Ranger RCI-6900F HP Tranciever Manual
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RCI-6900F HP
RCI-6900F TB
TABLE OF
CONTENTS
PAGE
CHAPTER 1
SPECIFICATIONS
1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CHAPTER 2
OPERATION
2.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Control & Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.3 Frequency Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.1 Procedure To Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.2 Procedure To Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 7
2.4 Alternate Microphones And Installation . . . . . . . . . . . . . . . . . . . . . . . . 8
CHAPTER 3
CIRCUIT DESCRIPTION
3.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
3.2 Receiver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
3.3 Transmitter Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
3.4 Transmitter Amplifier Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CHAPTER 4
ALIGNMENT
4.0 Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
4.1.1 PLL Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
4.1.2 Transmitter Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
4.1.3 Receiver Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
CHAPTER 5
MAINTENANCE
5.0 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
CHAPTER 6
DIAGRAMS AND PART LIST
6.0 PCB Layout & Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20
RCI-6900F HP
RCI-6900F TB
CHAPTER 1
SPECIFICATIONS
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1.0 GENERAL
Model RCI-6900F HP / RCI-6900F TB
Frequency Range 28.245 - 29.655MHz.
Emission Modes CW/FM/AM/SSB (A1/F3/A3/A3J)
Frequency Control Phase Lock Loop (PLL) synthesizer.
Frequency Tolerance
± 0.005 %.
Frequency Stability
± 0.001 %.
Operating Temperature Range
-30°C to +50°C.
Microphone Dynamic PTT, 500 Ω
Input Voltage 13.8V DC
Current Drain: Transmit (AM full mod.) RCI-6900F HP < 5A; RCI-6900F TB < 15A.
Current Drain : Receiver (Squelched)
≤ 0.25A.
(Max. audio output) < 0.5A.
Antenna Connector UHF, SO239.
Dimensions : (RCI-6900F HP) 7 7/8”(W) x 10 3/4” (D) x 2 3/8”(H)
: (RCI-6900F TB) 7 7/8” (W) x 9 1/4” (D) x 3 7/8” (H)
Weight 5 lb. (RCI-6900F HP), 7lb 6 oz (RCI-6900F TB)
1.1 TRANSMITTER
AM/FM/CW ; SSB RF Power Output (RCI-6900FHP)
AM/FM/CW ; SSB RF Power Output (RCI-6900FTB) 10W ; 25W PEP
50W ; 100W PEP
RF Transmit Modes CW/FM/AM/SSB.
Modulation High and low level Class B, Amplitude Modulation.
Spurious Emissions -50 dB.
Carrier Suppression -35 dB.
Audio Frequency Response 300 to 2500 Hz
Antenna Impedance 50 Ohms.
Output Indicators Meter shows relative RF output power, receive signal
and SWR. Transmit LED glows red when transmitter
is in operation.
1.2 RECEIVER
Sensitivity For 10dB S/N (AM ; CW/SSB)
< 0.5 µV ; < 0.25 µV.
Sensitivity For 20dB S/N (FM)
< 0.5 µV.
IF Frequency AM: 10.695 MHz 1st IF, 455 KHz 2nd IF.
Image Rejection > 50 dB.
Adjacent Channel Selectivity > -55 dB (AM/FM) ; > -60 dB (CW/SSB)
RF Gain Control 45 dB adjustable for optimum signal reception.
Automatic Gain Control (AGC) Figure Of Merit 100 mV for 10 dB Change in Audio Output.
Squelch
Adjustable; threshold less than 0.5 µV.
Noise Blanker RF type.
Audio Output Power 2.5W @ 10% THD
Audio Frequency Response 300 to 2500 Hz.
Built-in Speaker 8 Ohms, 4 Watts.
External Speaker (Not Supplied) 8 Ohms; 4 Watts.
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
RCI-6900F HP
RCI-6900F TB
CHAPTER 2
OPERATION
- 3 - Figure 2-1 Front Panel 2.0 INTRODUCTION This section explains the basic operating procedures for the RANGER RCI-6900F HP / RCI-6900F TB mobile transceiver. 2.1 CONTROL AND CONNECTIONS 2.1.1 FRONT PANEL Refer to the above Figure 2-1 for the location of the following controls. 1. ON/OFF VOLUME CONTROL This knob controls the volume and the power to the radio. To turn the radio on, rotate the knob clockwise. Turning the knob further will increase the volume of the receiver. 2. SQUELCH CONTROL This switch is used to eliminate background noise being heard through the receiver which can be disturbing when no transmissions are being received. To use this feature of your radio, gently turn the switch fully counterclockwise, and then turn clockwise until the background noise is just eliminated. Further clockwise rotation will increase the threshold level and only strong signals will be heard. 3. MIC GAIN CONTROL Adjusts the microphone gain in the transmit mode. This control adjusts the gain to the extent that full talk power is available several inches away from the microphone. 4. RF GAIN CONTROL This control is used to reduce the gain of the RF amplifier under strong signal conditions. 5. TALKBACK CONTROL Adjust this knob for desired volume of Talkback. This is used to monitor your own voice. For example, you could use this feature to compare different microphones. 6. RF POWER CONTROL This control allows the user to adjust RF power output.
- 4 - 7. FR. POOL SELECTOR This switch is used to select the frequency range of operation (1 - 6). 8. MODE SWITCH This control allows you to select one of the following operating modes: CW/FM/AM/USB/LSB. 9. FINE/COARSE CONTROL Allows variation of the receiver operating frequency above and below the assigned frequency. Although this control is intended primarily to tune in SSB signal, it may be used to optimize AM/FM signals as described in the operating procedure paragraphs. Coarse operates both TX/RX, Fine operate in RX only. 10. CHANNEL SELECTOR This control is used to select a desired transmit and receive channel. 11. FRONT PANEL METER The Front Panel Meter allows the user to monitor signal strength, RF output power and SWR level. 12. TX/RX LED The red LED indicates the unit is in the transmit mode. The green LED indicates the unit is in the receive mode. 13. FREQUENCY COUNTER This display indicates the frequency of operations. 14. ECHO/OFF SWITCH This control is used for echo effect. 15. HI/LO SWITCH This switch changes tone quality in receive only. In LO position, bass is increased and in HI position, treble is increased. 16. S-RF/SWR SWITCH This is a two-function switch. In the S-RF position, the meter will indicate the strength of the signal being received, as well as the relative RF output of transmission. To use the meter to measure the standing wave ratio, turn the switch to the SWR position. 17. NB/ANL/OFF SWITCH In the NB/ANL position, the RF Noise Blanker and the Automatic Noise Limiter in the audio circuits are also activated. The Noise Blanker is very effective in eliminating repetitive impulse noise such as ignition interference. 18. R.B./OFF SWITCH In the Roger Beep position, the radio transmits an audio tone at the end of your transmission to indicate that transmission has ended. As a courtesy to others, use the Roger Beep only when necessary. 19. +10KHz/OFF SWITCH When the switch is pressed the frequency is shifted 10KHz up. 20. CHANNEL DISPLAY
- 5 - The channel display indicates the current selected channel. 2.1.2 REAR PANEL Figure 2-2 represents the location of the following connections: Figure 2-2 Rear Panel 1. ANTENNA This jack accepts 50 ohms coaxial cable with a PL-259 type plug. 2. POWER This connector accepts 13.8V DC power cable with built-in fuse. The power cord provided with the radio has a black and red wire. The black goes to negative and the red goes to positive. 3. CW. KEY This is used for Morse Code operation. To operate this mode, connect a CW key to this jack, and place the MODE switch in the CW position. 4. EXT. SP. This jack accepts 4 to 8 ohms, 4 watts external speaker. When the external speaker is connected to this jack, the built-in speaker will be disabled. 2.1.3 FREQUENCY CHART FR. POOL CHANNEL 1 (MHz) 2 (MHz) 3 (MHz) 4 (MHz) 5 (MHz) 6 (MHz) 1 28.245 28.695 29.145 28.315 28.765 29.215 2 28.255 28.705 29.155 28.325 28.775 29.225 3 28.265 28.715 29.165 28.335 28.785 29.235 4 28.285 28.735 29.185 28.355 28.805 29.255 5 28.295 28.745 29.195 28.365 28.815 29.265
- 6 - 6 28.305 28.755 29.205 28.375 28.825 29.275 7 28.315 28.765 29.215 28.385 28.835 29.285 8 28.335 28.785 29.235 28.405 28.855 29.305 9 28.345 28.795 29.245 28.415 28.865 29.315 10 28.355 28.805 29.255 28.425 28.875 29.325 11 28.365 28.815 29.265 28.435 28.885 29.335 12 28.385 28.835 29.285 28.455 28.905 29.355 13 28.395 28.845 29.295 28.465 28.915 29.365 14 28.405 28.855 29.305 28.475 28.925 29.375 15 28.415 28.865 29.315 28.485 28.935 29.385 16 28.435 28.885 29.335 28.505 28.955 29.405 17 28.445 28.895 29.345 28.515 28.965 29.415 18 28.455 28.905 29.355 28.525 28.975 29.425 19 28.465 28.915 29.365 28.535 28.985 29.435 20 28.485 28.935 29.385 28.555 29.005 29.445 21 28.495 28.945 29.395 28.565 29.015 29.465 22 28.505 28.955 29.405 28.575 29.025 29.475 23 28.535 28.985 29.435 28.605 29.005 29.505 24 28.515 28.965 29.415 28.585 29.035 29.485 25 28.525 28.975 29.425 28.595 29.045 29.495 26 28.545 28.995 29.445 28.615 29.065 29.495 27 28.555 29.005 29.455 28.625 29.075 29.515 28 28.565 29.015 29.465 28.635 29.085 29.525 29 28.575 29.025 29.475 28.645 29.095 29.535 30 28.585 29.035 29.485 28.655 29.105 29.545 31 28.595 29.045 29.495 28.665 29.115 29.555 32 28.605 29.055 29.505 28.675 29.125 29.565 33 28.615 29.065 29.515 28.685 29.135 29.575 34 28.625 29.075 29.525 28.695 29.145 29.585 35 28.635 29.085 29.535 28.705 29.155 29.595 36 28.645 29.095 29.545 28.715 29.165 29.605 37 28.655 29.105 29.555 28.725 29.175 29.625 38 28.665 29.115 29.565 28.735 29.185 29.635 39 28.675 29.125 29.575 28.745 29.195 29.645 40 28.685 29.135 29.585 28.755 29.205 29.655 2.2 MICROPHONE The receiver and transmitter are controlled by the push-to-talk switch on the microphone. Press the switch and the transmitter is activated, release switch to receive. When transmitting, hold the microphone two inches from the mouth and speak clearly in a normal voice. The radio comes complete with a low impedance (500 ohm) dynamic microphone. 2.3 OPERATION 2.3.1 PROCEDURE TO RECEIVE 1. Be sure that power source, microphone and antenna are connected to the proper connectors before going to the next step.
- 7 - 2. Turn VOL. knob clockwise to apply power to the radio. 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 SQ knob slowly clockwise until the noise just disappears. The SQ 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 receive gain. 8. Adjust the FINE/COARSE control to clarify the SSB signals or to optimize AM/FM signals. 2.3.2 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. 2.4 ALTERNATE MICROPHONES AND INSTALLATION For best results, the user should select a low impedance dynamic type microphone or a transistorized microphone. Transistorized type microphones have a low output impedance characteristic. The microphones must be provided with a four-lead cable. The audio conductor and its shielded lead comprise two of the leads. The third lead is for transmit control and the fourth is for receiving control. The microphone should provide the functions shown in schematic below (Figure 2-3). 4 WIRE MIC CABLE Pin Number Mic Cable Lead 1 Audio Shield 2 Audio Lead 3 Transmit Control
- 8 - 4 Receive Control Figure 2-3 Your Transceiver Microphone Schematic Figure 2-5 Microphone plugs pins numbers viewed from rear of pin receptacle. RCI-6900F HP RCI-6900F TB CHAPTER 3 CIRCUIT DESCRIPTION 3.0 INTRODUCTION This section explains the technical theory of operation for the RCI-6900F HP / RCI-6900F TB mobile transceiver. 3.1 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, IC4, IC5
- 9 - Q25, Q27, Q28, Q29 and Q61. The PLL circuit is programmed by the rotary channel switch GPS-0501. The GPS-0501 communicates the correct binary data information to the programmable divider inside of IC3. IC3 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). 3.2 RECEIVER CIRCUIT The incoming RF signal comes into the radio via the antenna and into the front-end pre-amp, Q17. The RF signal is fed into the mixer circuit of the Q18 & Q19 and then into the AM IF section of the receiver (depending on the mode of operation). The signal is then detected by either the AM detector or product detector or then fed to the audio amplifier section of the receiver and finally out to the speaker. 3.3 TRANSMITTER MODULATION CIRCUIT (i) 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 transmit amplifier circuit. (ii) 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. 3.4 TRANSMITTER AMPLIFIER CIRCUIT The transmitter takes the basic exciter signal from the TX mixer and amplifies it through a series of amplifiers consisting of Q50, Q51, Q49, Q47, Q48 and EPA010010B (only for RCI-6900F TB) where it is sent out to the antenna connector.