technical manual for sailor compact hf ssb t2130 - Gopher Proxy
technical manual for sailor compact hf ssb t2130 - Gopher Proxy
technical manual for sailor compact hf ssb t2130 - Gopher Proxy
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1 GENERAL INFORMATION T2130<br />
1.4 PRINCIPLE OF OPERATION AND BLOCK DIAGRAM<br />
SAILOR Compact HF SSB T2130 is a 250W PEP transmitter in SAILOR Compact HF SSB Programme<br />
2000. It contains following circuits.<br />
POWER AMPLIFIER<br />
The power amplifier is a push-pull amplifier.<br />
The input signal from RE2100 is fed through a TX/RX switch on the output filter unit to the input of the<br />
power amplifier. The signal is amplified to approx. 280W PEP. The bias to the pre-driver, driver, and PA<br />
can be switched off from the TX microprocessor. When this is done, the output power will be attenuated<br />
more than 60 dB.<br />
OUTPUT FILTER<br />
The output filter consists of six lowpass filters, a directional coupler, a tune/transmit switch, and a TX/RX<br />
switch.<br />
From the power amplifier the signal is fed to a lowpass filter, which attenuates all harmonics. Then the<br />
signal passes a directional coupler, which gives in<strong>for</strong>mation about the standing wave ratio to the TXprocessor<br />
unit.<br />
After the directional coupler the signal is fed to a drive/transmit switch. In position drive the output power<br />
is fed to a 50 ohm load. This load is used to set the output power to the correct value.<br />
After this switch the signal is fed to the TX/RX switch.<br />
In position RX the signal from the aerial coupler AT2110 or the aerial is fed directly to RE2100.<br />
In position TX the signal from RE2100 is fed to the input of the power amplifier and the output power is<br />
fed to the aerial coupler AT2110 or the aerial.<br />
TX PROCESSOR<br />
The processor takes care of controlling the power amplifier, output filters, aerial coupler AT2110, and<br />
communication with RE2100.<br />
From RE2100 the TX-processor receives in<strong>for</strong>mation about frequency and receive/transmit mode. The<br />
TX-processor gives in<strong>for</strong>mation to RE2100 about tuning/tune ready and attenuator setting.<br />
During tune-up the TX-processor is controlling the aerial coupler. It tunes <strong>for</strong> best standing wave ratio<br />
measured with the directional coupler on the output filter module.<br />
During transmit the TX-processor is checking the temperature of the PA-transistors, supply voltage, and<br />
stating wave ratio. From these data the TX processor calculates the max. permissible power, and then<br />
sends this in<strong>for</strong>mation to the RE2100, where the processor unit sets the attenuator in the exciter unit to<br />
the correct value.<br />
POWER SUPPLY<br />
This unit consists of two power supplies and the AF-amplifier.<br />
The 24V DC is first fed to a relay which switches off/on the supply to the power supplies.<br />
One switch mode power supply is used to generate ±18V and 9V <strong>for</strong> all small signal circuits in T2130 and<br />
RE2100. The supply <strong>for</strong> the power amplifier and the AF-amplifier passes through a serial regulator, which<br />
limits the voltage to max. 28V.<br />
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