BS EN 50083-7:1996+A1:2000:2009 Edition
$198.66
Cable networks for television signals, sound signals and interactive services – System performance
| Published By | Publication Date | Number of Pages |
| BSI | 2009 | 64 |
Describes measurement of operational characteristics of cabled distribution systems having coaxial cable outputs and operating between about 30 MHz and 1750 MHz.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British Standard |
| 4 | Foreword Foreword to amendment A1 Contents |
| 7 | 1 Scope 1.1 General 1.2 Specific scope of this Part 7 |
| 8 | 2 Normative references 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions |
| 13 | 3.2 Symbols |
| 14 | 3.3 Abbreviations 4 Methods of measurement 4.1 Mutual isolation between system outlets |
| 15 | 4.2 Amplitude response within a channel |
| 17 | 4.3 Chrominance-luminance gain and delay inequalities |
| 18 | 4.4 Non linear distortion |
| 22 | Table 1 – Residual carrier reduction factors |
| 26 | 4.5 Carrier to noise ratio |
| 27 | 4.6 Echoes |
| 28 | 4.7 Television and frequency modulation radio signal level |
| 29 | 4.8 Data echo rating and data delay inequality 4.9 Interference in FM sound radio channels 4.10 Signal level for digitally modulated signals |
| 31 | 4.11 Signal to noise ratio ( |
| 32 | 5 Performance requirements 5.1 Impedance 5.2 Carrier levels at system outlets |
| 33 | Table 2 – Carrier signal levels at any system outlet Table 3 – Maximum level differences at any system outlet between distributed television channels |
| 34 | 5.3 Mutual isolation between system outlets Table 4 – Mutual isolation 5.4 Frequency response within a television channel at any system outlet for PAL and SECAM signals Table 5 – Amplitude response variation Table 6 – Group delay variation 5.5 Long term frequency stability of distributed carrier signals at any system outlet 5.6 Random noise |
| 35 | Table 7 – Carrier to noise ratios at system outlet 5.7 Interference to television channels |
| 36 | 5.8 Video baseband requirements 5.9 Hum modulation of carriers in television channels 5.10 FM sound radio: Additional performance requirements 5.11 NICAM performance |
| 37 | Figure 1 – Arrangement of test equipment for measurement of mutual isolation between system outlets Figure 2 – Arrangement of test equipment for measurement of frequency response within a channel |
| 38 | Figure 3 – Interpretation of displays for measurement of frequency response within a channel Figure 4 – Test signal (signal F for 625 line systems) employed for chrominance/luminance gain and delay ine… |
| 39 | Figure 5 – Test signal (signal B2 for 625 line systems) employed for chrominance/luminance gain and delay in… Figur 6 – Arrangement of test equipment for measurement of chrominance/luminance gain and delay inequality |
| 40 | Figure 7 – Displayed pulses: chrominance low and lagging Figure 8 – Displayed pulses: chrominance high and leading |
| 41 | Figure 9 – Weighting curve for 625 lines systems B and G (PAL); CW interference with no special (frequency o… |
| 42 | Figure 10 – Weighting curve for 625 lines system I (PAL); CW interference with no special (frequency offset) … |
| 43 | Figure 11 – Connection of test equipment for the measurement of non-linear distortion by composite beat |
| 44 | Figure 12- Weighting curve for 625 lines systems B an G (SECAM); CW interference with no special (frequency … |
| 45 | Figure 13 – Weighting curve for 625 lines system L (SECAM); CW interference with no special (frequency offset… |
| 46 | Figure 14 – Hum modulation envelope Figure 15 – Connection of equipment for measurement of hum modulation (DC method) |
| 47 | Figure 16 – Calibrated potential divider Figure 17 – Stable variable DC source |
| 48 | Figure 18 – Oscilloscope display Figure 19 – Connection of equipment for hum modulation measurement (AC method) |
| 49 | Figure 20 – Signal D2 for 625-line system Figure 21 – Arrangement of test equipment for measurement of echo rating |
| 50 | Figure 22 – Example of the modified staircase waveform Figure 23 – Arrangement of test equipment for measurement of differential gain and phase |
| 51 | Figure 24 – Arrangement of test equipment for carrier-to-noise ratio measurement |
| 52 | Figure 25 – Echo rating graticule |
| 53 | Annex A (normative) Calibration of modulation depth A.1 Equipment required A.2 Connection of the equipment A.3 Calibration procedure |
| 54 | Annex B (normative) Equipment required — Additional items B.1 Measuring receiver preamplifier B.2 Measuring receiver input filter Annex C (normative) Preliminary checks on the measuring equipment for carrier to noise ratio C.1 Noise C.2 Intermodulation C.3 Overload Annex D (normative) Correction factors D.1 Level correction factor |
| 55 | D.2 Bandwidth correction factor Annex E (normative) Calibration of the measuring receiver Annex F (informative) Bibliography |
| 56 | Annex G (informative) A-deviations |
| 57 | Figure G.1 – Mask group delay characteristic for PAL signals with FM-FM sound Figure G.2 – Template for the B, G, H, I, L standards RF protection ratio |
| 58 | Figure G.3 – Requirement to echo-loss in relation to the time delay of the reflected signal Table G.1 – Test carrier frequencies for CTB measurement |
| 59 | Annex H (normative) Correction factors for noise H.1 Signal level measurement H.2 Noise level measurement Table H.1 – Noise correction factor |
| 60 | Figure H.1 Annex J (informative) Digital signal level and bandwidth J.1 RF/IF power (“carrier”) |
| 61 | J.2 Bandwidth of a digital signal |
| 62 | Table J.1 – Examples of bandwidth for digital modulation techniques Annex K (informative) Power density method |
