ATSC987 8-VSB Modulator
- Supports VHF/UHF bands for all off air applications to test all tuning range.
- Supports major cable plans (FCC, IRC, HRC) with level adjustment for cable applications.
Overview
The Sencore ATSC987 8-VSB Modulator is a low-cost 1U rack-mounted 8VSB Modulator designed for use in set-top box development, signal distribution, and low-power broadcast applications.Features
- Supports VHF/UHF bands for all off air applications to test all tuning range.
- Supports major cable plans (FCC, IRC, HRC) with level adjustment for cable applications.
- Versatile multi Transport Stream inputs:
- SMPTE310M input
- DVB Parallel input
- TTL Parallel input
- Optional ASI input
- IF loop-through for combining with external upconverter for use in low power transmission
- 10MHz reference clock input to add stability to the RF
- Front panel test output
Specifications
| Parallel Input | |
| Data Bit Rate: | 19.392658 Mbits/sec over LVDS or TTL |
| ATSC Data Stream | |
| Input Source: | TTL or LVDS (selectable) |
| One 25 pin D Sub Connector | |
| SMPTE310M | |
| Data Bit Rate: | 19.392658 MBits/sec |
| Modulation | |
| Modulation Type: | 8 Level VSB Trellis for ATSC Terrestrial |
| Broadcast | |
| In Band SNR: | 30 dB without equalization |
| IF (Loop Through) | |
| Carrier Frequency: | 44 MHz (center of channel) |
| Frequency Accuracy: | +/ 10 kHz (internal reference) |
| Connector Type: | BNC |
| Connector Impedance | 50 ohms (unprotected) |
| Power Level: | -10 to -15 dBmV |
| RF Output: | |
| Output Frequency: | Any channel of the NTSC channel plans |
| (user selectable) | |
| Channel Plan Selection: | VHF/UHF or Cable (FCC, IRC, HRC) |
| (user selectable) | |
| Frequency Accuracy: | +/ 10kHz with internal clock reference |
| Output Connector: | "F" Connector |
| Output Impedance: | 75 ohms |
| Output Power Level | Maximum of +45 dBmV |
| (Adjustable down to 40 dBmV) | |
| RF Test Point: | Same specifications as RF Output with level being 20 dB lower |
| External Clock Input | |
| • User may source an external 10 MHz reference to improve the RF Accuracy | |
| Dimensions | |
| • 17" x 3.5" x 20" • 16 lbs. | |
