TEXAS RANGER TR-296DX, Руководство по обслуживанию

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TR-296GK/DX
CHAPTER 4
ALIGNMENT
4.0 REQUIRED TEST EQUIPMENT
!
DC Power Supply (13.8VDC, 10A)
"
RF Wattmeter (25~60 MHz, 25W)
#
Multimeter
$
Automatic Modulation Meter
%
Audio Signal Generator
&
Frequency Counter (100 MHz)
'
RF Signal Generator (100 MHz)
(
Automatic Distortion Meter
)
Oscilloscope (50 MHz)
*
Sinad Meter
4.1 ALIGNMENT PROCEDURES
This transceiver has been aligned at the factory and does not require any adjustments at installation.
The required test equipment listed are used for the test setup or alignment shown in Figure 4-1
Transmitter Test Setup and Figure 4-2 Receiver Test Setup. These test setup are used in part or total
during the following adjustments and refer to Figure 4-3 for adjustment location.
4.1.1 PLL ALIGNMENT
ITEM U.U.T. SETTING ADJUST
POINT MEASUREMENT
VCO Voltage Set radio to CH 1, AM RX mode.
Clarify setting in 12 o’clock position.
Connect DC Voltmeter to TP9 (R207).
Connect Oscilloscope to TP10 (R101).
Connect Oscilloscope to TP1 (R106).
L19
L21
L20
2.5 VDC
±
0.1
CH 1 & CH 40 Max.
Output and Balance.
AM
Frequency Set radio to CH 1, AM RX mode.
Connect frequency counter to TP1 (R106). L23 34.76500 MHz + 20 Hz
LSB Freq. Set radio to CH 1, LSB RX mode.
Connect frequency counter to TP1 (R106). L22 34.76350 MHz + 20 Hz
USB Freq. Set radio to CH 1, USB RX mode.
Connect frequency counter to TP1 (R106). L59 34.76650 MHz + 20 Hz
TX Frequency Set radio to CH 1, AM TX mode.
Connect frequency counter to TP1 (R106). VR5 34.76500 MHz + 20 Hz
AM TX Freq. Set radio to CH 19, AM TX mode.
Set Mic Gain fully counter clockwise. L31 27.18500 MHz + 20 Hz
LSB TX Freq. Set radio to CH19, LSB TX mode.
Set Mic Gain fully clockwise.
AF signal 25 mV, 1 KHz to microphone. L30 27.18400 MHz + 20 Hz
USB TX Freq. Set radio to CH19, USB TX mode.
Set Mic Gain fully clockwise.
AF signal 25 mV, 1 KHz to microphone.
CT2 27.18600 MHz + 20 Hz
4.1.2 TRANSMITTER ALIGNMENT