Modulated Rf Power Spectrum; Table 19: K And M Values Per Waveform - Quasonix TIMTER QSX-V Series Installation And Operation Manual

6.7 Modulated RF Power Spectrum

The transmitter's modulated spectrum complies with the IRIG-106 PSD mask:
M (dBc) = Max ( {K – 100 log |f – f
M = power relative to unmodulated carrier (i.e., units of dBc) at frequency f (MHz)
f = frequency in MHz
f = the carrier frequency in MHz
c
R = the bit rate in Mb/s
P = the rated power output of the UUT, in Watts
and the values of K and m are as tabulated in Table 19.
As noted in the equation above, the mask has a floor at –(55 + 10 log(P)) dBc, and the mask imposes no limit on the
spectrum for frequency offsets less than R/m. Representative examples of the transmitted spectrum, with the
appropriate mask, are shown in Figure 24, Figure 25, and Figure 26.
82 Quasonix, Inc.
TIMTER™ Multi-mode Digital Telemetry Transmitter
| + 90 log (R)}, {-(55 + 10 log (P))} ), |f – f
c

Table 19: K and m Values per Waveform

PCM/FM, Tier 0
SOQPSK TG, Tier I
MULTI-h CPM, Tier II
| ≥ R/m where
c
K m
-28 2
-61 4
-73 4