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SG Lab Ltd 1296MHz / 144MHz Transverter
Front panel indicators and connectors
1296 MHz Transverter v.2.2
Description:
Transverter for 23cm amateur radio band.
The new design v 2.2 of our transverter
features better performance and some new
functions. Our new transverter's design (v
2.2) offers better performance and some
new functions.
Applicaton:
Due to its small dimensions and light weight
this transverter is suitable for portable or
stationary operation.
How to order:
General Min. Typ. Max. Unit
Frequency range RF 1240 1296 1300 MHz
LO Frequency: Normal Mode 1152 (or 1150 / 1154 ) MHz
LO Frequency: Repeater Mode - 28 MHz 1124 / 1122 / 1126 MHz
LO Frequency: Repeater Mode - 6 MHz 1146 / 1144 / 1148 MHz
LO Accuracy at 20°C +/- 1 ppm
LO temp. stability +/- 2.5 ppm
Supply Voltage 12 13.8 V
Current Consumption 0.8 A
Dimensions 104 x 114 x 25 mm
Trasnsmitter
Input Power 0.2 5 W
Output Power 1.8 2.0 2.5 W
Receiver
Receive Gain , Adjustable -5 +10 dB
Noise Figure 0.9 dB
Spurious response rejection -55 dB
Features
Emmision Modes: SSB, AM, CW , FM
2W output power
Low noise figure GaAs HEMT input stage
High performance UP / DOWN converters
High stability TCXO
Internal Tx/Rx switch
Split-frequency operation option (selectable, require additional
soldering)
Internal Directional Coupler
PTT can be switched by connecting PTT to ground, by RF power
(selectable) or by DC voltage
RX/TX switching:
push PTT input to ground
RF VOX
apply DC voltage to coax cable
Output SWR indicator - bi- color LED
Optimal input power indicator - bi-color LED
Integrated Sequencer
Repeater operation option : -28 / - 6 MHz LO shift TX (selectable)
Working via repeater: default -28 MHz LO offset (selectable)
Specifications
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SG Lab Ltd 1296MHz / 144MHz Transverter
Controls and jumpers inside the box
To adjust input power :
1. Adjust transceiver's output power between 0.2 и 5 W.
2. Place the transceiver in transmit mode
3. Carefully rotate TX POWER trimmer until Input LED lights
green.
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No input power or input power is too low
Input power is low
Input power is OK
Caution! Input power is too high!
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SG Lab Ltd 1296MHz / 144MHz Transverter
Monitoring SWR
When in TX mode Output LED indicates SWR as follows:
1
2
3
4
Excellent output SWR.
Moderate output SWR
Caution! High output SWR!
Jumpers
OFF : Normal operation
ON : Repeater mode , LO shift: -28 MHz
= 1152 MHz
OFF :
ON :
F
LO
F
= 144 - 146 MHz
IF
= 1150 MHz
F
LO
F
= 146 - 148 MHz
IF
OFF: Normal
ON: -6 MHZ shift in repeater mode
OFF: PTT ON by connecting PTT input to
GND
ON : PTT is also RF activated with IF input
power >0.2W ( RF VOX )
SWR voltage connector
Connect high impedance voltmeter to measure forward
and reflected wave
FWD Voltage of forward wave
REF Voltage of reflected wave
GND Ground
PWR / VTT
PWR ON
Transverter can be DC powered by coaxial
cable.e
PTT can be switched on by applying DC
VTT ON
voltage 5-15 V A bias tee is needed to
insert DC power into coaxial cable.
3.5 mm audio jack
Tip PTT, active: LOW
Sequencer output, open collector NPN
Ring
transistor 30V/0.3A max. Time delay: 25
ms after PTT LOW
http://www.sg-lab.com/TR1300/tr1300.html[2017-02-09 14:52:08]
Measured results:
Oscillator phase noise
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SG Lab Ltd 1296MHz / 144MHz Transverter
Output spectrum
http://www.sg-lab.com/TR1300/tr1300.html[2017-02-09 14:52:08]
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SG Lab Ltd 1296MHz / 144MHz Transverter
http://www.sg-lab.com/TR1300/tr1300.html[2017-02-09 14:52:08]
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