Business Voucher - TELE

Business Voucher - TELE
TEST REPORT
该独家报道由技术专家所作
Combo Signal Analyzer
Horizon
HD-STM
•can be used intuitively, manual is not needed
•perfect workmanship
•optimized for the day-to-day work of an installer
•gives all the "Must-Have" informations an installer needs
•very accurate readings and fast reaction to signal changes
TELE-satellite Magazine
Business Voucher
www.TELE-satellite.info/12/01/horizon
Direct Contact to Sales Manager
42 TELE-satellite — Global Digital TV Magazine — 12-01/2012 — www.TELE-satellite.com
www.TELE-satellite.com — 12-01/2012 —
TELE-satellite — Global Digital TV Magazine
43
TEST REPORT
Combo Signal Analyzer
Tune Your TV Antenna
A Satellite and Terrestrial Meter
with a Very Practical and
Intuitive User Interface
This new signal analyzer
is bigger than the other Horizon meters we have tested
in TELE-satellite. No wonder,
the HD-STM can measure
not only satellite DVB-S/S2
signals but also DVB-T and
even the old analog TV and
FM radio signals. The green
case color gives this meter a
somewhat military look, but
fortunately its case is made
of ABS plastic, not metal, and
a fully machined Aluminum
front panel. Its weight is also
quite “civilian”. Definitely,
you will not strain your neck
when working with the HDSTM at 2kg.
The meter sports 10 but-
tons: except for the navigation arrows and an OK button
in the middle of them, there
is an ON/OFF button and four
“soft” buttons located near
the LCD. Their function depends on the current menu
and is always displayed on
the screen. The last element
on the front panel is the signal
input connector. Along with
the meter itself, Horizon provided us with a short piece of
coaxial cable with F connectors on both ends, then an
F-to-IEC adapter and finally
2 pieces of 10 dB signal attenuators for the 5-1000 MHz
range. The latter ones come
in very handy when measur-
ing the output of a terrestrial
antenna amplifier.
The Horizon HD-STM is also
equipped with a car lighter
type DC charger, a mains
cord with the proper plug for
your region and an USB cable.
As with every other Horizon
meter, you do not need any
external power supply unit
but connect the mains cord
directly to the meter. This is
very practical as it saves the
hassle with a separate power
supply unit, all these items
can be stored in the padded
case supplied.
When you look at the HDSTM from the right side you
will notice: a slot for a SD
card, the USB port and a DC
power supply input to be used
with the car charger. The SD
card is to be used to log the
measurements results.
Horizon provides the User
Manual in an electronic form
– a file in PDF format on
the included CD-ROM. We
browsed through it and noticed that it is very detailed
and written in a simple style
illustrated with a huge number of screen-shots. However, for the purpose of this
test, we decided not to study
it in detail but start using HDSTM right away. In this way,
we wanted to check if the
user interface was intuitive
12-01/2012
Horizon HD-STM
Perfect choice for an installer who values
a practical instrument.
44 TELE-satellite — Global Digital TV Magazine — 12-01/2012 — www.TELE-satellite.com
1
2
3
4
5
6
7
8
9
10
11
12
46 TELE-satellite — Global Digital TV Magazine — 12-01/2012 — www.TELE-satellite.com
and self explanatory. Right
after the welcome screen,
you have three menu items:
SAT – to measure a satellite
signal, TERR – to measure a
terrestrial signal and SETUP
– to configure the basic settings of the meter. Pressing
a soft key (a button near the
screen) you make your selection. The very first screen in
satellite mode is already a
measurement mode. At the
top of the screen, you can
see the name of the satellite and a signal strength
measurement result in two
forms: bar graph and numerical. With the left and
right arrows, you change the
satellite until the HD-STM is
able to lock to the signal and
shows its parameters: channel power, modulation error ratio (MER) or carrier to
noise (C/N), channel bit error
rate and post-Viterbi bit error rate. You can also select a
desired satellite from the list
which is displayed after you
press the LIST soft key.
For each receivable satellite, HD-STM has at least
one transponder stored in
its internal memory. In this
way, when the meter locks
to the transponder, HD-STM
“knows” the satellite name. If
the factory preprogrammed
transponder settings are not
enough for you, you can add
your own custom transponders. The possibility to manually add more transponder
data when needed, without
turning to a PC but directly
from within the meter menu,
is an important asset of the
HD-STM. Simpler meters often do not allow this option.
If your antenna is not yet
set to receive a signal, Horizon’s HD-STM can help you
too. Simply switch it to spectrum mode and turn and tilt
your dish until you see peaks
of signals in the spectrum.
Span of the shown spectrum
is adjustable in the following steps: 60, 120, 240, 480,
960, 1200 MHz. Once you
maximized the peaks in the
spectrum view, you return
to the previously described
measurement screen and by
switching the satellite name
you identify to which satellite
you have just directed your
dish. If this is not the desired
one, knowing what satellite
you are receiving now gives
you a good hint what to do
with your dish: turn it eastwards or westwards.
Once your antenna is looking at the right satellite, you
delicately tilt it and slightly
turn it left or right to maximize all the readings which
the HD-STM is presenting.
Meter sensitivity and resolution is exactly as they should
be. HD-STM measures channel power with 0.1 dBµV and
MER and C/N with 0.1 dB resolution.
The HD-STM can be used
not only in simple installation with a direct connection
to an LNB. The meter is compatible with DiSEqC switches
and DiSEqC motors. Thanks
to that, you can check if your
customer has a problem with
a DiSEqC device or perhaps
everything is OK with the
switches and a motor but the
receiver itself does not generate the right DiSEqC commands. The HD-STM can also
detect an open circuit and
short circuit in the cable connecting it to the LNB. This is
also a helpful function. Operating the functions described
above is quite simple thanks
to the very logical menu
structure.
The HD-STM can also show
the constellation diagram for
both QPSK and 8PSK. Having
a little experience, you can
judge how noisy the signal is
just by looking at the graphs.
13
14
15
16
17
18
www.TELE-satellite.com — 12-01/2012 —
When we switched the HDSTM to the terrestrial mode,
it surprised us by asking in
which region of Poland we
live and even in the vicinity
of which city. That’s because
the test sample Horizon provided us with had been customized for Poland. Should
it be bought in some other
country, it would be customized with the settings suitable for that region. This is
quite helpful as you do not
have to memorize the channel numbers or frequencies
1. Main menu
2. Satellite finder
3. Spectrum view
4. Span increased to 960 MHz
5. Span decreased to 120 MHz
6. Constellation view (DVB-S2)
7. LNB and cable test result
8. DiSEqC switch submenu
9. DiSEqC motor submenu
10. SD card management
screen
11. Setup menu
12. Selecting a region in Poland
for terrestrial TV
13. Selecting a city in the region
14. Analog terrestrial channel
measurement
15. Digital terrestrial channel
(DVB-T) measurement
16. Constellation of a terrestrial
signal
17. Setting up power supply for
terrestrial antenna amplifiers
18. Logging measurement
results in the memory
TELE-satellite — Global Digital TV Magazine
47
of the DVB-T multiplexes in
different regions. However,
nothing prevents the HDSTM to show the whole spectrum, channel after channel,
if you so require.
But that’s not all. It is Horizon’s policy to make various settings for their meters
available on their web page.
You just download the most
recent settings dedicated to
our region and install them in
the meter’s internal memory.
To do this, you just need to
install a simple software that
is delivered on the included
CD-ROM. Not only terrestrial
but also satellite data is updated in this way.
The HD-STM can measure
both analog and digital terrestrial signals. It can even
show constellation diagram
for DVB-T. Moreover, you can
configure the meter to provide DC voltage for powering mast amplifier. You have
a choice of 5, 12 or 18 V DC.
The SETUP menu has quite
a number of items. Except for
typical settings like: the units
of channel power (dBµV, dBm
or dBmV) or LCD parameters, you can also choose
whether to measure MER or
C/N for digital satellite signals. We prefer MER as this
measurement is less dependent on meter type and brand.
Choice of menu language is
presently limited to English
and French but this is rather
not a big problem as most
users all over the world are
quite familiar with the English
terms related to measurement technique.
Your measurement results,
no matter satellite or terrestrial, can be stored on a SD
card as well as downloaded
to a PC. Horizon provides the
necessary PC software on
the included CD ROM. This
is applicable not only to the
values. You can also capture
screens of spectrum or constellation displays.
Summarizing the user interface, we are happy to state
48 TELE-satellite — Global Digital TV Magazine — 12-01/2012 — www.TELE-satellite.com
More on This Manufacturer
Read TELE-satellite’s Company Report:
HORIZON
that everybody who has just
basic orientation in TV signal
measurements will practically not need the user manual.
Perhaps. you may want to refer to the manual when creating additional transponder
entries or to learn how the
logging process works but
even in these cases most users can do fine without the
manual. The HD-STM firmware is really very intuitive.
Our test would not be complete if we did not compare
the Horizon instrument with
analyzers of other brands.
We selected two quite complex and expensive meters as
our references. We checked
the difference in satellite and
terrestrial
measurements.
Two satellites were the sources of signal: HOTBIRD on 13°
East (DVB-S2 11278 V transponder) and Atlantic Bird 3
on 5° West (one DVB-S2 and
two DVB-S transponders). In
terrestrial mode we had one
DVB-T carrier and 4 analog
carriers available in our location. See the charts in this
report. HD-STM performed
quite well – its readings were
very close to the results
shown by the other two meters. In one case, our reference # 2 was unable to lock
to the signal (DVB-S 12615H
9180 ks/sec from Atlantic
Bird) and it measured only
channel power but not MER.
But HD-STM had no problem
with this signal. Good job!
The HD-STM is not a fully
fledged signal analyzer but
it has most of the features
and functions a satellite and
terrestrial reception system
installers may need. Horizon’s policy with this meter
clearly was: to include all
“must have” features and to
forget all the “nice to have”.
Signal Analyzer Manufacturer, UK
www.horizonhge.com
www.TELE-satellite.com/TELE-satellite-1111/eng/horizon.pdf
www.TELE-satellite.com/TELE-satellite-0801/eng/horizon.pdf
www.TELE-satellite.com/TELE-satellite-0701/eng/horizon.pdf
Workmanship of the Horizon HD-STM is perfect and
it is equipped with a high capacity polymer battery. Its
satellite and terrestrial performance leaves nothing to
be desired. This is a perfect
choice for an installer who
values a practical instrument.
In this way, HD-STM has everything that is really relevant
for the installer to do the job
fast and easy. Of course, it
can not play video and audio
of the channel or tell you the
bit rate of video or audio, but
how many installers are eager to pay for such functions?
TECHNICAL
DATA
Manufacturer
Horizon Global Electronics Ltd.
Fax+44-1279-417025
E-mailsales@horizonhge.com
Web pagewww.horizonhge.com
ModelHD-STM
Function
Satellite and terrestrial antenna meter
SATELLITE:
RF Input range
950 – 2150MHz 40dBµV to 110dBµV
LNB Supply Voltages
13V Vertical 18V Horizontal (21V SCR)
LNB Short Circuit Protection
750mA maximum current limiter
Transponder memory
4000 definitions
Modulation supported
QPSK, DSS,
Satellite Bands
C, Ku and Ka
Input dynamic range
-70dBm to 0dBm
Symbol rate
1Msps – 45Msps
QPSK, 8PSK
TERRESTRIAL:
Channel bandwidth
Up to 8 MHz
Frequency range
49MHz (VHF) to 861MHz (UHF)
Input levels
-92dBm to -20dBm
Analogue measurements
Video and Audio levels
Expert Opinion
+
–
50 TELE-satellite — Global Digital TV Magazine — 12-01/2012 — www.TELE-satellite.com
Very intuitive user interface
Fast reaction to signal change
Good sensitivity and measurement resolution
Customized to your country - no useless transponder data to hack through
Data logging
Non-compliant with DVB-T2
Jacek Pawlowski
TELE-satellite
Test Center
Poland
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising