Motorola Radio Mcs2000 Vol 1 68p81083c20 A Manual
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Disassembly & Reassembly and Replacement Procedures 5-25 1Decimal NumberBlack N/A N/A N/A 3805233Z02 N/A 2Decimal NumberBlack N/A N/A N/A 3805233Z03 N/A 3Decimal NumberBlack N/A N/A N/A 3805233Z04 N/A 4Decimal NumberBlack N/A N/A N/A 3805233Z05 N/A 5Decimal NumberBlack N/A N/A N/A 3805233Z06 N/A 6Decimal NumberBlack N/A N/A N/A 3805233Z07 N/A 7Decimal NumberBlack N/A N/A N/A 3805233Z08 N/A 8Decimal NumberBlack N/A N/A N/A 3805233Z09 N/A 9Decimal NumberBlack N/A N/A N/A 3805233Z10 N/A *Special CharacterBlack N/A N/A N/A 3805233Z11 N/A 0Decimal NumberBlack N/A N/A N/A 3805233Z12 N/A #Special CharacterBlack N/A N/A N/A 3805233Z13 N/A 2ABCNumeral- LetterBlack N/A N/A N/A 3805233Z14 N/A 3DEFNumeral- LetterBlack N/A N/A N/A 3805233Z15 N/A 4GHINumeral- LetterBlack N/A N/A N/A 3805233Z16 N/A 5JKLNumeral- LetterBlack N/A N/A N/A 3805233Z17 N/A 6MNONumeral- LetterBlack N/A N/A N/A 3805233Z18 N/A 7PRSNumeral- LetterBlack N/A N/A N/A 3805233Z19 N/A 8TUVNumeral- LetterBlack N/A N/A N/A 3805233Z20 N/A 9WXYNumeral- LetterBlack N/A N/A N/A 3805233Z21 N/A Graphic Pushbutton Part Number Legend Description Color Size A Size B Size C Size D Size E
5-26 Disassembly & Reassembly and Replacement Procedures NOTES
Radio Tuning Procedure 6-1 Radio Tuning Procedure 6 General An IBM PC (personal computer) and RSS (Radio Service Software) are required to align the radio. Refer to the applicable RSS Manual for installation, setup procedures for the software and minimum computer requirements. To perform the alignment procedures, the radio must be connected to the PC, RIB (Radio Interface Box), and Test Set as shown in Figure 6-1. The use of Mini UHF Adapters will have damaging effects on the RF Antenna Connector which might lead to radio failure. Figure 6-1 Radio Alignment Test Setup ! C a u t i o n BNC RIB RLN4008 or SRIB RLN1015 RIB POWER SUPPLY 0180357A57 (110VAC) 0180357A56 or EPN4041A (220 VAC.)/ EPN4040A (240 VAC.)COMPUTER INTERFACE RIB CABLE 30-80369B71/72 or COMPUTER INTERFACE SRIB CABLE 30-80390B48/49 DATA BUSY GND COMPUTER AUDIO GENERATOR SINAD METER AC VOLTMETER TX RX 30 dB PAD 30 dB PAD RF GENERATORSERVICE MONITOR OR COUNTER WATTMETER DC/BATTERY HKN4191 or HKN6110TRANSMIT RECEIVETEST SET RLN4460A or GTF180BRADIO PROGRAM/TEST CABLE RKN4062A, RKN4063A or GTF372A AUDIO IN MEPC-95029-A/GB
6-2Radio Tuning Procedure As listed in the Service Aids table in Chapter 3 two different RSS packages are available for Þeld programming of the MCS 2000 radios: ¥ RVN4113 for SmartNet/Zone, STARTSITE and Conventional StatAlert operation ¥ GVN6011 for Conventional Select 5 operation. In RVN4113 all service and tuning procedures are performed from the SERVICE menu, which is selected by pressing F2 from the MAIN MENU. Figure 6-2 illustrates how the MCS 2000 RSS SERVICE screens are organized. In GVN6011 all service and tuning procedures are performed from the TUNE RADIO menu which is entered by pressing F2 , F5 from the MAIN MENU. The structure of the TUNE RADIO menu is the same one as shown for the SERVICE menu in RVN4113 illustrated in Figure 6-2. The two RSS packages are very similar. The following tuning procedure is mainly described as seen from within the RVN4113 package. Figure 6-2 Service Menu Structure for RVN4113 Before going into the Service Aids menu, the radio must Þrst be read using the GET/SAVE/PROGRAM Radio Data menu (if the radio has just been programmed with data loaded from disk or from a newly created codeplug, then it must still be read so that the RSS will have the radioÕs actual tuning values). All SERVICE screens read and program the radio codeplug directly; you do NOT have to use the RSS GET/SAVE functions to program new tuning values. Do NOT switch radios in the middle of any SERVICE procedure. Always use the EXIT key to return to the MAIN menu screen before disconnecting the radio. Improper exits from the SERVICE screens may leave the radio in an improperly conÞgured state and result in seriously degraded radio or system performance. The SERVICE screens use the concept of the ÒSoftpotÓ, an analog SOFTware controlled POTentiometer used for adjusting all transceiver alignment controls. Each SERVICE screen provides the capability to increase or decrease the ÔsoftpotÕ value with the keyboard UP/DOWN arrow keys respectively. A F3 F4 F2 Transmitter Alignment MenuReceicer Alignment MenuSignaling Alignment Menu Service Menu F2 Front End Bandpass FilterF3 Rated Audio CalibrationF4 Squelch Attenuator (12.5 kHz)F5 Squelch Attenuator (20 kHz)F6 Squelch Attenuator (25 kHz) F2 DTMF F3 High SpeedF4 MDC1200 F2 Reference OscillatorF3 TX PowerF4 TX Deviation Balance (Comp)F5 TX Deviation LimitF6 TX Dev. Limit: Reference F9 TX Current Limit F8 Secure Tx DeviationF8 SECURE Rx Discriminator Level ! C a u t i o n
Radio Tuning Procedure6-3 graphical scale is displayed indicating the minimum, maximum, and proposed value of the softpot, as shown in Figure 6-3. Adjusting the softpot value sends information to the radio to increase (or decrease) a DC voltage in the corresponding circuit. For example, pressing the UP arrow key at the Reference Oscillator screen instructs the radio microprocessor to decrease the voltage across a varactor in the reference oscillator, which decreases the frequency. Figure 6-3 Softpot Concept In ALL cases, the softpot value is just a relative number corresponding to a D/ A (Digital-to-Analog) generated voltage in the radio. Tuning Procedure Perform the following procedures in the sequence indicated Reference Oscillator Alignment Adjustment of the reference oscillator is critical for proper radio operation. Improper adjustment will not only result in poor operation, but also a misaligned radio that will interfere with other users operating on adjacent channels. For this reason, the reference oscillator should be checked every time the radio is serviced. The frequency counter used for this procedure must have a stability of 0.1 ppm (or better). 1.From the SERVICE menu, press F2 to select TRANSMITTER alignment. 2.Press F2 again to select the REFERENCE OSCILLATOR softpot. 3.Press F6 to key the radio. The screen will indicate that the radio is transmitting. 4.Measure the transmit frequency on your frequency counter. 5.Use the UP/DOWN arrow keys to adjust the reference oscillator per the targets shown in Table 6-1. 6.Press F6 again to dekey the radio and then press F8 to program the softpot value. 7.Press F10, F10 to return to SERVICE menu. MAEPF-22858-O Min. ValueMax. Value 015 Note Band Target VHF ± 150 Hz UHF ± 150 Hz 800 MHz / 900 MHz0.3 ppm Table 6-1 Reference Oscillator Alignment
6-4Radio Tuning Procedure Transmitter Power The radio requires two power level adjustments, a high power or rated power adjustment, and a low power adjustment. ¥After POWER tuning, measure and note the DC current to the radio on each channel in the high power level. These values are needed for the Current Limit tuning. ¥The larger the softpot values, the lower the transmit power. 1.From the SERVICE menu, press F2 to select TRANSMITTER alignment. 2.Press F9 to select CURRENT LIMIT. Use the UP/DOWN arrow keys to set the softpot to zero. Press F8 to program the new value and press F10 to return to the TRANSMITTER alignment menu. 3.Press F3 to select the TRANSMIT POWER softpot. The screen will indicate the transmit test frequencies to be used. Note Radio ModelPower LevelTest Frequency RangeTransmit Power Setting VHF 25W25 Watts136-178 MHz24-26 Watts 5 Watts136-174 MHz5-7 Watts VHF 110W R1110 Watts136-162 MHz108-112 Watts 55 Watts136-162 MHz53-57 Watts VHF 110W R2110 Watts146-174 MHz108-112 Watts 55 Watts146-174 MHz53-57 Watts UHF 25W25 Watts403-470 MHz24-26 Watts 10 Watts403-470 MHz9-11 Watts UHF 10W10 Watts403-470 MHz9-11 Watts 5 Watts403-470 MHz5-7 Watts UHF 40W40 Watts403-470 MHz43-47 Watts UHF 110W R1110 Watts403-470 MHz108-112 Watts (98-103 Watts for test freq. F7) 55 Watts403-470 MHz53-57 Watts 800 MHz 15W15 Watts806-870 MHz16-18 Watts 7.5 Watts806-870 MHz8-9.5 Watts 3.75 Watts806-870 MHz4-5 Watts 800 MHz 35W35 Watts806-870 MHz37.5-39.5 Watts for test freqs. F1-F3 33-34.4 Watts for test freqs. F4-F7 17.5 Watts806-870 MHz19-20.5 Watts 8.75 Watts806-870 MHz9-10 Watts 900 MHz 12W13.5 Watts896-941 MHz13.5-15.5 Watts 6.0 Watts896-941 MHz6.5-8 Watts 3.5 Watts896-941 MHz3-4 Watts 900 MHz 30W30 Watts896-941 MHz33-34.5 Watts 6.0 Watts896-941 MHz8-9 Watts Table 6-2 Transmit Power Setting
Radio Tuning Procedure6-5 4.Press F6 to key the radio, and use the UP/DOWN arrow keys to adjust the transmit power per the value shown in Table 6-2. 5.Press F6 to dekey the radio, and then press F8 to program the value. Press ENTER to select next softpot frequency. 6.Repeat steps 4 and 5 for the remaining test frequencies. 7.Press F10 to return to the TRANSMIT menu. Transmit Current Limit After POWER tuning, measure and note the DC current to the radio on each channel in the high power level. These values are needed for the Current Limit tuning. Larger Softpot Values yield increased Cutback resulting in Lower Power . For 800/900 MHz radios tuning is done with three voltages: 11.8 V, 13.8 V and 15.5 V. 1.Press F9 to select the Current Limit softpot. The screen will indicate the transmit test frequencies to be used. 2.Select the frequency with the highest DC current drain as measured during the power tuning procedure. 3.Press F6 to key the radio and use the UP/DOWN arrow keys to adjust the transmit Current Limit until the power has reached the maximum nominal power of the radio (10, 12, 15, 25, 30, 35, 40, 55 or 110 Watts). If the value cannot be exactly tuned set the output power one step above the nominal value. 4.Increase the current limit setting by number of steps deÞned in Table 6- 3. 5.Press F6 to dekey the radio. 6.Press F8 to program the value. (The six other softpot values do not need tuning because only one Current Limit value is held in the radio). 7.Press F10 twice to return to the SERVICE menu. Transmit Deviation Balance (Compensation) Compensation alignment balances the modulation sensitivity of the VCO and reference modulation (synthesizer low frequency port) lines. Compensation algorithm is critical to the operation of signaling schemes that have very low frequency components (e.g. DPL) and could result in distorted waveforms if improperly adjusted. 1.Press F4 to select the TRANSMIT DEVIATION BALANCE softpot. The screen will indicate the transmit test frequencies to be used. Note ModelPowerSteps VHFall power levels3 UHFall power levels0 800 MHz/900 MHzall power levels3 Table 6-3 Current Limit Step Adjustment
6-6Radio Tuning Procedure 2.Begin with the lowest test frequency shown on the screen. 3.W ith Test Box RLN4460A: Set the test box METER OUT switch to the AUDIO IN position, and inject a 80 Hz tone at 100 mVrms into the AUDIO IN BNC connector. To ensure proper signal level measure on METER OUT jack with AC voltmeter. W ith Test Box GTF180B: Set the Test Box meter selector switch to the ÒGENÓ position, and inject a 80 Hz tone at 100 mVrms into the ÒAudio InÓ port. Connect an AC meter to the meter port to ensure the proper input signal level. 4.Press F6 to key the radio, then press F8 and measure deviation. Record this measurement. 5.Press F6 again to dekey the radio, and change the input tone to 3 kHz, 100 mVrms. 6.Press F6 to key the radio, then press F8 and use the UP/DOWN arrow keys to adjust the deviation to within ± 0.15 kHz of the value recorded in Step 4. 7.Press F6 to dekey the radio, and press F8 to program the softpot value. Press ENTER to move to next softpot value. 8.Repeat steps 3 - 7 for the remaining test frequencies. 9.Press F10 to return to the TRANSMIT menu. The step size change for step 6 is approximately 2.5% softpot value. Transmit Deviation Limit The transmit deviation limit softpot sets the maximum deviation of the carrier. Tuning is performed for 25 kHz channel spacing. Values for other channel spacings are calculated by the radio software. 1.Press F5 to select the TRANSMIT DEVIATION LIMIT softpot. The screen will indicate the transmit test frequencies to be used. 2.Begin with the lowest test frequency shown on the screen. 3.W ith Test Box RLN4460A: With the METER OUT switch set to MIC PORT, and METER OUT selector to MIC, inject a 1 kHz tone, 800 mVrms as measured on the AC/DC METER port. W ith Test Box GTF180B: With the meter selector switch set to GEN, inject a 1 kHz tone, 800 mVrms as measured on the METER port. Where ever possible tune for the top of the range. 4.Press F6 to key the radio, and use the UP/DOWN arrow keys to adjust the deviation until 4.6 kHz is just exceeded, then step down 1 kHz. 5.Press F6 to dekey the radio, and press F8 to program the softpot value. Press ENTER to move to the next softpot value. 6.Repeat steps 3 - 5 for the remaining frequencies shown on the screen. 7.Press F10 to return to the TRANSMIT menu. For SELECT 5 radios it is currently ESSENTIAL that the programming of the 25/ 30 kHz channel spacing is the last action before exiting this menu. The limit is 4.3 - 4.6 kHz, and although the softpot value will not normally need adjusting, the value must be programmed using the F8 key. Note Note
Radio Tuning Procedure6-7 Transmit Deviation Limit Reference This procedure is only required for VHF and UHF models with 20 kHz and 12.5 kHz channel spacing. These softpots set the deviation reduction ratio to transmit at 20 kHz or 12.5 kHz channel spacing. 1.Press F6 to select the TRANSMIT DEVIATION LIMIT 12.5/20 kHz softpot. 2.W ith Test Box RLN4460A: With the meter selector switch set to MIC, inject a 1 kHz tone on the AUDIO IN terminal on the test set, 400 mVrms as measured on the AC/DC MTR port. W ith Test Box GTF180B: With the meter selector switch set to GEN, inject a 1 kHz tone, 400 mVrms as measured on the METER port. 3.Press F6 to key the radio, then press F8 and use the UP/DOWN arrow keys to adjust the deviation until 4.6 kHz is just exceeded, then step down 1 kHz. Tune as close to the upper range as possible 4.Press F6 to dekey the radio, and press F8 to program the softpot value. Press Enter to move to next softpot value. 5.Repeat steps 2 - 4 for the remaining channel spacings. 6.Press F10 to return to the TRANSMIT menu. For radios with Conventional Select 5 Signaling software it is currently ESSENTIAL that the programming of the 25/30 kHz channel spacing is the last action before exiting this menu. The limit is 4.3 - 4.6 kHz and although the softpot value will not normally need adjusting the value must be programmed using the F8 key. Signaling Deviation On radios with Conventional Select 5 Signaling software skip the next three steps and go to ÒDTMF Transmit Deviation (GVN6011 only)Ó on page 6-8 and ÒSelect 5 Transmit Deviation (GVN6011 only)Ó on page 6-9. DTMF Transmit Deviation The DTMF Deviation Softpot is used to tune the FFSK signaling deviation. 1.From the SERVICE menu, press F4 to select SIGNALING alignment. 2.Press F2 again to select the DTMF softpot. 3.Press F6 to key the radio on the test frequency. The screen will indicate that the radio is transmitting. 4.Measure the DTMF deviation on your service monitor. 5.Use the UP/DOWN arrow keys to adjust the DTMF deviation per Table 6- 4. Note Note Note Channel Spacing (kHz) DTMFTrunkingMDC 25 / 303.05-3.402.5-3.53.25-3.75 20 (VHF/UHF)2.44-2.762.0-2.82.6-3.0 12.51.55-1.851.25-1.751.62-1.88 Table 6-4 Signaling Deviation
6-8Radio Tuning Procedure 6.Press F6 again to dekey the radio. 7.Press F8 to program the softpot value; press F10 twice to return to the SERVICE menu. High Speed Deviation 1.From the SERVICE menu, press F4 to select SIGNALING alignment 2.Press F3 to select the TRUNKING HIGH SPEED softpot. 3.Press F6 to key the radio on the test frequency. The screen will indicate that the radio is transmitting. 4.Measure the TRUNKING HIGH SPEED deviation on your service monitor. 5.Use the UP/DOWN arrow keys to adjust the TRUNKING HIGH SPEED deviation per Table 6-4. 6.Press F6 again to dekey the radio. 7.Press F8 to program the softpot value; press F10 twice to return to the SERVICE menu. MDC 1200 Deviation 1.From the SERVICE menu, press F4 to select SIGNALING alignment 2.Press F4 again to select the MDC softpot. 3.Press F6 to key the radio on the test frequency. The screen will indicate that the radio is transmitting. 4.Measure the MDC deviation on your service monitor. 5.Use the UP/DOWN arrow keys to adjust the MDC deviation per Table 6- 4. 6.Press F6 again to dekey the radio. 7.Press F8 to program the softpot value; press F10 twice to return to the SERVICE menu. DTMF Transmit Deviation (GVN6011 only) This tuning sequence is ONLY for radios with Conventional Select 5 Signaling software being tuned with the RSS GVN6011. The DTMF Deviation Softpot is used to tune the FFSK signaling deviation. Tuning is performed at one frequency and for 25 kHz channel spacing. The radio generates a DTMF signal for tuning. Values for other frequencies and channel spacings are calculated by the radio software. 1.From the RADIO TUNE menu, press F4 to select SIGNALING alignment. 2.Press F4 again to select the DTMF softpot. 3.Press F6 to key the radio on the test frequency. The screen will indicate that the radio is transmitting. 4.Measure the DTMF deviation on your service monitor. 5.Use the UP/DOWN arrow keys to adjust the DTMF deviation to be within 3.05 and 3.45 kHz. 6.Press F6 again to dekey the radio. 7.Press F8 to program the softpot value; press F10 to return to the SIGNALING menu. Note