Ranger RCI-298595dx High Power Cb Tranciever Manual

							 - 11 - Wave Ratio) meter allows you to measure your antenna condition. To operate this function, connect 
your antenna to the transceiver antenna connector, set the mode switch to AM and adjust the MIC Gain 
to minimum. Select a frequency near the middle of the band you plan to use most. Activate the SWR 
function and press the PTT button on the microphone. A bar on the meter is an indication of the 
antenna matching. If there is no bar, it indicates that your antenna system is perfectly matched. The less 
bar, the better matched. If several bars appear, your antenna needs adjusting. The SWR function is self 
calibrating. 
 
3.3.9 CTCSS - OPTIONAL 
The RCI-2985DX / RCI-2995DX can operate with CTCSS frequencies for accessing repeaters, with an 
optional CTCSS (Continuous Tone Coded Squelch System) encoding device installed. 
 
3.3.10 PROCEDURE TO RECEIVE 
 
(1) Be sure that the power source, microphone and antenna are connected to the proper connectors 
before going to the next step. 
 
(2) Press the POWER switch to apply power to the transceiver. 
 
(3) Set the VOL. to a comfortable listening level. 
 
(4) Set the MODE switch to the desired mode.   
 
(5) Listen to the background noise from the speaker. Turn the SQUELCH knob slowly clockwise until 
the noise just disappears. The SQUELCH is now properly adjusted. The receiver will remain quiet 
until a signal is actually received. Do not advance the control too far or some of weaker signals will 
not be heard. 
 
(6) Set the CHANNEL selector switch to the desired channel. 
 
(7) Set the RF GAIN control fully clockwise for maximum RF gain. 
 
(8) Adjust the CLARIFIER control to clarify the SSB signals or to optimize AM/FM signals. 
 
3.3.11 PROCEDURE TO TRANSMIT 
 
(1) Select the desired channel of transmission 
 
(2) Set the MIC GAIN control fully clockwise. 
 
(3) If the channel is clear, depress the push-to-talk switch on the microphone and speak in a normal 
voice. 
 
 
 
 
RCI-2985DX 
RCI-2995
DX  
 
CHAPTER 4 
PROGRAMMING 
 
  
						

							 - 12 -
 
4.0 INTRODUCTION 
This section explains the basic programming procedures for the RCI-2985DX / RCI-2995DX Amateur 
10 and 12 meter dual band base station transceiver. 
 
4.1 FREQUENCY SELECTION 
Frequency selection in the RCI-2985DX / RCI-2995DX 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 (V) Up 
and (W) Down arrows. To accomplish this, press the SHF button until the cursor arrow is 
positioned under the digit of the frequency that is to be changed, then use the (V) Up arrow to 
increase the number. If a decrease in frequency is desired, press the (W) Down arrow. Perform 
the steps described above for each digit of the frequency until the desired frequency is displayed 
in the LCD display window. 
 
(2) The second method of frequency selection is accomplished using the SHF button and the 
frequency select knob located on the front panel. Use the SHF button in the manner described 
above to select the digit to be changed. Proceed to rotate the frequency select knob clockwise to 
increase the frequency. Rotate the frequency select knob counterclockwise to decrease the 
frequency. 
 
(3) The third method of selecting the operating frequency of the radio is through the use of the SHF 
button and the Channel (V) Up and (W) Down buttons located on the microphone. Frequency 
selection by this method is accomplished in the same manner as with the (V) Up and (W) Down 
arrows on the keypad. The only difference is that the Channel Up and Down buttons on the 
microphone is used. 
 
4.2 FREQUENCY SCANNING 
Frequency scanning can be achieved using one of two methods: the first method involves the scanning 
of pre-programmed memory channels. The second method permits the user to scan all frequencies 
between a pre-set upper and lower scan limit. Both of the methods of the frequency scanning. 
 
4.2.1 ALL FREQUENCY SCANNING 
To allow all Frequency Scanning, one must first program the upper and lower scanning limits. The 
scan limits are simply the highest and lowest frequencies that will be scanned. To program these limits, 
perform the following steps: 
 
(1) Press the PRG (Program) key. 
 
(2) Press the SCAN key (“PRG SCAN+” should appear in the lower right corner of the display 
window). 
  
(3) Using the SHF key and the (V) Up and (W) Down arrows, select the upper scan limit, then press 
ENT. 
 
(4) Press the SCAN key again (“SCAN-” should appear in the display window). 
 
(5) Using the SHF key and (V) Up and (W) Down arrows, select the lower scan limit, then press 
ENT. 
   
						

							 - 13 - 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 lower limit. To change from SCAN+ to SCAN- or vice versa, press SCAN. 
 
 
NOTE 
When programmed, the upper and lower scan limits will 
also act as the upper and lower operating limits of the 
radio. The radio now cannot be programmed to operate 
above or below the scan limits. 
 
 
4.2.2 MEMORY SCANNING 
The RCI-2985DX / RCI-2995DX has 10 non-volatile (i.e. memory resident) memory locations which 
can be programmed with any available frequency within the operating band of the radio. The scan 
function of the unit can be programmed to scan these memory channels. The radio will then scan only 
those memory channels which have been programmed. The first step in utilizing the memory scan 
function is to program the desired frequencies into the radio memory. This can be accomplished by 
performing the following steps: 
 
(1) With the radio operating in the manual mode, press the PRG (Program) key. 
 
(2) Press the MEM (Memory) key. “PRG” should be displayed in the lower right-hand corner of the 
LCD display window. In the upper left portion of the display, “MEMORY” should be displayed. 
Directly below MEMORY, a number between 0 and 9 will be displayed. This number represents 
the memory location currently being displayed. Pressing the MEM key will increase the memory 
counter to the next memory location and the contents of that memory location will be displayed. 
 
(3) Using the SHF key and the (V) Up and (W) Down arrows, enter the frequency to be stored in the 
memory location displayed. After the desired frequency has been entered, press ENT. 
 
(4) Repeat steps (2) and (3) for all the memory locations to be programmed. 
 
(5) After all desired memory locations have been programmed with frequencies, return the unit to the 
manual mode of operation by pressing the MAN key. 
 
(6) To initiate memory scanning, press MEM and then press SCAN. As previously discussed, the 
display will show “SCAN+” or “SCAN-” to indicate whether the radio is scanning from the 
lowest or the highest memory location or vice versa. 
 
(7) To return the radio to normal (non-scanning) operation, press the MAN key. 
 
 
 
 
4.3 OFFSET FREQUENCY OPERATION 
The RCI-2985DX / RCI-2995DX 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 dual band. 
 
  
						

							 - 14 -
NOTE 
The FM repeaters may require a subaudible (CTCSS) 
tone be transmitted to gain access to the repeater. The 
RCI-2985DX / RCI-2995DX is not factory equipped with 
a CTCSS encoder/decoder. 
 
 
The split frequency function offsets the transmitter frequency either above or below the receive 
frequency by a user programmable amount. In the following example, programming of a 100 KHz 
offset will be described. Before attempting to program the offset frequency, ensure that the radio is 
operating in the manual mode by pressing the MAN key. 
 
(1) Press the PRG (Program) key. 
 
(2) Press the SPLIT key. The LCD display window will display “00000” with “PRG” and “SPLIT” 
being displayed in the lower left hand corner. 
 
(3) Using the SHF key and the (V) Up and (W) Down arrows as described earlier, program the 
display to read “010000”. 
 
(4) Press ENT. A 100 KHz offset has now been programmed into the radio. 
 
(5) Return the radio to manual operation by pressing the MAN key. 
 
(6) Using the SHF key and the (V) Up and (W) Down arrows as described previously, set the radio 
for the desired receive frequency. 
 
(7) Press SPLIT. In the lower right corner of the display, either “SPLIT+” or “SPLIT-” will be 
displayed. If SPLIT+ is displayed, the transmitter will be offset 100 KHz above the receive 
frequency when keyed. If SPLIT- is displayed, the transmitter will be offset 100 KHz below the 
receive frequency. 
  
 
NOTE 
When the transmitter is keyed, the frequency display will 
change to show the frequency being transmitted. 
 
 
(8) To return the radio to simplex operation (i.e., same transmit and receive frequency), press the 
MAN key. 
 
 
 
 
 
 
 
 
RCI-2985
DX 
RCI-2995
DX  
 
CHAPTER 5 
CIRCUIT 
DESCRIPTION  
 
  
						

							 - 15 -
 
5.0 INTRODUCTION 
This section explains the technical theory of operation for the RCI-2985DX / RCI-2995DX Amateur 10 
and 12 meter dual band base station 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 channel switch GPS-
0751. The switch allows IC (U601) on CPU PCB to communicates the correct binary data information 
to the programmable divider inside of IC2. IC2 then controls the VCO (Voltage Controlled Oscillator) 
to oscillate on the correct frequency. This signal is fed either into the receiver’s first mixer (for receive 
operation) or the transmitter’s mixer (for transmit operation). 
 
5.2 RECEIVER CIRCUIT  
The incoming RF signal comes into the radio via the antenna and into the front-end pre-amp, Q19. The 
RF signal is fed into the mixer circuit of Q20 and Q21. The signal is then filtered by L8, L9 and L10 
then into the AM/FM IF section of the receiver (depending on the mode of operation). The signal is 
then detected by either the AM detector or FM detector and then fed to the audio amplifier section of 
the receiver and finally out to the speaker. 
 
5.3 TRANSMITTER MODULATION CIRCUIT 
(1) The transmitter modulation circuit modulates the low-level RF signal from the PLL exciter circuit 
with the user’s audio voice signal from the microphone. The audio from the microphone is then 
amplified and fed into the balanced modulator circuit. 
 
(2) If the transceiver is in the AM mode, the AF Power amplifier modulates the last RF amplifier, 
which produces a true amplitude modulated RF signal. 
 
(3) If the transceiver is in the FM mode, the audio signal is not mixed with 10.6975MHz oscillator but 
instead phase modulates the basic exciter signal from the PLL circuit in the TX mixer.  
 
(4) If the transceiver is in the SSB mode, the audio signal is mixed with the 10.6975MHz oscillator in 
IC5. 
 
5.4 TRANSMITTER AMPLIFIER CIRCUIT 
The transmitter takes the basic exciter signal from the TX mixer and amplifies it through a series of 
amplifiers consisting of Q64, Q63, Q62, Q61, Q60 and EPA010010B (only for RCI-2995DX) where it 
is then sent out to the antenna connector. 
 
 
 
 
 
 
 
 
 
 
 
  
						

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RCI-2985DX 
RCI-2995
DX  
 
CHAPTER 6 
ALIGNMENT 
 
 
 
6.0 REQUIRED TEST EQUIPMENT 
 
c AC Power Supply (110V AC) 
d RF Wattmeter 
e Multimeter 
f Automatic Modulation Meter h Frequency Counter (100 MHz) 
i RF Signal Generator (100 MHz)   
j Automatic Distortion Meter 
k Oscilloscope (50 MHz)  
						

							 - 20 - g Audio Signal Generator l 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 equipment listed are used for the test setup or alignment shown in Figure 6-1 
Transmitter Test Setup and Figure 6-2 Receiver Test Setup. These test setups are used in part or total 
during the following adjustments and refer to Page 59 for adjustment location. 
 
6.1.1 PLL ALIGNMENT 
 
ITEM U.U.T. SETTING  ADJUST 
POINT MEASUREMENT 
PLL 2  
VCO Voltage Set radio to 24.890 MHz, AM RX mode. 
Frequency setting at 29.699 MHz. 
Connect Multimeter to TP10. L14 
1.0 VDC ± 0.1 
≤ 4.5 VDC 
    
PLL 1  
VCO Voltage Set radio to 24.890 MHz, AM RX mode. 
Frequency setting at 29.699 MHz. 
Connect Multimeter to TP11. L13 
1.0 VDC ± 0.1 
≤ 6.5 VDC 
    
AM Frequency  Set radio to AM RX mode. 
Set Clarifier Control to 12 o’clock.  
Connect Frequency Counter to TP16. VC2 
 10.100 MHz ± 10 Hz 
 
    
TX Frequency  Set radio to AM TX mode. 
Connect Frequency Counter to TP16. VR8 
10.100 MHz ± 10 Hz 
    
VCO Output  Set radio to 28.000 MHz, AM RX mode. 
Connect Oscilloscope to TP3. L17 Maximum Output 
38.6950 MHz. 
    
AM OSC  Set radio to AM TX mode. Mod off 
Connect Frequency Counter to TP5. L18 
10.6950 MHz ± 10 
Hz 
    
USB OSC  Set radio to USB TX mode. Mod off. 
Connect Frequency Counter to TP5. L20 
10.6975 MHz ± 10 
Hz 
    
LSB OSC  Set radio to LSB TX mode. Mod off. 
Connect Frequency Counter to TP5. L19 
10.6925 MHz ± 10 
Hz 
    
 
 
 
6.1.2 TRANSMITTER ALIGNMENT 
 
RCI-2995DX 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. L18,L37, 
L35,L34 
 
 
 
 
 Maximum Output.