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Signal Finder / Satfinder: fields and buttons

Menu → Setup → Tuners, Scanning & Reception → Signal Finder. The extension is technically named Satfinder, but the reviewed revision also supports suitable DVB-C, DVB-T/T2 and ATSC frontends. It combines transponder selection with regularly updated signal readings.

Signal Finder with measurement fields and manual transponder parameters
Native form without tuning during capture: N/A means no measurement here. The image specifies neither a target level nor a reception fault in the installation. Open original image ↗

Operation

Section titled “Operation”
  1. Select the connected tuner. On a hybrid frontend choose only a supported, configured reception type.
  2. Choose User defined/Single transponder for manual parameters or Predefined transponder for a list entry.
  3. For satellite, select the position, then choose or enter the reference transponder.
  4. Wait for stable readings after a change. In normal use, Signal Finder tunes the frontend to these parameters.
  5. OK or Green/Scan starts a service scan on the selected carrier; it is not a harmless confirmation. Use EXIT/Close to return.

Available parameters

Section titled “Available parameters”
Reception type Fields
Satellite System, satellite, frequency, inversion, symbol rate, polarisation, FEC, S2 modulation, roll-off, pilot; supported MIS/IS ID, PLS mode/code and T2MI PLP/PID
Cable Frequency, symbol rate, modulation, FEC and inversion or predefined transponder
DVB-T/T2 Frequency or channel, region/transponder, system, bandwidth, modulation, code rates, transmission mode, guard interval, hierarchy, T2 PLP ID
ATSC System, frequency, inversion, modulation or predefined entry

See the scan field reference for each parameter. Signal Finder limits scan type to single or predefined transponder. It removes the normal Network scan, Clear and Only free form rows; its initial purpose is tuning and measurement.

Interpret the readings

Section titled “Interpret the readings”

Lock/Signal confirms synchronisation. SNR, AGC and BER depend on driver data; not every receiver supplies every value. Signal diagnosis explains readings and common faults. Higher AGC alone does not prove better quality.

Signal Finder can interrupt live TV and request a free tuner. Selecting another satellite on a motorised installation can move the dish. Account for active recordings when tuners are occupied. This tool cannot remotely correct mechanical alignment and does not replace suitable installation measurement equipment.

Source revision: OpenATV plugin.py.