PAM1-3G8 Version 7
1.0 Introduction
The PAM1-3G8 is a 1RU x 320mm deep Audio Monitoring Unit with two OLED displays for audio
level measurement and metadata status indication.
The following features are standard:
Dual auto-sensing, 1080p (60, 59, 94 and 50Hz), HD/SDI video inputs
De-embedded audio monitoring from video (HD/SDI) with intuitive selection from up to sixteen
channels (four groups)
ITU BS1770/71 loudness indication (Q2 2010)
Dolby E and D decoding from HD.SDI signal sources
Video confidence monitoring
Re-clocked HD/SDI with down converted SDI or composite (PAL.NTSC) video outputs selected via
rear panel Config. Switch.
Dual high resolution OLED screens for 8 bargraphs, setup and metadata display.
Choice of user selectable bargraph scales (BBC PPM, EBU PPM, EBU Digital, Nordic and DIN)
User programmable presets. 3 by hardware buttons, 4 GPI and 12 internal, accessible by high level
menu selection
Fixed or variable analogue multichannel outputs (8 mono)
Fixed or variable AES multichannel outputs (4pairs)
Variable stereo analogue outputs
High quality internal full range loudspeaker system
Dual 12V DC inputs
Serial remote control
Headphone output with LS muting
Compact, lightweight (3.6 Kg) 1RU case, 320mm deep
The TSL PAM1-3G8 offers the best sound quality and level ever obtained from a 1U box. It does
this because the sonic properties have received the same attention to detail as the rest of the unit.
The PAM1-3G8 has a custom-designed woofer of extremely slim construction, despite which it
out-performs many drive units built with no such constraint. The large aluminium voice coil and
rare earth magnets make the unit relatively efficient and combined with the switched-mode
amplifiers a remarkable sound pressure and wide frequency response can be obtained without
excessive power dissipation. As a result of the efficiency, traditional techniques such as reflex
ports are not needed, and the timing and phase errors these cause are eliminated.
The sound quality could easily be compromised if the enclosure were allowed to resonate. In the
PAM1-3G8 the enclosure was designed from the outset to damp unwanted vibrations. Even the
grill material was selected for the most transparent sonics. It is the same material that is used to
protect many of the world‟s finest microphones.
In traditional loudspeakers, the crossover is responsible for a lot of quality loss. A crossover should
produce a pair of signals which, if added back together, should recreate the original input. In most
loudspeakers, this doesn‟t happen, whereas in all of TSL‟s active speakers that performance is
standard. In the PAM1-3G8 the crossover is performed in the digital domain and the accuracy
obtained contributes to the smooth sound and fatigue-free listening characteristics.
John Watkinson, February 2009