Editing SimTX API/Limits and errors (section)

== Rate and size limits ==
{| class="wikitable"
! What !! Limit
|-
| Control requests || 20/s per address (burst 40), heavy 4/s (burst 12); server-wide 200/s and 40/s. See [[SimTX API/Control session#Rate limits|Control session]].
|-
| Transmitter input || 1.05 × the declared rate after a burst of about 2 s; excess blocks are discarded.
|-
| TxUpdate || One applied update per 250 ms; frequency once per second.
|-
| Wideband reception || 32 million samples per second per address, plus a server-wide budget.
|-
| Frame || At most 16 MiB; the hello at most 64 KiB.
|-
| Frame shape || At most 16,384 (client frames) or 2,097,152 (server frames) nested messages, repeated string, bytes and message elements, and unknown fields; nesting at most 32 deep. See [[SimTX API/Framing#Size and shape limits|Framing]].
|-
| SampleBlock || At most 65,536 values.
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| NEC deck || At most 262,144 bytes.
|-
| Callsign || 1 to 64 printable characters.
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| Ephemeris || At most 3,600 samples per request.
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| Pass prediction || A window of at most 7 days.
|-
| Coverage map || 4 to 72 columns, 2 to 36 rows.
|}