6. ﺍﻟﻤﺤﺘﻮﻳﺎﺕ
NANOXX 9800HD
HD Receiver with an unprecedented
14 ..................... number of features
TOPFIELD SRP2100 TMS
26 ...... Multimedia Receiver - Update
TECHNOMATE TM-2300
Satellite Antenna
Motor in
32 .................... Long-term Test
PROMAX
DIGITAL TO TV
DVB-T to Cable
36 ............................Modulator
GLOBAL INVACOM OPTISCAN
The First Signal Analyzer
84 ................ Media: China Satellite News :Beginner‘s Section
with an Optical
44 .................................. Input What Causes Juddering of H-H Dish
:Satelliten Information 10 ............................................ ?Motors
88 .................................... New Satellites
:DXer Report
DISHPOINTER 90 ............ News: Satellites Transmissions 52 .....How to control a satellite dish via PC
Satellite Installation
56 ............................. Software :Company Overview
94 ....... News: Digital Terrestrial Television
Best Satellite Companies
68 ...................................... of the World
96 ........................... News: IPTV & Cable
:Company Report
99 ....... Digital Terrestrial TV Handbook Satellite Receiver Manufacturer AZBOX,
HORIZON NANOSAT 72 ............................................ Portugal
Signal analyzer for the 115 .......... SatcoDX Satellite Handbook
do-it-yourself digital :DXer Report
62 ....... satellite system installer 174 ...................... History: 10 Years Ago 80 .......... Satellite DXer in Antalya, Turkey
ﺍﻟﺸﺮﻛﺎﺕ ﺍﻟﻤﻌﻠﻨﺔ
125 ............. SATCOM AFRICA-2010 25 ................................... HORIZON 5 ................................. ABCBIZNIS
129 ............. SATCOM RUSSIA-2010 21 .................................... INFOSAT 12 ...................................... ABCOM
35 .......................................SEATEL 29 ...................... GLOBAL INVACOM 92 ................................... ALUOSAT
97 ....................................... SENKO 180 .................................. JIUZHOU 65 ................................ ANGA-2010
7 ................................. SKYWORTH 91 ............................................ MFC 179 ...................................... AZBOX
69 ..................................... MOTECK 95 ............................ AZURE SHINE
49 .................................. SMARTWI
81 ............................................NAB 45 ................................BOIINGSAT
27 ....................................... SPAUN
39 .....................................NANOXX 89 .............................CABSAT-2010
77 ........................ SUBUR SEMESTA
93 ........................................ NETUP 53 ................................ CCBN-2010
17 .......................................... SVEC
83 ................................... OPENBOX 71 ...................................CES-2010
93 .................................... TEHNICB 123 .........................PASAT ANTENY 11 ............................. CHANGHONG
4 ..............................TECHNOMATE 51 .....................................PROMAX 121 ...... CONVERGENCEINDIA-2010
75 ................................. TELEMANN 87 .................................... PULSTAR 59 .................................CSTB-2010
2 .................................... TOPFIELD 41 ................................. ROGETECH 127 .......................... DISHPOINTER
67 ...................................... TRUSAT 87 .............................. SATCATCHER 8-9 .....................................DOEBIS
6 TELE-satellite — Global Digital TV Magazine — 12-01/2010 — www.TELE-satellite.com
7.
8.
9.
10. BEGINNER’S SECTION Dish Motor
What Causes
receivers have a maximum current output
of 500 mA, which is on the low side for a
motorised dish system. A single LNB alone
requires some 150 mA and if you add a
Juddering of H-H
motor’s starting current of approximately
320 mA you can see that there isn’t much
leeway left. If the starting current is even
higher due to a large and heavy dish or
Dish Motors?
some obstacle in the antenna’s way the
receiver’s current limiter activates and
stops the flow of current, resulting in a
juddering dish movement.
Heinz Koppitz
Workaround: A smaller and therefore
A motorised dish can quickly turn from blessing to lighter antenna often does the trick. In
some cases, however, only a new receiver
nuisance if the antenna rotates too slowly or starts to with a current output of more than 500
judder when large angles are covered. When worse mA will help alleviate this problem. On
comes to worst the motor might even get stuck, causing most receivers the maximum output is
indicated on the back panel next to the
the receiver to freeze as a consequence. What’s the
coax socket.
reason for this and is it a defect of the motor?
Case 3 – The receiver freezes
Actually, the motor is not to blame. Dish ogy is the culprit. For reasons of compat- when it is switched on and the dish
motors of major brands are generally ibility switching the LNB from horizontal
motor never starts moving.
state-of-the-art and sport the DiSEqC 1.2 to vertical reception still takes place with
protocol, meaning they can be controlled changing the supply voltage from 18 V
with all corresponding DiSEqC commands to 14 V. Reduced voltage automatically Having installed a motorised dish only
sent by receivers. They also accept all results in reduced motor movement. to find out that the receiver freezes and
Goto X commands (DiSEqC 1.3 or USALS) switches off while booting is everybody’s
which are used to precisely move the dish Workaround: There’s not much you nightmare. This happens with receivers
to any available satellite position. can do to achieve consistent movement which not only have a current output of
speeds. Some receivers increase voltage less than 500 mA, but which also react
This means we need to look elsewhere to 18 V while the motor runs and switch too sensitively whenever current peaks
to identify the problem, which mostly back to 14 V (if vertical signals need to occur. During the booting process the
be received) when the final position dish motor also activates right away and
lies in the supply voltage provided by
is reached. Usually there is no indica- consumes a short but powerful current
the receiver to the LNB. The same power
tion of this on the receiver itself and in pulse which causes these receivers to
supply is also used by the dish motor
most cases it is not even mentioned in abort booting.
and two devices drawing power from
the same supply may cause insufficien- the technical specifications. What would
be an ideal solution is LNBs which accept Workaround: The only thing that really
cies. We have to bear in mind that this
DiSEqC commands and can be switched makes sense is exchanging your receiver
power supply was implemented in receiv-
for another model.
ers long before there was even any talk with simple DiSEqC requests generated
of DiSEqC-based dish motors and it was by the receiver. Unfortunately, such LNBs
If you want to avoid having to buy a new
never designed for any additional current do not – yet – exist.
receiver you may also hook up the DiSEqC
consumers.
Case 2 – The dish motor does not control device of your motor’s manu-
facturer to the antenna line. While this
Case 1 – The dish motor only move continuously and stops in
gadget is originally designed for DiSEqC
moves slowly at times. between. 1.0 receivers unable to create commands
for the motor, it does come with a line
If your dish motor sometimes moves If your dish motor judders this is a clear amplifier that makes sure sufficient cur-
too slowly conventional switching technol- indication of receiver overload. Many rent is available at all times.
10 TELE-satellite — Global Digital TV Magazine — 12-01/2010 — www.TELE-satellite.com