• From : Mr. Primož G.
• To : Mr.Roman Dávid / roman.david@dxsatcs.com
• Sent : Wednesday, July 2, 2010 10:10 AM
• Subject : KU band LNB Norsat 4206 CF & difference in signal quality compared to the converter SMW WDL TYPE E
  
• State : Slovenia

.

• TEXT questions + TEST results nr.1 :

.
Hello Roman,

I've noticed that you use Norsat 4206 LNB recently. Could you tell what is difference in signal quality compared
to previous WDL digital you had for reference?
Secondary I managed to borrow SMW WDL Digital Type E, actualy it is SMW Quattro, as under plastic cover there
were 2x WDL digital + SMW OMT with golden ring and 90o smw elbow. Today I did quick test before i departed to
work on Channel Master 243 pointing at Thor 5, Transponder 11229 H - the weakest frequency here in south.

SMW Q-PLL (gain 56, noise 0.8 ).....................C/N = 11.9 dBi

SMW WDL (gain 52, noise 0.8 )........................C/N = 12.2 dBi

Invacom QDF-031 (gain 58, noise 0.3 )..........C/N = 12.5 dBi

Later on I will make photos and I prepare to publish comparison review on fringe satellite.

Kind Regards - Primož
.

• Photo annex from the author No.1 :   Norsat 4206 CF contra SMW WDL TYPE E
  

.
      SMW WDL Digital Type E: s/n=06100031 and Norsat 4206 CF: s/n=0802-N20074-309850    
                                                               click to enlarge                

.

• Answer to question nr. 1 :

.
Dear Mr. Primož ,
Glad to hear you again and thank you for By sending the results of quality measurement.

Here are the answers to your questions :

Norsat converter advantages compared to SMW WDL.
Measuring the quality of reception resulting from satellites Insat 4B at 93.5°E I carried on these two pieces :

  DRO-SMW WDL Digital Type E: s/n=06100031 ___ DRO Norsat 4206 CF: s/n=0802-N20074-309850

                  purchase price : 360 EUR                                              purchase price : 147 EUR
   

   a, greatly improved transmission characteristics in the range of frequency spectrum from 11 450 to 1 750 MHz.
Spectrum analysis has confirmed to me that  the converter SMW WDL processes these two carriers > C1=11 490 V
and C2=11 570 V with significant distorted in the course of the spectrum/distortion characteristics saddle.

   b, significantly less interference on the transmission carrier with the highest error rate BER.To the specific carrier
in the frequency range of satellite Insat 4B at 93.5°E > DD Direct+ networks 11 490 V + 11 570 V I measured
a significant decrease in error rate from level Ch BER=5>8 x 10-3 to a lower level Ch BER=3>6 x 10-4 ! If I had to make
the difference in unit-MER, then I have these two carrier with the highest error rate achieved an increase in the average
quality up to MER=2 dB.
.

• Photo annex from the author No.2 :  Insat 4B spectrum analysis of converters Norsat 4206 CF / SMW WDL E

.
Insat 4B at 93.5°E - Indian footprint : measurements taken in the town of Lučenec / central Slovakia  
                                     geographical location : Latitude: 48.33°  _   Longitude: 19.72°
                                 measurement results are derived from the 3.7 m diameter antenna
                                                                    elevation angle : 2.0°

   Norsat 4206 CF : complete range of vertical vector       SMW WDL Digital E : complete range of vertical vector
                         cable length is 40 m                                                           cable length is only 5 m

                                               SMW WDL Digital E : complete range of vertical vector
                                                                              cable length is 40 m
                             

.    c, significantly greater gain in measured amplitude signal :

indication on the label : SMW WDL Digital Type E: Gain=52 dB +/- 4 dB + Norsat 4206 CF: Gain=60+ dB
measurement results : WDL C1 at 11 675 MHz average POW-V level=400 uV > Norsat C1 at 11 675 MHz average POW-V
level=1200 uV.The length of the cable over 50 meters this is an important difference in the ratio .

   d, oscillator circuit and the dielectric resonator has a much higher qualitative factor :

DRO 1 > SMW WDL Digital Type E: LOF stability +/- 1.5 MHz/T
DRO 2 > Norsat 4206 CF: LOF stability +/- 250 kHz/T

These are just the basic differences
.

• Photo annex from the author No.3 :    Norsat 4206 CF contra SMW WDL TYPE E
  

.
   SMW WDL Digital Type E: s/n=06100031 and Norsat 4206 CF: s/n=0802-N20074-309850 


.

• TEXT questions No.2 :

Hello Roman,

Thank you very much for the new reference faktor of Norsat. I am looking forward to 4206A for starter, it's already in
delivery for 1 week from USA.I see that Norsat have A B C - 3 bands (Middle Lo Hi) concept. How unusual, but americaner
must always be something special.
I am also thrilled of my future results with new Prodelin 3.7 - i.e. gain figure. I red many posts about it and i know that is
very delicate in perfect reflector assembly because of many segments.Do you have your own tips & hints on 8 segment
reflector assembly? Do you have any signal strenght deviation with so big antenna as 3.7 m because of very narrow beam
and satellite movements over time/day?

Have a nice weekend,Primož
.

• Photo annex from the author No.4:       PF Prodelin 3.7M-AZ_EL-1374-990
  

.
.

• Answer to question nr. 2 :

Dear Mr. Primož ,

I have little time but here are the answers to your questions :

 Q1 > I red many posts about it and i know that is very delicate in perfect reflector assembly because of many segments.
Do you have your own tips & hints on 8 segment reflector assembly?

 A1 > This is totally nonsense , prodelin antenna is pressed to an accuracy of about 0.3 mm ! This stuff can claim only an
amateur who does not understand this issue at all .Material reflector antenna is made of extremely hard material - Glass
FIBER SMC,which guarantees the stability of the shaped reflector antenna for the lifetime .(this is not a chinese segments
of soft aluminum AL !)

Q 2 > Do you have any signal strenght deviation with so big antenna as 3.7 m because of very narrow beam and satellite
movements over time/day?
A2 >  This is more nonsense spread by the network as they NOT-educated amateurs !

 Real problems with achieving gains equivalent to the diameter of the antenna set up from the average of D=500 cm above
and only in KU band .370 cm diameter antenna is essentially a small diameter !

  I wish you a pleasant weekend Primož
.

• Photo annex from the author No.5:       PF Prodelin 3.7M-AZ_EL-1374-990
  

.

• TEXT questions No.3 :

Hallo Roman ,

Thank you again for answers

Regards,Primož
.

• Photo annex from the author No.6:       PF Prodelin 3.7M-AZ_EL-1374-990
  

                                                 
                                                    CZECH & SLOVAK DX SATELLITE CLUB
                                                          international professional portal
                                                                            think-tank
                                                          Roman Dávid - author & founder
                                                          mail : roman.david@dxsatcs.com