Dolby LM100 Broadcast Loudness Meter User's Manual

Introduction
1.1 LM100 Front and Rear Panels
The front panel includes:
• Controls to easily select the input source, program, and/or individual channels for
measurement
• Dedicated controls to pause and reset the measurement function
• LEDs that indicate fault, error, and audio alarm conditions
• A headphone jack with volume control
For detailed information on the LM100 front panel, see Chapter 3.
The rear panel provides the following:
• AES3 digital input connectors with loop‐through
• Two balanced analog inputs on combination XLR/quarter‐inch TRS connectors
• A pair of RCA connectors for confidence and signal‐presence monitoring of the
selected source
• GPI/O status and alarm connectors
For detailed information on the LM100 rear panel, see Chapter 2
Note:
The LM100 front‐ and rear‐panel serial interfaces provide for the Dolby remote
software, other remote control, status logging, and a means for updating firmware.
1.2 LM100 Configurations
The unit is available in the following two configurations:
• The LM100‐LTC includes a linear timecode input that allows signal‐condition alarm
events to be logged against an external timecode (LTC) input.
• The LM100‐NTSC includes an RF input specifically for CATV and NTSC off‐air
television measurement applications. The RF tuner also includes a composite video
output. The RF input replaces the timecode input, therefore logging in this version is
referenced to the internal clock.
2 Dolby ® LM100 Broadcast Loudness Meter User’s Manual