Campbell TGT1, Operator'S Manual

Page: 44 / 64

Appendix D. Detailed Forward/Reflected Power Information
D-2
Table D.2-1. P
out
Values
FWD P
out
(dBm)
110 +35.9
130 +37.2
150 +38.3
165 +39.0
175 +39.5
185 +39.9
195 +40.4
205 +40.8
215 +41.1
230 +41.7
250 +42.4
D.3 Impedance Match Datalogger Program
D.3.1 CR10X and CR10
This example calculates the percent of power reflected and the amount of
power going out to the transmitter if the percent of power reflected is less than
5.
;
*Table 1 Program
01: 10.0 Execution Interval (seconds)
;USER DEFINED PROGRAM
;Calculate the percent of power reflected with this equation: % power reflected = [((ref +17.4)/(fwd
+ 17.4))^2 x 100] -1
01: Z=X+F (P34)
1: 5 X Loc [ RefPwr ]
2: 17.4 F
3: 8 Z Loc [ RefPlus ]
02: Z=X+F (P34)
1: 4 X Loc [ FwdPwr ]
2: 17.4 F
3: 9 Z Loc [ FwdPlus ]
03: Z=X/Y (P38)
1: 8 X Loc [ RefPlus ]
2: 9 Y Loc [ FwdPlus ]
3: 10 Z Loc [ Scratch1 ]
04: Z=X*Y (P36)
1: 10 X Loc [ Scratch1 ]
2: 10 Y Loc [ Scratch1 ]
3: 10 Z Loc [ Scratch1 ]