3
2. INTRO
Congratulations on purchasing the MHD101. You now own a high quality, professional DVB-T HD modulator. To get
the most out of your purchase, please take the time to carefully read through this manual.
3. INSTRUCTIONS
3.1 DESCRIPTION
The MHD101 is a high quality DVB-T “Home” modulator which accepts one HDMI and converts it into one RF DVB-T
channel on its output. The excellent picture (Full HD 1920*1080-30p) and modulation quality (MER~35 dB) renders
the MHD101 the ideal solution for distributing SD/HD digital signals coming from e.g. a DVD player, STB or camera
in a CATV network using the DVB-T technology.
The user has the ability to control the device by either using the onboard SSD (
S
even
S
egment
D
isplay) interface and
keypad for quick installation or by using the USB interface with the appropriate software accompanying the MHD101
for advance programming.
Finally, the MHD101’s metal case provides excellent electromagnetic shielding as well as great temperature
dissipation and rigidness.
3.2 FEATURES
● High quality and performance
● Very clean RF spectrum
● MER value ~ 35 dB
● RF output frequencies 174...862 MHz
● H.264 HD encoder bitrate 1-19 Mbps
● Very friendly user interface for quick installation
● USB interface for advanced programming
● External power supply
3.2.1 Auto-reset functions and watchdog
During the normal operation of the MHD101, the main CPU monitors all the internal parts in order to ensure that the
device works normally. In case of an internal error or module failure, the MHD101 immediately initiates the recovery
procedure by resetting the appropriate module or the device. Finally, watchdog timers ensure that the device will be
reset in case of CPU failure.
3.2.2 Buttons lock-mechanism
The MHD101 will lock the functionality of its buttons after 5 min idle time to avoid of being pushed accidentally. Two
red dots on the SSD notify the user that the button interface is locked. To unlock it, the user must press simultaneously
the UP + DOWN buttons for 5 seconds.
3.2.3 Digital attenuator
The MHD101 has an embedded digital attenuator. The user is able to select between three different attenuation steps
as follows:
1. 0 dB attenuation (Output level: 90 dBμV) SSD will display: “
00
”
2. 10 dB attenuation (Output level: 80 dBbμV) SSD will display: “
10
”
3. 25 dB attenuation (Output level: 65 dBμV) SSD will display: “
25
”
3.2.4 HDCP ON/OFF function
By pressing the “Channel / Profile” button for more than 5 sec the user enables the HDCP ON/OFF function. The SSD
will display this status as follows:
1. H1 : Indicating that the HDCP is ON
2. H0 : Indicating that the HDCP is OFF
Using the Up/Down buttons the user is able to select one of the above status to enable/disable the HDCP function.
The MHD101 will exit from the current functionality after being idle for more than 2-3 sec.
3.2.5 USB interface for advance programming
The MHD101 provides a USB interface with the appropriate software for advanced programming. For more information
read Appendix A.
