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  1. 1. TEST REPORT Big Dish for Ku-Band P140 of Pasat Anteny Prime Focus Dish for Ku-Band When it was delivered, I did not know what it was. A huge wooden box weighting 96 kg that occupied half of my garage. After checking the papers it came out that indeed it was a parcel for the TELE-satellite test center. Only then, I recalled that a while before Alex had notified me about an antenna for test from the Bulgarian company Pasat Anteny. I asked myself: if the package was so massive and solid, would the antenna be equally strong and robust? This was one P140 OF PASA 06 -0 7/ 20 09 T ANTENY of the questions the test was supposed to Very solid an d robust dish stable rec eptio for highly n answer! ■ The feedhorn is included in the antenna kit 40 TELE-satellite & Broadband — 06-07/2009 —
  2. 2. TELE-satelliteother Download this report in World from the Internet: Arabic ‫ﺍﻟﻌﺮﺑﻴﺔ‬ Indonesian Indonesia Bulgarian Български Czech Česky German Deutsch English English Spanish Español Farsi ‫ﻓﺎﺭﺳﻲ‬ French Français Greek Ελληνικά Croatian Hrvatski Italian Italiano Hungarian Magyar Mandarin 中文 Dutch Nederlands Polish Polski Portuguese Português Romanian Românesc Russian Русский Swedish Svenska Turkish Türkçe Available online starting from 29 May 2009 — 06-07/2009 — TELE-satellite & Broadband 41
  3. 3. I needed a hammer and The time came to install a crowbar to open the box an LNB. The antenna is and take the antenna com- equipped with a feedhorn ponents out of it. Every part for Ku-Band. The feedhorn of the kit was very carefully is optimized for this type wrapped up with protective of PFA antenna, a regu- foil. There was no chance lar LNBF for Offset dishes for the smallest scratch due would not give good results to transportation. I really when mounted on a Prime ■ Antenna has been delivered in a very solid wooden box liked that. Only profes- Focus Dish. sional equipment is packed with such attention. When The feedhorn is meant for everything was unpacked, I LNBs with a flange, which noticed that there are only unfortunately was not avail- few components. Good - it able in my shack at time should be simple to assem- of test. What I had in my ble it. drawer was an LNBF for Ku- Band already equipped with And indeed. Despite the a PFA feedhorn (NF=0.3dB). fact that there was no It was too thick and did not detailed instruction but fit to the original holder. I only one drawing showing had to put aside the origi- an assembled antenna, the nal feedhorn and its holder assembly was so straight- and use another holder forward that everybody matching the LNBF. Finally, could do that in no time. I was ready to take meas- ■ Antenna consists of not too many parts... Everything fitted perfectly urements. so it was nothing but fun. I aimed the antenna at I was slightly surprised more or less proper direc- when I discovered that the tion and immediately I saw antenna had been designed the signal on my signal ana- for a mast of 70 mm diam- lyzer. The signal analyzer eter. More common dimen- identified satellite position sion is 60 mm (and of course as 28.2 ° East (Astra sat- 40 mm for small dishes). ellite). I played for a while After checking that the and every time I got a very bolts fixing the antenna to good quality signal. For the mast are long enough, example, MER = 17.4 dB I decided not to build the and even more! new test mast but use my existing test setup with a But how about receiving 60 mm mast. However, for weak satellites? I studied a permanent installation, I carefully the footprints of recommend using a mast different satellites on Sat- of the proper diameter - 70 coDX webpage and realized mm. that living in Poland is a very good thing for a sat- When the dish was put on ellite fan but not necessar- the mast and all the nuts ily when you have to test a and bolts were tightened, big dish. Most of the beams I noticed with satisfaction aimed at this or that part that the antenna is really of Europe also cover the solid and robust. That’s center of the continent with very important especially very strong power. 90 cm for an antenna of this size. is quite enough to receive Its viewing angle is so small most of the satellites and that even a small backlash beams. There are only a can severely affect the few regional beams that do ■ ... so assembling it is really simple reception. not cover my location but 42 TELE-satellite & Broadband — 06-07/2009 —
  4. 4. ■ Last bolts to be tighten are those fixing the antenna to the mast ■ We used an LNBF we had in the drawer, so the original feedhorn and its support were not needed ■ Only with a really big dish you can get such high ■ This is the feedhorn holder readout of MER and NM ■ Aimed at HOTBIRD 13E 44 TELE-satellite & Broadband — 06-07/2009 —
  5. 5. Fig.1 in such cases, 140 cm is far As I expected, the qual- too small to receive them. ity of the signal was sig- nificantly better. Its MER The only practical candi- value was better by 1-2 dB date for the reception sen- for 0.9 meter dish and 3-4 sitivity test was the beam dB for 0.6 meter dish. Per- EXPA22K2 of EXPRESS haps some of our readers AM22 satellite (53° East). will be surprised but the Its footprint looked as if I signal level I got from P140 should be able to receive it and prime focus LNBF was with a 150-190 cm antenna not higher than that from (signal strength >40 dBW), smaller dishes. In digital yet I hoped I could get TV, it is much more impor- something with the P140. tant to have a big signal to Should it be 42-43 dBW, the noise ratio rather than the antenna could even be able absolute signal level. To to lock to the signal. achieve this, one must have a big antenna. (Fig.1) When I was trying to aim PASAT 140 at this satellite, Based on these compari- I realized that its elevation son measurements, I can adjustment bolt is too short state that P140 is indeed for that bird. I needed to an antenna of high gain. It set the elevation 21.4 ° but means that the curvature of it was out of range of the the surface is correct and dish. The antenna eleva- the signal is focused in the tion with our test dish could point where the feedhorn is be set from approximately mounted. The dish is very ■ This footprint hardly reaches our test center, but Pasat dish was able to 25° to 70°. The simplest get some signals. solid so if you only put it on thing I could do was set- ting antenna elevation to a strong enough mast, it will Expert Opinion the lowest possible position last for years and years. + and additionally tilting the Very solid and robust dish. Everything fits per- Its elevation setting range fectly. It is packed very carefully. Workmanship mast by a few degrees. (25-70°) is more suitable leaves nothing to be desired. for the countries located After I did it, I noticed the spectrum of EXPRESS closer to the equator then - Jacek Pawlowski TELE-satellite for my location in Poland none Test Center AM22 signal on my signal Poland (52° North) but of course analyzer. C/N readout was it depends on the satellite at the level 8 dB. Unfortu- nately, it was slightly below you want to receive. Pasat TECHNIC the reception threshold. will deliver dishes with DATA One decibel more or so and other settings ranges, if Manufacturer Pasat Anteny, Bulgaria I could enjoy seeing some- you specify your needs. Telephone +359 350 6 3911, +359 350 6 6311 Fax +359 350 6 4011 thing. If you decide to pur- Website Bad luck. I was wonder- chase one of these robust Email ing how should I asses and easy to install dishes, Function Prime focus aluminum dish for Ku-Band the performance of this remember about the mast Model P 140 dish? Finally, I decided to of 70 mm diameter and a Diameter 140 cm use much stronger satel- suitable flange LNB for Ku- Focus 50 cm lite (HOTBIRD at 13° East), Band that can be attached F/D 0.375 measure signal quality and to the feedhorn with 4 Gain @ 11.350 GHz 42.2 dB compare it to signal qual- screws. Gain @ 12.125 GHz 42.8 dB Gain @ 12.626 GHz 43.5 dB ity from a 0.6 m dish and a 0.9 m dish. The dishes The Pasat dish is per- Noise temperature (at elevation 42°) 47 K were equipped with differ- fectly suitable for profes- Opening angle (-3dB) <1.25° ent LNBF’s but all of them sional installations, and for Thickness 1.2 mm were of quite good quality private users when they Reflector mass 6 kg (NF = 0.3~0.4 dB). want a real stable signal. Supporting hardware mass 5.2 kg 46 TELE-satellite & Broadband — 06-07/2009 —