In combination with a wireless microphone, the multi -
frequency receiver US-9001D / 5 makes up a wireless
audio transmission system which is ideally suited for
musicians and live performance on stage. The wire-
less transmission of music or speech to the audio
system ensures the musicianʼs freedom of movement
during the performance.
The True Diversity* receiver operates in the UHF
frequency range of 518 to 542 MHz. Within this range,
the frequency for the audio transmission can be
select ed as desired (frequency spacing 125 kHz).
The following transmitters from JTS can be used:
MH-950 / 5 (order no. 25.5470)
Hand-held microphone with multifrequency trans-
PT-950B / 5 (order no. 25.5500)
Multifrequency pocket transmitter with Lavalier
To increase the range and the interference immunity, it
is possible to use two antenna amplifiers UB-900B
(order no. 15.0260) available as accessories instead
of the antennas supplied. The amplifiers are supplied
with power via the antenna jacks of the receiver.
3.1 Rack mounting
For insertion into a rack for units of a width of 482 mm
(19") the holder DR-900SET (order no. 24.4770)
which is able to accept a maximum of two receivers is
avail able as an accessory. The holder requires a
height of 1 rack space (= 44.5 mm).
1) Insert the two supplied antennas (1) into the BNC
antenna jacks ANT. 1 and ANT. 2 (11) and put them
in a vertical position.
2) For connecting the subsequent unit (e. g. mixer) the
receiver is provided with two audio outputs:
AF OUTPUT BAL. (10) =
balanced XLR output, for connecting a balanced
AF OUTPUT UNBAL. (9) =
unbalanced 6.3 mm output jack, for connecting a
line input (a matching connection cable is sup-
plied with the unit)
If the subsequent unit is provided with a balanced
microphone input, the XLR output should be used
for an optimum signal transmission.
Make the corresponding connection to the sub-
sequent unit. Do not switch on the subsequent unit
or do not advance the corresponding fader on the
mixer before the microphone system has com -
pletely been switched on.
* True Diversity technique:
The transmission signal is received by two antennas and then
separately processed in two receiving parts. The better signal re -
spectively of the two receiving parts is sent to the outputs by the
3) Connect the supplied power supply unit to the jack
(8) for the power supply and the mains plug of the
power supply unit to a socket (230 V~ / 50 Hz).
1) Switch on the receiver with the POWER switch (2)
[keep the button pressed for approx. 1 s].
The frequency indication (i) in the display (3)
shows the reception frequency currently adjusted.
As long as the unit does not receive a radio signal
from the transmitter on the adjusted frequency, it is
muted [MUTE (h) is inserted]
2) Switch on the transmitter. If the transmitter and the
receiver have been adjusted to different frequen-
cies, adjust the receiver to the frequency of the
transmitter either manually or via the automatic fre-
quency scanning → see chapter 5.1.
If the transmitter and the receiver have been ad -
justed to the same frequency, the muting is deacti -
vated [MUTE (h) disappears]. One of the indications
(g) lights up to indicate which of the two sepa-
rate receiving parts of the unit respectively receives
the more powerful radio signal. The bar graph RF (c)
indicates the reception quality: the more segments
on the bar graph, the better the reception.
If the reception is too poor, check if
a the batteries of the transmitter are exhausted.
The battery symbol (d) in the display indicates
the current charging status of the batteries of the
b the distance between the transmitter and the
receiver is too long.
c the reception is disturbed by objects in the trans-
Transmitter and receiver should be placed at a
minimum distance of 50 cm from metal objects
and potential sources of interference, such as
e. g. motors or fluorescent tubes.
d the reception can be improved by turning the
Note: If the power of the radio signal falls below a
defined threshold value, the receiver will be muted.
This will prevent noise on the receiver in case of
interference with reception or when switching off
the transmitter. Then the display indicates MUTE
(h). The muting is deactivated as soon as the unit
receives a radio signal of sufficient power again.
3) Switch on the subsequent audio unit or advance
the corresponding fader on the mixer.
4) Speak/sing into the microphone. The volume level
of the audio signal received is shown via the bar
graph AF (b) and the indication PEAK (e):
The more segments of the indication AF are in -
serted, the higher the volume level. The indication
PEAK should only light up shortly with signal
peaks. If it lights up permanently, the level is too
high and distortions will occur.