Ranger 2950dx Cd Tranciever Manual

 
- 11 - RCI-2950 DX  
RCI-2970 DX  
 CHAPTER 4 PROGRAMMING     
4.0 INTRODUCTION 
This section explains the basic programming procedures for the RCI-2950 DX / RCI-2970 DX Amateur 
10 and 12 meter dual band mobile transceiver. 
 
4.1 FREQUENCY SELECTION 
Frequency selection in the RCI-2950 DX / RCI-2970 DX can be accomplished using anyone of the 
three following methods: 
 
(1) The first method of frequency selection is through the use of the SHF (Shift) key and the (s) Up 
and (t) Down arrows. To...

 
- 12 - (4) Press the SCAN key again (“SCAN-” should appear in the display window). 
 
(5) Using the SHF key and (s) Up and (t) Down arrows, select the lower scan limit, then press ENT. 
  
The upper and lower scan limits have now been programmed. To activate the scan feature, return the 
radio to manual operation and press the SCAN button. If the display shows “SCAN+”, the radio will 
scan from the lower limit to the upper limit. If “SCAN-” is displayed, the unit will scan from the upper 
limit to the...

 
- 13 - The RCI-2950 DX / RCI-2970 DX has an offset or split frequency feature that will permit the radio to 
be operated in a half-duplex mode. This will allow the user to talk on FM repeaters operating in the 10 
and 12 Meter bands. 
 
NOTE 
The FM repeaters may require a subaudible (CTCSS) tone 
be transmitted to gain access to the repeater. The RCI-
2950/2970 DX is not factory equipped with a CTCSS 
encoder/decoder.  
The split frequency function offsets the transmitter frequency either above or...

 
- 14 -  
RCI-2950 DX  
RCI-2970 DX  
 CHAPTER 5 CIRCUIT DESCRIPTION     
5.0 INTRODUCTION 
This section explains the technical theory of operation for the RCI-2950 DX / RCI-2970 DX mobile 
transceiver. 
 
5.1 PLL CIRCUIT 
The Phase Lock Loop (PLL) circuit is responsible for developing the receiver’s first local oscillator 
signal and the transmitter’s exciter signal. The PLL circuit consists primarily of IC2, IC3, Q29, Q32, 
Q33, Q34, Q36, Q37, Q38 and L16. The PLL circuit is programmed by the rotary...

 
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- 17 - RCI-2950 DX / RCI-2970 DX CPU CIRCUIT DIAGRAM   

 
- 18 - RCI-2950 DX  
RCI-2970 DX  
 CHAPTER 6 ALIGNMENT    
6.0 REQUIRED TEST EQUIPMENT 
 
 DC Power Supply (13.8VDC, 20A) 
‚ RF Wattmeter (100W)  
ƒ Multimeter 
„ Automatic Modulation Meter 
… Audio Signal Generator † Frequency Counter (100 MHz) 
‡ RF Signal Generator (100 MHz)   
ˆ Automatic Distortion Meter 
‰ Oscilloscope (50 MHz) 
Š Sinad Meter 
 
6.1 ALIGNMENT PROCEDURES 
This transceiver has been aligned at the factory and does not require any adjustments at installation. The 
required test...

 
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RCI-2970DX LEVELS ARE SHOWN IN []. 
 
ITEM U.U.T. SETTING ADJUST 
POINT MEASUREMENT TX Power Set radio to 28.000 MHz, AM TX mode. 
Modulation off. 
Set radio to 28.000 MHz, USB TX mode. 
AF signal 30mV, 1 KHz to microphone. 
Connect Oscilloscope to TP17. 
Set RF PWR Fully Clockwise. 
Set Clarifier Control to 12 o’clock. 
Set radio to 24.890 MHz & 29.699 MHz. L18,L37,L35, L34 
 
 
 
 
 
L35,L34 Maximum Output. 
 
 
 
 
 
 
Maximum Output and 
Balance.     AM APC Set radio to AM TX mode....

 
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ITEM SETTINGS ADJUST 
POINT MEASUREMENT AM Sensitivity Set radio to 28.000 MHz, AM RX mode. 
Set Clarifier Control to 12 o’clock.  
Set RF Gain Fully Clockwise. 
Set SQ Fully Counter Clockwise. 
Set NB/ANL/OFF switch to OFF position.  
Set VOL Control at 2 o’clock.  
Connect RF SG to antenna jack  
Frequency 28.000 MHz, 1uV. Mod 30%. 
Set radio to 24.890 MHz, AM RX mode. 
RF SG setting 24.890 MHz. 
Set radio to 29.699 MHz, AM RX mode. 
RF SG setting 29.699 MHz. L5,6,7,8,9,10
,2,3...