SECTION 1t DESCRIPTION 430MHz ALL-MODE TRANSCEIVER INCORPORATING A MICROCOMPUTER CPU: control: with sitcom's ‘original: programs ‘provide Various operating capabilities: | Backslash dial controlled by sitcom's 'unique rotary encoder: circuit. The band-edge detector and Endless System: provides: out-of band: protection. | There are: no variable capacitors or dial gear, ensuring problem:free use.: The IC480A/E accommodate FM, USB. LSB. CW coverage in the 430 <440 MHz frequency range.
SECTION il INSTALLATION UNPACKING Carefully remove your transceiver from the packing carton and examine it for signs of shipping damage. Should there be any damage, notify the delivering carrier or dealer immediately, stating the full extent of the damage; 1t recommended yol geek the shipping cartons. ' In the scent storage, moving, or reshipment becomes necessary. they: can come in handy. Accessory hardware, cables, etc., are packed with the transceiver.: Be'sure you have not overlooked anything: 1.
‘the mobile mounting bracket will provide you with some guidance ‘as to placement. Any place where i can be mounted with metal screws; bolts, or pop-rivets will work . For fixed station use, 3 power supply shouts be designed to produce 3.6 amps for the: transceiver. POWER REQUIREMENTS The transceiver s supplied ready to operate from any regulated 13.8V DC, 3.6 ampere negative ground source.: An automobile: 12 volt, negative ground stern is usually more than adequate for operation.
attempt 1o adjust an anteing For fewest SWERVE when Using g diode SWERVE meter not engineered for: UHF applications.: Such readings will invariably have an error of 40% or more.
ROL FUNCTIONS ({0 AT FRONT PANEL DECEIVE INDICATOR TRANSMIT INDICATOR PRIORITY. SWITCH PRIORITY.
4. kHz STEPS SWITCH Pushing/the kHz STEPS Switch IN, and rotating the tuning knob will resulting changing the frequency in kHz steps.in any mode. This button will allow you to quickly OSY over great frequency range in SSB and CW| and to tune in M signals which are off from KHz-step frequencies. 5. VOLUME CONTROL and: POWER: SWITCH When the control is turned completely counterclockwise; the power is DFF.
12. NB (NOISE BLANKER] SWITCH ‘When:pulse type noise such ias automobile: ignition noise is audible; set this switch to the ON {locked in} position, ' The noise will be reduced to provide comfortable reception. {The Blankenship does not titivate in the Demimonde} PROBITY: SWITCH Turns the priority: function ON and OFF.
24 S/RF INDICATOR Indicates Unitas and RE output feel with seven LED’s in line. The imbibers on the Ureter represent ST troth 59 and 20 and B80d8 over S9.: The RE output level meter functions only 4 relative: putout meter and does not indicate the wattage. These functions: are switched automatically when T/R switching is made. REAR PANEL ANTENNAE CONNECTOR AS ACCESSORY. SOCKET EXTERNAL STREAKER JACK YIKES JACK POWER SOCKET 25. ANTENNA CONNECTOR This is used o connect an antenna to the set.
PIN No. FUNCTION 7. 8 Volts DC available (20mA Max i} 8 Input of the escalator unit power supply: When 8 Volts DC s applied to this terminal; a tone-burst is generated. 9 When this terminal is connected to Pin 3, +13.8 Vomits DC IS superimposed on the antenna feed: line for 2 lamplighter's power source.
SECTION V OPERATION HOW TO TUNE The following instructions are for tuning in any mode. Please read carefully and understand fully before turning ON your unit. Proper tuning is necessary. for optimum operation. PRESET FREQUENCIES When: the POWER Switch is muted ON, the frequency display will be 1.000. representing 431.000 MMz, when the MODE Switch is in the FM position.
The click stops of the knob change in:100Hz Stepsister the Biosensor CW modes, ‘or kHz or 26K Hz Steps i the: Impeded: (1K Hz when the: 1KH2 Reps Switch is: pushed 1N & The smaller vernier marks on the knob represent a click stop and the larger marks represent ten click stops, One com: plate rotation of the tuning knob results frequency increases or decreases of a Birch (1 25ME in FM1 mode, 250KHz in FM2 mode and Book when the kHz Steps Switch is pushed INJ. When you: reach 439.999.
FOR EXAMPLE: 15432 125 MHz s set with AT VEG hand the VEQ switch s semitone: 1B/E VEO. the frequency: readout wilt show “Bivalve's frequency; but 432 125.0MHz is still storminess A VPG s memory: Returning the VRO Switch to PAVE position, and: 1 2.125.0 will be displayed on the readout: Accordingly, If the switch s placed o the "B VEQ position, the frequency that was set with the B2 VEO will ‘appear.
2 When the OFFSET Switch in the "DUPE" position; the setting in DUPLEX mode; and the transmit frequency is set MHZ {or 1.6MHz, or reset offset frequency) above the receive frequency. At the same time, the DUPLEX INDICATOR is it 3. When the OFFSET Switch is in the position, the set is in. DUPLEX mode, and the transient frequency s set Zomba (or LOOM, resetting offset frequency) below the receive frequency, and the DUPLEX INDICATOR is lit.
B When 1o do if vou want 1o operate repeaters that have a frequency ‘difference other than #MHz {or £1.6MHz}, for example 4.6MHz). FOR EXAMPLE! Set the MODE Switch in the “OW'" position; and the FREQUENCY DISPLAY shows 607 {IC-4B0E = Turn the tuning control nab to be shown “4.6" on ' the display, then push the MEMORABILITY button. Set the MODE Switch to the "EM' position; and set "A” VEQ to 437.725MHz. Then set the OFFSET Switch to the "—DUMPY position. 7.725.
SCANNING OPERATION The IC-490ATE provides various scanning operations.! Please read the following instructions carefully to fully enjoy the many capabilities. MEMORY SCAN This is 1o scan the five Memory Channels and two UFO's frequencies continuously. Program five desired frequencies in Memory Channels 1~ 4 and Calling Channel. et the MEMORY CHANNEL Switch to ane of the memory positions.
Turing Goatee irons g Trenton Foreign For bag Hone Tiring Ringtone Percent e gyt g Osiris i o Loonie VEO FULL RANGE SCAN This is to scan the entire band between 430.000MHz and 439.999MH2. 1. Bet the MEMORY CHANNEL Switch ta VEO position, and the VETO-SCAN FUN: SON Switch located under the top cover to "FULL SCAN position. Depressing the 5/8 button starts the scan from the VFO frequency 1o the low sedge: The scanning frequency increments depend on the MODE Switch setting and the 1K Hz STEPS Switch setting.
2. By setting the SCAN-STOP TIMER Switch in: ON position: antithetic SCAN-STOP UNCTION Switch in BUSY position, the scan will stop on a signal, and will restart after specified times passed, whether ‘a signal has ‘been received or not. This scan stopping time is adjustable between & seconds and 20 seconds with the SCAN-STOP TIME CONTROL located under the top cover: SIGNAL RECEIVED NO SIGNAL ON SCAN GFE L Postwomen TN cubes s pureness Span shits | Alston | Goad reactants Manicurist (Manual regress] 3.
NOTE: The auto-stop circuit functions with S5B or CW signals. bt the scan does hot always stop at ‘the ‘exact carrier frequencies. While the scan stop s operating on one of these signals, tune in to the signals for better reception by rotating the Caning Control and by dotting the MODE Switch to the proper mods, PRIORITY. FUNCTION ‘This function is provided 1o check your favorite channel, such as § local repeater or a calling channel, written into a memory channel while operating on .
8SB OPERATION 1. RECEIVING After connecting an antenna, microphone; etc.; set knobs and switches as fallows.
3 4. AGC (AUTOMATIC GAIN CONTROL) The ICH90A/E has a fast artack/slow release AGC system which holds the: peak voltage of rectified 1F signals from the IF amp circuit fora certain period.: Therefore, during the pauses inc normal speech of the received signal; uncomfortable noise will not be heard. Far normal ‘SSB reception, set the AGC Switch in the OUT (slow) position. Set the AGC Switch in the :EAST {pushed when tuning or receiving signals with short interval fading.
speaker.: i The loudness of this: tone i adjusted: by rotating the CW OMEN Control located on' the main unit inside cover. : Rotating the CW: MONI. Control clockwise makes the ‘tone louder. EM OPERATION 1 2. RECEIVING For M reception; set the MODE Switch 1o the EM1. or FM2 position.
SEC VIl CIRCUIT DESCRIPTION OUTLINE The 1C400A/E employees 4 digital phase locked too (PLL) circuit a5 the local oscillator: for both transmit and receive. The output of the PLL circuits approximately 39.38MHz below the receive frequency thereby spurious is kept to @ minimum. The operating frequency is controlled by pulse signals, generated by the rotary encoder located at the tuning knob; being added to or subtracted from the preset frequencies in the:microcomputer.
2ND MIXER CIRCUIT Amplified Tst [E signal is fed to the 2nd mixer. 1C1, diode double balanced mixer through the T/R switching jade D1, X 28.63MMz signal Tom the 2nd local oscillator circuit is fed to another input portion ICT, and the 1st IF signal is converted to a 10.76MHz 2nd |F signal. The 10.
which: has excellent selectivity, then fed to 1C12 against amplify and detect. The detach AE signals are put oUt from Pin © and fed to an AF amplifier Q28. in the 8SB and CW modes, D23 is turned ON and signals are amplified by 8 two stage amplifier consisting: of duality MOS PET's O18 and ‘17, These amplifiers provide high gal and high stability, ‘and the IF coils, L16 ‘and 115 reject interference from outside the IF pass band and other wide-range noise.
connected to Pin 13 of ICC through D45, and it makes maxim urn attenuation for receiver audio signals and silences the set. When a signal is received, the nose comportment is suppressed by the signal, the base voltage of 030 is towered, and Q30 is turned OFF.
TRANSMITTER CIRCUITS ANTENNA SWITCHING CIRCUIT writhe transmit: made; D1 ind D2 are turned: ON: D1 bedsitter transmitting signals to antenna through: the foe-pass: filter, and D2 grounds the input terminal of the receiver; thus the transmit: ing signals are prevented from:Howinginto the receiver circuits. MICROPHONE AMPLIFIER ‘AND LIMITER: CIRCUIT Audio signals from the microphone are fed o Pin 2 of the audit amplifier 1C1.
BUFFER AMPLIFIER CIRCUIT The filtered 430MHz signals, supplied to the first ate of the dual-gate FET Q0 are amplified 1o approximately: 10mW PEP. The output of thereafter amplifier:is sent through the transmit band: pass: filter: L21 and .22 to the other buffer amplifier Q10, whose output level'is approximately 200mW PEP, then sent to the PA unit. POWER: AMPLIFIER CIRCUIT The signals from Q1010 the RE “YGR unit are amplified by ICT 10 the PA unit to obtain 10W PER. The heat from.
PLL (PHASE LOCKED LOOP) UNIT LOCAL OSCILLATOR CIRCUIT This circuit {s for the oscillation. in 100Hz2 steps; of the lowest two digits (0.0~ 9.9KHz) of the VCO output frequency 'of the PLL circuit. It consists of Q2 oscillator, O3 quadruplet and 04 frequency triplet. The crystal unit X1, a special VXO {Variable Ital Oscillator) crystal, is connected to (02’5 base and oscillates ar about 15.
The programmable divider is also called the 1/N counter and the BCD inputs N.: The relationship between the display frequency and the divide number N is as follows: DISPLAY FREQUENCY: OUTPUTTED DIVIDE NUMBER (N} 430.000MHz 1000 1107 430.010MHz 1001 1108 : 2 ¢ 431.000MHz 1100 1207 ¢ L ¢ 432.000MHz 1200 o 1307 ! ¢ { 438.000MHz 1800 1907 ¢ 1 1 439.000MHz 1900 2007 2 2 e 439.990MH2 1889 2106 REFERENCE: FREQUENCY GENERATOR CIRCUIT.
BUFFER AMPLIFIER CIRCUIT: The VOO output signals are fed to oversimplification Q8. They're then fed 1o the second gate of ‘the mixer: 06 through: isolation: buffer amplifier Q7 to get a Decolletage o control the frequency of the VCO.
"Tha scan function is provided by pushing the scan Start/Stop {5/S) button. When pushed the §/8 button; Pin 5 of DICT wildflower to round level, the voltage at (£ and ) are also lowered; and the multi vibrator, consisting of IC3, ‘starts: oscillation for scanning, and: the decimal ‘points of the frequency display: will blink: When Pin 6 of 1C1 is lowered, Pin 3 {LIP/DOWN: control ‘terminate) is visa lowered, hut its voltage s still the downward scanning is:selected.
(FM} This flow ‘occurs when the MODE Switch is set at “EM”.
1 (kHz Taps) When the KHz Steps Switch 15 polished in, these flows not coriander the opera: ing frequency is moved up or down with kHz steps in any mode by tiring the tuning control knob or scanning. 05 A0 {+Duplex} This flow scours: when the OFFSET Switch iy set at "DUMPY ‘and: the transmit frequency becomes 3 frequency which'is added the specified offset frequency to the receive frequency.
NOTE: The port Bi's used to initialize the CPU whine the power is turned When this: flow ‘occurs, ‘the operating frequency range: 15 selected between and 80 o5 (B0, BY, B2, B3) When this: flow occurs, the TNHz2 digit of the offset frequency:is preset. 'The digit is decided by 8 BCD code consisting B2 =4 B3 =38} &) 08B0, B1, B2, B3) When this flow occurs; the 100K Hz digit of the offset frequency is preset. The digit is decided bya BCD code consisting.
When the power is turned ON, the CPU s initialized and then reads the mode sexting and memos sizer it Then the CPU reads: the control: data: ‘from: the external controller in the order of the numbers of the matrix and controls the various necessary operations.
SECTION VIl TROUBLE-SHOOTING Your 1CA00AJE has been tested very carefully at the factory before shipping. The chart below has been designed 'to help you correct any problems which are not equipment malfunctions. If you are not able to locate the problem sandlot solve it through use of this chart please contact your dealer or ICON distributor for assistance. Problem Possible Cause Solution 15 Power does not come | Power “cord | is improperly | Carefully reconnect prows cord. ON when the switch.is |connected.
Problem Possible Cause Solution 5 No or fow RE output. RE Power Switches set at the Low position: PIT: Switch s not functioning due to bad connection of the MIG connector The antenna feeder s locution shorted: When 588 of FM is desired, but the MODE Switch s in the CW position: Set the RF Power Switch to the High (normal) position. Choke the connection of the MIC connector and correct any. problems: Check the anterior feeder and correct any problems. Set: the ‘MODE Switch 'to the USB, L6B or EM position. 6.
Problem Possible Cause Solution 9 ‘Thermopylae. scan aeration does into function when the Switch pushed; No: frequency is programmed in the: memory :channels or the same frequency: s pros rammed: in all the memory channels: The MEMORY. (CHAN: NEL Switch not in the Memory Channel position: Program:the required frequencies in:the memory: channels follow: ing the instructions for "MEMO: RY CHANNEL OPERATION” on page 16. : Set the MEMORY CHANNEL Switch iin the Memory Channel position.
