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ASI to QAM or ATSC CATV RF Modulator

Name: ASI to QAM or ATSC CATV RF Modulator
Brand: Thorbroadcast
Price: 2895 USD
Availability: InStock

H-ASI-QAM

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Price: $2,895.00

Availability:	In stock	Condition:	new
Shipping:	starting at $22.00	Warranty:	2Yrs

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Description Features Drawings Models Accessories Specification Q&A Support

Description

This unique modulator allows for ASI input and ASI output for program management to decode and output via IP and RF. It provides a more powerful receiving ability of various Transport Streams that come from an encoder, multiplexer, DVB gateway, scrambler and video server. In addition, the modulator also has the ability of outputting RF while simultaneously sending out IP. This device supports local and remote control through NMS software. This unit has wide array of functional uses from Broadcasting, Interactive Services, News Gathering and other Broadband satellite applications.

Tags: ASI streaming RF Modulator

Features

Fully complying with DVB-C(EN300 429), ITU-T J.83A/B/C standard
Symbol rate adjusting range: 5.0Msps~9.0Msps
Five constellation modes: 16QAM, 32QAM, 64QAM, 128QAM and 256QAM
ATSC, DVB-T, ISDB-T modulations avaialble - model dependent
ASI input
DATA output via RJ45 - Mulitcast and Unicast, RTP,RTSP,UDP
Scrambler
Web NMS Interface
SNMP
Huge buffer memory for the burst code stream
Intelligent null packet deleting, automatically TS filling
PCR accurate adjusting
NIT insertion
PID filtering, re-mapping and PSI/SI update synchronously
Output frequency range: 30MHz~1000MHz in 1 kHz step
Output frequency attenuation range: -16dBm~+12dBm in 0.5dB step
LCD and keyboard operation
NMS operation

Drawings

Model Selection

H-ASI-QAM - ASI to QAM Digital modulator

H-ASI-ATSC - ASI to ATSC Digital modulator

H-ASI-DVB-T - ASI to DVB-T Digital modulator

H-ASI-ISDBT - ASI to ISDBT Digital modulator

Accessories & Upgrades

Specification

Input	1channel ASI input, BNC interface, 75Ω
Modulation	QAM or ATSC or DVB-T or ISDBT Channel (model depandent) defalt unit comes with QAM Modulation	1
	Standard	EN300 429/ITU-T J.83A/B/C
	Symbol Rate	5.0~9.0Msps 1ksps stepping
	Constellation	16/32/64/128/256QAM
	FEC	RS(204, 188)
RF Output	Connector	F Type, 75Ω impedance
	RF Range	30~1000MHz 1kHz Stepping
	Output Attenuation	-16dBm ~ +12dBm 0.5dB Stepping
IP Output	IP output in UDP/RTP/RTSP - SPTS/MPTS, Unicast/Multicast
System	LCD/keyboard operating and NMS support
	English
	Software update via Etherent
General	Dimension(WDH)	482mm × 300mm × 44mm
	Weight	2.3kg
	Temperature	0~45°C (Operation) ;-20~80°C (Storage)
	Power	AC 110V±10%/50/60Hz or AC 220V±10% /50/60Hz
	Consumption	22W

Question and Answers

Question:

We are a small CATV/ISP in Northwest Pa. We are having an issue with a particular receiver (media kind) which delivers HLN, CNN, TBS, TNT, and TCM.

We have existing drake qam modulators, varying models, that take the ASI input and place the chosen stream onto an rf channel on our plant. The issue we are having is it appears the ASI data stream is to large for our qam modulators and we are experiencing buffer overflows resulting in pre BER errors. I have no means for adjusting the ASI data stream in this receiver as it is controlled by the Turner group or whomever they call themselves today.

You have an ASI to QAM modulator listed on your site. Is it possible to obtain a demo unit, or get a unit and return if it doesn’t resolve our problem, to test and confirm it will work?

Answer:

Questions:

I discussed this with our engineer, and he believes you are receiving ASI with an MPTS (Multi-Program Transport Stream). Is that correct, or is it only a single, non-muxed TS?

If it is MPTS, what is the ASI bit rate? Our ASI-to-QAM modulator can generate up to 4 physical QAM channels.

One 256-QAM channel can carry up to 38 Mbps, so if multiple transport streams are multiplexed on the ASI input, we can distribute them across four different RF frequencies.

Please find my answers bewlo :

I discussed this with our engineer, and he believes you are receiving ASI with an MPTS (Multi-Program Transport Stream). Is that correct, or is it only a single, non-muxed TS?

The ASI does have MPTS. We have five transport streams available on ASI output. I can configure up to 3 ASI outputs but cannot select specific TS to show on specific ports. All five on each ASI port.

If it is MPTS, what is the ASI bit rate? Our ASI-to-QAM modulator can generate up to 4 physical QAM channels.

I cannot see what the ASI bit rate is out of this receiver.

One 256-QAM channel can carry up to 38 Mbps, so if multiple transport streams are multiplexed on the ASI input, we can distribute them across four different RF frequencies.

We have found that if we keep the QAM channel at or below 34Mbps, the crappy tv’s on our network will work fine. As of now we pick four of the five TS on one QAM RF channel and mux the fifth TS onto another QAM RF Channel. Having the one Modulator output multiple QAM channels is a benefit as we can split the five across two QAM channels and assure we keep the QAM data rates well below our 34mb mark.

Lastly – It feels like the asi stream bit rate is too high for the drake MQM and MQL modulators we have. The buffer max’s out. I also have an old cisco qam modulator we use for testing and there is an overflow error which leads to a higher ASI rate than they can process.

Documents

H-ASI-QAM - QUICK SETUP GUIDE