Sennheiser Digital 9000, Instruction Manual

Page: 83 / 130

Digital 9000 | 81
Using the EM 9046
“RF mode” – Adjusting the transmission mode
The “ RF mode ” menu item allows you to adjust the transmission mode:
“ HD (High Definition) ”: Transmission of an audio signal without audio data
compression. As a result, the audio signal remains pure and unadulterated.
In “
HD ” transmission mode, the range can be restricted compared to “ LR ”
transmission mode.
“ LR (Long Range) ”: Transmission of an audio signal whose bit rate is
reduced – before transmission – by an audio data compression technique
(SeDAC, Sennheiser Digital Audio Codec). This compression technique pro-
vides excellent audio quality and a large transmission range. The sensitiv-
ity to interference is reduced compared to “
HD ” transmission mode.
The selection of the transmission mode depends on the result of the fre-
quency scan. For more information, refer to the chapter “Frequency scan”
– Performing a frequency scan of all 8 frequency ranges from page 56
onwards.
“Gain” – Adjusting the input gain
The “ Gain ” menu item allows you to adjust the input gain of selected chan-
nels, independent of whether the transmitter to be synchronized supports
the adjusted value. The factory preset is
−
6 dB. The adjustment range is
from
−
6 dB to
+
60 dB.
After synchronization with the transmitter, the value actually adopted by
the transmitter is written back to the menu item.
“Low cut” – Setting the low-cut filter
Via the “ Low cut ” menu item, you can set the transmitter’s low-cut filter.
Possible settings: 30 Hz to 120 Hz.
You can adjust this setting independent of whether the transmitter to be
synchronized supports the adjusted value.
If you select “ line ” in the “ Cable ” menu item (see page 82), the input
gain in the “ Gain ” menu item is set to the fixed value of –6 dB.
HD (high definition)
rf mode
dB 0
gain
low cut
Hz 30