TRANSVERTER 23 CM BAND V 2.2

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. 


     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
GeneralMin.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



Front panel indicators and connectors

 


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.
No input power or input power is too low
Input power is low
Input power is OK
Caution! Input power is too high!
Monitoring SWR
When in TX mode Output LED indicates SWR as follows:
Excellent output SWR.
Moderate output SWR
Caution! High output SWR!




Jumpers
1 OFF : Normal operation 
ON   : Repeater mode , LO shift: -28 MHz
2
OFF : FLO= 1152 MHz
  FIF= 144 - 146 MHz 
ON : FLO= 1150 MHz
  FIF= 146 - 148 MHz
3 OFF: Normal
ON: -6 MHZ shift in repeater mode
4 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
VTT ON PTT can be switched on by applying DC 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
Ring Sequencer output, open collector NPN transistor 30V/0.3A max. Time delay: 25 ms after PTT LOW



  Measured results:

Oscillator phase noise
PhaseNoise_10kHz

Output spectrum
10MHz_Span

500MHz_Span

6Ghz_span