Editing SimTX API/Packets/TransmitterStart (section)

== Fields ==
{| class="wikitable"
! # !! Field !! Type !! Description
|-
| 1 || <code>site</code> || [[SimTX API/Data types#SessionSite|SessionSite]] || Where the transmitter is: a [[SimTX API/Data types#StationBinding|StationBinding]] (normal) or an [[SimTX API/Data types#AdhocStation|AdhocStation]] (only with <code>tx.adhoc</code> or when the server policy allows it). Exactly one member must be set.
|-
| 3 || <code>modulation</code> || <code>string</code> || [[SimTX API/Data types#Modulation|Modulation]] name, for example <code>USB</code>.
|-
| 4 || <code>frequency_hz</code> || <code>double</code> || Carrier or dial frequency in Hz, finite and > 0. Values above 3 GHz are reduced to 3 GHz.
|-
| 5 || <code>power_watts</code> || <code>float</code> || Transmitter power in watts, finite and ≥ 0. Reduced to at most 1,000,000 W and then to the PA cap (the bound rig's cap, else the account's <code>tx.pa_limit</code>).
|-
| 6 || <code>source_type</code> || <code>string</code> || [[SimTX API/Data types#Source type|Source type]] name, for example <code>AUDIO_STREAM</code>.
|-
| 7 || <code>sample_rate</code> || <code>int32</code> || Rate of the samples the client will send, > 0.
|-
| 8 || <code>audio_gain</code> || <code>float</code> || Gain applied to the client's samples, finite and ≥ 0. Values above 100 are reduced to 100.
|-
| 9 || <code>bandwidth_hz</code> || <code>float</code> || Transmitted bandwidth in Hz, finite and > 0. Values above 10 MHz are reduced to 10 MHz.
|-
| 10 || <code>audio_low_cut_hz</code> || <code>float</code> || Audio high-pass corner in Hz, finite and ≥ 0.
|-
| 11 || <code>tone_hz</code> || <code>float</code> || Tone frequency for CW and tone sources, Hz, ≥ 0. Send 0 when unused.
|-
| 12 || <code>duty_cycle</code> || <code>float</code> || Duty cycle of generated sources, 0 to 1. Send 1 when unused.
|-
| 13 || <code>imperfections</code> || [[SimTX API/Data types#TxImperfections|TxImperfections]] || Transmitter imperfection knobs. Unset knobs take the rig's value, or the generic HF preset without a rig. With a rig, only <code>final_drive_db</code>, <code>audio_compression_db</code>, <code>frequency_offset_hz</code> and <code>am_modulation_index</code> are taken from here.
|-
| 14 || <code>tracking</code> || [[SimTX API/Data types#Tracking|Tracking]] || Track a target from the start. See [[SimTX API/Tracking and pointing|Tracking and pointing]].
|-
| 15 || <code>aim</code> || [[SimTX API/Data types#AntennaAim|AntennaAim]] || Where the antenna points when the session starts. Unset: the antenna's stored heading. See [[SimTX API/Tracking and pointing#Start pointing|Start pointing]].
|}

Field number 2 is reserved; do not use it.