Dolby LM100 Broadcast Loudness Meter User's Manual

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Menus To recall a preset follow these steps: 1. Navigate to the Recall Preset menu. 2. Select a preset to recall, then press Enter. 4.4.5 System Log Use the System Log menu to control the characteristics of the internal system log. • Time Stamp Mode • Periodic Loudness • Metadata Log • Bitstream CRC Log • System OK Log • Track Measurement • Clear System Log Time Stamp Mode When using the LM100‐LTC with a valid timecode input, the system log can use either the time of day or linear timecode as the log entry time stamp. Use the Time Stamp Mode menu to change this setting. Periodic Loudness The system log can store the current measured loudness value at regular (that is, periodic) time intervals, as set in the Periodic Loudness menu. This allows you to use the LM100 to simultaneously track and log the changes in the loudness of programs or services over many hours or days. When the measurement type is ITU‐R BS.1770‐2, the periodic loudness also enters the loudness range measurement into the system log. When the measurement type is EBU R128, the periodic loudness also enters the momentary maximum loudness measurement in addition to the loudness range and measured loudness values. Note: When measuringwith the infinite method, additional settings appear in the Periodic Loudness menu, which enables the measurement to automatically reset at the same time interval as the periodic measurement itself logs. For example, if you select 30 Seconds with Reset, the LM100 generates a “periodic loudness” system log entry based on the integrated level for the past 30 seconds, and then resets the infinite measurement before continuing. Metadata Log When this is enabled, the metadata parameters shown below within a Dolby E or Dolby Digital bitstream are added to the system log. This is done whenever a Dolby E or Dolby Digital bitstream is first detected, and subsequently when any of these parameters change value: • Dolby Digital channel mode • Dolby Digital LFE channel • Dolby Digital data rate 36 Dolby ® LM100 Broadcast Loudness Meter User’s Manual
System Settings • Dolby Digital dialogue level • Dolby E program configuration • Dolby E bit depth • Dolby E frame rate • Dolby E Px channel mode • Dolby E Px LFE channel • Dolby E Px dialnorm Bitstream CRC Log When this is enabled, any CRC errors in Dolby E or Dolby Digital bitstreams are logged. You can use this log to monitor and ensure that Dolby Digital or Dolby E bitstreams are not corrupted and/or do not contain errors. System OK Log When this is enabled, a System OK message is logged at hourly intervals. You can use this log to verify the ongoing correct operation of the LM100 within the system log. Track Measurement You can control the system to follow the Reset and Pause controls provided on the front‐panel buttons or through the GPI/O port. When this is enabled, pressing the Reset button clears the system log and resets the measurement; pressing Pause stops new entries from generating in the system log as well as pausing the measurement. If you disable this setting, the Reset and Pause buttons have no effect on the system log. Clear System Log When this is enabled, you can manually delete all entries in the system log. 4.5 System Settings The System Settings menus allow you to configure several unit behaviors. • Remote Baud Rate • Remote Mode • Unit Name • Unit Address • Time/Date • Screensaver Timeout • True Peak Channel ID • Enable Dialogue & All Display Remote Baud Rate This setting controls the speed (baud rate) of the RS-232 and RS-485 serial ports. Dolby ® LM100 Broadcast Loudness Meter User’s Manual 37
Page 1 and 2: ® Dolby LM100 Broadcast Loudness M
Page 3 and 4: Regulatory Notices FCC NOTE: This e
Page 5 and 6: Fuses WARNING: Check that the corre
Page 7 and 8: Table of Contents Chapter 1: Introd
Page 9 and 10: List of Figures Figure 2-1 LM100-NT
Page 11 and 12: Chapter 1 Introduction This chapter
Page 13 and 14: Chapter 2 Getting Started This chap
Page 15 and 16: Getting Started Figure 2‐1 Analog
Page 17 and 18: Power 2.5 Power Warning: Before app
Page 19 and 20: Installing the Remote Software Use
Page 21: Installing the Remote Software Figu
Page 24 and 25: Front-Panel Controls incrementally.
Page 26 and 27: Front-Panel Controls Table 3-2 Erro
Page 28 and 29: Menus Figure 4‐1 Figure 4-1 Main
Page 30 and 31: Menus Figure 4‐8 Figure 4-8 Main
Page 32 and 33: Menus Figure 4‐10 Figure 4-10 Mai
Page 34 and 35: Menus If EBUis the selected measure
Page 36 and 37: Menus conditions are a loss of inpu
Page 38 and 39: Menus Short-Term Window Length When
Page 40 and 41: Menus Analog Input Calibration Use
Page 42 and 43: Menus Table 4-2 Input Clipping Alar
Page 44 and 45: Menus Table 4-6 dialnorm Threshold
Page 48 and 49: Menus Remote Mode When you select R
Page 50 and 51: Features • The main status screen
Page 52 and 53: Features Figure 5‐1 Figure 5-1 Li
Page 54 and 55: Features Figure 5‐2 :20 :19 :18 :
Page 56 and 57: Features The other selections are a
Page 58 and 59: Features In the System Log menu, to
Page 61 and 62: Appendix LM100 Specifications Core

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