16
Installation
Start-up procedure
1. Disconnect all input and output connections.
2. Each loop must be securely isolated (particularly to safety-ground and other loop
connections). Verify the resistance of each loop (approximately 1-3 Ohm).
3. Set all level controls to minimum setting:
• System Diagnostics (5) = Off (switch to left position)
• Parametric MLC (4) = 2kHz (switch to right position)
4. Connect the loop cable to the loop drivers screwterminal (11) according to the figure 3.
5. Connect the power supply (12) and verify Power LED indication (10).
6. Activate System Diagnostics function (5) by sliding the switch to the right. Input level
bar graph peaks (2) to 0dB. Output level bar graph (7) does not indicate.
7. Adjust the loop current output level (6). Output level bar graph (7)indicates, 1, 2, 3 or 4
depending on the adjusted current level.
8. Set the current level to achive a field strength of approximately -3dB in the center of
the loop.
9. Basic function of the loop system is now verified. Turn System Diagnostics off, by
sliding the switch to the left.
Input connection and adjustments
10. Set all level controls to minimum setting:
• System Diagnostic (5) = Off (switch to left position)
• Parametric MLC (4) = 2kHz (switch to right position)
11. Connect the main audio source to the amplifier's input.
12. Adjust input level (1) to 0dB (with maximum peaks to +12dB) at input bar graph (2).
If using a 1kHz pulsed sine wave signal, simply set to 0dB.
Output connection and adjustments
13. Field strength setting: Start with the highest efficiency connection:
2-turn serial connection, in junction box.
