Sennheiser Wireless Digital Instructions for Use - Page 14

6 Troubleshooting Ǡ The transmission fails completely Short-period switching off and back on again the EM 1090 DIGITAL receiver may lead to an interrupt in transmission. After having switched off the receiver hang on for a couple of seconds before switching on again as with any processor-controlled device. Ǡ The transmission range is not sufficient Use remote antennas. You can connect two additional A 1090 DIGITAL antennas to the EM 1090 DIGITAL receiver. The remote antennas can be installed at a distance of up to 30 meters from the receiver. Ǡ You can hear crackling noise and - occasionally - another transmitter is being received A second DIGITAL transmitter is operating on the same transmission frequency. In contrast to analog audio transmission, both transmitters are received simultaneously. If the field strengths of both transmitters are almost similar, the receiver switches to and fro between the two transmitters - crackling noise occurs - and possibly, the "DATA"- LED goes off. Choose a different transmission channel. Ǡ You can hear "crosstalk" Observe a minimum distance of 3 meters between transmitter and receiver. Ǡ Crackling noise and dropouts occur during the operation with a clip-on microphone The jack plug from the microphone cable is not screwed tightly to the SK 1093 DIGITAL. Lock the jack plug by screwing down the locking ring. Ǡ Before deciding on a transmission channel, test - with the receiver only - whether the chosen channel is free. Switch on the receiver and listen to the channel. When you are sure that no one else is occupying this channel, you can set the radiomicrophone to the same frequency. 7 Installation in a 19" rack Slide the supplied rack mount adapters and two receivers together as illustrated. The receivers can now be bolted into the rack. Instead of a second EM 1090 DIGITAL receiver you can also use a GA 1031 CC blank module or a GA 1031 AM antenna mount. 14