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Table 5-11. TDRSS MA Return Service Customer Platform Signal Constraints
(cont’d)
AM/PM (cont’d):
Parameters (Notes 1, 2, and 13) Description (Notes 1, 2, and 13)
DG2 (applicable to SMA only)
Baud rate per channel < 1.024 Msps < 15 degrees/dB
Baud rate per channel > 1.024 Msps < 12 degrees/dB
Noncoherent frequency stability (peak) (Notes 4, 5, 10)
+700 Hz customer oscillator frequency uncertainty
1-sec average time < 3 x 10 -9
5-hr observation time < 1 x 10 -7
48-hr observation time < 3 x 10 -7
+ 3 kHz customer oscillator frequency uncertainty
1-sec average time 3 x 10 -9
5-hr observation time 4.3 x 10 -7
48-hr observation time 1.29 x 10 -6
+ 35 kHz customer oscillator frequency uncertainty
1-sec average time
Baud rate per channel < 12.5 ksps < 7.37 x 10 -9
Baud rate per channel > 12.5 ksps < 26 x 10 -9
5-hr observation time < 3.77 x 10 -6
48-hr observation time < 11.3 x 10 -6
Incidental AM (peak):
At frequencies >10 Hz for data rates 100 Hz for data rates 1 kbps
Spurious PM (rms)
< 5 percent
DG1 < 2 degrees
DG2 (applicable to SMA only)
BPSK < 2 degrees
QPSK
I/Q = 4:1 < 2 degrees
I/Q = 1:1 < 1 degree
Revision 10 5-38 450-SNUG