ILS and VOR ground measurement guide
This guide is for airport and ANSP navaid technicians. It explains what ground measurements on ILS, VOR and GBAS stations check and which instrument features matter, citing Rohde & Schwarz documentation.
What is measured
- ILS: modulation depth, DDM and SDM on localizer and glide path [1].
- VOR: bearing and modulation, plus AM distortion for Doppler VOR [1].
- GBAS: content of the eight VDB timeslots [2].
Reference documents
- ICAO Annex 10 and ICAO Doc 8071 define the signals and test methods [3].
Instrument features
- Frequency coverage 70–410 MHz and >130 dB dynamic range on the EVSG1000 [1].
- Simultaneous course and clearance on two-frequency ILS [3].
- Data recording and GPS support for documented measurements [4].
Products referenced in this guide
Rohde & SchwarzTCAS / DME / VOR / ILS Test EquipmentRFQ
Rohde & Schwarz R&S EVSG1000 VHF/UHF Airnav/Com Analyzer
Model: R&S EVSG1000
- Measurements in line with ICAO Doc 8071 and Annex 10
- Simultaneous course/clearance analysis on 2F ILS
- Up to 100 data records per second in high measurement rate mode
- GBAS/SCAT-I timeslot decoding with PPS sync
Status: Request a quote · calibration certificate on request
Related category
TCAS / DME / VOR / ILS Test Equipment · All aviation guides
Frequently asked questions
Is a separate instrument used for flight inspection?
Rohde & Schwarz offers the EVSF1000 for flight inspection [2].
Which option adds GBAS?
R&S EVSG-K4 [4].
This guide is general information. It does not replace the aircraft maintenance manual, the operator's approved procedures or the rules of the competent civil aviation authority.
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