Phasing the dipoles

updated 22may19
creating circular polarization
measuring circular phases
   
creating linear phase
    8Mhz phase: phase values used for 2015 run..
    8mhz phase: phase values giving larger amplitude  polarized signal.

Phasing the nrl signal generator.

using the idl hfplotsignal 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


Setup to measure the phase

    We use the fieldfox (FF) in vector voltmeter mode to do the the test

5 MHz phase

    There are two sets of calibration data for 5MHz:

    Phase correction Notes:




5  MHz calibration after 31oct18

5MHz RCP phase calibration (After 31oct18)
transmitter
1
2
3
4
5
6
rad or tangential
t,x
r,y
t,x
r,y
t,x
r,y
tower
1a
1b
3a
3b
5a
5b
initial phase (as lead) (deg)
0
-90
-240
-330
-120
-210
initial phase  (as lag) (deg) (1*)
0
90
240
330
120
210

lambda/2 heliax correction (2*)
0
0
0
180
180
180
radial fed to inward pointing dipole (3*)
0
180
0
180
0
180  
req Phase at output
0
270
240
330
300
210
req phase using tx 2 as reference
90
0
330
60
30
300
phase used.
114
0
346.5
63
86
313
output phase measured
90
0
330
60
30
300


5MHz LCP phase calibration (after 31oct18)
transmitter
1
2
3
4
5
6
rad or tangential
t,x
r,y
t,x
r,y
t,x
r,y
tower
1a
1b
3a
3b
5a
5b
initial phase (as lead) (deg)
0
90
240
330
120
210
initial phase  (as lag) (deg) (1*)
0
-90
-240
-330
-120
-210
lambda/2 heliax correction (2*)
0
0
0
180
180
180
radial fed to inward pointing dipole (3*)
0
180
0
180
0
180  
req Phase at output
0
90
120
30
60
150
req phase using tx 2 as reference
270
0
30
300
330
60
phase used.
300
0
56
301
21
81
output phase measured
279
0
30
300
330
60


5 MHz calibration 02nov11 to 31oct18

                                  Old
5MHz RCP phase calibration (02nov11 to 31oct18)
transmitter
1
2
3
4
5
6
rad or tangential
t,x
r,y
t,x
r,y
t,x
r,y
tower
1a
1b
3a
3b
5a
5b
initial phase (as lead) (deg)
0
-90
-240
-330
-120
-210
initial phase  (as lag) (deg) (1*)
0
90
240
330
120
210
lambda/2 heliax correction (2*)
0
0
0
180
180
180
radial fed to inward pointing dipole (3*)
0
180
0
180
0
180  
req Phase at output
0
270
240
330
300
210
req phase using tx 2 as reference
90
0
330
60
30
300
phase used.
106
0
345.5
57
72.5
297
output phase measured
91.8
0
329.7
62
29.8
299.5

                                      Old
5MHz LCP phase calibration (02nov11 to 31oct18)
transmitter
1
2
3
4
5
6
rad or tangential
t,x
r,y
t,x
r,y
t,x
r,y
tower
1a
1b
3a
3b
5a
5b
initial phase (as lead) (deg)
0
90
240
330
120
210
initial phase  (as lag) (deg) (1*)
0
-90
-240
-330
-120
-210
lambda/2 heliax correction (2*)
0
0
0
180
180
180
radial fed to inward pointing dipole (3*)
0
180
0
180
0
180  
req Phase at output
0
90
120
30
60
150
req phase using tx 2 as reference
270
0
30
300
330
60
phase used.
287.7
0
48
292
16
60
output phase measured
269.5
0
29.9
300.6
330.3
60.1


8 Mhz phase (10 feet down from 5 MHz mesh position)

Notes:

8 MHz calibration (after 31oct18)


8MHz RCP phase calibration (after 31oct18)
transmitter
1
2
3
4
5
6
radial or tangential
r,y
t,x
r,y
t,x
r,y
t,x
tower
2a
2b
4a
4b
6a
6b
initial phase (as lead) (deg)
0
90
120
210
240
330
initial phase  (as lag) (deg) (1*)
0
-90
-120
-210
-240
-330
lambda/2 heliax correction (2*)
0
0
180
180
0
0
radial fed to inward pointing dipole (3*)
180
0
180
0
180
0
req Phase at output
180
270
240
330
300
30
req phase using tx 5 as reference
240
330
300
30
0
90
phase used.
238
298
275
15
0
66.5
output phase measured
240
330.5
300
30
0
90


8MHz LCP phase calibration (after 31oct18)
transmitter
1
2
3
4
5
6
radial or tangential
r,y
t,x
r,y
t,x
r,y
t,x
tower
2a
2b
4a
4b
6a
6b
initial phase (as lead) (deg)
0
-90
-120
-210
-240
-330
initial phase  (as lag) (deg) (1*)
0
90
120
210
240
330
lambda/2 heliax correction (2*)
0
0
180
180
0
0
radial fed to inward pointing dipole (3*)
180
0
180
0
180
0  
req Phase at output
180
90
120
30
60
330
req phase using tx 2 as reference
120
30
60
330
0
270
phase used.
111
358
36
313
0
250.8
output phase measured
120
30
60
330
0
270


8 MHz calibration  (oct16 - 31oct18)

                                                        Old
8MHz RCP phase calibration (oct16 - 31oct18)
transmitter
1
2
3
4
5
6
radial or tangential
r,y
t,x
r,y
t,x
r,y
t,x
tower
2a
2b
4a
4b
6a
6b
initial phase (as lead) (deg)
0
90
120
210
240
330
initial phase  (as lag) (deg) (1*)
0
-90
-120
-210
-240
-330
lambda/2 heliax correction (2*)
0
0
180
180
0
0
radial fed to inward pointing dipole (3*)
180
0
180
0
180
0
req Phase at output
180
270
240
330
300
30
req phase using tx 5 as reference
240
330
300
30
0
90
phase used.
243.7
282.7
268.0
7.2
0
56.5
output phase measured
239.8
330.1
300.0
30.2
0
90.0

                                                         Old
8MHz LCP phase calibration (oct16 - 31oct18)
transmitter
1
2
3
4
5
6
radial or tangential
r,y
t,x
r,y
t,x
r,y
t,x
tower
2a
2b
4a
4b
6a
6b
initial phase (as lead) (deg)
0
-90
-120
-210
-240
-330
initial phase  (as lag) (deg) (1*)
0
90
120
210
240
330
lambda/2 heliax correction (2*)
0
0
180
180
0
0
radial fed to inward pointing dipole (3*)
180
0
180
0
180
0  
req Phase at output
180
90
120
30
60
330
req phase using tx 2 as reference
120
30
60
330
0
270
phase used.
126.4
354.0
42.6
318.5
0
249.2
output phase measured
120
30.1
60.0
330.0
0
270.0


Creating linear polarization.

15may19:

    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
                   redid computations more legibly 21may19 .. x101/hf/plotphase/linphase.pro


8 Mhz phases to give a larger linear pol amplitude (relative ampl. of 3.65)
transmitter
1
2
3
4
5
6
rad or tangential
r,y
t,x
r,y
t,x
r,y
t,x
tower
2a
2b
4a
4b
6a
6b
initial phase (deg)
0
0
312.
192.
192
312
lead to lag for siggen 0
0
-624
-384
-384
-624
lambda/2 heliax
correction
0
0
180
180
0
0
radial fed to inward pointing
dipole
180
0
180
0
180
0  
req Phase at output
180
0
48
-12
-12
-312
req phase using tx 5 as reference
192
12
60
0
0
60
phase used.



ref
ref

output phase measured (not yet..)







processing: x101/hf/plotphase/linphase.pro

Phasing the nrl siggen

    The nrl siggen: when you put in 90 degrees, that goes in as wt+phi.. (a lead.. rather than a lag of the older system)


NRL 5MHz RCP phase calibration (10jun19 with tx bug fixed)
transmitter
1
2
3
4
5
6
rad or tangential
t,x
r,y
t,x
r,y
t,x
r,y
tower
1a
1b
3a
3b
5a
5b
initial phase (as lead) (deg)
0
-90
-240
-330
-120
-210
initial phase  (as lead) (deg) (1*)
0
-90
-240
-330
-120
-210
lambda/2 heliax correction (2*)
0
0
0
180
180
180
radial fed to inward pointing dipole (3*)
0
180
0
180
0
180  
req Phase at output
0
90
-240
-330
60
-210
req phase using tx 2 as reference
270
0
30
300
330
60
phase used
258
0
13
303
292
57
output phase measured
270.7
0
29.5
299.9
329.3
60.1
output phase measured with old system
using A/B..
90
0
330
60
30
300

 
NRL 5MHz RCP phase calibration (used 10jun19 with bug)
transmitter
1
2
3
4
5
6
rad or tangential
t,x
r,y
t,x
r,y
t,x
r,y
tower
1a
1b
3a
3b
5a
5b
initial phase (as lead) (deg)
0
-90
-240
-330
-120
-210
initial phase  (as lead) (deg) (1*)
0
-90
-240
-330
-120
-210
lambda/2 heliax correction (2*)
0
0
0
180
180
180
radial fed to inward pointing dipole (3*)
0
180
0
180
0
180  
req Phase at output
0
90
-240
-330
120
-210
req phase using tx 2 as reference
270
0
30
300
30
60
phase used
258
0
13
303
348
57
output phase measured
270.7
0
29.5
299.9
30
60.1


NRL 5MHz LCP phase calibration (after 31oct18)
these stising_the_dipoles.html ll have the lags.. we need to redo it..
transmitter
1
2
3
4
5
6
rad or tangential
t,x
r,y
t,x
r,y
t,x
r,y
tower
1a
1b
3a
3b
5a
5b
initial phase (as lead) (deg)
0
90
240
330
120
210
initial phase  (as lead) (deg) (1*)
0
90
240
330
120
210
lambda/2 heliax correction (2*)
0
0
0
180
180
180
radial fed to inward pointing dipole (3*)
0
180
0
180
0
180  
req Phase at output
0
-90
240
330
-120
210
req phase using tx 2 as reference
90
0
330
60
330
300
phase used.
259
0
45
298
339.8
41
output phase measured
90.3
0
300.5
60.4
330.2
300.2


nrl 8 MHz calibration ()

For the calibration use vmm with B/A


8MHz RCP phase calibration (13jun19)
transmitter
1
2
3
4
5
6
radial or tangential
r,y
t,x
r,y
t,x
r,y
t,x
tower
2a
2b
4a
4b
6a
6b
initial phase (as lead) (deg)
0
90
120
210
240
330
initial phase  (as lag) (deg) (1*)
0
90
120
210
240
330
lambda/2 heliax correction (2*)
0
0
180
180
0
0
radial fed to inward pointing dipole (3*)
180
0
180
0
180
0
req Phase at output
180
90
120
30
60
330
req phase using tx 5 as reference
120
30
60
330
0
270
phase used.
126
64
91
341
0
298
output phase measured
119.5
30
60.8
-30.6
0
-90


8MHz LCP phase calibration (not yet measured)
transmitter
1
2
3
4
5
6
radial or tangential
r,y
t,x
r,y
t,x
r,y
t,x
tower
2a
2b
4a
4b
6a
6b
initial phase (as lead) (deg)
0
-90
-120
-210
-240
-330
initial phase  (as lag) (deg) (1*)
0
-90
-120
-210
-240
-330
lambda/2 heliax correction (2*)
0
0
180
180
0
0
radial fed to inward pointing dipole (3*)
180
0
180
0
180
0  
req Phase at output
180
270
240
330
300
30
req phase using tx 2 as reference
240
330
300
30
0
90
phase used.






output phase measured







Using the hfplotsignal  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,hfplotsignal.pro






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