1. TEST REPORT DVB-C Signal Meter
Horizon HD-CM Cable Meter
Fast and Practical
Cable technology is a bit different than satellite technology. 06-07/2010
This new Horizon cable meter won’t show you a frequency HOR IzON HD- CM CAB
Small, lightweight and
lE METER
easy to use
spectrum nor will you see any TV video. But are these features any where in the wor ld
really necessary and would you be willing to pay for them?
Think again. These questions are especially appropriate when it
comes to cable networks. In satellite TV, a channel could occupy case and plug the car charger
any frequency within a band, but in cable TV there is always a cable into the charging port.
channel plan with precisely defined channel frequencies. There’s
Next to the 12 VDC socket,
no need for any fine frequency adjustment where a spectrum there’s a USB port for con-
view could help. The channel plan may differ from region to necting the meter to your
region in the world (there are several different plans) but once PC. The AC power socket can
be found on the rear panel
you know the country, you know the band plan. What you really behind another Velcro flap in
need to know is the signal strength and quality of every channel the carrying case.
that is supposed to be present at a cable TV wall socket. This
All Horizon meters come
becomes a piece of cake if you happen to own Horizon’s HD-CM with built-in power supply
signal meter. units. To charge the internal
batteries, there’s no need to
Horizon offers the HD-CM USB cable. The battery pack tor adapter. In some coun- use an external power supply,
in two flavours: one comes is already installed inside the tries, IEC169-2 connectors just a cable. It doesn’t get
with the DVB-C specifications HD-CM. are used instead of F connec- any more simple and conve-
for the Americas (annex B, tors. nient than this.
Open Cable), and one ver- A rain cover attached to
sion for the rest of the world the front panel serves to pro- Attaching the quick-start When using the meter for
(annexes A and C). tect the display and keyboard guide to the cover was a bril- the first time, it would be a
from the elements. Horizon liant idea. If you don’t use good idea to charge the bat-
When you open the pack- recommends keeping the the meter everyday or use a tery for at least eight hours.
age that the HD-CM came in, cover in place at all times; we number of them (like TELE- It’s a high capacity Ni-MH
you’ll find the meter in a black removed it only to take pic- satellite test editors do) it 3300mAh battery and can
carrying case, an AC power tures of the meter. The only really helps. The meter is provide nine hours of opera-
cable, a DC car charger and a thing missing was a connec- enclosed in a small plastic tion from a single charge. If
housing that is quite typical necessary, the battery can be
for Horizon. You can order the replaced by opening a flap on
TELE-satellite World www.TELE-satellite.com/...
Download this report in other languages from the Internet:
HD-CM meter in any color as
long as it’s blue.
the bottom side of the meter.
Arabic ‫العربية‬ www.TELE-satellite.com/TELE-satellite-1007/ara/horizon.pdf
Indonesian Indonesia www.TELE-satellite.com/TELE-satellite-1007/bid/horizon.pdf You might think that a
Bulgarian Български www.TELE-satellite.com/TELE-satellite-1007/bul/horizon.pdf
Czech Česky www.TELE-satellite.com/TELE-satellite-1007/ces/horizon.pdf
The front panel is black with meter that comes with a bat-
German Deutsch www.TELE-satellite.com/TELE-satellite-1007/deu/horizon.pdf clearly visible yellow labeling. tery and an AC power supply
English English www.TELE-satellite.com/TELE-satellite-1007/eng/horizon.pdf
Spanish Español www.TELE-satellite.com/TELE-satellite-1007/esp/horizon.pdf Four arrow buttons are all you built into it would make it
Farsi ‫فارس ي‬ www.TELE-satellite.com/TELE-satellite-1007/far/horizon.pdf
French Français www.TELE-satellite.com/TELE-satellite-1007/fra/horizon.pdf need to operate this meter heavy, but that’s not the case
Hebrew ‫עברית‬ www.TELE-satellite.com/TELE-satellite-1007/heb/horizon.pdf
Greek Ελληνικά www.TELE-satellite.com/TELE-satellite-1007/hel/horizon.pdf and it comes with a 128x64 with the HD-CM; it weights
Croatian Hrvatski www.TELE-satellite.com/TELE-satellite-1007/hrv/horizon.pdf
Italian Italiano www.TELE-satellite.com/TELE-satellite-1007/ita/horizon.pdf pixel backlit LCD that is easy only about 1 kg. The printed
Hungarian Magyar www.TELE-satellite.com/TELE-satellite-1007/mag/horizon.pdf
user manual included in the
Mandarin 中文 www.TELE-satellite.com/TELE-satellite-1007/man/horizon.pdf
to read.
Dutch Nederlands www.TELE-satellite.com/TELE-satellite-1007/ned/horizon.pdf package is detailed yet very
Polish Polski www.TELE-satellite.com/TELE-satellite-1007/pol/horizon.pdf
Portuguese Português www.TELE-satellite.com/TELE-satellite-1007/por/horizon.pdf When on the road, you can easy to understand.
Romanian Românesc www.TELE-satellite.com/TELE-satellite-1007/rom/horizon.pdf
Russian Русский www.TELE-satellite.com/TELE-satellite-1007/rus/horizon.pdf charge the meter using the
Swedish Svenska www.TELE-satellite.com/TELE-satellite-1007/sve/horizon.pdf
Turkish Türkçe www.TELE-satellite.com/TELE-satellite-1007/tur/horizon.pdf included car charger; just lift Overall, our first impres-
Available online starting from 28 May 2010 the Velcro flap on the carrying sion of the HD-CM is that of a
40 TELE-satellite — Global Digital TV Magazine — 06-07/2010 — www.TELE-satellite.com

2. small, very handy instrument Navigating through the button. You then push the
that is solidly manufactured. setup menu involves using down arrow button and, voilà,
the up/down buttons while you are in the main menu.
Everyday use the left/right buttons are The main menu only has
used to change any of the four items: Full scan, Short
There are two ways to turn
settings. In other instru- scan, Slope test and Select
the HD-CM on: pressing the
ments we tested, the left/ plan. After checking that the
up arrow button or pressing
right arrows were used for
the down arrow button. The
changing menu items; the
up arrow displays the setup
Horizon method seems to be
menu in which you can set:
more intuitive: the up/down
• status of backlight (on/
method lets you more easily
off),
see what the next/previous
• clicking sound (on/off)
menu item is.
• brightness level (0
through 15),
Horizon decided to put the
• contrast level (practical
channel plan in the main menu
values from 10 through 30),
instead of the setup menu. To
• automatic sleep mode
get to the main menu, you
due to inactivity (1 to 30
first have to leave the setup
minutes or always on)
menu by highlighting Exit
• squelch level for back-
and pressing the right arrow
ground noise cutoff (-75 dBm
through -55 dBm or OFF)
• language (only English
was available in our test unit)
• unit of signal power
measurements (dBµV, dBm,
dBmV)
• factory defaults
www.TELE-satellite.com — 06-07/2010 — TELE-satellite — Global Digital TV Magazine 41

3. proper channel plan was set, push of a down arrow button replaces the MER with the Unfortunately, the HD-CM
we started a full scan. The displays the audio level value. BER. does not offer a fully automatic
scan goes through the entire scan in which all channels
cable TV bandwidth starting Note that the displayed We tested the meter on would be found, measured
from the lowest channel. audio frequency is slightly dif- various analog and digital sig- and stored in memory. If you
ferent from the video carrier nals available on two different want to get a complete pic-
As soon as the meter frequency; this is normal for cable networks. The HD-CM ture for a given TV subscriber
detects a signal, it stops an analog signal. Pressing the locked onto signals without socket, channels need to be
scanning and starts analyzing down arrow button a second any delay and provided stable stored in memory one at a
it. It tells you if the signal is time displays the C/N ratio in and repeatable results. We time. This isn’t really practi-
an analog channel or a digi- decibels. Once all the data for had no problems handling the cal; hopefully Horizon will add
tal channel by displaying the the channel has been identi- keyboard and reading the dis- an automatic scan in a future
letter A or D and a small icon fied, the scan can be con- play. firmware upgrade.
representing it. tinued by pressing the right
arrow button (to continue to The HD-CM can also store An interesting feature is
An analog channel is the higher channels) or the any of the results in its the slope test measurement.
depicted with two uneven tri- left arrow button (to continue memory for future reference The HD-CM meter compares
angles while a digital channel to the lower channels). with the help of the up arrow the level measurements of up
displays something similar to button. If you connect a PC to to five preselected carriers
a trapezoid. These icons are When a digital channel is the HD-CM using a USB cable, to check that the differences
meant to represent the shape found, the HD-CM displays these results can then also be between them aren’t exces-
of an analog or digital signal frequency and RF level mea- downloaded to that PC. sive which, for example, could
as it would appear on a spec- surements. Pressing the down be due to attenuation intro-
trum analyzer screen. arrow button shows the MER An HDCM Log Reader appli- duced by low quality coax
reading. The frequency field cation is available from Hori- cable. The results are first
When an analog channel is rotates between the following zon for free and lets you not shown graphically in the form
found, the HD-CM shows the measurements: symbol rate only read the meter memory of vertical bars but when the
channel number, frequency, in kBd, QAM order, phasing of but also export results to a down arrow button is pressed,
analog channel descriptor IQ vectors (normal/inverse) CSV file allowing you to view the results of the reference
and video signal level as a bar and frequency. Pressing the the results using a program carrier were displayed. Any
graph and also numerically. A down arrow button again such as Excel. carrier can be set as the ref-
erence carrier. These results
can also be stored in the
meter’s memory.
We were impressed with
these features but it would
have been nice if the prese-
lected carrier frequencies
were user-settable rather
than being fixed in the firm-
ware. Horizon can make this
handy and practical meter
even more useful by incor-
porating a few firmware
changes.
42 TELE-satellite — Global Digital TV Magazine — 06-07/2010 — www.TELE-satellite.com

4. 1 8
2
9
3
In addition to RF signal radio carriers which are are compliant with DVB-C
measurements, the meter quite often present in ITU-T J.83 in all three
can also measure any DC cable TV networks. On regions: A, B and C.
or AC voltage that might the other hand it’s under-
4 be present on its “F” con- standable that a simple
This makes the meter
nector. and affordable meter
suitable for use in nearly
cannot have every pos-
every region of the world
It’s a useful feature sible feature.
although an installer (including the USA);
might appreciate it if the On the plus side though, even the power supply
meter could also rec- it’s worth mentioning that is rated for 100-240VAC
ognize and measure FM the two meter variants (50/60 Hz).
Expert Opinion
+
Small and lightweight
Practical rain cover and carrying case
Simple menu structure
Fast signal locking and stable measurements of
5 1. Main menu all important channel parameters
Jacek Pawlowski
All DVB-C modes, compliant to ITU-T J.83 TELE-satellite
2. Setup menu - Test Center
regions A, B, and C Poland
top part
Built-in power supply
3. Setup menu -
midlle part -
FM radio channels are not recognized and measured
4. Setup menu -
Automatic logging of the entire spectrum is not possible
bottom part
(only channel by channel)
6 5. Analog video
level measurement
6. C/N
TECHNICAl
DATA
measurement of
Manufacturer Horizon Global Electronics Ltd., England
analog signal
Fax +44 (0) 1279 417 025
7. Digital signal E-mail sales@horizonhge.com
level measurement
Web page www.horizonhge.com
8. HDCM log Model HD-CM for the Americas, and rest of World
7 Reader – results
Function Digital and analog cable TV meter
of 2 digital and 2
analog channels Input frequency 51~858 MHz
in dBm Signal level -75dBm to +17dBm
Symbol Rate 0.87 to 6.9 Mbaud
9. HDCM log
Reader – results Power supply 100~240 V, 50/60 Hz, 0.31A max.
of 2 digital and 2 12 V DC, 0.8 A max.
analog channels in
Operational time when fully charged 9 hours typ.
dBµV
44 TELE-satellite — Global Digital TV Magazine — 06-07/2010 — www.TELE-satellite.com