Maxon Telecom SP200, SP210 service manual Squelch Sensitivity, Transmitter Alignment, Tcxo

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SP200/210

Maxon SP200/210 Radio

Rx VCO

a.Select Channel 1.

b.Check that the VCO tuning voltage at TP1 is >5.7V +/- 0.25V (VHF) or >1.0V +/- 0.25V (UHF).

c.Select Channel 3

d.Check that the voltage at TP1 is <12.5V.

Tx VCO

a.Select Channel 1.

b.Set the PTT switch to on and check that the voltage at TP1 is 1.0V +/- 0.25V (VHF) or 2.0V +/- 0.25V (UHF).

c.Select Channel 3.

d.Check that the voltage at TP1 is <12.5V.

e.Set the PTT switch to off.

Note: If TP1 is below 0.6V or above 12.5V, in any of the above tests, L203 may be adjusted. L203 is covered in wax and therefore great care will need to be taken when removing the wax.

TCXO

a.Select Channel 2.

b.Set the PTT switch to on.

c.Using the frequency counter, adjust the TCXO control, so that the transmit frequency is within +/- 200Hz of the required frequency.

d.Set the PTT switch to off.

If no further alignment is to be carried out, it may be necessary to check the squelch setting.

4.5.4 Squelch Sensitivity

The RF input level to open the squelch is usually set in the range –123.5 to –117dBm (0.15 to 0.3mV). The squelch should open at a SINAD between 7 and 12dB (no CCITT).

The squelch should close between 2 and 4dB of the value at which it opens.

RV2 sets the squelch level for 12.5kHz channel spacing and RV4 sets the squelch level for 20/25kHz channel spacing.

Note: RV2 MUST be set before RV4.

4.5.5 Transmitter Alignment

Power Adjustment

See Section 4.4.

Issue 1.0	INSTALLATION, COMMISSIONING & ALIGNMENT
03/01	Page 4-11

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Contents SP200/210 NSW Australia Tel +61 0 2 9707 Amendment Record Sheet Issue No Effective Date Reason for Change SignatureAmendment Record Sheet Maxon SP200/210 Radio Table of Contents 11.4 Default Settings 11-8 SL100 UHF Parts List10-1 11-1List of Tables Maxon SP200/210 Radio Issue 03/01 Introduction Using this ManualAmendments to this Manual Category C Engineering BulletinContact Information General SpecificationsPhysical Dimensions Synthesiser Environmental Operating Temperature RangeVibration ESD EMCPre-Install Check Accessories Accessories & OptionsOptions Accessories & Options Installation INSTALLATION, Commissioning & AlignmentINSTALLATION, Commissioning & Alignment ConnectionsRecommended Test Equipment CommissioningCommissioning Kit Commissioning EquipmentDiscrete Test Equipment Test Equipment Set-up using Discrete Test EquipmentSK 3100 Service Kit Transmitter Performance Tests Test Equipment ConnectionReceiver Performance Tests Squelch Power AdjustmentAudio Output Alignment Tests without DisassemblyPreparation VHFRemoving and Replacing Battery Disassembly and Re-assembly of the RadioRemoving and Replacing the Belt Clip Location of Adjustment Points Removing and Replacing the Main AssemblyPLL Alignment Transmitter Alignment Squelch SensitivityTcxo Radiocommunications Test SET Audio deviation adjustment Balance AdjustmentCtcss / DCS deviation At maximum volume, nominal distortion is 10% Audio Volume LevelReceiver Alignment Introduction Detailed Functional DescriptionCommon Circuits EepromAudio Asic Audio Signal PathMiscellaneous Signals and Controller Sat Signal PathAudio/SAT Circuits LEDs and indicators Battery Low Indicator CircuitCommon RF Circuits PLL SynthesiserOut-of-Lock Detector PLL ICCharge Pump and Loop Filter DC to DC ConverterAutomatic power control APC circuits Antenna SwitchTransmitter PA moduleFront End ReceiverSecond mixer, Second IF, FM detector First MixerSquelch Mute Circuit 16kHz Band Pass FilterAF Output Low Pass Filter Noise detector circuitSpeaker Audio Amplifier Diagnostic Function TroubleshootingDiagnostics TroubleshootingIf IC Troubleshooting ChartTransistors Main Circuit Voltage ChartsMain Circuit Transistor Voltages Integrated Circuit Voltages Receive Integrated CircuitsIntegrated Circuit Voltages Transmit Troubleshooting Troubleshooting Troubleshooting Troubleshooting SMP6100 ProgrammingIntroduction Getting StartedScanning Select Features MenuProgram/Print/Save Program RadioSave Data to Disk Print DataMaxon SP200/200 Radio SP200/210 Parts List Exploded Mechanical Drawings & Parts ListsExploded Mechanical Drawings & Parts Lists Spare PartsSL100V2 SL100U2For details on servicing, please refer to Section Mechanical PartsLCD TTR 1866 Dpfdpw Parts List for Exploded Mechanical DrawingSKPT-110VA PCB LCDSML-020MLTT86 SMD NUT M7 BsbmPCB VCO PCB RF Bsbm M2.6 AldcV2 Control Circuit SL100 VHF Parts List05B-000-5Z Chip Ceramic 0.001UF GRM39 X7R102K 50V P Diode Switching KDS181S A3Chip Ceramic 0.012UF GRM39 X7R123K 25V P Chip Ceramic 0.0022UF GRM39 X7R222J 50V PSW Tact SKPT-1101VA 2 V2 RFRES.CHIP Trimmer 10K RH03E1C14X RES.CHIP Trimmer 1K RH03E1C13XThermistor Chip 33KNTCCS32163SH333KC TH1 Elect Capacitor 10UF 16V 20%Chip Ceramic 39PF GRM40 COG390J 50V P RE Power Module GNOK-M68776-E01 IC9Chip Ceramic 43PF GRM40 COG430J 50V P Chip Ceramic 47PF GRM39 COG470J 50V PTcxo Assembly 5 V2 Front End 4 V2 VCOU2 Control Circuit SL100 UHF Parts ListConnector Waffer Chip Resistor 12K 2 U2 RFChip Resistor 18K Chip Resistor 39KChip Ceramic 0.0015UF GRM39 X7R152K 50V P RES.CHIP Trimmer K RH03E1C13XChip Ceramic 10PF GRM40 COG100C 50V P Chip CeramicChip Ceramic 2.2PF GRM40 COG2R2C 50V P Power Mpduleuhf M68732HGNOK IC9Chip Ceramic 470PF GRM40 COG471J 50V P Chip Ceramic 4.7PF GRM40 COG4R7C 50V PCoil Chip 18NHLL2012-F18NM TcxoCoil Spring X0.35X7TR Coil Spring 2X0.75X3TL SMD4 VCO Maxon SP200/210 Radio Circuit Diagrams & PCB Layouts Circuit Diagrams & PCB LayoutsRF PCB TcxoCircuit Diagrams & PCB Layouts Digital Board Layout Top Side Digital Board Layout Bottom Side RF Board Layout Top Side Issue RF Board Layout Bottom Side P406787a Front End Front-End Board Layout Tcxo Board Layout 10SPARE Parts Spare Parts & Maintenance Policy10.1Spare Parts Surface mount component replacement Component ReplacementSurface mount components Surface mount removalSurface mounted integrated circuit replacement Spare Parts & Maintenance Policy 11.1Purpose 11APPENDIX ACC-2003 Alignment BOX11.2Test Equipment 11.3Calibration ProgramAppendix a ACC-2003 Alignment BOX Calibration Program Primary ScreenAsic Control Screen Rx TXTRIM2 Adjustment of Asic valuesTXTRIM3 RX VOL SAT Balance Transmit AdjustmentsSAT Deviation Audio Output Level Receive Adjustments11.4.1 V1 Band Default Settings 11.4Default SettingsV1 Default Frequency Table V1 Default Asic SettingsV2 Default Frequency Table 11.4.2 V2 Band Default SettingsV2 Default Asic Settings U1 Default Frequency Table 11.4.3 U1 Band Default SettingsU1 Default Asic Settings U2 Default Frequency Table 11.4.4 U2 Band Default SettingsU2 Default Asic Settings