Spectronic Denmark A S INCA-TXHA INCA TXFH-RC Wireless Audio Transmitter User Manual TXFH RC userguide 1015QKE

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Document ID	590673
Application ID	YP/za37iYYUOcr5IoxyS9A==
Document Description	User Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	201.31kB (2516323 bits)
Date Submitted	2005-10-12 00:00:00
Date Available	2005-12-16 00:00:00
Creation Date	2005-10-10 15:01:47
Producing Software	AFPL Ghostscript 8.50
Document Lastmod	2005-10-10 15:01:47
Document Title	TXFH_RC_userguide_1015QKE
Document Creator	PDFCreator Version 0.8.1
Document Author:	jhe

Spectronic Denmark A/S
Skindbjergvej 44
DK-8500 Grenaa
Telephone: +45 86 38 72 22
Fax: +45 86 38 77 04
www.spectronic-denmark.com
sales@spectronic-denmark.com
INCA TXFH-RC
WIRELESS AUDIO TRANSMITTER
Version 1.02
COMPANY CONFIDENTIAL
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Table of contents
1 INCA TXFH-RC WIRELESS AUDIO TRANSMITTER.............................. 4
1.1
Introduction....................................................................................... 4
1.2
System Concept ............................................................................... 5
1.2.1
General ..................................................................................... 5
1.2.2
Different settings ....................................................................... 5
1.2.3
Application Note ........................................................................ 6
1.2.4
Wire connection ........................................................................ 7
1.2.5
Transmitter ................................................................................ 7
1.2.6
Remote Control Receiver.......................................................... 7
1.2.7
Remote Control Upcodes – TXFH-RC VHF ............................. 8
1.3
Technical specifications ................................................................... 9
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Transmitters
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1
INCA TXFH-RC WIRELESS AUDIO TRANSMITTER
1.1
Introduction
This document describes the general functions and performance of the
Spectronic INCA TXFH-RC transmitter.
Information on items of a specific delivery is to be found in a separate
document, stating TX frequencies and remote control address codes of the
individual units.
Antenna
Microphone
DC Supply
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1.2
1.2.1
System Concept
General
The INCA TXFH-RC is a series of wireless audio, remote controllable, small
sized VHF transmitters intended for concealed room monitoring etc.
The TX unit comes with flying leads for the battery connection and the
antenna terminal has a female MMCX-connector. The TX unit is deliverable
with external microphone.
Note: The special functions/upcodes will only be available, if using an
X-IDER 4096 TX. Please refer to Section on Remote Control Upcodes –
TXFH-RC VHF.
1.2.2
Different settings
Sleep mode on / off: The transmitters can be switched into sleep-mode. In
sleep-mode, the current consumption is only app. 200 uA, which maximizes
the lifetime of the battery more than 1000 times.
In sleep-mode the receiver only goes on the air in app. 30 msec. for every
2.5 seconds to look for a valid code transmission
VOX mode on / off: At the expense of a little higher current consumption
(app. 300 uA), the transmitter can be switched into VOX-mode, meaning that
the transmitter will run only when the microphone hear acoustic signals like
talking or music. This VOX is an advanced type of circuit that has the ability
to distinguish voice from background noise and the power circuit is only
switched on when a voice signal is present. Therefore, the switching
operation is highly reliable in noisy environments.
AGC on / off: is integrated in the transmitter. The AGC action prevents
over-modulation at high sound levels and makes it possible to listen to very
weak conversation at the same time.
Scrambler on / off: The transmitter includes an audio scrambler-circuit,
which can be switched on and off by the remote control.
The scrambler has been added for greater security, and to avoid listening in
by unauthorized persons. It is based on simple frequency-inversion
techniques due to the very low power needed for that sort of circuit.
In the scramble mode, the audio frequency response, as well as the signal to
noise ratio, are somewhat minimized compared to the un-scrambled mode.
Changing channels: It is possible to shift between 4 channels by the
remote control. The 4 channels (frequencies) are pre-programmed in the
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transmitter. During operation, it is possible to shift channel in order to use the
optimal channel (frequency).
Output Power:
The transmitter has two power levels, which can be selected by the X-ider
remote control. The output power in high mode is 1W for the VHF version. In
low power mode both versions will deliver approx. 300mW into 50 ohms. The
supply voltage can be varied in the range from 3.3 to 15 V DC. In the low
power mode the output power will be constant in the full supply voltage
range, whereas in the high power mode the output power will begin to
decrease at 4.75V input voltage and will be approx. halved at 3.3V. Because
of the build-in switch-mode regulator the current consumption will increase
as the input voltage is lowered.
1.2.3
Application Note
To achieve maximum RF range it is advisable to keep the antenna as far
away from the surroundings as possible. If an antenna is in close proximity
to metal surfaces or concrete walls, the efficiency of the transmitter will be
minimized due to power absorption and disturbance of the antenna radiation
pattern.
For maximum battery lifetime and for minimizing the risk of being found by
bug detectors or scanners, the transmitter can be switched off into sleepmode by means of the remote control. Alternatively, simply choose VOX
mode, when in doubt whether persons will be present in the room being
monitored. The TX will then only go “on the air” every time conversation is
detected in the room. After app. 15 sec. without conversation, the TX will go
to sleep again and thus sawing battery power.
Please note that because the transmitter is a very small high-power device,
the housing is becoming hot under normal application conditions (up to 60
degrees centigrade). Therefore don’t wrap the transmitter into isolation
materials and always be sure that the transmitter can get rid of its heat
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1.2.4
Wire connection
Antenna
Mic
White
TXFH-RC
Battery or
mains
module
( MMM )
Red: VCC
Black: GND
1.2.5
Transmitter
During off state, the transmitter is completely switched off, and as the remote
receiver does not contain a local oscillator, as would normally be the case,
when using a heterodyne receiver, everything is totally quiet and nothing can
be found by e.g. spectrum analyzers or scanners.
For minimum current consumption, analogue frequency modulation with an
audio bandwidth of 100 - 5000 Hz (unscrambled mode) has been chosen.
1.2.6
Remote Control Receiver
The remote-receiver is realized by a very small and sensitive hybrid IC,
intended for unlicensed low-power remote control. The carrier frequency is
OOK (on off keyed) modulated and the system provides up to 4096 different
address codes. The Spectronic X-IDER remote-control transmitter is used to
send the different codes for setting up the TX.
The Address Code of the Remote Control is factory set, according to
customer specifications, or as specified for standard frequencies by
Spectronic.
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1.2.7
Remote Control Upcodes – TXFH-RC VHF
X-IDER left-hand HEX switch
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TX on
TX off (factory default)
AGC on (factory default)
AGC off
TX audio scrambler on
TX audio scrambler off (factory default)
Channel 1 (factory default)
Channel 2
Channel 3
Channel 4
VOX on
VOX off (factory default)
Low power
High power (factory default)
NTIA Compliant on
NTIA Compliant off (factory default)
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1.3
Technical specifications
Technical specifications
Transmitter
Output frequency range VHF
Min. channel raster 12.5 kHz
Output power, VHF (Vbatt. = 3.3 to 15 V)
150-174 MHz
typ. 1000 mW into 50 Ω load (high power)
typ. 250 mW into 50 Ω load (low power)
NOTE: In high-power mode the output power
decreases for input voltages below 4.75 V
Frequency stability
Max. deviation (FM)
Spurious & harmonics
± 2.5 ppm
± 2.5 kHz
< -60 dBc non-harmonic
< -50 dBc harmonic
100 Hz to 5 kHz, -3 dB
100 Hz to 3 kHz, -3 dB
280 Hz to 4 kHz, -3 dB
45 dB
3.3 V-15.0 V
AA, AAA, C123 Lithium or
Lithium Ion rechargeable
Frequency response, unscrambled
NTIA frequency response, unscrambled
Frequency response, scrambled
Audio amplifier AGC range
Supply voltage
Battery types
Current consumption VHF:
Vbatt. = 4.75-15 V (output power = high power)
Vbatt. = 3.3-15 V (output power = low power)
Current consumption, sleep mode
Current consumption, VOX-mode (silent room)
Operating temp. range
Dimensions HxWxD
435-215 mA DC
225-95 mA DC
< 200 µA DC
< 300 µA DC
-20º C to 60º C / -4 F to 140 F
53x23x7.5 mm / 2.1x0.91x0.295 inches
Remote control receiver
Remote control frequency (standard)
Sensitivity
Modulation
Coding addresses
433.92 MHz
<-90 dBm
OOK
4096
Required accessory for operation
The TXFH-RC transmitter requires the handheld X-IDER remote control transmitter module for
maximum flexibility and functionality.
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Create Date                     : 2005:10:10 15:01:47+02:00
Modify Date                     : 2005:10:10 15:01:47+02:00
Title                           : TXFH_RC_userguide_1015QKE
Creator                         : PDFCreator Version 0.8.1
Author                          : jhe

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