+28 +7/-6 VDC

Input DC power

< 0.8 W steady-state
< 4.0 W turn-on

Mass

< 600 grams

Input power connector

Subminiature D-type (high density 15 pin)

Output RF connectors

SMA

Temperature conditions

20^o to +40^oC (operating within spec.)
-25^o to +65^oC (operating survival range)

Telemetry outputs

Regulator voltage (0 to 5 volts)
Converter voltage (0 to 5 volts)
Temperature (Minco S100480PFY72B)

Mechanical Shock and Vibration

3 repetitive shocks 100 G’s, 2 mSec each axis.
Sine in thrust axis: 18 g’s 20 to 22 Hz
Sine in lateral axis: 12 g’s 17 to 19 Hz
Random all axes:10.4 Grms 20 to 2000 Hz

Electromagnetic Compatibility

EMI requirements of CE-01, 03, 07
CS-01, 02, 06 RE-01, 02 RS-03
Transient survival +56 to -2 Vdc, <10 uSec