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188) VNA Signal Standard (lower byte)
189-314) Not Used
315-1354)Sweep Data (130 points * 8 bytes/point= 1040 bytes)
315-2386)(259 points * 8 bytes/point= 2072 bytes)
315-4450)(517 points * 8 bytes/point= 4136 bytes)
8 bytes for each data point
1. Gamma
224
(highest byte)
2. Gamma
3. Gamma
4. Gamma (lowest byte)
5. Phase
225
(highest byte)
6. Phase
7. Phase
8. Phase (lowest byte)
Notes:
return loss = - 20* ( log(Gamma) / log(10) )
VSWR = (1+Gamma)/(1-Gamma)
Phase compares the reflected to the incident (reference)
For Spectrum Analyzer and Transmision Measurement (Option 21) Modes:
44) Start Frequency
226
(highest byte)
45) Start Frequency
46) Start Frequency
47) Start Frequency (lowest byte)
48) Stop Frequency
227
(highest byte)
49) Stop Frequency
50) Stop Frequency
51) Stop Frequency (lowest byte)
52) Center Frequency
228
(highest byte)
53) Center Frequency
54) Center Frequency
55) Center Frequency (lowest byte)
56) Frequency Span
229
(highest byte)
57) Frequency Span
58) Frequency Span
59) Frequency Span (lowest byte)
60) Ref Level
230
(highest byte)
61) Ref Level
62) Ref Level
63) Ref Level (lowest byte)
64) Scale per div
231
(highest byte)
65) Scale per div
Site Master PM 65
224 Gamma uses units scaled to 1/10,000
225 Phase is transmitted in 1/10ths of a degree
226 Scaled by Frequency Scale Factor (bytes 318-319)
227 Scaled by Frequency Scale Factor (bytes 318-319)
228 Scaled by Frequency Scale Factor (bytes 318-319)
229 Scaled by Frequency Scale Factor (bytes 318-319)
230 Value sent as (value in dBm * 1000) + 270,000
231 Value sent as (value * 1000)