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22 Safety instructions
̈ Never open electronic devices! This must only be done by
authorised personnel and is all the more important for current-
carrying units.
̈ As far as possible, use your SKM 3072-U in dry rooms only. When
you are using the SKM 3072-U outside, it must be protected against
direct moisture. In outdoor applications, always use a windshield.
̈ Use a damp cloth for cleaning your SKM 3072-U. Do not use any
solvents.
23 Technical Data / Dimensions
RF output power typ. 30 mW
Transmission frequencies 1- 32
Frequency range 470 - 960 MHz
Frequency preparation PLL synthesizer
Max. switching bandwidth 32 MHz
Frequency deviation ≤ 10 kHz
Spurious emission ≤ 4 nW
Modulation/pre-emphasis wideband FM/50 µs
Nominal/peak deviation (1kHz) ± 40 kHz/± 56 kHz
Noise reduction system HiDyn
plus
™
AF frequency response 80 - 18,000 Hz
Signal-to-noise ratio 110 dB(A)
THD (1 kHz/nom. dev.) ≤ 0.3 %
Sensitivity adjustable in 4 steps of 10 dB
Max. sound pressure level 154 dB SPL (ME 3005 E)
Power supply 9 V alkaline, IEC 6 LR 61
(or rechargeable accupack)
Power consumption
at nominal voltage approx. 50 mA
Operating time
with alkaline battery approx. 8 h
with rechargeable battery approx. 2 h
Dimensions in mm 255 x 50
Weight incl. battery approx. 350 g
Supply schedule SKM 3072-U 1 SKM 3072-U hand-held
transmitter with ME 3005 e
mic head
1 9 V PP3 battery
1 MZQ stand adaptor
8 colour-coded protection caps
1 storage case
1 operating instructions
Supply schedule SKM 3072-U-x 1 SKM 3072-U hand-held
transmitter with ME 3005
mic head
1 9 V PP3 battery
1 MZQ stand adaptor
8 colour-coded protection caps
1 storage case
1 operating instructions
21 Error checklist
̈ Transmitter does not work:
Battery is flat, replace the battery! (u chapter 8), battery is not
inserted or inserted the wrong way round. Transmitter is defective
(=> send transmitter to a Sennheiser service department!).
̈ No transmission:
Receiver or transmitter are not switched on or transmission
frequency does not agree with receiving frequency.
̈ Short hissing noise or short interruption:
Position of receiving antennæ is unfavourable. Make sure that there
is a “free line of sight” between the transmitter and the antennæ.
̈ Microphone gain too low / microphone overmodulated :
Sensitivity adjusted too low / too high
(=> adjust sensitivity! u chapter 15).
̈ After switch-on, the display first indicates “3072-U“ and then
“LoBAt”,the transmitter switches off:
Remaining battery capacity is not sufficient for operation
(=> replace battery! u chapter 8).
̈ Transmitter switches off during operation:
After “LoBAt” – alternating with the display for frequency/channel
number – has been shown for a certain amount of time, the battery
has become completely flat, the transmitter has switched off
(=> replace battery! u chapter 8).
̈ Transmitter cannot be switched off:
“Lock mode” function is activated. “Loc” is briefly indicated on
the display (=> deactivate “lock mode“ function! u chapter 18).
̈ Transmitter cannot be switched to “CHxxx”:
No channel number is entered, “CH---” is briefly indicated,
transmitter switches back to frequency display (=> enter a channel
number! u chapter 17).
̈ Strong twittering:
Two transmitters operate on the same frequency, the preselected
frequency is subject to interference (=> change the transmission
and receiving frequency! u chapter 16).