Digital Terrestrial TV MMDS 500W Indoor Digital TV Transmitter for
Wireless Coverage TV Broadcasting System
Multi-channel Microware Distribution System (MMDS) is also called
wireless cable or open-to -air cable. Internationally, MMDS
normally uses 2.1- 2.3GHz, 2.3-2.5GHz or 2.5-2.7GHz, 2.7-2.9GHz
frequency spans, and the most commonly used span is 2.5-2.7GHz.
MMDS is a mature and stable TV distribution and transmission
system, which makes it an important way of transmitting TV programs
to households and CATV head-ends.
HOORAYVISION’s MMDS broadband transmitter HTM-500D has stable
performance, with complete range of functionalities and great
variety, thus is able to suit most of the needs from both regional
and overseas customers.
The 500W MMDS Indoor Digital Transmitter is a kind of digital
facility working on S band (2.0-2.9GHz). This equipment adapted
latest generation power amplifier chip LDMOS. It supports both
analog and digital modulation and adapts to multiple modulation
modes like DVB-S/S2, DVB-T/T2, QAM, ISDB-T/TB and etc. AGC/ALC
function guaranteed the reliable operation of the equipment by
maintain constant power output of transmitter. Its LCD display
shows the parameters of output power, working voltage and AGC, can
monitor the abnormal values real-time. It also has auto-alarming
and lightning-proof functions. As the advantages mentioned above,
this equipment can widely apply to point to point and point to
multi-point transmission and signal coverage.
- With touchable LCD control panel to adjust the key parameters:
Output power range, Input level range, AGC range and monitor the
abnormal values real-time.
- Adapted new generation power amplifier (transmitting power
increased and un-linear distortion effectively decreased).
- Aluminum structural design, with natural heat dissipation or forced
air cooling design, equipment operational reliability can be
- Signal debugging design (maintenance can be simply carried out).
- Simple debugging procedure, signal opening can be achieved without
- Multiple choices in power level and local frequency.
- Extended interface for remote control.
- Small in size, easy for construction and maintenance.
|RF Output Power(P-P)||500W|
|RF Output Frequency|
(frequency band carrier signal takes could be set arbitrarily)
|Max Bandwidth: within 200MHZ|
|RF Output Interface||50Ω/N connector|
|Return Loss: 20dB|
|RF Frequency Response||BW: 200MHz|
|Passband Fluctuation: ≤2.0dB|
|Any Within 10MHz: ≤1.0dB|
|Group Delay Characteristics||≤40nsec|
|Local Frequency||2033MHz (or specified by user)|
|Local Oscillator Phase Noise||NΦ≤-100dB c/Hz@10KHz|
|IF Input Level||-25~-10dBm|
|IF Input Frequency||467~667MHz (or specified by user)|
|IF Input Interface||75Ω/F connector|
|Return Loss: 15dB|
|In-band Spur Restraint||-60dBc (relative signal level)|
|Automatic Level Control||20dB|
|Environmental Conditions||Working Temperature Range: -20°C~+45°C|
|Humidity: no condensation|
|Relative Humidity: 0~95% non-saturation|
|Working Voltage||AC 220V±10%,50/60Hz|