Introduction
SKD121X Encoding & Multiplexing Modulator is a device that combines encoding, multiplexing and modulation. 12 channels of HD or SD input, one RF and one IP output. Easy operation, intelligent functions such as alarm system, parameter import and export, and abnormal reminder. The left side of the chassis is equipped with a server-level cooling fan, automatic temperature control to adjust the speed ,extend the life of the fan while ensuring normal heat dissipation.

Characteristics
12 HDMI or AV input
Optional MEPG2 or H.264 encoding
Synchronous RF and IP output
DVBC（J.83A、J.83B）、DVB-T output
No complicated system settings, just adjust the frequency to the required, simplify system debugging
PC or Smartphone app operation
3 temperature control fan powerful cooling

Technical Parameters
Encoding parameters
HDMI (1.4a) Video encoding Encoding standard H.264
Resolution 1920*1080_60P,1920*1080_50P;1920*1080_60i, 1920*1080_50i;1280*720_60p, 1280*720_50P
Bit rate 1-19.5Mbps
Audio Encoding standard MPEG1 Layer II AAC
Sampling Rate 48KHZ/44.1KHZ/32KHZ
Bit rate 384kbps
PSIP MGT、CVCT、STT、RTT Programmable program name, pmt PID, Video PID, Audio PID

Modulation parameters
J.83A Modulation standard Annex A
Constellation 64QAM, 256QAM
MER ≥40dB
RF frequency range 50 – 1000 MHz Minimum stepping 1KHz
Output electrical level ≥105dBuV （Adjustment range 0-20dB，stepping 0.5dB）
Out-of-band rejection ≥60
Symbol rate 5-6.900Msps
J.83B Modulation standard Annex B
Constellation 64QAM,256QAM
MER ≥40dB
RF frequency range 50 – 1000 MHz Minimum stepping 1KHz
Output electrical level ≥105dBuV （Adjustment range 0-20dB，stepping 0.5dB）
Out-of-band rejection ≥60
CABLE STANDARD HRC,IRC or STD
Symbol rate 5-6.900Msps

DVB-T Modulation standard DVB-T COFDM
Bandwidth 6/7/8MHz
Modulation constellation QPSK, 16QAM, 64QAM
Code rate 1/2, 2/3, 3/4, 5/6, 7/8
Protection interval 1/32, 1/16, 1/8, 1/4
Transmission mode 8K
MER ≥36dB
RF frequency range 50 – 1000 MHz
Minimum stepping 1KHz
Output impedance 75Ω
Output electrical level ≥105dBuV （Adjustment range 0-31.5dB，stepping 0.5dB）
Out-of-band rejection ≥60dB

DingShengwei Electronics Co., Ltd

(DSW) is dedicated to design, manufacture and sales of CATV analog & digital headend with our brand name SOUKA. DSW obtained ISO9001:2008 certificate authorized by CQC. We have 100 in-house skillful workers, which ensures the punctual delivery date. And a professional engineer team made up of 10 senior RF engineers and 6 IT engineers to fulfil precise management over all projects honored by our customers.

As one of the most reliable suppliers in this field, we continually spare no efforts in developing DSW into a world recognized brand with trustworthy and solid reputation. DSW sincerely invites you to enjoy the fascinating experience of modern technology and excellent customer service provided for you by our professional staff.

Our main products are modulators both in analog and digital ones, amplifier and combiner. We are the very first one in manufacturing the headend system in China. Our 16 in 1 and 24 in 1 now are the most popular products all over the world.

In 2016,we launched the digital 16 in 1 headend with 1080P output,which supports all digital TV standards in the world. And we never stop our steps,more products will be released in the coming days. We are young but we have faith to find our path to the peak.

Source: https://www.soukacatv.com/skd121x-encoding-multiplexing-modulator_p49.html