User's Manual

USER
MANUAL
MPD-1611291-A
EXACT-V2 High End Rack Modulator / Exciter
3/10/2017
MPD-1611291-A
Page 3/94
Table of Content
1 System Overview 9
1.1 General overview .......................................................................... 11
1.2 Block diagram .............................................................................. 12
2 Features Summary 13
2.1 Features Overview ........................................................................ 15
2.2 Input Stream Interfaces ................................................................ 17
2.2.1 ASI/SMPTE Inputs ......................................................................... 17
2.3 Input Stream Management ............................................................ 17
2.3.1 TS CleverSwitch Control ................................................................ 18
2.3.2 Seamless Switching ...................................................................... 19
2.4 Modulation Core ........................................................................... 19
2.5 Test modes operation .................................................................... 19
2.5.1 PRBS sequence ............................................................................. 19
2.5.2 Sinus tone generation ................................................................... 19
2.6 Digital Precorrection ...................................................................... 20
2.6.1 Digital Adaptive Precorrection ......................................................... 22
2.6.2 Manual Digital Pre-correction ............................................................. 25
2.6.3 Adaptive Linear pre-correction for sharp channel filters (in ATSC 1.0) ..... 25
2.7 Output Processing ......................................................................... 26
2.7.1 RF output muting and RF maintain features...................................... 26
2.7.2 Crest Factor Reduction Management ............................................... 27
2.7.3 DAP Operation .............................................................................. 30
2.8 Clock and Synchronization ............................................................. 32
2.8.1 GPS and clock management for VX20-x0x2 ...................................... 32
2.8.2 Warm-up Time ............................................................................. 35
2.8.3 Loss of Reference Signal management (LORS) ................................. 35
2.9 Power Measurements .................................................................... 37
2.10 Automatic Gain Control (AGC) ........................................................ 38
3 EXACT-V2 Rack 39
3.1 EXACT-V2 mechanics .................................................................... 41
3.1.1 Front panel layout ......................................................................... 41
3.1.2 Rear Panel Layout ......................................................................... 42
3.2 Interface characteristics ................................................................ 42
3.3 Front Panel signalization (LEDs description) ..................................... 52
3.4 Power requirements ...................................................................... 53
3.5 Performances and technical characteristics ....................................... 53
3.5.1 General characteristics .................................................................. 53
3.5.2 Control and data Ethernet interfaces ............................................... 53
3.5.3 Serial control interfaces ................................................................. 54
3.5.4 ASI inputs / output and MPEG-TS processing .................................... 55
3.5.5 Digital modulation ......................................................................... 56
3.5.6 Clock synchronization .................................................................... 57
3.5.7 RF and monitoring outputs ............................................................. 59