.
Azimuth Path Following Noise (PFN)

.
Azimuth Control Motion Noise (CMN)

.
Azimuth Mean Course Error (MCE)

.
Azimuth Field strength

.
Elevation PFE

.
Elevation PFN

.
Elevation CMN

.
Elevation Mean Glidepath Error (MGE)

.
Elevation Field strength.

6.2.2  It shall be possible to annotate the recordings with comments and any other necessary information at the time of making the recording (1589).
6.2.3  The minimum data sampling rate shall be 5 Hz (1590).
6.2.4  The filters used for measurement of PFE, PFN and CMN shall be designed using guidance given in ICAO Annex 10, Volume 1, Attachment G, figure G11 (1591). The filter design shall be compatible with the digital data sampling rate (1592).
7  Measurement Uncertainty
7.1  Maximum permitted measurement uncertainty at 95% confidence level
Azimuth
PFE 0.8 metres at reference datum
PFN 0.7 metres at reference datum
CMN 0.6 metres at reference datum

At all other places where these parameters are measured, the uncertainty shall not exceed 0.02°
Field strength (Relative) 2dB
Elevation 
PFE 0.2 metres at reference datum PFN 0.1 metres CMN 0.1 metres At all other places where these parameters are measured, the uncertainty shall not
exceed 0.01° Field strength (Relative) 2dB NOTE: The figure of 2dB for field strength is the permitted uncertainty for
repeatability of measurement. It is not a requirement for absolute field strength measurement.
7.1.1  Associated DME (1597) Field strength (relative) 2dB Distance 60 metres at threshold and point A
13  Records and Graphs
Where chart recordings are used for parameter evaluation, they shall have sufficient resolution for this purpose.
Annex 4 - VHF Omnidirectional Radio Range
6  Equipment 
6.1 6.1.1 6.1.2 6.1.3  Measurement and Recording Equipment The VOR inspection system shall be capable of measuring and recording the following parameters: a) Alignment Accuracy (1944); b) Field strength (1945); c) 30Hz Modulation depth (1946); and d) 9960Hz Modulation depth (1947). It shall be possible to annotate the recordings with comments and any other necessary information at the time of making the recording (1948). During orbital flights the system shall be capable of measuring and recording every 5 degrees (1949). 
7  Measurement Uncertainty 
7.1  Maximum permitted measurement uncertainty at 95% confidence level is given below: 

Parameter  Measurement Uncertainty 
Alignment  0.4° (1950) 
Field Strength  3dB (1951) 
Modulation 30Hz and 9960Hz  0.4% (1952) 

13  Records and Graphs
13.1  Where chart recordings are used for parameter evaluation, they shall have sufficient resolution for this purpose (1953).
13.2  Records and graphs must be annotated to show the position of the aircraft at the time of making the measurement (1954).
Annex 5 - Non-Directional Beacon (NDB)
6  Equipment 
6.1 6.1.1 6.1.2 6.1.3  Measurement and Recording Equipment The NDB inspection system shall be capable of measuring and recording the following parameters: a) Accuracy (2139); b) Field strength (2140). It shall be possible to annotate the recordings with comments and any other necessary information at the time of making the recording. (2141) During orbital flights the system shall be capable of measuring and recording every 5 degrees. (2142) 
7  Measurement Uncertainty 
7.1  Maximum permitted measurement uncertainty at 95% confidence level is given below: 
　
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