11-24-0000
SYNTHESIZED
UHF TRANSMITTER
Operator’s
Manual
Sea Air and Land Communications Ltd, 120 St Asaph Street, Christchurch, New Zealand
11-24-0000 SYNTHESIZED DATA TRANSMITTER Issue 1124UA 11-24-0000 SYNTHESIZED DATA TRANSMITTER Issue 1124UA
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11-24 SYNTHESIZED UHF TRANSMITTER
OPERATOR’S MANUAL
1.0 DESCRIPTION: The Salcom 11-24 is a 1.5w UHF narrow band FM Transmitter using
±5kHz deviation on the UHF 25kHz channel spacing Bands, 406-430 MHz & 450- Pin 2,4,10 Channel change -see chart.
475MHz and is the companion transmitter to the 11-23 UHF FM Synthesized Receiver.
The 11-24 is supplied tuned to the requested frequency. A two pin power connector and
a 15 pin `D' range plug and cover are provided standard with the transmitter. A power
supply and a range of aerials are available. Discuss this with your supplier.
2.0 OPTIONS: Special options are available and can be ordered with the 11-24 or retro-
fitted by your supplier:-
! 600O balanced input when T1 fitted.
! Transmitter output power adjustable 50mW - 1.5W
! Multi-channels available, talk with your supplier.
! Frequency control via I²C or RS232 input is possible utilizing an external
processor on other equipment.
3.0 SETUP INSTRUCTIONS
3.1 Deviation on data source: When transmitting a constant level tone from a
modem or tone encoder use TX1 input (Comms connector pin3) and set the line
level to ±4kHz deviation with the modulating source (i.e. modem idle tone) with
RV4.
3.2 Deviation on speech source: If an uncompressed varying level modulation (i.e.
speech) is being transmitted, then the TX2 input (Comms connector pin9) can
be used. Set RV3 for ±3kHz deviation when transmitting lowest input level.
Important: The 11-24 adjustments have been factory set to ensure that it will comply
with specified emission standards and controls other than RV3 & RV4 should not be
touched.
4.0 INSTALLATION: A screwdriver to connect the power socket, and a soldering iron to
connect the D15 communications plug and the aerial, are required for the installation
procedure.
4.1 Connections
Aerial Socket Connects to a BNC plug, 50 ohm coax and half-wave dipole or yagi
aerial.
Power Plug Connects to + and -13.5V. The positive connection is nearer to the D15
P2 Communication Socket.
Comms
Socket S1
Pin 1 Earth connection.
Pin 3 TX1 input, 10KO unbal. level adjustable via RV4.
Pin 5 PTT. Earth to initiate a transmission.
Pin 6 Transmit Data. RS232 format, 0-5v logic
Pin 7 External Power Control.
Pin 8,15 +Ve available for auxilliary cct.
Pin 9 TX2 Input. 10KO unbal. 5mV - 5V, deviation adjustable
Pin 11,12 600 ohm balanced input when T1 fitted, level adjustable
Pin 13 No connection
Pin 14 Receive Data. RS232 format, 0-5v logic
via RV3.
via RV3 or RV4. Link JU1 to select Tx1 or Tx2 input.
5.0 OUTPUT: The transmitter can be operated continuously provided that the supply voltage
is limited to 13.5 volts. It is critical that the aerial is OK and the VSWR is below 2.0.
6.0 OPERATING REQUIREMENTS:
! Supply voltage: +13.5V (12V nominal)
! Operating temperature range: -10EC to +60EC
! Mount in a dry position away from loud noise or vibration
7.0 LED INDICATORS: Two indicator LED's are visible on the top of the case.
(1) Green Power LED shows power is present at the 11-24.
(2) Red Tx LED lights when the 11-24 is transmitting.
8.0 REPROGRAMMING The 11-24 can be re-programmed by a supplier with the
appropriate programming facilities to another frequency in the same band.
9.0 MOUNTING: Mount the case using the two holes provided in the lid and clip the 11-24
into position on the lid. Secure with the two self tappers to make positive electrical contact
between the case and lid and prevent RF recirculation.
11-24-0000 SYNTHESIZED DATA TRANSMITTER Issue 1124UA 11-24-0000 SYNTHESIZED DATA TRANSMITTER Issue 1124UA
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10.0 WARRANTY: Our Products are warranted for a period of 12 months from date of
purchase against faulty materials and workmanship. Should any fault occur the unit should
be returned to the Vendor, freight pre-paid. Please include a brief description of the fault
to assist with prompt return. Unauthorized alterations or repairs will invalidate the warranty.
10.0 DISCLAIMER: All information provided in this document is carefully prepared and
offered in good faith as a guide in the installation, use and servicing of our products.
Installers must ensure that the final installation operates satisfactorily within the relevant
regulatory requirements. We accept no responsibility for incorrect installation. We reserve
the right to change products, specifications, and installation data at any time, without notice.
SPECIFICATIONS
Frequency Bands
406-430 & 450-475MHz, * 470-494, 12.5kHz
1
channel spacing
Type of Emission
FM ±5kHz (* ± 2.5kHz) deviation
1
25kHz (* 12.5kHz) channel spacing
1
Power Output 50mW to 1.5W variable
Power Requirements Transmit: 400mA max. 13.5V
13.5V nominal, operates 10V to 15.5V
Standby: 3mA (LED current)
Modulation
Deviation: ±5kHz (* ± 2.5kHz) max.
1
Sensitivity: TX1 30mV/10K
TX2 5mV/10K
CTCSS 300mV/2MO
Passband: TX1,2 0.3-3kHz
CTCSS 67-250Hz
Optional: 600O bal. TX1,TX2
Oscillator Crystal 9.6MHz
Stability ±5ppm (* ± 2ppm) , -10EC to 60EC
1
Synthesizer Lockup 50mSec
No of Channels 100 pre-programmable within 6MHz B/W
Spurious Outputs -26dBm max.
Overtemp Protection 70EC Transmitter Output
Transmit Enable Ground `PTT', 5mA source
Type Acceptances RFS36, ECR235
Case Dimensions 140 x 106 x 32mm
Table 1:Switch settings table 00 to 49
11-24-0000 SYNTHESIZED DATA TRANSMITTER Issue 1124UA 11-24-0000 SYNTHESIZED DATA TRANSMITTER Issue 1124UA
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Table 2: Switch settings table 50 to 99 Visit us at www.salcom.co.nz
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