Phasing the dipoles

19sep16
creating circular polarization
measuring circular phases
    5Mhz phase: mesh at 5 Mhz reference position
    8Mhz phase: mesh at 5 Mhz reference position
    8Mhz phase: mesh 15 cable feet down from 5 Mhz reference position.
measuring the linear phase
    8Mhz phase: mesh at 15 cable feed down from 5 Mhz Ref position
using the idl hfphase program.

other pages:

10apr15: final shorted measurements of cables (.txt)(dana)
151102: 5 mhz  phase, amplitude values to use for both pols at full power.
19sep16: phasing the 8.175 tx to give circular polarization (.pdf) (dana)
19sep16: dana's new plot of phasing the 5 mhz tx. (.pdf)
20sep16: measuring the phase for lcp,rcp at 8 mhz

Creating circular polarization.

     We want to transmit rcp (right circular polarization) for the hf campaigns (this is the ieee definition where the right hand rule is used as seen from the source.. thumb pointing in the direction of propagation of the wave).

    When phasing the dipoles there are a number of things to keep in mind:

 The tables below summarizes the measurements for the 5 and 8 mhz systems

5 Mhz phase calibration (02nov11)





lcp on sky
rcp on sky
tx #
cable
lambdas
phCor1
 (1*)
phCor2
 (2*)
phCor3
(3*)
 std
val (4*)  
phaseGen
InitVal
Phase
used
final
meas
amp
dbf
std
val(4*)
phaseGen
 InitVal
phase
used
final
meas
amp
dbf















1tang
6.5 180
0
0
90 270
287.7 269.5
-7.0
-90
90
106
91.8
-6.7
2 radial
6.5 0
0 0
0 0
0 0
-6.5
0
0
0
0
-7
3 tang
6.5 180
0 0
-150
30
48 29.9
-3.7
-210
330
345.5
329.7
-4.9
4 radial
7.0 180 180 180
-240
300
292 300.6
-5.5
-120
60
57
62 -6.4
5 tang
8.0 180 180 0
-30
330
16 330.3
-2.3
-330
30
72.5
29.8 -2.0
6 radial
8.0 180 180 180
-120
60
60 60.1
-5.0
-240
300
297
299.5 -5.7



8 Mhz phase calibration (20sep16)






















lcp on sky
rcp on sky

















tx # cable
lambdas
phCor1
  (1*)
phCor2
 (2*)
phCor3
(3*)
std
val (4*)
phaseGen
InitVal (5*)
phase
used
final
meas
amp
dbf
txPwr
KW
std
val (1*)
phaseGen
InitVal
phase
used
final
meas
amp
dbf
txPwr
KW

















1 radial
10
180
0
180
-240
120
123.4
119.95
-5.9
91
-120
240
242.7
241.1
-5.9
76
2 tang 10 180
0
0 -150
30
2.5
30.03
-6.5
79
-210
330
283.7
329.0
-6.5
72
3 radial 11.5
180
180
180 -120
60
41.3
59.9
-5.1
81
-240
300
268
300.1
-5.1
87
4 tang 11.5
180
180
0 -30
330




-330
30




5 radial 11
0
0
0
0
0
0
0
-2.4
81
0
0
0
0
-2.4
81
6 tang 11
180
0
0 90
270
250.7
269.6
-3.7
71
-90
90
67.6
89.95
-3.7
71



8 Mhz phase calibration (10 feet down from 5MHZ reference)

lcp on sky
rcp on sky

tx # required
phase
phase
used
final
meas
amp
dbf
txPwr
KW
required
phase
phase
used
final
meas
amp
dbf
txPwr
KW
date
done












1 radial
120
126.4
120
-6.9
52
240
243.7
239.8
-6.9
47
161012
2 tang 30
354
30.1
-7.5
52
330
282.7
330.1
-7.5
45
161012
3 radial 60
42.6
60.0
-7.1
52
300
268.0
300.0
-7.1
50
161012
4 tang 330
318.5
330.0
-4.1
38
30
7.2
30.2
-4.0
40
161012
5 radial 0
0
0
-3.4
38
0
0
0
-3.4
44
161012
6 tang 270
249.2
270.0
-2.7
56
90
56.5
90.0
-2.7
41
161012

Note:12oct16: we also generated a file for 15 feet down. It has the same phases as 10feet down, but we increased the drives as high as we could go.

Creating linear polarization.

    Frank and herb wanted to transmit linear polarization  using 8mhz.. On 17mar17 we measured the phases needed to transmit linear polarization.

The 8 mhz measurements used:

processing: x101/170317/franklin.pro, x101/Y15/150325/hfphase.pro


Using the hfphase idl program

    I wrote a short idl program to plot the output Efield of the 6 dipoles given various phase offsets.

How the program works:

    Running the program will generate the Efield of each tower, and a circle of radius 3 (def for amp=[1,1,1]) with a white vector sweeping around at 10sec/rotation.
The plotted symbols are:

Running the program:

5mhz
tower Order
txOrder
posAngDeg
xPh
yPh
rcpRot
lcpAct
T1,T5,T3
(1,2),(5,6),(3,4)
[0,120,240]
yPh + 90
-[0,120,240]
lcpRot
rcpAct
T1,T3,T5
(1,2),(3,4),(5,6)
-[0,120,240]
yPh - 90
-[0,120,240]
8Mhz





rcpRot
lcpAct
T6,T4,T2
(5,6),(3,4),(1,2)
[0,120,240]
yPh + 90
-[0,120,240]
lcpRot
rcpAct
T6,T2,T4
(5,6),(1,2),(3,4)
-[0,120,240]
yPh - 90
-[0,120,240]


processing: x101/150325/hfphase.pro,plot1.pro






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