User's Manual

AKG SPC 4 16/20
3.4.3 Wall/Ceiling Mounting
Fig. 4: Minimum distances from plane surfaces.
1. Mount the antenna at least 10 cm (4 in.) in front of and at a minimum
lateral distance of 50 cm (20 in.) from any walls or other plane surfaces,
metal grids, or metal scaffolding.
Fig. 5: Minimum distances from floor and ceiling.
2. Make sure the antenna will sit at least 15 cm (6 in.) above the floor or 50
cm (20 in.) from the ceiling (or 15 cm (6 in.) if you route the cable to the
antenna from above).
3.5 Wiring
Refer to fig. 8.
1. Connect the ANTENNA output on each transmitter to one of the INPUT
connectors on the antenna combiner.
Use the shortest possible RG58 antenna cables.
2. If several signals are radiated by a shared antenna, intermodulation of the
various carrier frequencies will cause spurious emissions.
To avoid technical and legal problems (official limits for RF output and
spurious emissions), set the RF OUTPUT level on each transmitter as
follows (also refer to the IVM 4 User Manual):
Transmitters Max. RF OUTPUT per transmitter
2 – 4 20 mW
≥4 10 mW
3. Connect the antenna to the ANTENNA OUT connector on the antenna
combiner.
3.6 Powering
To power the SPC 4 you can use either a suitable AC adapter or the optional
PSU 4000 central power supply.
3.6.1 Using an AC Adapter
Important!
• Do not use any AC adapter other than a type delivering an output
voltage of 12 VDC and an output current of 1.4 A or higher.
• Check that the AC mains voltage stated on your power supply is
identical to the AC mains voltage available where you will use your
system. Using the power supply with a different AC voltage may
cause irreparable damage to the unit.
• If you power the antenna combiner from a 12 VDC/1.4 A AC
adapter, make sure to power each transmitters from its own
(standard) power supply. Connecting the transmitters to the
antenna combiner without powering them from their own power
supplies may cause damage to the antenna combiner due to the
overload presented by the transmitters.