Establishing A Transmission Path - IMG STAGELINE TXS-920 Manual De Instrucciones

8 Establishing a
Transmission Path
To establish the transmission path for a system
consisting of a receiver section and a trans­
mitter, proceed as follows:
1) Set the transmission channel on the re­
ceiver section ( ☞ chapter 7) . Do not
switch on the corresponding transmitter
yet . If the bargraph RF (H) on the display
indicates a signal, interference or signals
from another wireless system are received .
In this case, use a different transmission
channel .
2) Set the receiver section and the transmit­
ter to the same transmission channel: To
synchronize the receiver section and
the transmitter, first keep the blue syn­
chronization button pressed on the trans­
mitter: "SYNC" (D) starts flashing on the
display of the receiver section . Then, while
still keeping the synchronization button
pressed on the transmitter, briefly press the
button SYNC (3) on the receiver section .
Thus, the transmitter is set to the trans­
mission channel of the receiver section .
When synchronizing, make sure that the
maximum distance of 1 m between the re­
ceiver and the transmitter is not exceeded .
3) When the receiver section and the trans­
mitter have been set to the same trans­
mission channel, the bargraph RF on the
display will indicate the strength of the
radio signal received .
Take the transmitter and walk around
the area where it is operated . In case of no
reception or poor reception, please check
the following items:
a) Are the batteries of the transmitter dis­
charged?
b) Are there any metal objects or other
high­frequency sources interfering with
the reception?
c) Is it possible to improve the reception
quality by turning the receiving anten­
nas?
d) Are the receiver and the transmitter too
far apart? The transmission range de­
442 radio frequencies
➊
Channel Frequency Channel
001 823 .000 MHz 362 863 .000 MHz
002 823 .025 MHz 363 863 .025 MHz
003 823 .050 MHz 364 863 .050 MHz
004 823 .075 MHz 365 863 .075 MHz
005 823 .100 MHz 366 863 .100 MHz
... ... ...
360 831 .975 MHz 441 864 .975 MHz
361 832 .000 MHz 442 865 .000 MHz
pends on local conditions (up to approx .
100 m in the open) . The transmission
path should be free of any obstacles .
e) Is the squelch too high (
4) Switch on the subsequent audio unit or
raise the corresponding control of the
mixer and speak / sing into the microphone
of the transmitter . The bargraph AF (I) on
the display of the receiver section indicates
the volume level of the transmitter . For the
pocket transmitter, use the gain switch to
adjust the level (
Use the volume control (6) to adjust
the output level of the receiver section .
The signal of the receiver section is present
at the corresponding outputs AUDIO OUT
(10) . This signal, mixed to the signal of the
other receiver section, is also present at the
common output MIX OUT (8) .
8.1 Squelch
To adjust the squelch threshold, use the con­
trol SQ (12) . The squelch function will mute
the receiver section when the level of the
radio signal received falls below the thresh­
old value ad justed . Thus, interference signals
will not cause any noise at the receiver section
when the transmitter is switched off or when
the radio signal of the transmitter is insuffi­
cient: If the levels of the interference signals
are below the threshold value, the receiver
section will be muted .
Use the control SQ to adjust the threshold
value so that there will not be any noise at
the receiver section when the transmitter is
switched off . The more the control is turned
clockwise, the higher the threshold value . A
high threshold value will offer high interfer­
ence resistance, but it will also reduce the
transmission range of the wireless system
since, during operation, the strength of the
transmitter signal must be high enough to
prevent muting of the receiver section . Thus,
when the reception is good, a high threshold
value can be used; however, when the trans­
mitter and the receiver are far apart, a low
threshold value is recommended .
Mode PRESET
➋
Channel number
Frequency
in the group
1
2
3
4
5
... 6
7
8
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may be reproduced in any form or by any means for any commercial use.
chapter 8 .1)?
☞
☞ manual TXS­900HSE) .
Group 1 ("P1") Group 2 ("P2")
Channel Frequency Channel
006 823 .125 MHz 022 823 .525 MHz
058 824 .425 MHz 070 824 .725 MHz
138 826 .425 MHz 102 825 .525 MHz
260 829 .475 MHz 174 827 .325 MHz
330 831 .225 MHz 270 829 .725 MHz
356 831 .875 MHz 294 830 .325 MHz
373 863 .275 MHz 383 863 .525 MHz
391 863 .725 MHz 423 864 .525 MHz
® INTERNATIONAL GmbH & Co. KG. No part of this instruction manual
9 Specifications
Radio frequency range: � � � � 823 – 832 MHz and
RF S / N ratio: � � � � � � � � � � � � > 100 dB
Audio frequency range: � � � � 80 – 18 000 Hz
Dynamic range: � � � � � � � � � � > 100 dB
THD: � � � � � � � � � � � � � � � � � � < 1 %
Interference suppression: � � � pilot tone and
Audio outputs CH 1, CH 2
XLR, bal�: � � � � � � � � � � � � � 15 mV (MIC)
6�3 mm jack, unbal� � � � � � � 7 mV (MIC)
Audio output MIX OUT: � � � � 75 mV,
Antenna inputs: � � � � � � � � � � BNC, each to
Power supply: � � � � � � � � � � � via power supply unit
Ambient temperature: � � � � � 0 – 40 °C
Dimensions (W × H × D): � � � 420 × 42 × 183 mm
Weight: � � � � � � � � � � � � � � � � 2�3 kg
Group 3 ("P3")
Frequency Channel Frequency
034 823 .825 MHz
106 825 .625 MHz
154 826 .825 MHz
242 829 .025 MHz
322 831 .025 MHz
365 863 .075 MHz
405 864 .075 MHz
429 864 .675 MHz
Subject to technical modification .
863 – 865 MHz
table ➊
☞
adjustable squelch
150 mV (LINE)
75 mV (LINE)
6�3 mm jack, unbal�
supply an antenna
amplifier with power
(8 V⎓ / 100 mA)
provided and con-
nected to 230 V/ 50 Hz
Group 4 ("P4")
Channel Frequency
048 824 .175 MHz
146 826 .625 MHz
208 828 .175 MHz
234 828 .825 MHz
314 830 .825 MHz
358 831 .925 MHz
367 863 .125 MHz
437 864 .875 MHz
9