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 transmit-
ter, proceed as follows:
1) Set the transmission channel on the receiver
section ( chapter 7). Do not switch on the
corresponding transmitter yet. If the bargraph
RF (H) on the display indicates a signal, inter-
ference or signals from another wireless sys-
tem are received. In this case, use a different
transmission channel.
2) Set the receiver section and the transmitter to
the same transmission channel: To synchro-
nize the receiver section and the transmit-
ter, first keep the blue synchronization button
pressed on the transmitter: "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
transmission channel of the receiver section.
When synchronizing, make sure that the
maximum distance of 1 m between the
receiver and the transmitter is not exceeded.
3) When the receiver section and the transmitter
have been set to the same transmission
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 recep-
tion or poor reception, please check the fol-
lowing items:
a) Are the batteries of the transmitter dis-
charged?
b) Are there any metal objects or other high-
frequency sources interfering with the
reception?
c) Is it possible to improve the reception qual-
ity by turning the receiving antennas?
d) Are the receiver and the transmitter too far
apart? The transmission range depends
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 (
–
442 radio frequencies
Channel Frequency Channel
001 823.000 MHz 362
002 823.025 MHz 363
003 823.050 MHz 364
004 823.075 MHz 365
005 823.100 MHz 366
... ... ...
360 831.975 MHz 441
361 832.000 MHz 442
4) Switch on the subsequent audio unit or raise
the corresponding control of the mixer and
speak / sing into the microphone of the trans-
mitter. The bargraph AF (I) on the display of
the receiver section indicates the volume
level of the transmitter. For the pocket trans-
mitter, use the gain switch to adjust the level
( manual TXS-900HSE).
Use the volume control (6) to adjust the
output level of the receiver section. The sig-
nal 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 com-
mon output MIX OUT (8).
8.1 Squelch
To adjust the squelch threshold, use the control
SQ (12). The squelch function will mute the
receiver section when the level of the radio sig-
nal received falls below the threshold value ad -
justed. Thus, interference signals will not cause
any noise at the receiver section when the trans-
mitter is switched off or when the radio signal of
the transmitter is insufficient: 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 interference 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 thresh-
old value can be used; however, when the trans-
mitter and the receiver are far apart, a low
threshold value is recommended.
chapter 8.1)?
—
Frequency
Channel
number
863.000 MHz
in the
863.025 MHz
Channel
group
863.050 MHz
1
863.075 MHz
2
863.100 MHz
3
...
4
864.975 MHz
5
865.000 MHz
6
7
8
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manual may be reproduced in any form or by any means for any commercial use.
Mode PRESET
Group 1 ("P1") Group 2 ("P2")
Frequency Channel Frequency
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
9 Specifications
Radio frequency range: . . 823 – 832 MHz and
863 – 865 MHz
RF S / N ratio: . . . . . . . . . . . > 100 dB
Audio frequency range: . . . 80 – 18 000 Hz
Dynamic range: . . . . . . . . . > 100 dB
THD: . . . . . . . . . . . . . . . . . < 1 %
Interference suppression: . pilot tone and
adjustable squelch
Audio outputs CH 1, CH 2
XLR, bal.: . . . . . . . . . . . 15 mV (MIC)
150 mV (LINE)
6.3 mm jack, unbal. . . . . 7 mV (MIC)
75 mV (LINE)
Audio output MIX OUT: . . . 75 mV,
6.3 mm jack, unbal.
Antenna inputs: . . . . . . . . . BNC, each to
supply an antenna
amplifier with power
(8 V /100 mA)
Power supply: . . . . . . . . . via power supply
unit provided and
connected to
230 V~ / 50 Hz
Ambient temperature: . . . . 0 – 40 °C
Dimensions (W × H × D): . 420 × 42 × 183 mm
Weight: . . . . . . . . . . . . . . . 2.3 kg
Group 3 ("P3") Group 4 ("P4")
Channel Frequency Channel
034 823.825 MHz 048
106 825.625 MHz 146
154 826.825 MHz 208
242 829.025 MHz 234
322 831.025 MHz 314
365 863.075 MHz 358
405 864.075 MHz 367
429 864.675 MHz 437
Subject to technical modification.
GB
–
table
Frequency
824.175 MHz
826.625 MHz
828.175 MHz
828.825 MHz
830.825 MHz
831.925 MHz
863.125 MHz
864.875 MHz
9