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9.0 Radio Communications family<br />

9.1 Transmitter PDU<br />

9.1.1 Modulation Type record<br />

9.1.1.1 Spread Spectrum<br />

547<br />

Section 9<br />

Radio Communications family<br />

This section specifies the 16-bit Boolean array <strong>for</strong> the Spread-Spectrum field in the Modulation-<br />

Type record of the Transmitter PDU.<br />

All bits set to zero indicates that spread-spectrum modulation is not in use. Individual bits set to<br />

one indicate the use of spread spectrum as follows:<br />

Bit # Spread Spectrum Modulation Type<br />

0 Frequency Hopping<br />

1 Pseudo-noise<br />

2 Time Hopping<br />

3-15 TBD<br />

More than one bit set to one indicates that distinct methods are simultaneously in use.<br />

9.1.1.2 Major Modulation<br />

This section specifies the 16-bit enumeration <strong>for</strong> the Major-Modulation field in the Modulation-Type<br />

record of the Transmitter PDU.<br />

9.1.1.3 Detail<br />

Field Value Radio Major Modulation<br />

0 Other<br />

1 Amplitude<br />

2 Amplitude <strong>and</strong> Angle<br />

3 Angle<br />

4 Combination<br />

5 Pulse<br />

6 Unmodulated<br />

7 Carrier Phase Shift Modulation (CPSM)<br />

This section defines the 16-bit enumerations <strong>for</strong> the Detail field in the Transmitter PDU.<br />

9.1.1.3.1 Detailed modulation <strong>for</strong> amplitude modulation<br />

Detailed modulation types <strong>for</strong> Amplitude Modulation are defined as follows:<br />

Field Value Detailed Modulation <strong>for</strong> Amplitude<br />

0 Other<br />

1 AFSK (Audio Frequency Shift Keying)<br />

2 AM (Amplitude Modulation)<br />

3 CW (Continuous Wave Modulation)<br />

4 DSB (Double Sideb<strong>and</strong>)

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