TL Audio 5052 - Manual (Page 11)

Unbalanced outputs:
- Screen = Ground,
- Tip = Signal Phase (“+” or “hot”),
- Ring = Ground.
3.9 Nominal Operating Level.
A switch on the rear panel allows the line inputs to be matched to equipment at a
nominal operating level of +4dBu or -10dBu for unbalanced signals, and +18dBu or
+4dBu for balanced signals. Most professional equipment requires +4dBu
(approximately 1.2V rms), but some small mixing consoles, portable tape recorders or
domestic audio equipment require -10dBu (approximately 225mV rms). Digital
multitrack recorders have very high signal levels due to the digital scale of 0dBFS
usually matching +18dBu in the analogue domain. The 5052 is able to match the
operating level of such recorders, using the +18dBu setting. If the operating level is
not known, the switch should be set to the position which results in the best signal to
noise ratio and least noise while being able to handle high signal levels.
3.10 Ventilation.
The 5052 generates a small amount of heat internally, mainly due to the valve heater.
This heat should be allowed to dissipate by convection through the side grills, which
must not be obstructed. Do not locate the 5052 where it will be subject to external
heating, for example, in the hot air flow from a power amplifier or on a radiator.
3.11 Rear Panel.
The rear panel connectors are identified in Fig.3. Make sure that all settings, mains
and audio connections have been made as described above before attempting to
operate the equipment.