Thrane and Thrane A S SP3550 UHF Transceiver User Manual SP3550

Thrane & Thrane A/S UHF Transceiver SP3550

Contents

user manual part 2

Equipment and accessories
26
Accessories you may buy
Warning!
The display must always be kept away from the body to reduce the RF
exposure when body worn.
Accessory Part number
Dual Position Charger CH3508 403508A
Leather Case 403500-205
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Equipment and accessories
27
Attaching and removing the belt clip
To attach the belt clip, slide the belt clip upwards
into the rails at the back of the radio until it locks.
To remove the belt clip, press the projection at
the top of the belt clip to release the lock and
slide the belt clip downwards out of the rails.
Attaching the lanyard
Do as follows:
1. Take the lanyard through the
eye at the top of the radio.
2. Put one end of the lanyard
through the loop at the other
end of the lanyard and pull to
tighten.
Release lock
Top view
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Equipment and accessories
28 0740
Chapter 6
29
Troubleshooting
Displaying errors
Some errors result in an error message in the display. These error
messages are listed below.
Display text Problem Type Actions
Err
EMPTY BAT
The battery voltage is
below a critical level,
where further operation
would damage the battery.
Severe.
Radio is non-
functional.
Change/recharge
the battery.
Err
HW ERR
Hardware error. Severe.
Radio is non-
functional.
Service required.
ILLEGAL
Context fails operation.
This text will appear on
the following occasions:
•Multiple watch is
selected on channel 16,
or in channel regions
where it is not allowed.
• High power is selected
on a channel where it is
prohibited.
• Transmission on
blocked channels
Fail
operation
Consider operation
in a different
context.
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Troubleshooting
30 0730
Appendix A
31
Technical specifications
Technical data SP3550
General
Item Specification
RX frequency range 440.000 - 470.000 MHz
TX frequency range 440.000 - 470.000 MHz
Modulation
25 kHz
12.5 kHz
16K0G3E
8K50G3E
Power supply 7.2 VDC Li battery
Current drain at 5 W TX 1.8 A
Current drain at 1 W TX 0.9 A
Current drain RX max audio 0.25 A
Antenna port 50 ohm
Battery Lithium-Ion, 1800 mAh rechargeable
Operating temperature -20°C to +55°C
Water ingress protection IP67
Frequency stability Better than ±1.0 kHz
Weight with battery 340g
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Technical specifications
32
Transmitter
Receiver
Item Specification
RF output power, landmobile 4.8 W ±1 dB / 0.3 W ±1 dB
RF output power, maritime 1.8 W radiated / 0.3 W radiated
Max deviation
25 kHz
12.5 kHz
±5 kHz
±2.5 kHz
Spurious emission < 0.25 µW
Adjacent channel power
25 kHz
12.5 kHz
> 70 dB
> 60 dB
Item Specification
Sensitivity (20 dB SINAD) -117 dBm typical
Intermodulation
EN 300 720
EN 300 086
Better than
68 dB
65 dB
Spurious response > 70 dB
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Technical specifications
33
Adjacent channel selectivity
25 kHz
12.5 kHz
> 70 dB
> 60 dB
Audio output, internal 0.25 W at 10% dist.
Audio output, external 0.25 W/8 ohm
Item Specification
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Technical specifications
34
Battery life guidelines
Battery (rechargeable)
During daily use, always keep the battery fully charged and away from
hot areas.
Keep the battery terminals dry and clean.
Never discharge beyond the specifications of the battery.
Operation/Standby time depends on usage. Generally, the more the radio
is transmitting, the faster it will drain the battery. Also, the “Hi” power
setting will drain the battery faster than the “Lo” setting.
Approximate figures are:
• A battery can be stored for 4 to 6 month at 25°C if charged to 25%.
• The battery will normally last for 5 to 9 hours of use on a fully
charged battery.
Note New batteries should be placed in the charger for minimum 12
hours first time.
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Technical specifications
35
Dimensional drawing, transceiver
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