TR 2320 H-2304

Transverter for 13 cm

2304 ... 2306 MHz

Over 25 years of experience in development of new transverter technologies led to this masterpiece of VHF technology. Implementing technological innovations and expertise in a timely manner and combining them into a state-of-the-art product is a thing we have succeeded in doing in a very impressive way. It's a challenge for us to extend the limits of what is technically feasible and to put this into our products. Ranking first worldwide and improving our products continously are a matter of course for us.

Introduction

Several decades of engineering and production of Transverters result in this new 13cm high performance Transverter. His outstanding technical data make it usable for many applications. The high linear GaAs-FET-Amplifier with an output power of up to 15W allows a stand-alone operation as well as driving a power amplifier. The consequent usage of SMD components results in a noise figure of typ. 1.5dB. Several operation configurations allow an easy connection of a preamplifier and/or power amplifiers. The case allows the installation of further filter elements, attenuators, oscillators or other components.

The new design of our 13 cm transverter features better performance and many new functions.

Now, an external 10 MHz reference frequency can be connected to achieve highest frequency accuracy. This is necessary for EME, WSJT and Tropo DX. The frequency of 10 MHz can be supplied by a highly stable OCXO, a reference oscillator of a frequency counter, a rubidium frequency standard or a GPS controlled frequency source.
If a 10 MHz reference frequency is not available, the internal crystal oscillator of the transverter can be used. This crystal oscillator is frequency stabilized by our 40 °C precision crystal heater QH 40 A.

Oscillator

The oscillator signal of 120 MHz is generated by a low-noise and temperature-compensated oscillator. This circuit uses a precision crystal with 40° crystal heater. The phase noise of the output signallies at far under -132 dBc/Hz@10kHz which is better as the used 144 MHz transceivers. After the oscillator a tripler follows with the BFR92A.After a helical-filter the frequency 360 MHz is selected and coupled to another tripler with BFG93A. After a further helical-filter which is adjusted to 1080 MHz the signal reaches a doubler stage with BFG93A. Another helical filter selects the 2160 MHz signal which goes to the ring mixer.

Receiver

The receiver works with a low-noise HEMT-FET preamplifier stage with an own noise figure of 0.9 dB. After this one follows amultilayer-ceramicfilter and a MMIC amplifier stage. At next the signal reaches the RX/TX PIN-diode switch followed by a helical-filter and is brought to the ring mixer. For the operation of an external preamplifier via a separate coaxial cable a second N connector isalready built-in.

Transmitter

The IF input power is internally preset table in the area of 0.5 - 5 watts. The signal passes a helical-filter after the mixer and reaches the first MMIC driver stage. After the selection by another helical-filter thesecond MMIC driver stage follows. The driving signal goes to the 30W GaAs-FET-power-amplifier. To guarantee a clean output signal, the final stage is operated only with 15 W. A 5-pole harmonic filter realizes a spurious and harmonic suppression of over 50 dB. A directional couplerwith a Schottky-diode makes the calibrated indication of the output power possible at the built-in meter.

Sequence Controller

The built-in sequence controller makes a time controlled operation of a high-quality power amplifier and a coaxial relay possible with preamplifier directly at the antenna. Connections for this are at the equipment back side.

Specifications
Type	TR 2320 H - 2304
Frquency range	2304 ... 2306 MHz (Standard)
IF frequency range	144 ... 146 MHz
IF input power	0,5...5 W, adjustable
LO accurarcy @ 18 °C	typ. +/- 2 ppm, max. +/- 3 ppm (without 10 MHz reference frequency)
LO frequency stability (0 ... +40 °C)	typ. +/- 2 ppm, max. +/- 3 ppm (without 10 MHz reference frequency)
PTT control	contact closure to ground or +12 V on the IF-cable at TX
Supply voltage	15 W
External reference input	10 MHz / 2 ... 10 mW
Supply voltage	+13.8 V DC (+12 ... 14 V DC)
Current consumption	typ. 6 A (TX)
RX gain	min. 20 dB
Noise figure	typ. 1.5 dB
Case	aluminium
Dimensions (mm)	270 x 260 x 80
IF connectors / impedance	BNC-female/ 50 ohms
RF connectors / impedance	N-female/ 50 ohms
Reference input connector	BNC-female/ 50 ohms
DC supply voltage and control connector	SUB-D 9 pole

Block diagram

 

Connectors