Sailor RE2100 Technical Manual

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S.P. RADIO A/S

AALBORG

DENMARK

TECHNICAL MANUAL

FOR

COMPACT HF SSB RE2100

Please note

Any responsibility or liability for loss or damage in connection with the use of this product and the accompanying documentation is disclaimed.

The information in this manual is furnished for informational use only, is subject to change without notice, may contain errors or inaccuracies, and represents no commitment whatsoever.

This agreement is governed by the laws of Denmark. Doc. no.: M2100GB Issue: B/0401

RE2100

CONTENTS

1 GENERAL INFORMATION

1.1 INTRODUCTION 1-1

1.2 DESCRIPTION OF SAILOR HF SSB PROGRAMME 1-1

1.3 GENERAL DESCRIPTION OF SAILOR HF SSB RE2100 1 - 2

1.4 TECHNICAL DATA (complies with SOLAS, ITU, CEPT, MPT, DOC, FTZ, KSR, FCC) 1-3

1.5 CONTROLS 1-5

1.6 PRINCIPLE OF OPERATION 1-7

2 INSTALLATION

2.1 MOUNTING POSSIBILITIES 2-1

2.2 DIMENSIONS AND DRILLING PLAN 2-3

2.3 ELECTRICAL CONNECTION AND ASSEMBLING 2-8

3 SERVICE

3.1 MAINTENANCE 3-1

3.2 ALIGNMENT INSTRUCTIONS 3-1

3.3 PROPOSAL FOR NECESSARY TEST EQUIPMENT 3-2

3.4 TROUBLE SHOOTING 3-7

3.5 PERFORMANCE CHECK 3-9

3.6 MODULE PERFORMANCE CHECK 3-21

3.7 ADJUSTMENT PROCEDURE 3-47

3.8 NECESSARY ADJUSTMENT AND CHECK AFTER REPAIR 3-56

3.9 FUNCTION CHECK 3-58

3.10 SELECTION AND DESCRIPTION OF THE SERVICE PROGRAMMES 3-60

4 MECHANICAL DISASSEMBLING AND MODULE LOCATION

4.1 ADJUSTMENTS AND LOCATIONS 4-1

5 CIRCUIT DESCRIPTION AND SCHEMATIC DIAGRAMS

5.1 RECEIVER UNIT (MODULE 1) PART NO. 625631 5-1

5.2 FRONT END UNIT (MODULE 2) PART NO. 625632 5-9

5.3 SYNTHESIZER UNIT (MODULE 3) PART NO. 625633 5-13

5.4 EXCITER UNIT (MODULE 4) PART NO. 625634 5-23

5.5 PROCESSOR UNIT (MODULE 5) PART NO. 625635 5-29

5.6 KEYBOARD UNIT (MODULE 6) PART NO. 625636 5-35

5.7 DISPLAY UNIT (MODULE 7) PART NO. 625637 5-37

5.8 POWER UNIT (MODULE 8) PART NO. 625638 5-41

5.9 INTERCONNECTION CABLE PLAN 5-45

6 MICROTELEPHONE INSTALLATION

6.1 NORMAL INSTALLATION RE2100 AND C2140 6-3

6.2 NORMAL INSTALLATION RE2100 OR C2140 WITH 2 MICRO TELEPHONES 6-4

6.3 MECHANICAL DIMENSIONS FOR HANDSET 6-5

7 PARTS LIST

RE2100

CONTENTS

1 GENERAL INFORMATION

1.1 INTRODUCTION 1-1

1.2 DESCRIPTION OF SAILOR HF SSB PROGRAMME 1-1

1.3 GENERAL DESCRIPTION OF SAILOR HF SSB RE2100 1 - 2

1.4 TECHNICAL DATA (complies with SOLAS, ITU, CEPT, MPT, DOC, FTZ, KSR, FCC) 1-3

1.5 CONTROLS 1-5

1.6 PRINCIPLE OF OPERATION 1-7

PAGE 1-1

9324

1 GENERAL INFORMATION

1.1 INTRODUCTION

SAILOR Compact HF SSB RE2100 is the control unit in SAILOR Compact HF SSB Programme 2000. SAILOR Compact HF SSB Programme 2000 is a powerful, advanced, high technology short wave

communication system which is extremely easy to operate. It has been developed on the basis of S. P. Radio’s many years of experience with short wave

communication equipment. It has the same high reliability as all SAILOR equipment is known for. It is extremely easy to operate:

1. Select frequency.

2. Make your call when the tune lamp has been extinguished.

It has been constructed so that it fits in with the other units in the SAILOR Compact Programme 2000.

1.2 DESCRIPTION OF SAILOR HF SSB PROGRAMME

The SAILOR HF SSB programme is designed to meet all requirements within HF radio communication. The SAILOR HF SSB programme consists of one main control unit and three transmitters with different

power levels (250W, 600W, 1200W PEP). To obtain maximum performance, the systems are designed with aerial couplers, which can be mounted

outdoors. All the aerial couplers have automatic tuning. Each of these three systems can be extended with:

- remote control units C2140

- telex/DSC sscanning receiver with built-in modem RM2151

- DSC MF/HF watchkeeping receiver with built-in modem RM2150

- duplex receiver R2120 The system may be supplied for 24V DC or 110/220V AC power source. For the system there are following battery chargers available:

- 30 amp battery charger N2174

- 3 x 30 amp battery charger 2 x N2174

- 60 amp battery charger N2174 Dual These battery chargers can be used to charge maintenance free lead-acid batteries and Nickel Cadmium

batteries. The 600W PEP and 1200W PEP transmitters and power supplies are built up of the following units:

RE2100

1 GENERAL INFORMATION RE2100

PAGE 1-2

9324

1) TX control unit, consisting of output filter, power supply, and audio amplifier for RE2100 and the TX-processor.

2) Power amplifier unit, consisting of a 600W power amplifier.

3) Combiner unit, consisting of power splitter and power combiner.

4) 24V DC power unit, consisting of a 24V DC to 28V and 42V DC switch mode power supply, which supplies the power amplifier unit.

5) 110/220V AC power supply unit, consisting of a 110/220V AC to 28V DC and 42V DC thyristor controlled power supply, which supplies the power amplifier unit.

1.3 GENERAL DESCRIPTION OF SAILOR HF SSB RE2100

SAILOR HF SSB RE2100 is an all solid state constructed microcomputer controlled SSB short

wave telephony receiver and exciter.

SAILOR HF SSB RE2100 covers the frequency range from 100 kHz to 30 MHz in receive mode and

from 1.6 MHz to 30 MHz in transmit mode.

SAILOR HF SSB RE2100 can operate in both simplex and semi-duplex.

SAILOR HF SSB RE2100 includes all ITU channels from 4 MHz to 25 MHz. SAILOR HF SSB RE2100 includes channel scanning facilities. SAILOR HF SSB RE2100 includes 100 quick select frequency pairs. SAILOR HF SSB RE2100 has continuous tuning in receive mode. SAILOR HF SSB RE2100 has clarifier function ±150 Hz in 10 Hz steps. SAILOR HF SSB RE2100 is fully synthesized and has a high stability reference oscillator (TCXO). SAILOR HF SSB RE2100 has an easy to read display with red light figures. SAILOR HF SSB RE2100 has a push-button keyboard offering an attractive tactile feeling and a

safe finger-guide in the metal front. The keyboard is fitted with night-

illumination of the lettering. SAILOR HF SSB RE2100 has one key operation of the distress frequency 2182 kHz. SAILOR HF SSB RE2100 has integral two tone alarm signal generator in accordance with SOLAS. SAILOR HF SSB RE2100 has a special serial input (SP-BUS) enabling RE2100 to communicate

with other units.

1 GENERAL INFORMATION RE2100

PAGE 1-3

9324

1.4 TECHNICAL DATA (complies with SOLAS, ITU, CEPT, MPT, DOC, FTZ, KSR, FCC)

GENERAL Frequency Range: Receiver: 100 kHz to 30 MHz

Transmitter: 1.6 MHz to 30 MHz

Modes: J3E (USB/LSB), R3E and H3E (AM) Channel Capacity: 100 user defined quick-select channels and ITU defined channels in the

maritime bands. Each channel contains both RX and TX frequency and mode settings.

Scanning Facilities: 10 scanning prograammes, each able to contain

128 pairs of frequencies.

Distress Call: Quick selection of 2182 kHz

Built-in two tone alarm: 1300 Hz and 2200 Hz with a duration of 45 secs.

Operating Temperature Range: -15°C to +55°C Frequency Stability: Better than 0.34 ppm Primary Voltage: 24V DC - 10% +30% Current Drain: Receiver (standby)0.9A

Transmit voice 7A Transmit two-tone 13A (T2130)

Aerials: from 7 - 15 m

TRANSMITTER T2130 Power Output: 250W PEP ±1.4 dB (T2130/I 240W PEP max.) Intermodulation: better than 32 dB below PEP Spurious Emission: better than 67 dB below PEP Harmonics: better than 43 dB below PEP or

better than 67 dB below PEP with aerial coupler AT2110

Carrier Suppression: better than 46 dB below PEP Audio Response: 350 Hz to 2700 Hz at -6 dB

RECEIVER RE2100 Receive System: Double conversion super heterodyne

1st IF 70 MHz. 2nd 10.73 MHz

Selectivity: J3E (SSB) 350 Hz to 2700 Hz at -6 dB

H3E (AM) ±3.3 kHz at -6 dB

Sensitivity: J3E (SSB) <10 dB/uV for 20 dB SINAD

H3E (AM) <24 dB/uV for 20 dB SINAD

1 GENERAL INFORMATION RE2100

Spurious and IF Rejection: better than -70 dB Cross Modulaton: better than 90 dB/uV (CEPT method of test) Desensitization: better than 100 dB/uV (CEPT method of test) AGC: less than 2 dB audio level change from 10 dB/uV to 80 dB/uV.

Fast attack, slow release time.

Intermodulation: better than 90 dB/uV (CEPT method of test) Spurious Emission: better than 1 nW into dummy aerial Clarifier: ±150 Hz in steps of 10 Hz Squelch: Voice activated, opens for SINAD >6 dB Audio Power: 5 Watt, 8 ohm, less than 10% distortion

10 Watt, 4 ohm, less than 10% distortion

AERIAL COUPLER AT2110 Power: 250W PEP Aerials: 7 - 15m Temperature Range: -25°C to +70°C Tuning Time: Typically less than 2 secs (learn mode typ. 30 secs)

ACCESSORIES Loudspeaker: H2054 see special brochure

H2074 see special brochure

Power Supplies: N2160

Input supply: 12V + 30% - 10%

For more information see the manual for N2160

N2161

Input supply: 110V - 127V - 220V - 240VAC

Input frequency: 50 - 60 Hz

For more information see the manual for N2161 Weight: RE2100: 4.5 kg

T2130: 14 kg

AT2110: 4.5 kg

PAGE 1-4

9324

1 GENERAL INFORMATION RE2100

PAGE 1-5

9331

1.5 CONTROLS

29045

VOL O F F

MODE

DEL

ENT

STOP

8 9

DIM

LOAD

AGC

POWER

ADD

DUMMY

TUNE

CLARIF

TEST ALARM

2182

FREQ

ALARM

SEND

FREQ

POWER

SIGNAL AE

.5 21 3

RX kHz

kHz

CURRENT

VOL

Volume control and on/off switch for the mains.

Manual RF gain control.

FREQ

Tunes the receive frequency down.

FREQ

Tunes the receive frequency up.

CLARIF

TUNE

Switches between clarifier (10 Hz steps) and tune of receive frequency.

Selects receive functions or converts a channel number to the corresponding frequency.

Selects channel functions.

Selects transmit functions or converts a channel number to the corresponding frequency.

POWER

AGC

Reduce/increase the transmitter output power.

LOAD

DUMMY

DIM

Selects the built-in dummy load in the aerial coupler, and the TX frequency

2206.4 kHz is automatically selected.

1 GENERAL INFORMATION RE2100

9331

PAGE 1-6

SEND ALARM

Transmits the distress signal when pressed together with TEST ALARM.

2182

Selects the distress frequency 2182 kHz.

ALARM

TEST

Acoustic check of the alarm signal generator.

LOAD

DUMMY

DIM

Reduces/increases the display light and switches on/off the display and keyboard panel illumination.

POWER

AGC

Switch the AGC function on/off.

ADD

Switches the squelch function on/off.

DEL

MODE

Selects modulation type J3E, R3E, H3E and J3E lower side band. (J3E lower side band is optional).

Selects the scan programme.

Digits from 1 to 9 and 0.

STOP

ENT

Terminates the keying-in sequence, stops the alarm signal, stops the scanning, and stops the TX tuning.

Sets the decimal point for the frequency in kHz.

(Digits 0-99)

ADD

Adds the RX/TX frequency to the channel number.

(Digits 0-99)

DEL

MODE

Deletes the RX/TX frequency from the channel.

CLARIF

TUNE

Resets the tune memory at the selected frequency and starts a new tune-up cycle.

1 GENERAL INFORMATION RE2100

PAGE 1-7

9324

1.6 PRINCIPLE OF OPERATION

SAILOR Compact HF SSB RE2100 is the control unit in SAILOR Compact HF SSB Programme 2000. It contains following circuits.

PROCESSOR UNIT

This unit controls all modules and operate as interface between the user and the radio (keyboard, display). Nearly all communication from the microprocessor to the modules is done on an internal serial bus (SPI). The unit holds all memory, and all user defined memory is in an EEPROM, so even when supply voltage is removed, the contents of the memory is preserved. If the supply voltage to the RE2100 gets too low, the display will show error 20, and the performance of the RE2100 will be reduced. There is also an external serial bus (SP-Bus). This bus is used to communicate with other units in the SAILOR Compact HF SSB Programme 2000, e.g. the transmitter T2130. The microprocessor also generates the alarm tones (1300 Hz, 2100 Hz).

DISPLAY UNIT

This unit contains the display and the field strength meter.

SYNTHESIZER UNIT

This unit contains all frequency generating parts. There is only one reference oscillator which is a temperature compensated crystal oscillator (TCXO) with a frequency of 10.73 MHz. Both receiver and exciter are using two LO-signals. These signals are generated in two separate PLL’s, one having output frequencies from 70 MHz to 100 MHz and the other having output frequencies of 59.27 MHz and 80.73 MHz. The synthesizer which covers from 70 to 100 MHz is a fractional synthesizer with a resolution of 10 Hz. The other synthesizer is a conventional synthesizer. It has two output frequencies, one for lower sideband

80.73 MHz and another for upper sideband 59.27 MHz.

RECEIVER FRONT END

This unit contains input protection circuit, input filters, mixer and 70 MHz IF. The input filter is a mixture of lowpass, highpass and bandpass filter to obtain max. performance in the entire band from 100 kHz to 30 MHz. The mixer is a FET mixer with a high level LO-injection to give the mixer good high signal quality. The mixer is followed by a 70 MHz bilitic quartz filter with a bandwidth of 15 kHz.

RECEIVER UNIT

This unit contains all necessary circuits to convert a 70 MHz IF signal to an audio signal. It starts with the second mixer which is a FET mixer. From the mixer the signal is fed to a high order monolitic quartz filter, one for AM and one for SSB. The type of filter is selected from the microprocessor. From the filter the signal is fed to the 10.73 MHz IF amplifier. The gain of this amplifier is regulated from the AGC amplifier. The regulated IF amplifier is followed by a ceramic filter to reduce the wideband noise. The signal is from here fed to the demodulator, which can operate as an SSB detector or an AM detector controlled from the microprocessor. The detector is followed by a filter circuit. In AM mode the filter width is from 70 Hz to 3000 Hz, and in SSB mode the filter is from 300 Hz to 3000 Hz. From here the AF signal passes some switches and then it is amplified in three AF amplifiers, one for the microtelephone earpiece, one for the 0 dBm output, and an amplifier with volume control for the AF signal to the AF power amplifier in T2130. The signal from the AF filters is also fed to the voice controlled squelch. This contains a limiting amplifier, a frequency to voltage converter, and a threshold amplifier. On/off switching of the squelch is controlled by the microprocessor. In scan mode the squelch is used to detect if there is signal on the channel in question.

1 GENERAL INFORMATION RE2100

EXCITER UNIT

This unit contains all necessary circuits to generate an SSB/AM signal in the frequency range from 1.6

- 30 MHz. It starts with a compressor and AF amplifier. The AF signal is fed to the balanced modulator to produce a double sideband signal on 10.73 MHz. The DSB signal is fed to the LSB filter where only the

lower sideband passes through. The LSB signal is fed to a step attenuator, which is controlled from the microprocessor. From the step attenuator the signal is fed to the first mixer, and the frequency is converted to 70 MHz. If 59.27 MHz LO-signal is used, the signal will be lower sideband. If 80.73 MHz LOsignal is used, the signal will be upper sideband. From the mixer the signal is fed to an amplifier, 70 MHz crystal filter and an amplifier. From the amplifier the signal is fed to the second mixer which converts the frequency from 1.6 MHz to 30 MHz. After the mixer a lower side signal is converted to an upper sideband signal, and an upper sideband signal is converted to a lower sideband signal. The output of the mixer is fed to the power unit.

POWER UNIT

This unit contains the final amplifying and filtering of the RF signal, and produces all necessary supply voltages for the modules in RE2100. The signal from exciter unit is first amplified, then filtered in a 30 MHz lowpass filter and then amplified to a level of approx. 2 mW. The input voltages from T2130 is ±18V and 9V. These voltages passes through seven series regulators to produce the necessary supply voltages to RE2100. A special ±15V for the exciter is controlled from the microprocessor, so when the transmitter has not been used for two minutes, it is switched off to reduce the power consumption in standby.

9324

PAGE 1-8

1 GENERAL INFORMATION RE2100

PAGE 1-9

9324

BLOCK DIAGRAM RE2100

4-0-25751C

SYNTHESIZER

POWER (MODULE 8)

EXCITER (MODULE 4)

KEY BOARD

(MODULE 6)

DISPLAY

(MODULE 7)

PROCESSOR

(MODULE 5)

RECEIVER (MODULE 1)

RECEIVER FRONT END

(MODULE 2)

(MODULE 3)

TCXO

Buffer

2nd

Divider Divider

Reference

detector

Phase

Filter

Loop

logic

Control

Mirror

Current

Logic

1/n Curr.

Fraction

overflow

Adder

clock

Sum latch

Converter

A/D

Reference

Divider

2nd

Divider

Phase

detector

Loop

Filter

92.5-85MHz

VCO II

100-92.5MHz

VCO I

85-77.5MHz

VCO III

77.5-70MHz

VCO IV

Shift reg.

VCO 1

VCO 2

Prescaler

divider

Programmed

VCO-Buffer

Prescaler

Programmed

divider

Prescaler

LO-Buffer

buffer

Prescaler

buffer

VCO-Buffer

LO-Buffer

Modulus

Control

Logic

Filter

Bandpass

18-30MHz

9-18MHz

Bandpass

Filter

4.5-9MHz

Bandpass

Filter

1.6-4.5MHz

Bandpass

Filter

0.385-1.6MHz

Bandpass

Filter

0.385MHz

Lowpass

Filter

Lowpass

30MHz

Highpass

Filter Filter

70MHz

Shift reg.

1.st

Mixer

1.st LO

Buffer

300kHz BW

LSB-Filter

10.73MHz

AM-Filter

2.nd

Mixer

2.nd

Lo-buffer

AMP

SSB/AM Demodulator

AGC

Detector

Hang Time

AGC

AMP

AGC

3 kHz

Lowpass

70 Hz

Highpass

300 Hz

Highpass

Frequency

to voltage

converter

Threshold

Limeting

AMP

Buffer

AMP

S-Meter

AMP

0 dBm

AMP

Buffer Amp

Loudsp.

AMP

Earpiece

Filter

Bandpass

H1G1

SSB/AM

Squelch Switch

Loudsp. Switch

Earpiece Switch

0 dBm Switch

Aux AF Switch

Mic. Switch

S-Meter on/off

SSB/AM

Det. Mute

Dependent

on Squelch

Independent

on Squelch

Tune/Alarm/Ringing

Tones on/off

Volume contr.

Switch

Distress

driver

Tune/alarm

generator

u-Processor

select

SPI-adress

+5V power

supply

-5V power

supply

+5V power

supply

Watch dog

EPROM

EEPROM

Keyboard

buffer

SCI-baud

Rote-gen

SCI-TxSCI-Rx

Keyboard

4x8 Matrix

EPROM

Rx and Tx

Meter

Display

driver

Meter

driver

Dimmer

Dummy load

Tune

AF-

compressor

Balanced

Modulator

Modulations

Level-control

Mode-

selector

Carrier

buffer

Carrier

Insertion

Step

attenuator

Carrier

Level-control

LSB-filter

10.73MHz

Mixer

1.st

70 MHz

IF AMP

70 MHz

Filter

AMP

70 MHz

2.nd

Mixer

LO-buffer

Shift reg.Shift reg.

Lowpass

Filter

Supply

Rx/Tx

Switch

Rx/Tx

Mute

ResetExVAPI

Sample/Hold

1.6-30 MHz

-18V

+18V from T2130

+9V

-18V

+18V

+15V

-15V

+5V

+3.5V

-15V

+15V

To exciter module

To all modules

To processor module

To display module

LO2 EX 70-100 MHz

59.23/80.73 MHz LO1 EX

10.73 MHz

RF on/off

Ex on/off

AF-selector

Mode-selector

Mode Ex

ATT Ex

Switch

Rx/Tx

Telex

Alarm/tune tones

Mic. in

RF in/out

to T2130

Hang AGC on/off

Shift Register 1

Shift Register 2

H2G2

F2E2D2C2B2A2

A1B1C1D1E1 F1

G1 H1

SSB/AM

Manual RF-gain

10.73MHz

LO2 Rx 59.27 MHz/80.73 MHz

AGC on/off

Volume contr.

Squelch reset

SP-bus

VF/AE-current

Rx Mute

Hand Key

DATA-BUS/8

ADRESS-BUS/16

Ex RF

AUX AF to TX

Distress out

Mic in

0 dBm output

Ext. RF-gain controle

To microtelephone edv.

AF to AFamp. T2130

102

Control on/off

Vref

Limit

Amp

Carrier Reinjection for SSB 10.73 MHz

LO1 Rx 70-100 MHz

RE2100

CONTENTS

2 INSTALLATION

2.1 MOUNTING POSSIBILITIES 2-1

2.2 DIMENSIONS AND DRILLING PLAN 2-3

2.3 ELECTRICAL CONNECTION AND ASSEMBLING 2-8

PAGE 2-1

RE2100

2 INSTALLATION

2.1 MOUNTING POSSIBILITIES

TABLETOP AND DECKHEAD

Mounting bracket H2055 which offers the same possibilities for the loudspeakers H2054 and H2074.

Mounting kit H2068 and H2055

4-0-25931,4-0-25932,4-0-25933

2 INSTALLATION RE2100

PAGE 2-2

BULKHEAD AND CONSOLE

Mounting kit H2063 which offers the same possibilities for the loudspeakers H2054 and H2074.

Mounting kit H2062 or

Mounting kit H2064.

IN CONJUNCTION WITH OTHER SAILOR EQUIPMENT

Look up the INSTALLATION section for the SAILOR unit in question

4-0-25926,4-0-25927

2 INSTALLATION RE2100

PAGE 2-3

2.2 DIMENSIONS AND DRILLING PLAN

UNIVERSAL MOUNTING BRACKET H2055

Permits a wide variety of installation possibilities, such as tabletop, bulkhead or deckhead. For other possibilities such as console installation, the SAILOR 19" rack or all units in the Compact programme assembled on the bulkhead, see special information concerning installation of the Compact programme.

WEIGHT Mounting kit H2055: 1.5 kg Loudspeaker H2054: 5.5 kg Loudspeaker H2074: 4.0 kg HF SSB RE2100: 4.5 kg

4-0-25930,4-0-25922

2 INSTALLATION RE2100

PAGE 2-4

4-0-25934, 4-0-25928, 4-0-25929

MOUNTING KIT H2068 AND H2055

WEIGHT Lashing kit H2068: 1.5 kg Mounting kit H2055: 1.5 kg Loudspeaker H2054: 5.5 kg Loudspeaker H2074: 4.0 kg HF SSB RE2100: 4.5 kg

2 INSTALLATION RE2100

PAGE 2-5

MOUNTING KIT H2063

Free distance must be kept to allow free air circulation ambient temperature max. 40°C.

WEIGHT Mounting kit H2063: 1.0 kg Loudspeaker H2054: 5.5 kg Loudspeaker H2074: 4.0 kg HF SSB RE2100: 4.5 kg

4-0-25935, 4-0-25936, 4-0-24703

2 INSTALLATION RE2100

MOUNTING KIT H2064

Free distance must be kept to allow free air circulation ambient temperature max. 4o°C.

WEIGHT Mounting kit H2064: 1.5 kg Loudspeaker H2054: 5.5 kg Loudspeaker H2074: 4.0 kg HF SSB RE2100: 4.5 kg

4-0-25937, 4-0-24704, 4-0-25942

PAGE 2-6

2 INSTALLATION RE2100

MOUNTING KIT H2062

Free distance must be kept to allow free air circulation ambient temperature max. 40oC.

WEIGHT Mounting kit H2062: 1.5 kg Loudspeaker H2054: 5.5 kg Loudspeaker H2074: 4.0 kg HF SSB RE2100: 4.5 kg

4-0-25943,4-0-24732, 4-0-25944

PAGE 2-7

2 INSTALLATION RE2100

2.3 ELECTRICAL CONNECTION AND ASSEMBLING

HF SSB RE2100 is the control unit in SAILOR compact HF SSB programme 2000. RE2100 can therefor be the control unit in a 250W transmitter system or a 600/1200W system. For information how to interconnect this units with RE2100 please consult the technical manuals describing the units to be interconnected to

25816

J03-5 J03-2

Pin no. 1 Mute RX Black Pin no. 1 Telephone Red Pin no. 2 AF to AMP common Brown Pin no. 2 GND Yellow Pin no. 3 Pin no. 3 Signal GND White Pin no. 4 Pin no. 4 Mic Blue Pin no. 5 GND Shield Pin no. 5 Mic key Brown Pin no. 6 SP BUS interrupt Red Pin no. 6 Ext. SQ on/off Pin no. 7 Orange Pin no. 7 Distress Pin no. 8 Yellow Pin no. 8 Ser.+ Pin no. 9 AUX AF to TX common Green Pin no. 9 +18V Pin no. 10 -18V Blue Pin no. 11 +9V Violet Pin no. 12 +18V Grey Pin no. 13 Supply on/off White Pin no. 14 Mic key Brown/pink Pin no. 15 VF/AE-current Brown/yellow Pin no. 16 AF to AMP Brown/green Pin no. 17 0 dBm out common Brown/grey Pin no. 18 0 dBm out White/pink Pin no. 19 Ext. RF control White/yellow Pin no. 20 AUX AF to TX White/green Pin no. 21 RF on/off White/blue Pin no. 22 GND White/grey Pin no. 23 +9V Violet Pin no. 24 +18V Grey/orange Pin no. 25 -battery Red/blue

9324

PAGE 2-8

RE2100

CONTENTS

3 SERVICE

3.1 MAINTENANCE 3-1

3.2 ALIGNMENT INSTRUCTIONS 3-1

3.3 PROPOSAL FOR NECESSARY TEST EQUIPMENT 3-2

3.4 TROUBLE SHOOTING 3-7

3.5 PERFORMANCE CHECK 3-9

3.5.1 PERFORMANCE CHECK OF DISPLAY AND KEYBOARD 3-9

3.5.2 PERFORMANCE CHECK OF RECEIVER 3-11

3.5.3 PERFORMANCE CHECK OF EXCITER 3-18

3.6 MODULE PERFORMANCE CHECK 3-21

3.6.1 MODULE PERFORMANCE CHECK OF RECEIVER UNIT 3-22

3.6.2 MODULE PERFORMANCE CHECK OF FRONT END UNIT 3-32

3.6.3 MODULE PERFORMANCE CHECK OF SYNTHESIZER UNIT 3-37

3.6.4 MODULE PERFORMANCE CHECK OF EXCITER UNIT 3-40

3.6.5 PERFORMANCE CHECK OF MICROPROCESSOR MODULE 5 3-42

3.6.8 MODULE PERFORMANCE CHECK OF POWER UNIT 3-47

3.7 ADJUSTMENT PROCEDURE 3-47

3.7.1 ADJUSTMENT PROCEDURE FOR FRONT END AND RECEIVER UNIT 3-47

3.7.2 ADJUSTMENT PROCEDURE FOR SYNTHESIZER UNIT 3-50

3.7.3 ADJUSTMENT PROCEDURE FOR EXCITER UNIT 3-52

3.7.4 ADJUSTMENT PROCEDURE FOR POWER UNIT. 3-55

3.8 NECESSARY ADJUSTMENT AND CHECK AFTER REPAIR 3-56

3.9 FUNCTION CHECK 3-58

3.10 SELECTION AND DESCRIPTION OF THE SERVICE PROGRAMMES 3-60

3.10.1 HOW TO SELECT A SERVICE PROGRAMME 3-60

3.10.2 DESCRIPTION OF SERVICE PROGRAMMES 3-60

PAGE 3-1

RE2100

3 SERVICE

3.1 MAINTENANCE

PREVENTIVE MAINTENANCE

If the HF SSB RE2100 has been installed in a proper way the maintenance can, dependent on the environments and working hours, be reduced to a performance check at the service workshop at intervals, not exceeding 12 months. A complete performance check list is enclosed in this manual, chapter 3.5 PERFORMANCE CHECK.

Inspection of the antenna, cables, and plugs for mechanical defects, salt deposits, corrosion, and any foreign bodies shall be done at regular intervals not exceeding 12 months.

Along with each RE2100 a test sheet is delivered in which all the measurements, made in the test department of the factory, are listed. If the control measurings made in the service workshop should not show the same values as those listed in the test sheet, the set must be adjusted as specified in chapter

3.7 ADJUSTMENT PROCEDURE.

3.2 ALIGNMENT INSTRUCTIONS

INTRODUCTION

The measuring values indicated in chapter 5. CIRCUIT DESCRIPTION AND SCHEMATIC DIAGRAMS are typical values and as indicated it will be necessary to use instruments in absolute conformity with the below list:

3 SERVICE RE2100

PAGE 3-2

3.3 PROPOSAL FOR NECESSARY TEST EQUIPMENT

OSCILLOSCOPE:

Bandwidth DC-35 MHz Sensitivity 2mV/div Output Impedance 1 Mohm//20 pF E.g. Philips type PM3050

PASSIVE PROBE: Attenuator 20 dB Input Impedance 10 Mohm//15 pF Compensation Range 10-30 pF E.g. Philips type PM8936/091

MULTIMETER: Sensitivity DC (f.s.d.) 100 mV Input Impedance 10 Mohm Accuracy DC (f.s.d.) 1.5% E.g. Philips type PM2505

FREQUENCY COUNTER: Frequency Range 100 Hz - 120 MHz Resolution 1 Hz at f = 100 MHz Accuracy 1 . 10-7 Sensitivity 100 mV RMS Input Impedance 1 Mohm/30 pF E.g. Philips type PM6669/031

HF SIGNAL GENERATOR: Frequency Range 100 kHz - 100 MHz Output Voltage: 0dB/uV - 120 dB/uV Output Impedance 50 ohm Type of Modulation AM Modulation Frequency External E.g. Marconi type 2019

LF SIGNAL GENERATOR: Frequency Range 10 Hz - 10 kHz Output Voltage 20 mV

RMS

- 1V

RMS

Output Impedance 600 ohm Output Waveform sine wave E.g. Philips type PM5110

LF DISTORTION METER: Frequency Range f = 1000 Hz Distortion Range (f.s.d.) 1-10% Input Impedance 1 Mohm Accuracy (f.s.d.) 3% E.g. Philips type PM6309

3 SERVICE RE2100

PAGE 3-3

AA119

ceramic

1nF

1nF ceramic

To multimeter

Metal tube

Insulating material

10.00 12.00 70.00

ø10

25079

LAYOUT OF THE PROBE

TEST PROBE

50 OHM DUMMY LOAD

50 ohm -> 50 ohm: EMF-loss 20 dB

3 SERVICE RE2100

PAGE 3-4

POWER SUPPLY: Vout1 18V DC Vout2 18V DC Iout1 2 Amp DC Iout2 0.5 Amp DC E.g. 2 pcs. ELCANIC type 3010

TESTBOX

To test all the functions of the RE2100 is very difficult when no transmitter T2130 is available. For that reason S. P. Radio has developed and produced a testbox. When using this testbox it is possible in an easy way to test all the inputs and outputs of the RE2100.

The testbox has a built-in AF amplifier, which makes it possible to connect a loudspeaker directly to the testbox.

The testbox has a built-in unit to control the function of the SP-BUS output. By means of the built-in light emitting diodes and switches it is possible to control all the functions of the RE2100.

Specification of measuring instruments, which can be connected to the testbox is given in the beginning of this chapter, and to this list an 8 ohm loudspeaker can be added.

The below diagram shows the electric wiring inside the testbox:

COMPONENT LOCATION TESTBOX

5-0-26206 / 4-6-26206A

3 SERVICE RE2100

PAGE 3-5

DIAGRAM TESTBOX

3 SERVICE RE2100 The below diagram shows how to connect the testbox with the RE2100 and the external instruments.

4-0-26236A

If no testbox is available, it is possible to operate the RE2100 by connecting the power supply directly to the 25-pin connector, which is located at the back of the RE2100. In this 25 pin connector it is possible to find all the other inputs, outputs, and testpoints. The pin configuration for this connector is listed in chapter 2.3 ELECTRICAL CONNECTION AND ASSEMBLING. But it is only necessary to establish the following connections:

pin No. 10 -18V/0.2 Amp. pin No. 11 + 9V/0.5 Amp. pin No. 12 +18V/0.8 Amp. pin No. 5 GND

The handset is connected directly to the 9-pin connector at the back of the RE2100.

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3 SERVICE RE2100

3.4 TROUBLE SHOOTING

Trouble shooting should only be performed by persons with sufficient technical knowledge, who have the necessary measuring instruments at their disposal, and who have carefully studied the operation principles and structure of the SAILOR Compact HF SSB System.

SAILOR HF SSB RE2100 has a number of trimming cores and trimmers, which must not be touched, unless adjustments as specified in chapter 3.7 ADJUSTMENT PROCEDURE, can be made.

When measuring the units, short-circuits must be avoided as the transistors would then be spoiled.

LOCATING THE FAULTY UNIT

When a fault has been observed in the HF SSB system, it can be difficult to find out in which unit the fault can be located. The first thing to check, is whether the fault is somewhere in the aerial circuit, the handset or in the power source.

If the fault is not found there, check if an error message has been shown in the RX display of the RE2100. The error codes listed below are error messages, which are generated by the RE2100, and they therefore indicate a fault in this unit.

ERROR CODES

00 Internal power supply is low.

Check the power connections to the RE2100, or check the internal power regulators.

11 Illegal transmitting frequency.

The TX frequency, of which a tone sequence has been tried, is not legal.

12 Illegal transmitting mode.

The TX emission mode is not legal for transmitting.

15 Key sequence is not finished by the <ENT> key. 20 The communication link to the transmitter T2130 is interrupted.

Check the coax cable to the T2130 from RE2100.

21 The communication link between RE2100 and control unit C2140 or DSC/telex RM2150/

RM2151 has been stopped. Check the SP-BUS coax cable to the external equipment. If the “Error 21” flashes up again after the button <STOP/ENT> has been pressed, then check the SP-BUS interrupt line (J03-5 pin 6). This line has to be normal “High” (approx. +5V).

22 The communication link between the RE2100 and the Duplex/Telegraphy Reveiver R2120T

has been stopped. Check the SP-BUS coax cable between these units.

The error codes listed below are error messages, which are generated by the HF transmitter T2130, and they therefore indicate a possible fault in this unit.

PAGE 3-7

3 SERVICE RE2100 These error codes are described more detailed in the instruction manual for T2130, chapter

2.3 SYSTEM DESCRIPTION AND TROUBLE SHOOTING, and in the chapter 3.4 TROUBLE SHOOTING.

ERROR CODES

70 Motor circuit error AT2110.

See instruction manual for T2130, chapter 3.4.

71 Internal signal error.

See instruction manual for T2130, chapter 3.4.

72 Internal signal error.

See instruction manual for T2130, chapter 3.4.

73 High standing wave ratio (SWR) in the tuning of the AT2110.

Check the aerial and see instruction manual for T2130, chapter 3.4.

74 Transmitter temperature too high.

Let the transmitter T2130 have a pause and see instruction manual for T2130, chapter 3.4.

75 High standing wave ratio (SWR) when transmitting.

Check the aerial and see instruction manual for T2130, chapter 3.4.

76 Battery voltage low.

Check the condition of the batteries and the power cables. See instruction manual for T2130, chapter 3.4.

77 Temperature sensor error.

See instruction manual for T2130, chapter 3.4.

78 Internal high standing wave ratio (SWR).

See instruction manual for T2130, chapter 3.4.

If the error codes indicate that the fault may be found in the RE2100, the fault is probably no transmitter signal from the RE2100. The exciter can then, without any damage to the transmitter, be set on by activating the test programme SP-05-0.

The error codes do not indicate any receiver fault. A receiver fault can be in the aerial coupler AT2110, in the transmitter T2130, or in the receiver unit. To separate a fault in these units, disconnect the aerial cable at the back of RE2100 and connect a wire to the RE2100 coax socket. Try to find a broadcast station and check the receiver. If the fault is still present, it must be located in the RE2100 unit.

LOCATING THE FAULTY MODULE

If the fault has been located to the RE2100, the exciter can be activated in test programme SP-05-0. The receiver is always activated, when no test programme is activated. Check the connections to the modules in the RE2100. The power supply should be the first thing to control, the voltage is indicated in the diagram of each module. If the power supply is present, control the amplitude of the local oscillator signals. The next thing to control is whether the other inputs to the module are present. They are indicated in the diagrams of each module with reference to a special set-up of the RE2100. It should now be possible to locate the faulty module.

LOCATING THE FAULTY CIRCUIT

When the faulty module has been found, it can be difficult to find the faulty circuit or component. One way is to change the module. If this is not possible, the faulty component or circuit can be found in a more systematic way by using the chapter 3.6 MODULE PERFORMANCE CHECK.

Chapter 3.6 MODULE PERFORMANCE CHECK is divided into sections with a headline indicating a possibility of checking some main parameters, and this may be a great help.

PAGE 3-8

3 SERVICE RE2100

3.5 PERFORMANCE CHECK

GENERAL

A performance check is intended to be used as a check after repair and before reinstallation of the equipment. A performance check can be used to check the equipment after a certain time to make sure that the equipment is according to the required technical specifications.

The performance check is divided into three sections, and it is possible to perform one of the sections or all of them.

Connect the RE2100 with the testbox for the RE2100 and connect the power supply and the handset to the testbox as described in chapter 3.3 PROPOSAL FOR NECESSARY TEST EQUIPMENT.

If no testbox is available, it is possible to operate the RE2100 by connecting the power supply directly to the 25 pin connector, which is located at the back of the RE2100. The pin configuration for this connector is listed in chapter 2.3 ELECTRICAL CONNECTION AND ASSEMBLING. But it is only necessary to establish the following connections:

pin No. 10 -18V/0.2 Amp. pin No. 11 + 9V/0.5 Amp. pin No. 12 +18V/0.8 Amp. pin No. 5 GND

The handset is connected directly to the 9 pin connector at the back of the RE2100. This chapter includes a number of measurements where a signal generator is needed. The output level

of the generator is, in this manual, expressed in terms of the Electromotive Force (EMF), and it is measured in terms of the unit: dB/uV = 20 log(EMF/1uV), (dB above one microvolt).

The output level from signal generators in general is sometimes expressed in terms of the available power P

, which is measured in terms of the unit: dBm = 10 log(Pa/1mW), (dB above one milliwatt). For this

reason the conversion formulas between EMF and available power and vice versa are given here:

Pa (dBm) = EMF (dB/uV) - 113 dB EMF (dB/uV) = P

(dBm) + 113 dB

where P

is the available power and EMF is the Electromotive Force of the generator.

3.5.1 PERFORMANCE CHECK OF DISPLAY AND KEYBOARD

Connect the RE2100 with the testbox for RE2100. Connect the power supply +/-18V/2A, the loudspeaker, and a coax cable from the RE2100, SP-BUS output socket to the proper input terminals on the testbox.

The necessary test equipment to carry out a performance check is described in this manual chapter 3.3 PROPOSAL FOR NECESSARY TEST EQUIPMENT.

3.5.1.1 PERFORMANCE CHECK OF DISPLAY

1. Select test programme SP-00-2.

2. Control that the display is switched between all possible combinations of lighted bars.

3. Control that the mode indicating bars are toggled.

4. Control that the power reduction bars are alight.

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3 SERVICE RE2100

5. Press the keyboard ENT key.

6. Select test programme SP-00-3.

7. Control that the two led’s marked SP-BUS-TEST on the testbox are alight.

8. Press the keyboard TUNE button.

9. Turn the RF GAIN button fully counter clockwise.

10. Control that the bars in the signal meter are all alight.

11. Turn the RF gain fully clockwise.

3.5.1.2 PERFORMANCE CHECK OF KEYBOARD

1. Turn the VOL-OFF button fully counter clockwise and then fully clockwise.

2. Control that the testbox led marked SUPPLY ON/OFF can be switched on and off by the VOL-OFF button.

3. Press the keyboard buttons to key-in the receiver frequency 12345.6 kHz.

4. Press the keyboard button ENT.

5. Control that noise is heard from the loudspeaker.

6. Press the handset button TX.

7. Control that the point in the TX frequency window is toggled.

8. Press the keyboard buttons while the point is toggled to key-in the transmitter frequency 7890.0 kHz.

9. Press the keyboard button ENT.

10. Pres the keyboard button CH.

11. The display will now show ‘CH-----’.

12. Press the keyboard button SC.

13. The display will now show ‘SC X’.

14. Press the keyboard button RX.

15. The display will now show ‘12345.6 kHz’

‘7890.0 kHz’.

16. Control that the emission mode can be toggled by pressing the keyboard button MODE.

17. Control that the display light can be dimmed by pressing the keyboard button DIM.

18. Control that the led marked AGC can be toggled by pressing the keyboard button AGC.

19. Control that the led marked SQ can be toggled by pressing the keyboard button SQ.

20. Press the keyboard TUNE/CLARIF button.

21. Control that the RX frequency displayed changes to show the 10 Hz decimal ‘12345.60 kHz’.

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3 SERVICE RE2100

22. Press the keyboard FREQ error buttons to toggle the 10 Hz decimal up and down.

23. Press the keyboard TUNE/CLARIF button.

24. Press the keyboard FREQ error buttons to toggle the 100 Hz decimal up and down.

25. Press the keyboard 2182 button.

26. Control that the display shows ‘2182.0 kHz’ ‘2182.0 kHz’

27. Press the keyboard TEST ALARM button.

28. Control that the alarm tones can be heard in the handset earpiece.

29. Press the keyboard button ENT.

30. Press the keyboard buttons SEND ALARM and TEST ALARM.

31. Control that the display shows ‘Error 20’ ‘2182.0 kHz’

when these two buttons are pressed simultaneously.

3.5.2 PERFORMANCE CHECK OF RECEIVER

Connect the RE2100 with the testbox for RE2100 and connect the power supply and a loudspeaker to the proper inputs on the testbox. The necessary test equipment to carry out a performance check is described in this manual, chapter 3.3 PROPOSAL FOR NECESSARY TEST EQUIPMENT.

This chapter contains the following sections:

3.5.2.1. PERFORMANCE CHECK OF RECEIVER SENSITIVITY

3.5.2.2. PERFORMANCE CHECK OF RECEIVER DISTORTION

3.5.2.3. PERFORMANCE CHECK OF RECEIVER AUDIO PASSBAND

3.5.2.4. PERFORMANCE CHECK OF RECEIVER CLARIFIER AND FREQUENCY

3.5.2.5. PERFORMANCE CHECK OF RECEIVER AGC

3.5.2.6. PERFORMANCE CHECK OF RECEIVER SQUELCH

3.5.2.7. PERFORMANCE CHECK OF RECEIVER EXTERNAL CONNECTIONS

3.5.2.1 PERFORMANCE CHECK OF RECEIVER SENSITIVITY

1. Connect the signal generator to the aerial socket through the 50 ohm dummy load described in this

manual, chapter 3.3.

2. Connect a voltmeter or a distortion meter to the 0 dBm output on the testbox.

3. Choose receiver frequency f

, generator frequency fG, and generator output level VG according to

table in point 5.

4. Measure the signal to noise ratio SND/N with the distortion meter or the voltmeter as described in

point 6. The measured signal to noise ratio shall be better than 20 dB.

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3 SERVICE RE2100

6. Measurement of the signal to noise SND/N. With the specified test signal applied to the receiver, the measurement of SND/N is performed as described below.

SSB MODE

a. Turn the RF-GAIN control fully clockwise and make sure that the AGC is operative. b. Notice the output LF level by means of a voltmeter. c. Turn the AGC OFF and adjust the RF-GAIN control to achieve the output level found in point

6.b.

d. Change the signal generator frequency fG to fRX + 30 kHz and notice the reduction of the

LF output level, which expresses the signal to noise ratio.

AM MODE

e. Turn the RF-GAIN fully clockwise and make sure that the AGC is operative. f. Notice the output level by means of a voltmeter. g. Remove modulation from the generator signal and notice the reduction of the output, which

expresses the signal to noise ratio.

3.5.2.2 PERFORMANCE CHECK OF RECEIVER DISTORTION

To carry out the check as described below, it is necessary to have a distortion meter at your disposal. If this is not possible, the check can be done by an oscilloscope, but please note that it should not be possible to see a distortion of 10% or less on the oscillocope.

1. Connect a distortion meter to the 0 dBm output on the testbox.

2. Connect a signal generator to the aerial socket through a 50 ohm dummy load.

3. Choose receiver frequency f

generator frequency fG and generator output level VG according to

point 5.

PAGE 3-12

3 SERVICE RE2100

4. Measure the signal distortion SND/ND with the distortion meter. The measured distortion SND/ND shall be better than the figures given in the table in point 5.

3.5.2.3 PERFORMANCE CHECK OF RECEIVER AUDIO PASSBAND

1. Connect the signal generator to the aerial socket through a 50 ohm dummy load.

2. Connect a voltmeter to the 0 dBm output on the testbox.

3. Choose receiver frequency f

, generator frequency fG, generator output level VG according to point

4. USB-SSB MODE a. Set the f

, fG and VG according to point 1 in the table in point 7. b. Turn the RF-GAIN control fully clockwise and make sure that the AGC is operative. c. Notice the AF output level by means of the voltmeter. d. Turn the AGC off and adjust the RF-GAIN control to achieve the output level found in

point 4.c.

e. Change the signal generator frequency fG, and the generator output level VG according to

point 2 in table 7, and control the voltage on 0 dBm output to be above the value found in point 4.c.

f. Change f

according to point 3 in table 7 and control the voltage on 0 dBm output to be below

the value found in point 4.c.

5. LSB-SSB MODE Carry out point 4. USB-SSB MODE, but use the figures mentioned in point 7, under “lower sideband audio passband”.

6. AM MODE a. Set f

, fG and VG according to point 4 in table 7. b. Notice the AF output level by means of the voltmeter. c. Change the modulation frequency according to the figures in point 5 in table 7, and control

that the voltage on 0 dBm output has not dropped 6 dB below the value found in point 6.b.

d. Change the modulation frequency according to the figures in point 6 in table 7, and control

that the voltage on 0 dBm output has dropped more than 20 dB below the value found in point 6.b.

PAGE 3-13

3 SERVICE RE2100

3.5.2.4 PERFORMANCE CHECK OF RECEIVER CLARIFIER AND FREQUENCY

1. Connect the signal generator to the aerial socket through a 50 ohm dummy load.

2. Choose receiver frequency f

, signal generator frequency fG, and the generator output level V

according to point 6.

3. Connect a frequency counter to 0 dBm output on the testbox.

4. Activate the frequency tune and let the frequency f

change in 100 Hz steps and control with the

counter that this happens.

5. Activate the clarifier tune and let the frequency f

change in 10 Hz steps and control with the

counter that this happens.

7. With the frequency and clarifier tune, set the frequency fRX to 25000.07 kHz. PAGE 3-14

3 SERVICE RE2100

8. Control with the counter the output frequency to be 930 Hz +/-10 Hz.

NOTE!

The frequency tolerance of the signal generator shall be better than +/-2.5 Hz 0.1 ppm. If not and if the counter has a frequency tolerance of 0.1 ppm, carry out the measurement in section 3.5.3.2. Performance Check of Exciter Frequency.

3.5.2.5 PERFORMANCE CHECK OF RECEIVER AGC

1. Connect the signal generator to the aerial socket through a 50 ohm dummy load.

2. Connect a voltmeter to the 0 dBm output on the testbox.

3. Choose receiver frequency f

, generator frequency fG, and generator output level VG according to

the table in point 4.

5. Turn the RF-GAIN control fully clockwise, and make sure that the AGC is operative.

6. Notice the AF output level by means of the voltmeter at the 0 dBm output.

7. Increase the output level of the signal generator to 28 dB/uV.

8. The increase in AF output level measured with the voltmeter shall be less than 3 dB.

9. Notice the AF output level by means of the voltmeter at the 0 dBm output.

10. Turn the AGC OFF and adjust the RF-GAIN control to achieve the output level found in point 9.

11. Disconnect the signal generator from the aerial socket and notice the reduction of the AF output level, which shall be at least 35 dB.

12. Reconnect the signal generator to the aerial socket.

13. Turn the RF-GAIN control fully clockwise and make sure that the AGC is operative.

14. Notice the AF output level by means of the voltmeter at the 0 dBm output.

15. Increase the output level of the signal generator to 78 dB/uV.

16. The increase in AF output level measured with the voltmeter shall be less than 2 dB.

17. Connect 0 dBm output from the testbox to channel A on the oscilloscope.

18. Connect the SP-BUS output socket on RE2100 to channel B on the oscilloscope.

19. Select test programme SP-04-6.

20. Set the timebase on the oscilloscope to 20 msecs/div.

21. Set the oscilloscope to trig on channel B.

22. Control that the oscilloscope displays the response shown in figure SSB attack.

PAGE 3-15

3 SERVICE RE2100

SSB ATTACK

A = 0.5V/div 20 msecs/div B = 5V /div.

23. Set the timebase on the oscilloscope to 200 msecs/div.

24. Control that the oscilloscope displays the response shown in figure SSB decay. SSB DECAY

A = 0.5V/div. 200 msecs/div. B = 5V /div.

25. Select test programme SP-04-7.

26. Set the timebase on the oscilloscope to 50 msecs/div.

27. Set the signal generator in amplitude modulation mode, modulating LF signal 1.0 kHz and modulating index M = 0.3.

28. Control that the oscilloscope displays the response shown in figure AM attack and decay.

PAGE 3-16

3 SERVICE RE2100

AM ATTACK AND DECAY

A = 1.0V/div. 50 msecs/div. B = 5.0V/div.

3.5.2.6 PERFORMANCE CHECK OF RECEIVER SQUELCH

1. Connect a signal generator to the aerial socket through a 50 ohm dummy load.

2. Choose the receiver frequency f

, signal generator frequency fG, and the generator output level

according to table in point 8.

3. Make sure that the AGC and SQUELCH are active and adjust the AF volumen until a tone is heard in the loudspeaker.

4. Disconnect the signal generator from the aerial socket on the RE2100. You will now hear the receiver noise from the loudspeaker.

5. Control that the AF output is muted after about 10 secs.

6. Connect the signal generator to the aerial socket again.

7. Control that the squelch opens instantly and that you now hear a 1 kHz tone from the loudspeaker.

8. Control that the squelch closes after about 10 secs.

3.5.2.7 PERFORMANCE CHECK OF RECEIVER EXTERNAL CONNECTIONS

1. If no testbox for RE2100 is available, the connections can be found and checked in the 25 pin connector and the 9 pin connector at the back of the RE2100.

2. Press the front panel key <2182> fixed.

3. Control that the light emitting diodes names distress and +18 handset at the testbox are alight.

PAGE 3-17

3 SERVICE RE2100

4. Connect a signal generator to the aerial socket through a 50 ohm dummy load.

5. Choose receiver frequency f

, signal generator frequency fG and the generator output V

according to table in point 6.

7. A 1 kHz tone shall be heard from the loudspeaker and approx. seven bars in the signal strength meter are alight.

8. Activate the RX mute switch on the testbox.

9. No tone or noise shall now be heard from the loudspeaker and approx. 2 bars in the signal strength meter are alight.

10. Release the RX mute switch.

11. Activate the TEST ALARM button on RE2100 and control that the alarm tones can be heard in the handset earpiece

3.5.3 PERFORMANCE CHECK OF EXCITER

Connect the RE2100 with the testbox for RE2100. Connect a +/-18V/2A power supply, an LF signal generator, and the handset to the proper inputs on the testbox.

The necessary test equipment for executing the performance check is described in this manual, chapter

3.3. PROPOSAL FOR NECESSARY TEST EQUIPMENT.

This chapter consists of the following sections:

3.5.3.1. Performance Check of Exciter Output Signal

3.5.3.2. Performance Check of Exciter Frequencies and Classes of Emission

3.5.3.3. Performance Check of Exciter Microphone Amplifier and LF Response

3.5.3.4. Performance Check of Exciter Step Attenuator

3.5.3.1 PERFORMANCE CHECK OF EXCITER OUTPUT SIGNAL

1. Connect a 50 ohm resistor to the aerial socket. Two 100 ohm resistors in parallel soldered on a coax cable connected to the aerial socket are sufficient.

2. Connect an oscilloscope through a 10:1 probe to the 50 ohm resistor.

3. Connect the LF signal generator to the AF TO TX input on the testbox.

4. Select test programme SP-05-1 (fTX = 22.000 kHz).

5. Set the testbox switch RF ON/OFF on.

6. Adjust the LF signal generator to an output of 1Vpp (0.350V

RMS

) and a frequency of 1600 Hz.

7. Control that the HF output shown on the oscilloscope is 3.50 +/-0.50Vpp.

8. Readjust the oscilloscope gain until full deflection (8 div.) is seen on the screen.

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3 SERVICE RE2100

9. Select test programme SP-05-5 (fTX = 14.900 kHz).

10. Control that deflection now seen is approx. 8.0 +/-1.0 div.

11. Select test programme SP-05-4 (fTX = 28.000 kHz).

12. Control that deflection now seen is approx. 8.0 +/-1.0 div.

13. Select test programme SP-05-6 (fTX = 1.600 kHz).

14. Control that deflection now seen is approx. 8.0 +/-1.0 div.

15. Set the testbox switch RX ON/OFF off.

16. Select test programme SP-05-0 (fTX = 22.000 kHz).

17. Set the testbox switch MIC.KEY on.

18. Control that the HF output shown on the oscilloscope is 4.0 +/-0.5Vpp and that it is a two tone signal which is displayed.

19. Control that approx. 7 bars in the signal strength meter are alight.

20. Set the testbox switch MIC.KEY off.

21. Activate the handset key and control that the two tone signal is displayed on the oscilloscope screen.

22. Activate the keyboard button TUNE.

23. Activate the keyboard button TEST ALARM.

24. Control that the alarm tone can be heard in the handset earpiece.

3.5.3.2 PERFORMANCE CHECK OF EXCITER FREQUENCIES AND CLASSES

OF EMISSION

1. If only this section is performed, please start by carrying out the section 3.5.3.1. point 1, 2, and 3.

2. Select test programme SP-05-6 (fTX = 1.600 kHz).

3. Set the testbox switch RF ON/OFF on.

4. Adjust the LF signal generator to an output of 1Vpp (0.35V

RMS

) and a frequency of 1600 Hz.

5. Adjust the oscilloscope gain until full deflection (8 div.) is seen on the screen.

6. Toggle the MODE switch on RE2100 between J3E, R3E, H3E, and TELEX, and control that the deflection is approx. the same in all the classes of emission 8.0 +/-1.0 div.

7. Disconnect the LF signal generator.

8. Select the emission mode H3E on RE2100 and control that the deflection seen on the oscilloscope is 4.6 +/-0.5 div.

9. Select the emission mode R3E on RE2100 and control that the deflection seen on the oscilloscope is 1.2 +/-0.2 div.

10. Select test programme SP-05-4 (fTX = 28.000 MHz).

11. Select the emission mode H3E on RE2100.

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3 SERVICE RE2100

12. Connect a frequency counter through a 10:1 probe to the 50 ohm resistor at the HF output socket.

13. Control that the frequency is 28,000,000 +/-10 Hz. NOTE! The frequency tolerance of the counter shall be better than 0.1 ppm.

14. Set the testbox switch RF 50% DUTY CYCLE on.

15. Connect the oscilloscope through a 10:1 probe to the 50 ohm resistor at the HF output socket, and disconnect the frequency counter.

16. The HF signal seen on the oscilloscope screen is switched on for 250 msecs and then off for 250 msecs.

17. Control that the attack time of the HF signal is not more than 2 msecs, and that the decay time is not more than 3 msecs.

18. Set the testbox switch RF 50% DUTY CYCLE off and the testbox switch RF ON/OFF off.

If TELEX MODE is possible carry out the following points, if not go to the next section 3.5.3.3.

19. Connect the LF signal generator to the AF TO TX input on the testbox.

20. Adjust the LF signal generator output to 3Vpp/1600 Hz.

21. Select the emission mode TELEX on RE2100.

22. Set the testbox switch MIC.KEY on.

23. Control that the HF output shown on the oscilloscope is 4.0 +/-0.5Vpp.

3.5.3.3 PERFORMANCE CHECK OF EXCITER MICROPHONE AMPLIFIER AND

LF RESPONSE

1. If only this chapter is performed, please start by carrying out the section 3.5.3.1. point 1, 2, and 3.

2. Select test programme SP-05-6 (f

= 1.600 kHz).

3. Set the testbox MIC-KEY on.

4. Set the LF signal generator frequency to 1Vpp/1600 Hz.

5. Adjust the LF signal generator frequency until the deflection seen on the oscilloscope is max. approx. 1600 Hz.

6. Adjust the oscilloscope gain until full deflection (8 div.) is seen on the screen.

7. Adjust the LF signal generator frequency to 350 Hz and to 2700 Hz and control that the deflection seen on the oscilloscope screen is above 4.0 div.

8. Set the LF signal generator frequency to 1.0Vpp/1000 Hz.

9. Adjust the oscilloscope gain until full deflection (8 div.) is seen on the screen.

10. Adjust the LF signal generator output level until the HF output level seen on the osilloscope is approx. 7.5 div.

11. Control that the LF signal generator level at the input of the testbox is now 100 +/-50 mVpp.

PAGE 3-20

3 SERVICE RE2100

3.5.3.4 PERFORMANCE CHECK OF EXCITER STEP ATTENUATOR

1. If only this chapter is performed, please start by carrying out the section 3.5.3.1. point 1 and 2.

2. Select test programme SP-05-2.

3. Check that the stairs and staircase waveform seen on the oscilloscope screen has a continuous decreasing amplitude as shown below

4-0-26207

3.6 MODULE PERFORMANCE CHECK

GENERAL

A module performance check is intended to be used as an integral part of the trouble-shooting, because it gives the technician a chance to control the individual modules and parts of the circuit on each module.

The module performance check is divided into subsections, which correspond to the individual modules, and each of these subsections contains a number of check procedures.

The module performance check is carried out with all modules mounted in the HF SSB RE2100, and if a testbox is available, it should be used. The RE2100, the power supply, and the handset are all connected to the testbox as described in chapter 3.3. PROPOSAL FOR NECESSARY TEST EQUIPMENT.

If no testbox is available, it is possible to operate the RE2100 by connecting the power supply directly to the 25 pin connector, which is located at the back of the RE2100. The pin configuration for this connector is listed in chapter 2.3. ELECTRICAL CONNECTION AND ASSEMBLING. But it is only necessary to establish the following connections:

pin No. 10 -18V/0.2A pin No. 11 + 9V/0.5A pin No. 12 +18V/0.8A

pin No. 5 GND The handset is connected directly to the 9 pin connector at the back of the RE2100. This chapter includes a number of measurements where a signal generator is needed. The output level

of the generator is, in this manual, expressed in terms of the Electromotive Force (EMF), and it is measured in terms of the unit: dB/uV = 20 log(EMF/1uV), (dB above one microvolt).

PAGE 3-21

3 SERVICE RE2100 The output level from signal generators in general is sometimes expressed in terms of the available power

, which is measured in terms of the unit: dBm = 10 log(Pa/1mW), (dB above one milliwatt). For this

reason the conversion formulas between EMF and available power and vice versa are given here: Pa (dBm) = EMF (dB/uV) - 113 dB

EMF (dB/uV) = P

(dBm) + 113 dB

where P

is the available power and EMF is the Electromotive Force of the generator.

3.6.1 MODULE PERFORMANCE CHECK OF RECEIVER UNIT

This chapter contains the following sections:

3.6.1.1. Check of Sensitivity (RX-Module)

3.6.1.2. Check of LO2 and Reinjection Signals

3.6.1.3. Check of Crystal Filters (2nd IF)

3.6.1.4. Check of 2nd IF Amplifier

3.6.1.5. Check of AGC Circuit

3.6.1.6. Check of Detector

3.6.1.7. Check of AF Filters

3.6.1.8. Check of Earpiece Amplifier

3.6.1.9. Check of Squelch Circuit

3.6.1.1 CHECK OF SENSITIVITY (RX_MODULE)

The sensitivity of the receiver unit is mainly determined by the Second Mixer because of its relatively large power gain of about 8 dB. It is therefore most likely that a degradation of the sensitivity is caused by the mixer; but be aware that this is not the only possible failure. A degradation of the sensitivity could also be caused by a failure in the IF-amplifier, detector, audio frequency circuit, or simply by a missing local oscillator signal (LO2 or carrier reinjection).

To obtain a correct measurement of sensitivity, it is necessary to feed the generator signal through an impedance matching network as shown below.

4-0-26211

Impedance matching between generator and receiver module.

1. Connect the generator to receiver module through the impedance matching network shown above.

2. Connect the voltmeter to earpiece output at testpoint TR2-1 for measuring the AC-voltage.

3. Turn the RE2100 on.

4. Choose generator frequency f

and generator output level VG as specified in point 6. Select the

wanted Receiver Module (SSB/AM).

5. Measure the signal to noise ratio SND/N at the earpiece output and check that it is above 20 dB. (see section 3.5.2.1., point 6 for instructions about how to measure SND/N).

PAGE 3-22

3 SERVICE RE2100

3.6.1.2 CHECK OF LO2 AND REINJECTION SIGNALS

The LO2 signal is used in the mixing process from the 1st IF at 70.00064 MHz to the 2nd IF at 10.73152 MHz. The frequency of the LO2 signal is 59.26912 MHz when receiving a H3E signal or J3E-USB signal. In J3E-LSB mode the frequency of the LO2 signal is 80.73216 MHz.

The carrier reinjection signal is used in the detection of signals with a reduced carrier or signals without any carrier. The frequency of the carrier reinjection signal is 10.73152 MHz and is given by the TCXO.

1. Turn the RE2100 on and select J3E-USB mode.

2. To check the LO2 signal, connect the diode probe across the resistor R188-1, which is located at the output of the LO buffer at the Receiver Unit (module 1).

3. Check the measured DC voltage to be 3.3V +/-0.5V.

4. To check the reinjection signal connect a DC voltmeter through the diode probe to pin 8 at the detector IC (LM3189).

5. Check the measured DC voltage to be 300 mV +/-50 mV.

3.6.1.3 CHECK OF CRYSTAL FILTERS (2nd IF)

The selectivity of the second intermediate frequency is given by the crystal filters (SSB or AM filter), which form an important part of the overall receiver selectivity. If the 2nd IF selectivity cannot fulfil the specified requirements, it is probably caused by a mistuning of the two crystal filters or by a mistuning of the 1st IF filter at 70 MHz. The crystal filters are tuned by the trimming capacitor C18-1, which is located at the receiver unit. The adjustment procedure for this capacitor is described in section 3.7.1.3. The 1st IF filter is tuned by three trimming coils and two transformers. The adjustment procedure for these components is described in section 3.7.1.1. In this test of selectivity, the 6 dB bandwidth and the stop band attenuation is controlled. The test is performed by using variations in the level detector output voltage, which can be measured at testpoint TP1-1 in the AGC circuit. The voltage can be measured by using an analog multimeter, but it is easier to use a digital multimeter, because the variations in the level detector output voltage are relatively small (about 200 mV).

PAGE 3-23

3 SERVICE RE2100

SSB MODE

1. Connect the generator to the aerial socket at the front end unit (module 2).

2. Connect the voltmeter to testpoint TP1-1 for measuring the DC voltage at the level detector output.

3. Connect the counter to earpiece output at testpoint TP2-1.

4. Turn the RE2100 on.

5. Turn the RF gain control fully clockwise and make sure that the AGC is operative.

6. Choose generator frequency f

, generator output level VG and receiver frequency fRX according to

the table in point 20.

7. Make sure that J3E mode (SSB) is selected and that the AF signal frequency is approx. 1 kHz.

8. Wait 15 min. before proceeding, to temperature stabilize the receiver.

9. Turn off the AGC and adjust the manual RF GAIN Control to achieve a voltage of about 5 volt at testpoint TP1-1.

10. Finetune the receiver frequency by means of the arrow keys until maximum meter deflection, when measuring at testpoint TP1-1.

11. Readjust the manual RF GAIN to achieve a voltage of 5 volt at testpoint TP1-1.

12. To measure the 6 dB bandwidth, increase V

by 6 dB and notice that the measured voltage will

increase to about 14 Volt.

13. Increase the receiver by means of the upward arrow key until the voltage at testpoint TP1-1 is just about 5V.

14. Activate the clarifier function by pressing the <CLARIF> key and finetune the receiver frequency with the arrow keys until the voltage measured at testpoint TP1-1 is just above 5 volt. Now notice the receiver frequency in the display.

15. Deactivate the clarifier function by pressing the <CLARIF> key and decrease the receiver frequency by means of the downward arrow key until the measured voltage is just about 5 volt.

16. Key-in point 14.

17. Calculate the difference between the two frequencies found in points 14 and 16. This difference is equal to the 6 dB bandwidth, which must be above 2550 Hz.

18. To check the stopband attenuation, increase generator output level VG by 20 dB relative to VG in point 20.

19. Key-in the frequencies 1987.7 kHz and 1991.2 kHz and remember to turn off the AGC in each case. Control in both cases the DC voltage at testpoint TP1-1 to be below 5 volt.

20.

PAGE 3-24

3 SERVICE RE2100

AM MODE

21. Repeat points 1, 2 and 4-6.

22. Make sure that H3E mode (AM) is selected.

23. Repeat point 8-11.

24. Increase generator output level V

by 6 dB.

25. To check the 6 dB bandwidth, key-in the frequencies 986,7 kHz and 993.3 kHz, and control in each case the voltage at testpoint TP1-1 to be above 5 volt. Remember in each case to turn off the AGC.

26. Increase generator output level V

by 36 dB relative to VG in point 20.

25. To check the stopband attenuation, key-in the frequencies 982,9 kHz and 997,1 kHz, and control in each case the voltage at testpoint TP1-1 to be below 5 volt. Remember in each case to turn off the AGC.

3.6.1.4 CHECK OF 2nd IF AMPLIFIER

In this test the gain of the 2nd IF amplifier is controlled by checking the threshold level of the Automatic Gain Control. This threshold level is defined in the figure below, where the AGC-characteristic is sketched.

4-0-26210

AGC-characteristic used to define the sensitivity or threshold level of the AGC.

PAGE 3-25

3 SERVICE RE2100 Below the threshold level the input signal is too weak to be detected by the AGC circuit. The gain of the

2nd IF amplifier is then unregulated and the receiver output level will increase as 1:1 with increasing input level.

Above the threshold level the input signal is large enough to be detected by the AGC. The gain of the 2nd IF amplifier will then be regulated and the output from the receiver will idealistically be kept at a constant level. However, in practice the receiver output level will increase slightly with increasing input level, because a constant output level would require an infinite gain of the 2nd IF amplifier. The performance of the AGC above the threshold level is checked by measuring the “flatness” of the AGC characteristic. This measurement is also included in the check procedure given below, because it is measured in the same manner as the threshold level.

The threshold level must, as indicated in the AGC characteristic, be less than the sensitivity level of the receiver to ensure correct function of the AGC. The threshold level is determined by the level detector and the open loop gain from the aerial input to the level detector input. To study this in more details, the simplified block diagram is used in the following description.

4-0-26212

Simplified block diagram for the entire receiver.

PAGE 3-26

3 SERVICE RE2100 In the level detector, which is built-up around the transistor Q14-1, the base-emitter diode is used to

convert the received AC signal to a DC signal. Thus the input voltage to the level detector is almost a constant and is equal to the diode cut-in voltage. The open loop gain from the aerial input to the level detector input must then be sufficiently high to produce the required peak voltage of about 0.65V with an input signal at the receiver sensitivity level.

In the simplified block diagram, the amplification from the aerial input to the level detector input is divided into four blocks, which are:

1. Front End Unit

2. 2nd Mixer plus 2nd IF Filter

3. 2nd IF Amplifier

4. AGC Amplifier.

If the receiver does not pass the test of the threshold level given below, it is probably caused by a loss of gain in one of the four blocks.

The gain of the Front End Unit can be controlled directly by the test procedure given in the section 3.6.2.5., while the gain of the 2nd mixer and the 2nd IF filter can only be controlled indirectly by the sensitivity test of the RX module given in section 3.6.1.1.

The gain of the AGC amplifier can be controlled by measuring the detector output level, which must be almost constant from one module to another, because of the rectifying diode in the level detector. To control the detector output level, use the check procedure given in section 3.6.1.6.

If the Front End Unit, the 2nd mixer and 2nd IF filter, and the AGC amplifier all perform as expected, the 2nd IF amplifier must finally be examined. The problem may be solved by adjusting the reference voltage VREF in the AGC circuit. The adjustment is performed by the trimming resistor R203-1 and is described in section 3.7.1.4.

1. Connect the generator to the aerial socket at the front end unit (module 2).

2. Connect the voltmeter to testpoint TP2-1 for measuring the AC voltage at the earpiece output.

3. Turn the RE2100 on and turn the RF gain control fully clockwise.

4. Choose generator frequency fG, generator output level VG, and receiver frequency fRX according to point 9.

5. Measure the signal to noise ratio SND/N at the earpiece output (see section 3.5.2.1., point 6 for instructions about how to measure SND/N). If the signal to noise ratio SND/N is different from 20 dB, the generator output level must be adjusted until this value is obtained.

6. Notice the earpiece output at testpoint TP2-1.

7. To control the threshold level of the AGC, increase the generator output level V

by 20 dB and control that the earpiece output level does not increase by more than 2 dB relative to the level measured in point 6.

8. To control the flatness of the AGC, increase the generator output level V

by 50 dB so the total increase is 70 dB. Control that the earpiece output level does not increase by more than 3 dB relative to the level measured in point 6.

PAGE 3-27

3 SERVICE RE2100

3.6.1.5 CHECK OF AGC CIRCUIT

In this test the attack and decay time of the automatic gain control is controlled by measuring the step response of the AGC circuit. In J3E mode (SSB) the attack time is determined by the resistors R89-1, R91-1 and capacitor C72-1, while the decay time is determined by R63-1 and C69-1. In H3E mode (AM) the attack time and decay time are determined by R89-1, R91-1 and C71-1. The measurement of step response is performed by a sudden increment or decrement of the RF input level. This step in input level is obtained by toggling the RX mute relay, which is located at the front end unit. The relay is controlled by two different service programmes. The step response will be displayed on an oscilloscope, which with advantage may be a storagescope.

1. Connect the generator to aerial socket at the front end unit (module 2).

2. Connect the oscilloscope to testpoint TP3-1 for measuring the AGC voltage and select AC coupling.

3. Connect a probe from testpoint TP4-2 (collector of transistor Q01-2, located at front end unit) to the external trigger input on the oscilloscope.

4. Select external trig source, DC trig mode, and positive slope trig.

5. Turn the RE2100 on and turn the RF gain control fully clockwise.

6. Choose generator frequency and generator output level V

as specified in point 12.

7. In points 8-10 the AGC responses are measured with the oscilloscope and they must be similar to the responses shown below. NOTE! It may be necessary to adjust trig level to obtain an image on the oscilloscope.

8. To measure the attack time in J3E mode, select service programme SP-04-6.

9. To measure the decay time in J3E mode, select service programme SP-04-6 and change the setting of the oscilloscope. NOTE! To change service programme press <STOP>.

10. To measure the attack and decay time in H3E mode, select service programme SP-04-7 and change the setting of the oscilloscope. Select positive slope trig.

11. Press <TUNE> to leave service programme mode.

12.

PAGE 3-28

3 SERVICE RE2100 The RE2100 is automatically set by the service programmes.

AGC Step Responses.

3.6.1.6 CHECK OF DETECTOR

In this section the audio frequency output level and distortion from the detector are controlled. The output level from the detector is determined by the input level to the detector and by the detector itself. The input level to the detector is given by the base-to-emitter voltage of transistor Q14-1 divided by the voltage gain of the AGC amplifier, which is built-up around transistor Q16-1.

1. Connect the generator to the aerial socket at the front end unit (module 2).

2. Connect the voltmeter and a distortion meter to detector output at U06, pin 6.

3. Turn the RE2100 on, and turn the RF gain control fully clockwise.

4. Choose generator frequency f

, generator output level VG, and receiver frequency fRX according to

point 6.

5. Measure the AF output level and distortion at detector output and control the result by comparing it to the values given in point 6.

PAGE 3-29

3 SERVICE RE2100

3.6.1.7 CHECK OF AF FILTERS

The audio frequency selectivity is controlled by measuring the overall selectivity of the receiver. If the measured data cannot fulfil the specified requirements, it is necessary to control the 2nd IF selectivity before any conclusion can be made.

SSB MODE

1. Connect the generator to the aerial socket at the front end unit (module 2).

2. Connect the voltmeter and the counter to testpoint TP2-1 (earpiece output).

3. Turn the RE2100 on and turn the RF gain control fully clockwise.

4. Choose generator frequency f

, generator output level VG, and receiver frequency fRX according to

point 11.

5. Make sure that J3E mode (SSB) is selected, that AGC in on, and that the AF signal frequency is approx. 1 kHz.

6. Finetune the receiver frequency by means of the arrow keys until maximum meter deflection when measuring at testpoint TP2-1.

7. Notice the AC voltage at testpoint TP2-1.

8. Turn the AGC off and adjust the RF gain control to achieve the output level found in point 7.

9. To check the 6 dB bandwidth, choose the generator frequencies 1990.35 kHz and 1992,70 kHz and control in each case the AC voltage at testpoint TP2-1 not to decrease more than 6 dB relative to the value measured in point 7.

10.

To check the stopband attenuation, choose the generator frequency 1993,1 kHz and control the AC voltage at testpoint TP2-1 to decrease more than 20 dB relative to the value measured in point 7.

11.

AM MODE

12. Repeat point 1-4.

13. Make sure that H3E mode (AM) is selected, that AGC is on, and that the AF signal frequency is approx. 1 kHz.

14. Finetune the receiver frequency by means of the arrow keys until maximum meter deflection at testpoint TP2-1.

15. Notice the AC voltage at testpoint TP2-1.

16. To check the 6 dB bandwidth, change the modulation frequency of the generator to 100 Hz and 3000 Hz, and control in each case the AC voltage at testpoint TP2-1 not to decrease more than 6 dB relative to the value measured in point 15.

PAGE 3-30

3 SERVICE RE2100

17. To check the stopband attenuation, change the modulation frequency of the generator to 6 kHz and control the AC voltage at testpoint TP2-1 to decrease more than 40 dB relative to the value measured in point 15.

3.6.1.8 CHECK OF EARPIECE AMPLIFIER

The purpose of this test is to control the earpiece amplifier, which is built-up around the integrated circuit U07. If the earpiece output level is outside the specified range, it is necessary to re-adjust the trimming resistor R52-1, which is located at the receiver unit. If it is not possible to adjust the output level to be within the specified range, it is necessary to control the detector output level before any conclusion can be made.

1. Connect the generator to the aerial socket at the front end unit (module 2).

2. Connect the voltmeter and the distortion meter to earpiece output at testpoint TP2-1.

3. Turn the RE2100 on and turn the RF gain control fully clockwise.

4. Choose generator frequency f

, generator output level VG, and receiver frequency fRX according to

point 7.

5. Measure the earpiece output level at testpoint TP2-1 and control the result to be within the range

0.7V

RMS

- 0.9V

RMS

6. Measure the earpiece output distortion at testpoint TP2-1 and control the result to be less than

1.5%.

3.6.1.9 CHECK OF SQUELCH CIRCUIT

The squelch circuit in the RE2100 is voice activated and it works in principle by detecting deviations in the frequency of the received signal. This relative complex squelch function is implemented by means of four separate blocks, which are:

1. Limiting amplifier

2. Frequency to Voltage Converter

3. Voltage Change Detector

4. Hold Circuit

The output voltage from the Hold Circuit is sensed by the microprocessor and this unit is then controlling the analog switch, which is used to mute the audio frequency output.

In the check procedure given below only the analog part of the squelch is controlled and if this is performing as expected, a failure may be caused by the microprocessor or the connection cabling.

1. Connect the generator to the aerial socket at the front end unit.

2. Connect a handset or loudspeaker to the testbox or directly to the RE2100.

3. Turn the RE2100 on and turn the RF gain control fully clockwise.

4. Choose generator frequency f

; generator output level VG, and receiver frequency fRX as specified

in point 15.

PAGE 3-31

3 SERVICE RE2100

5. Switch off the squelch and make sure that you now hear a 1600 Hz tone.

6. To control the limiting amplifier connect the oscilloscope to the output of the operational amplifier U02/1, pin 1. Control the measured signal to be squarewave with a frequency of 1600 Hz and an amplitude of about 13Vpp.

7. To control the frequency to voltage converter, connect the voltmeter to the output of the operational amplifier U02/4, pin 14 and control the DC voltage to be about 7V.

8. Increase the generator frequency with 1 kHz and control the DC voltage at U02/4, pin 14, to increase to about 11V. Decrease the generator frequency with 2 kHz (f

= 1990.6 kHz) and control

the DC voltage to decrease to about 4V.

9. To control the voltage change detector, connect the oscilloscope to the output of the operational amplifier U01/4, pin 14. Select DC trig mode and positive slope trig.

10. Change the generator frequency with +/-1 kHz relative to the frequency specified in point 15 and control in each case the voltage change detector to generate an impulse with a magnitude of about 13V and a duration of about 350 msecs.

11. To control the Hold Circuit, choose the generator frequency specified in point 15, and switch on the squelch.

12. Connect the voltmeter to the output of the operational amplifier U01/1, pin 1.

13. Decrease the generator frequency with 1 kHz and control the DC voltage at U01/1, pin 1 to be about 13V. You will now hear a 600 Hz tone in your handset or loudspeaker.

14. Control the DC voltage at U01/1, pin 1 to fall to 0V after a time period of about 10 secs and control that the audio frequency output is muted.

15.

3.6.2 MODULE PERFORMANCE CHECK OF FRONT END UNIT

This chapter contains the following sections:

3.6.2.1. Check of Sensitivity (RE2100)

3.6.2.2. Check of Front End Gain

3.6.2.3. Check of Mute and RX/TX Switch

3.6.2.4. Check of Selection Circuit for Pre-Filters

3.6.2.5. Check of LO1 Signal and Buffer

PAGE 3-32

3 SERVICE RE2100

3.6.2.1 CHECK OF SENSITIVITY(RE2100)

The sensitivity of the entire receiver can in J3E mode be calculated from the following equation: SENS » 10 log (F

front

+fRX - 1 ) - 7 dB (dB/uV)

front

where the following figures shall be taken as typical values: F

front

= 5.2 » 7.2 dB : Noise factor and figure for Front End

= 6.3 » 8.0 dB : Noise factor and figure for Receiver

front

= 0.5 » -3.0 dB : Available power gain for Front End

The equation is only valid when using a single tone SSB test signal, which produces a signal to noise ratio of 20 dB at the receiver output, and when using a signal generator with an impedance of 50 ohm.

From the figures it can be seen that both the Front End Unit and the Receiver Unit are determining the sensitivity level.

To exclude the receiver unit, it is necessary to check the sensitivity level of this unit separately, which can be done by means of the check procedure described in section 3.6.1.1.

The available power gain, G

front

, of the Front End Unit can be controlled by the check procedure given in

the next section (3.6.2.2.). The check procedure in this section is especially useful to control the insertion loss of the six parallel

coupled bandpass filters, which are used as pre-filters in the Front End Unit. If the sensitivity is poor in only one band, it is very likely that the corresponding filter or the filter selection circuit has a failure.

The filter selection circuit can be checked by means of the check procedure given in section 3.6.2.3.

1. Connect the generator to the aerial socket through the 50 ohm impedance matching network shown in chapter 3.3. PROPOSAL FOR NECESSARY TEST EQUIPMENT.

2. Connect the voltmeter to the earpiece output at testpoint TP2-1 for measuring the AC voltage.

3. Turn the RE2100 on.

4. Choose generator frequency f

, generator output level VG, and Receiver frequency fRX as specified

in point 6.

5. Measure the signal to noise ratio SND/N at the earpiece output and check that it is above 20 dB. (See section 3.5.2.1., point 6 for instructions about how to measure SND/N)

PAGE 3-33

3 SERVICE RE2100 6

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NOTE! The signal levels given in point 6 are referring to the output of the 50 ohm impedance

matching network, which has an EMF insertion loss of 20 dB. To obtain the setting of the signal generator, the insertion loss of 20 dB must be added to the levels given in point 6.

PAGE 3-34

3 SERVICE RE2100

3.6.2.2 CHECK OF FRONT END GAIN

In this test the available power gain of the Front End Unit is controlled. The gain is determined by an indirect measurement and it is therefore necessary to correct the measured data afterwards.

In the test procedure given below, the input and output levels of the Front End Unit are measured by means of the diode probe. To avoid mistuning of the 70 MHz output filter, because of the capacitive loading introduced by the diode probe, it is necessary to measure the output level through a voltage divider. The Front End Unit must then be terminated as shown in the figures below, where the wanted loading impedance of 800 ohm is realized with a voltage divider consisting of a resistor of 750 ohm in series connection with a resistor of 50 ohm.

Termination of the Front End Unit for measurement of the available power gain. The termination is realized at the Receiver Unit (module 1).

The resistor R185-1 must be disconnected as shown above, before the termination of the Front End Unit can be implemented.

1. Terminate the Front End Unit as shown in the figures above.

2. Turn the RE2100 on.

3. Choose generator frequency f

, generator output level VG, and receiver frequency fRX as specified

in point 10.

4. Connect the diode probe across the 50 ohm resistor in the Front End terminating network (see figure above).

5. Notice the diode probe voltage.

PAGE 3-35

3 SERVICE RE2100

6. Connect the diode probe across the neon lamp at the input of the front end unit.

7. Adjust the signal generator level V

until the diode probe voltage is equal to the value measured

in point 5.

8. Calculate the difference between the signal generator level used in point 3 and the level found in point 7.

9. The available power gain of the front end unit can now be calculated by means of the equation

front

= 12 dB - DV

where DVG is the difference in generator level found in point 8. The gain should be -2 dB +/- 2 dB.

10.

3.6.2.3 CHECK OF MUTE AND RX/TX SWITCH

The mute relay RE01-2 is used for external mute functions and for protection of the Front End Unit, when the RE2100 is switched off. The mute function is checked by toggling the relay RE01, which is done by means of the service programme SP-04-6.

The RX/TX relay RE02-2 is used for switching between receiver and transmitter mode. The RX/TX relay is normally in the non-activated state, which corresponds to RX-mode. To obtain the TX-mode, the relay must be activated. This can only be done by means of a service programme, when the RE2100 is disconnceted from the transmitter T2130.

1. To check the mute relay, connect the signal generator to the aerial socket at the Front End Unit.

2. Choose the generator frequency f

= 1991 kHz and the generator level, VG = 70 dB/uV.

3. Select the service programme SP-04-6 and control the number of lighted LED’s in the signal strength meter to change between about five and eight with a time interval of about 2 secs. NOTE! Make sure that the signal strength meter is correctly adjusted.

4. To check the RX/TX relay connect a handset to the RE2100 for keying the exciter. If a testbox is available, this can be used instead.

5. Connect the voltmeter through diode probe to the aerial socket at the front end unit.

6. Select the service programme SP-05-0 and key the exciter.

7. Control the DC-voltage measured through the diode probe at the aerial socket to be 6V +/-1V.

8. To leave service programme mode press <TUNE>.

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3 SERVICE RE2100

3.6.2.4 CHECK OF SELECTION CIRCUIT FOR PRE-FILTERS

The switching between the pre-filters is controlled from the microprocessor through the shift register J012 and six operational amplifiers which are included in the two IC’s U02-2 and U03-2.

1. Key-in the receiver frequencies and control the DC-voltage at the output of U02-2 and U03-2 to be in accordance with the table in point 2.

3.6.2.5 CHECK OF LO1 SIGNAL AND BUFFER

In this test the level of the L01 signal at the output of the buffer is controlled. The L01 signal is used in the mixing process from the receiver frequency f

to the 1st IF at 70,000,640

MHz. The frequency of the LO1 signal can be varied from 70 MHz to 100 MHz and is determined by the equation: f

LO1

= f

+ f

IF1

= fRX + 70,000,640 MHz

where f

is the receiver frequency.

1. Connect the voltmeter through the diode probe across the coil L41-2.

2. Turn the RE2100 on.

3. Key-in the receiver frequency 2182 kHz.

4. Control the measured DC voltage to be 7.5V +/-1V

3.6.3 MODULE PERFORMANCE CHECK OF SYNTHESIZER UNIT

This chapter contains the following sections:

3.6.3.1. Check of TCXO

3.6.3.2. Check of PLL1

3.6.3.3. Check of PLL2

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3 SERVICE RE2100

3.6.3.1 CHECK OF TCXO

The TCXO signal is used as reference frequency in both PLL1 and PLL2, and it is also used as carrier injection signal for both transmitter and receiver.

1. Turn the RE2100 on. NOTE! The RE2100 must be on for at least 15 minutes before the check is carried out.

2. Connect the counter to TP4-3 through passive probe.

3. Check the frequency on TP4-3 to be 10.731520 MHz +/-1 Hz.

3.6.3.2 CHECK OF PLL1

The PLL1 consists of four independent VCO’s, which together cover the whole frequency band from 70 MHz to 100 MHz.

1. Turn the RE2100 on.

2. Connect the voltmeter to TP1-3.

3. Connect the counter to TP3-3.

4. Key-in the RX frequency and check the DC-voltage on TP1-3 and the frequency on TP3-3 to be in accordance with table in point 5.

6. Key in the RX-frequency and check the DC-voltage on TP1-3 and the frequency on TP3-3 to be in accordance with point 7.

8. Select RX-frequency 2225.4 kHz and measure the frequency on TP3-3.

9. Select RX-frequency 2075.3 kHz and measure the frequency on TP3-3, then subtract it from the frequency measured in check point 8. The result must be 150.100 kHz +/-2 Hz.

10. Connect the voltmeter to TP3-3 through diode probe.

11. Select RX-frequency and check the voltage on TP3-3 to be in accordance with point 12.

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3 SERVICE RE2100

12.

13. Connect the voltmeter to TP2-3 through diode probe.

14. Select service programme SP-04-5 as described in this manual, section 3.10.1. and check the voltage on TP2-3 to be above 0.8 Volt.

3.6.3.3 CHECK OF PLL2

The PLL2 consists of two independent VCO’s and is capable of delivering two different signals with the frequencies 59.26912 MHz and 80.73216 MHz.

1. Turn the RE2100 on.

2. Connect the voltmeter to TP5-3.

3. Connect the counter to TP7-3.

4. Select receiver mode and check the DC-voltage on TP5-3 and the frequency on TP7-3 to be in accordance with point 5

6. Connect the voltmeter to TP7-3 through diode probe.

7. Check the voltage on TP7-3 to be in accordance with table 8.

9. Connect the voltmeter to TP6-3 through diode probe.

10. Select service programme SP-04-5 as described in this manual, section 3.10.1., and check the voltage on TP6-3 to be above 0.8 Volt.

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3 SERVICE RE2100

3.6.4 MODULE PERFORMANCE CHECK OF EXCITER UNIT

This chapter contains the following sections:

3.6.4.1. Check of Compressor and AF Limiter

3.6.4.2. Check of Carrier Limiter Amplifier

3.6.4.3. Check of Modulator

3.6.4.4. Check of SSB Filter

3.6.4.5. Check of RF Limiter and Carrier Insertion

3.6.4.6. Check of Step Attenuator

3.6.4.7. Check of 70 MHz IF and LO Injection

Any value, which differs too much from the values given in this chapter should lead to an adjustment of the circuit in question. Please, see chapter 3.7.3. ADJUSTMENT PROCEDURE FOR EXCITER UNIT How to select service programmes is described in the chapter 3.10.

3.6.4.1 CHECK OF COMPRESSOR AND AF LIMITER

1. Connect a tone generator (1000 Hz) to the testbox at the BNC-socket “AF to TX”. If a testbox is not available, connect the tone generator directly to the handset plug on the RE2100 (to J03-2, pin

4). Connect it with a capacitor 22 uF/25V because of the DC voltage on the microphone terminal

2. Connect a scope probe to Q04-4 emitter (TP1-4).

3. Select service programme SP-05-1 and select J3E mode.

4. Adjust the tone generator output voltage from a minimum until the level at the scope is just constant. This limitation must happen at approx. 0.1Vpp measured at the handset plug J03-2, pin 4.

5. Check that the voltage at Q04-4 (TP1-4) stays approx. at the same level when increasing the tone generator 20 dB to 1Vpp.

6. Select service programme SP-05-0.

7. Connect scope probe to R07-4 and read approx. 0.5 Vpp (tune tones).

8. Connect scope probe to Q04-4 emitter (TP1-4).

9. Connect R34-4 (TP7-4) to ground (chassis). That is a short-circuit of R34-4, which means that the signal exceeds the cutting level.

10. Adjust the scope to full deflection (8 div).

11. Disconnect the grounding of R34-3 and read the peak-peak deflection to 6.9 div. +/- 0.3 div.

3.6.4.2 CHECK OF CARRIER LIMITER AMPLIFIER

1. Select service programme SP-05-0 and press handset key.

2. Connect a scope probe to J01-4 and measure the carrier injection to approx. 0.1Vpp.

3. Connect scope probe to the connection between R93-4 and C75-4 (TP2-4) and read the voltage to 1,55Vpp +/-0.1V.

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3 SERVICE RE2100

3.6.4.3 CHECK OF MODULATOR

1. Select service programme SP-05-0 and press handset key.

2. Connect a scope probe to U06-4, pin 10 and read approx. 0.17Vpp.

3. Connect scope probe to U06-4, pin 1 and read approx. 0.75 Vpp.

4. Connect scope probe to the connection between C66-4 and C67-4 (TP3-4) and read the voltage to 6.6 Vpp +/-0.3V.

3.6.4.4 CHECK OF SSB FILTER

1. Connect a tone generator to the testbox at the BNC-socket “AF to TX”. If a testbox is not available, connect the tone generator directly to the handset plug on the RE2100 (to J03-2, pin 4). Connect it with a capacitor 22 uF/25V because of the DC voltage on the microphone terminal. Set the tone generator output level to 0.3 Vpp.

2. Select service programme SP-05-1 and select J3E mode on the keyboard.

3. Press handset key.

4. Connect a scope probe to Q19-4 emitter (TP4-4).

5. Control of SSB filter response is carried out by changing the frequency of the tone generator and controlling the reading on the scope. Max. permissible ripple is 2 dB in the frequency range 500 Hz to 2500 Hz and the -6 dB frequency is approx. 350 Hz and 2700 Hz.

3.6.4.5 CHECK OF RF LIMITER AND CARRIER INSERTION

1. Select service programme SP-05-0 and press handset key.

2. Connect the scope probe to Q19-4 emitter (TR4-4) and read the voltage to approx. 1.5Vpp.

3. Short-circuit R34-4 (TP7-4) to ground, and the signal seen on the scope is now cut.

4. Adjust the scope until full deflection (8 div) of the cut signal is seen on the scope screen.

5. Disconnect the grounding of R34-4 and read on the scope the peak-peak voltage to be

7.2 div. +/-0.2 div.

6. Adjust the scope until full deflection of the signal is seen on the scope screen.

7. Select service programme SP-05-1 and press handset key.

8. Select H3E mode on the keyboard.

9. Check on the scope that the signal is 4.4 div. +/-0.3 div.

10. Select R3E mode on the keyboard.

11. Check on the scope that the signal is 1.2 div. +/-0.2 div.

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3 SERVICE RE2100

3.6.4.6 CHECK OF STEP ATTENUATOR

1. Select service programme SP-05-0 and press handset key.

2. Connect a scope probe to R169-4 (TP5-4) and read the signal to 0.55Vpp +/-0.05V.

3. In order to check the liniarity of the step attenuator, please see section 3.7.3.6. points 6-9.

3.6.4.7 CHECK OF 70 MHz IF AND LO INJECTION

1. Select service programme SP-05-3 and H3E mode.

2. Press handset key.

3. Place a diode probe on top of Q17-4 and read approx. 0.95V.

4. Select service programme SP-05-1 and H3E mode and press handset key.

5. Place the diode probe on top of Q17-4 and read approx. 1.25V.

6. Select service programme SP-05-0 and press handset key.

7. Place a diode probe on J02-4 and read approx. 1.4V.

8. Place the diode probe on top of Q17-4 and read approx. 1.75V.

9. Place the diode probe on J04-4 and read 1.8V.

10. Place the diode probe on top of Q24-4 and read approx. 13.5V

3.6.5 PERFORMANCE CHECK OF MICROPROCESSOR MODULE 5.

GENERAL

To execute a performance check of a microprocessor unit, keyboard unit and display unit (module 5, 6 and 7) it is necessary to dismantle the cover and remote the 2 PCB covers on module 5. Disconnect the BNC and 25 poles D-connector to T2130. Connect an external +18V power supply at J03 pin 12 or pin 24, an external -18V power supply at J03 pin 10 and an adjustable +9V power supply at J03 pin 11 or pin

23.

CHECK OF ON BOARD POWER SUPPLY

Connect a voltmeter between ground and anode of D02.Control the voltage to:

> 7.0V. Normally 9.0V.

Connect a voltmeter between ground and U15 pin 2. Control the voltage:

4.75V < +5VA < 5.25V.

Connect a voltmeter between ground and U17 pin 3. Control the voltage:

4.50V < +5VB < 5.50V.

Connect a voltmeter between ground and U18 pin 3. Control the voltage:

-4.50V > -5VB > -5.50V.

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3 SERVICE RE2100

CHECK OF MICROPROCESSOR

Control of Strap in P02.

If the strap is connected between pin 1 and pin 2, the microprocessor will read the programme from internal ROM. This is only used if the microprocessor U07 is mask programmed. In that case the ROM U06 will not be mounted. If the strap is connected between pin 2 and pin 3, the microprocessor will read the programme from U06.

Control of Strap in P03.

If the strap is connected between pin 1 and pin 2, the microprocessor will run in service programme mode. The display will read out “SP- “. Look up the description of Service Programmes in chapter 3.10. If the strap is connected between pin 2 and pin 3, the microprocessor will run the normal programme.

Control of the Internal Clock Frequency.

Connect a frequency counter to U07 pin 64. The frequency must be 2000 kHz +/-16.0 kHz (X-tal/4).

CHECK OF EXTERNAL ROM

If the microprocessor is strapped to external ROM, control the strap in P01. If the strap is connected between pin 1 and pin 2, the device (ROM) in socket U06 must be a 256 Kbyte type (e.g 27C256). If the strap is connected between pin 2 and pin 3, the device (ROM) in socket U06 must be a 128 Kbyte type (e.g. 27C128).

CHECK OF POWER LOW CIRCUIT AND WATCH DOG CIRCUIT

Control of Power Low Circuit

Adjust the 9V external power supply to 9.0V. When the power is switched on, control that the display will read out “Error20” (there is no connection to T2130). Press the distress key (2182), and the display will now read out “_2182.0”. Turn the 9V power supply down slowly and control the power voltage. When the display reads out “Error00” (the 9V power supply is too low) the power supply must be approx. 7.0V.

Control of Watch Dog Circuit.

Adjust the 9V power supply to approx. 9.0V. Connect an oscilloscope to U15 pin 6 and control that the square wave seen has a 5.0V +/- 0.5V amplitude, that the duty cycle is 50%, and that the frequency is one of 3 possible:

1. 15 Hz. Standard after power is switched on.

2. 20 Hz. Standard for Test Alarm mode.

3. 50 Hz. Standard for Scan Run mode.

Connect a test wire between ground and U15 pin 6. Control that the microprocessor will start a reset cycle after every 1.6 s. (the display will flash an “Error20”. Disconnect the test wire again and control that the microprocessor will stop the reset cycle.

CHECK OF BAUD RATE GENERATOR

Connect a frequency counter to U02 pin 9. The frequency will be a 26th part of the internal clock frequency (normally 76.923 kHz +/- 600 Hz.), and the duty cycle is 50%.

CHECK OF TUNE/ALARM TONE GENERATOR

Press the digits 0 and 1 at same time. The equipment will now be in Quick Service mode and the display will show “SP- “.

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3 SERVICE RE2100

Control of Tune Tone

Connect an oscilloscope to emitter of Q01 and press the digits 0-2-0 and ENT. The display will show “SP-02-0”. Control that the wave form seen is approx. equal to the one shown below. Press STOP to stop the tone.

Control of Alarm Tone

Connect a frequency counter to emitter of Q01 and press the digits 0-2-2 and ENT. The display will show “SP-02-2”. Control the frequency to 1300 Hz +/- 1.5%. Press STOP to stop the tone. Then press the digits 0-2-3 and ENT. The display will show “SP-02-3”. Control the frequency to 2200 Hz +/- 1.5%. Press STOP to stop the tone. Press TUNE/CLARIF to exit the Quick Service mode.

CHECK OF DISTRESS DRIVER

Press “2182” (Distress), the RX- and TX-display will show “ 2182.0”. Connect a voltmeter to collector of Q03 and control the voltage to be 14.8V +/-1.5V. Key-in a new TX-frequency and control that the voltage will go down to approx. 0V.

CHECK OF METER AMPLIFIER

Connect a test wire between ground and J03 pin 15. Connect a voltmeter between ground and U12 pin

7. Control the voltage to 600 mV +/- 50mV. Connect the test wire between J03 pin 15 and U17 pin 3. Control the voltage on U12 pin 7 to 3.6V +/- 250mV.

CHECK OF SPI DATA BUS

Press “2182” (Distress), the RX- and TX-display will show “ 2182.0”. Then press CH-1-ADD and 2-ADD, the distress frequency is now programmed into channel 1 and 2. Then press SC-8-ENT. If the scanning is started, press STOP and delete the channels for scan programme No. 8 until the display shows “CHno”. Press 1-ADD-2-ADD-ENT, channel 1 and channel 2 are now programmed in scan programme No. 8, and the receiver will now scan channel 1 and channel 2 with the same frequency. If the scanner stops at the channel then disconnect the antenna plug.

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3 SERVICE RE2100

Check of SPI Data

Connect an oscilloscope channel A to U10 pin 4 and channel B to U10 pin 10. Set TB=50 uS. Control that the two wave forms are the same. The voltage is 5Vpp +/-0.5V.

Check of SPI Clock

Connect an oscilloscope channel A to U10 pin 2 and channel B to U10 pin 12. Set TB=50 uS. Control that the two wave forms are the same. The voltage is 5Vpp +/-0.5V. The clock period is 26 uS.

Check of Timing Between SPI Data and Clock

Connect an oscilloscope channel A to U10 pin 2 and channel B to U10 pin 4. Set TB=5 uS and control the data set-up time as shown below.

Check of SPI Address Select

Connect an oscilloscope channel A to U09 pin 2. Set TB=5uS and control the wave form as shown below. Control the same wave form on U09 pin 3,4,5,6,7,8 and 16.

PAGE 3-45

3 SERVICE RE2100 Connect an oscilloscope channel A to U09 pin 13.

Set TB=500uS and control the wave form as shown below. Control the same wave form on U09 pin 14 and 15.

CHECK OF SP-BUS TRANSMITTER/RECEIVER

Press the digits 0 and 1 at the same time. The equipment will now be in Quick Service mode and the display will show “SP- “.

Select the service programme SP-00-3 (ref. to chapter 3.10). If the SP-BUS does not work satisfactorily, an “E” will be displayed in the TX-display. Connect an oscilloscope to BNC connector J04 (SP-BUS output). Control that the wave form seen is approx. equal to the one shown below. The 8 data bit and parities bit will change every time the SP-BUS transmitter sends a new byte. Transmit speed is 4800 baud and the time between two bytes is approx. 14 mS.

CHECK OF EEPROM U05

In order to test the Electrical Erasable PROM, the service programme SP-10-0 has to be run. Press the digits 1 and 0 at same time. The equipment will now be in Quick Service mode and the display will show “SP- “. Then press the digit 1-0-0 and finish with ENT. The RX-display will read out “SP-10-0 and the TX-display will start to count from 0 to 512. If the counting stops with 512 and an “A” is shown, the EEPROM is ok. But if the counting is stopped between 0 and 512 and an “E” is shown, there must be a programming error.

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3 SERVICE RE2100

3.6.8 MODULE PERFORMANCE CHECK OF POWER UNIT

3.6.8.1 CHECK OF VOLTAGE REGULATORS

1. Connect a voltmeter to the outputs of the voltage regulators and check the voltages according to the following table:

U01: +15V +/-1V U02: -15V +/-1V U03: +15V +/-1V U04: -15V +/-1V U06: +5.3V +/-0.2V U07: +3.5V +/-0.3V

3.6.8.2 CHECK OF RF AMPLIFIER AND FILTER

1. Connect a 50 ohm resistor to the aerial socket J01-2. Two 100 ohm resistors in parallel soldered on a coax cable connected to the aerial socket are sufficient.

2. Connect an oscilloscope through a 10:1 probe to the 50 ohm resistor.

3. Connect a signal generator to P03-8 with an output power of -9 dBm.

4. Control of the lowpass filter response is carried out by changing the frequency of the signal generator and controlling the reading on the scope. Max. permissible ripple is 2 dB in the frequency range 1.6 MHz to 30 MHz.

5. Tune the signal generator to 22 MHz and read on the scope the voltage to 3.5 Vpp +/- 0.5V

3.7 ADJUSTMENT PROCEDURE

This chapter contains the adjustment procedure for all adjustable components in the RE2100.

3.7.1 ADJUSTMENT PROCEDURE FOR FRONT END AND RECEIVER UNIT

This chapter contains the following sections:

3.7.1.1. Adjustment of 70 MHz IF-Filter (Front End and Receiver)

3.7.1.2. Adjustment of 70 MHz Transformer (Receiver)

3.7.1.3. Adjustment of SSB/AM Filter (Receiver)

3.7.1.4. Adjustment of 2nd IF-Gain (Receiver)

3.7.1.5. Adjustment of Signal Meter (Receiver)

3.7.1.6. Adjustment of Earpiece Level (Receiver)

3.7.1.1 ADJUSTMENT OF 70 MHz IF-FILTER (Front End and Receiver)

The 70 MHz IF-filter is adjusted by tuning the three trimming coils L35-2, L36-2, L37-2, and the two transformers TR04-2, TR01-1. The components L35-2, L36-2, L37-2 and TR04-2 are all located at the front end unit (module 2), while TR01-1 is located at the receiver unit (module 1). The adjustment is performed by using the two service programmes SP-04-0 and SP-04-1. These programmes set-up the first local oscillator (LO1) as a test signal and therefore no external signal generator is necessary.

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3 SERVICE RE2100

1. Disconnect any input to the aerial socket.

2. Connect a voltmeter to test point TP1-1 for measuring the DC-output voltage from the AGC level detector.

3. Turn the RE2100 on.

4. Select service programme SP-04-0 as described in section 3.10.1. of this manual.

5. Tune the transformer TR01-1 (Receiver Module) and the trimming coil L37-2 (Front End Module) to maximum meter deflection.

6. Select service programme SP-04-1 (press <STOP> to terminate the first service programme).

7. Tune the transformer TR04-2 and the trimming coils L35-2 and L36-2 to maximum meter deflection.

8. Select service programme SP-04-0.

9. Turn off the AGC and adjust the manual RF GAIN until the DC-output voltage from the AGC level detector is about 5 volt.

10. Finetune all five components by repeating point 5-7. Remember to turn off the AGC in point 6 after selecting the service programme SP-04-1. NOTE! If the DC-output voltage from the AGC level detector is increased to a level above 9 Volt, it is necessary to readjust the manual RF-gain until the voltage level is about 5 Volt.

11. Press <TUNE> to leave the service programme mode.

3.7.1.2 ADJUSTMENT OF 70 MHz TRANSFORMER (Receiver)

The position number of the 70 MHz transformer is TR01-1 and it is located at the receiver unit (module

1). The adjustment is performed by tuning TR01-1 until the DC-output voltage from the AGC level detector

is maximum. The tuning is performed by using the service programme SP-04-0. This programme sets-up the first local oscillator (LO1) as a test signal and therefore no external signal generator is necessary.

1. Execute points 1-4 in section 3.7.1.1.

2. Tune the 70 MHz transformer TR01-1 to maximum meter deflection.

3. Turn off the AGC and adjust the manual RF GAIN until the DC-output voltage from the AGC level detector is about 5 Volt.

4. Finetune TR01-2.

5. Press <TUNE> to leave the service programme mode.

3.7.1.3 ADJUSTMENT OF SSB/AM-FILTER (Receiver)

The SSB/AM-filter is adjusted by tuning the trimming capacitor C18-1 until the DC-output voltage from the AGC level detector is maximum. The trimming capacitor C18-1 is located at the receiver unit (module 1). The adjustment is performed by using the service programme SP-04-2. This programme sets-up the first local oscillator (LO1) as a test signal and therefore no external signal generator is necessary.

1. Execute points 1-3 in section 3.7.1.1.

2. Select service programme SP-04-2.

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3 SERVICE RE2100

3. Adjust the manual RF-gain until the DC-output voltage from the AGC level detector is about 5V.

4. Tune the trimming capacitor C18-1 to maximum meter deflection.

5. Press <TUNE> to leave the service programme mode.

3.7.1.4 ADJUSTMENT OF 2nd IF-GAIN (Receiver)

To meet the gain variations from one transistor to another, the 2nd IF-amplifier has been constructed with a reserve of power gain. This implies that the 2nd IF-gain may be very large, which may cause unstable conditions because of unwanted feedback.

It is therefore necessary to adjust the unregulated gain of the 2nd IF-amplifier, which must be done in accordance with the procedure given below.

The 2nd IF-gain is adjusted by trimming the resistor R203-1, which is located at the receiver unit (module 1). The adjustment is performed by using a signal generator and an AC voltmeter.

1. Connect the signal generator to the aerial socket at the front end unit.

2. Connect the AC voltmeter to earpiece output at testpoint TP2-1.

3. Turn the RE2100 on. NOTE! The RE2100 must be on for at least five minutes before proceding.

4. Select the setting of the signal generator and the RE2100 according to point 5.

6. Measure the AC voltage at the earpiece output.

7. Change the generator output level to 0dB/uV.

8. Adjust the resistor R203-1 until the AC voltage at earpiece output is decreased by 4 dB relative to the level measured in point 6.

3.7.1.5 ADJUSTMENT OF SIGNAL METER (Receiver)

The signal meter is adjusted by trimming the resistor R76-1, which is located at the receiver unit (module1).

1. Disconnect any input to the aerial socket.

2. Turn the RE2100 on and make sure that J3E-mode (SSB) is selected and that the AGC is operative.

3. Adjust R76-1 until the first LED-bar in the display is just about to light.

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3 SERVICE RE2100

3.7.1.6 ADJUSTMENT OF EARPIECE LEVEL (Receiver)

The earpiece level is adjusted by trimming the resistor R52-1, which is located at the receiver unit (module1). The adjustment is performed by using the service programme SP-04-3. This programme sets-up the first local oscillator (LO1) as a test signal and therefore no external signal generator is necessary.

1. Disconnect any input to the aerial socket.

2. Connect a voltmeter to earpiece output at testpoint TP2-1 for measuring the AC-voltage.

3. Turn the RE2100 on.

4. Select service programme SP-04-3.

5. Adjust R52-1 until the earpiece level is 0.8 V

RMS

+/-0.1 V

RMS

6. Press <TUNE> to leave the service programme mode.

3.7.2 ADJUSTMENT PROCEDURE FOR SYNTHESIZER UNIT

This chapter contains the following sections:

3.7.2.1. Adjustment of TCXO

3.7.2.2. Adjustment of API Voltage in PLL1

3.7.2.3. Adjustment of the VCO Circuits in PLL1

3.7.2.4. Adjustment of the VCO Circuits in PLL2

3.7.2.1 ADJUSTMENT OF TCXO

The Temperature Compensated X-tal Oscillator (TCXO) delivers the reference frequency, which is common for both PLL1 and PLL2. The adjustment is performed by measuring the TCXO frequency at the output of the TCXO buffer at testpoint TP4-3 (collector of transistor Q26-3).

1. Turn the RE2100 on NOTE! The RE2100 must be on for at least 15 minutes before the adjustment is carried out.

2. Connect the counter to TP4-3 through passive probe.

3. Adjust the TCXO, until the frequency at TP4-3 is 10.731520 MHz +/-1 Hz.

3.7.2.2 ADJUSTMENT OF API VOLTAGE IN PLL1

The API voltage is adjusted by trimming the resistor R88-3, which is located at the Synthesizer Unit (module 3). The adjustment is performed by using the service programme SP-04-4. This programme sets up a special receiver mode, where the API sideband from the LO1 is passed through the SSB crystal filter and the 2nd IF-amplifier. The level of the API sideband can then be measured as a DC voltage at the level detector output at testpoint TP1-1.

1. Turn the RE2100 on.

2. Connect the DC voltmeter to TP1-1 located on the Receiver Unit (module 1).

3. Select service programme SP-04-4 as described in this manual, section 3.10.1.

4. Adjust potentiometer R88-3 for minimum meter deflection.

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3 SERVICE RE2100

3.7.2.3 ADJUSTMENT OF THE VCO CIRCUITS IN PLL1

The PLL1 consists of four independent Voltage Controlled Oscillators, which each covers about a quarter of the whole frequency band of 30 MHz. The VCO circuits are adjusted by four individual coils. The adjustment is performed at the upper frequency in each of the four VCO bands and the coils are adjusted until the output voltage from the active loop filter is -11.0 Volt.

1. Turn the RE2100 on.

2. Connect the voltmeter to TP1-3.

3. Key-in the RX-frequencies and adjust VCO coils according to table 4 until voltage on TP1-3 is -11.0 Volt.

5. Key-in the RX-frequencies according to table 6 and check the voltage on TP1-3 to be -3 Volt +/-

1.0 Volt. NOTE! No adjustments of VCO coils shall be made.

6. RX-frequency

100.0

7500.0

15000.0

22500.0

3.7.2.4 ADJUSTMENT OF THE VCO CIRCUITS IN PLL2

The PLL2 consists of two independent Voltage Controlled Oscillators, which are used in USB and LSB mode respectively. The VCO circuits are adjusted by two individual coils, which are adjusted until the output voltage from the active loop filter is -6.5 Volt.

1. Turn the RE2100 on.

2. Connect the voltmeter to TP5-3.

3. Select J3E mode and adjust TR08 until the voltage on TP5-3 is -6.5 Volt.

4. Select LSB mode and adjust TR07 until the voltage on TP5-3 is -6.5 Volt.

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3 SERVICE RE2100

3.7.3 ADJUSTMENT PROCEDURE FOR EXCITER UNIT

This chapter contains the following sections:

3.7.3.1. Adjustment of Compressor and AF Limiter

3.7.3.2. Adjustment of Carrier Limit Amplifier

3.7.3.3. Adjustment of Modulator

3.7.3.4. Adjustment of RF Limiter

3.7.3.5. Adjustment of Carrier Insertion

3.7.3.6. Adjustment of Step Attenuator

3.7.3.7. Adjustment of 70 MHz IF

For best stability, all coils and transformers are adjusted with the cores in the lower resonant position. For each circuit to be adjusted, it is a condition that all the previous circuits are adjusted to obtain the best possible adjustment. In the adjustment procedure for the Exciter Unit, four service programmes are used, SP-05-0, 1, 2, and

3. How to select the service programmes is described in section 3.10.1.

3.7.3.1 ADJUSTMENT OF COMPRESSOR AND AF LIMITER

The compression level is adjusted by R35-4 and the cutting symmetry is determined by R57-4.

1. Connect the scope probe to the emitter of Q04-4 (TP1-4).

2. Select service programme SP-05-0.

3. A combined square wave signal (tune tones) is seen on the scope.

4. Turn R35-4 clockwise until the signal reaches a limiting level.

5. Adjust R57-4 to obtain a symmetrical cutting of the signal. That is, when both top and bottom of the signal reach the limiting level simultaneously when the signal is increased by means of R35-4.

6. Turn R35-4 fully clockwise.

7. Adjust the scope until there is full deflection (8 div.) on the scope.

8. Adjust R35-4 until the deflection seen on the scope is 7 div. peak-peak. The signal is now under the limiting level.

9. If this adjustment is the only one executed after repair, please execute 3.7.3.4. Adjustment of RF Limiter.

3.7.3.2 ADJUSTMENT OF CARRIER LIMIT AMPLIFIER

1. Connect scope probe to the connection between R93-4 and C75-4 (TP2-4).

2. Select service programme SP-05-0.

3. Press handset key.

4. Adjust L05-4 to maximum signal.

5. Release handset key.

PAGE 3-52

3 SERVICE RE2100

3.7.3.3 ADJUSTMENT OF MODULATOR

1. Connect scope probe to the connection between C66-4 and C67-4 (TP3-4).

2. Select service programme SP-05-0.

3. Press handset key.

4. Adjust TR01-4 to maximum signal.

5. Release handset key.

6. Select service programme SP-05-1.

7. Select H3E on the keyboard.

8. Press handset key.

9. Adjust R190-4 to minimum signal (noise) on the scope.

10. Release handset key.

11. If this adjustment is the only one executed after repair, please execute 3.7.3.4. Adjustment of RF Limiter.

3.7.3.4 ADJUSTMENT OF RF LIMITER

1. Connect scope probe to emitter of Q19-4 (TP4-4).

2. Select service programme SP-05-0.

3. Press handset key.

4. Adjust LO7-4, LO8-4, and TR02-4 to maximum signal.

5. Turn R87-4 fully clockwise. The signal is cut.

6. Adjust scope until there is full deflection on the scope (8 div.).

7. Adjust R87-4 until the deflection seen on the scope is 7.2 div. The signal is not cut.

8. Release handset key.

3.7.3.5 ADJUSTMENT OF CARRIER INSERTION

1. Connect scope probe to emitter of Q19-4 (TP4-4).

2. Select service programme SP-05-0.

3. Press handset key.

4. Adjust scope until there is full deflection (8 div.) on the screen.

5. Release handset key and press <ENT> on the keyboard.

6. Select service programme SP-05-1.

7. Select H3E mode on the keyboard.

8. Press handset key.

PAGE 3-53

3 SERVICE RE2100

9. Adjust R92-4 until the deflection on the screen of the carrier signal is 4.4 div.

10. Release handset key.

3.7.3.6 ADJUSTMENT OF STEP ATTENUATOR

1. Connect scope probe to emitter of Q18-4 (TP5-4).

2. Select service programme SP-05-0.

3. Press handset key.

4. Adjust L09-4 to maximum signal.

5. Release handset key and press <ENT> on the keyboard.

6. Select service programme SP-05-2.

7. Connect another scope probe to R143-4 (TP6-4). This signal is used to trig the scope. The scope must be trigged by the negative transition.

8. On the scope is now seen a staircase waveform. When adjusting R159-4 it can be seen that one of the steps changes amplitude.

9. Adjust R159-4 until the step, which changes amplitude, is approximately equal to the neighbour steps.

10. Press <ENT> on the keyboard.

11. To adjust the RF output power level from the Exciter Unit to the Power Unit (8), it is a condition that both the 70 MHz IF filter and the Power Unit are correctly adjusted. If not, perform section 3.7.3.7. and 3.7.4.2.

12. Connect a 50 ohm resistor to the aerial socket. Two 100 ohm resistors in parallel soldered on a coax cable connected to the aerial socket are sufficient.

13. Connect an oscilloscope through a 10:1 probe to the 50 ohm resistor.

14. Select service programme SP-05-0.

15. Press handset key.

16. Adjust R120-4 until the signal on the scope is 3.5 Vpp. If a milliwattmeter is connected to the aerial socket J01-2 it should read 12 dBm in 50 ohm.

17. Release handset key.

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3 SERVICE RE2100

3.7.3.7 ADJUSTMENT OF 70 MHz IF

When using the two service programmes SP-05-1 and SP-05-3, the 70 MHz IF filter can be adjusted.

1. Connect scope probe to the output of the Power Unit at PO4-8 (TP1-8).

2. Select service programme SP-05-3.

3. Select H3E on keyboard and press handset key.

4. Adjust L10-6, L11-4 and L12-4 several times to obtain maximum signal on the scope.

5. Release handset key and press <ENT> on the keyboard.

6. Select service programme SP-05-1.

7. Select H3E mode on keyboard and press handset key.

8. Readjust only L10-4 to maximum signal.

9. Release handset key

3.7.4 ADJUSTMENT PROCEDURE FOR POWER UNIT.

This chapter contains the adjustments for the 5V regulator and the RF power output level to the transmitter.

3.7.4.1 ADJUSTMENT OF +5V

The +5V output voltage must have a value between 5.1V and 5.5V to ensure stability in the Synthesizer Unit. Normally the resistor R33-8 is removed at the factory. If the regulator U06-8 has been changed for repair then check the output voltage. Connect a voltmeter to R16-8 (TP2-8) and measure the output voltage with R33-8 removed, and one of the following three situations occur:

Measured Value Adjusted Value a: Vo < 5.15V => R32-8 removes => 5.10 < Vo < 5.30V

b: 5.15V < Vo < 5.40V => nothing => 5.15V < Vo < 5.40V c: Vo > 5.40V => R33-8 replaces => 5.25 < Vo < 5.45V

3.7.4.2 ADJUSTMENT OF RF OUTPUT LEVEL

1. Connect a 50 ohm resistor to the aerial socket JO1-2. Two 100 ohm resistors in parallel soldered on a coax cable connected to the aerial socket are sufficient.

2. Connect an oscilloscope through a 10:1 probe to the 50 ohm resistor.

3. Connect a signal generator to PO3-8. Tune the signal generator to deliver -9 dBm output power at 22 MHz.

5. Select service programme SP-05-0 to start-up the voltage regulators U01-8 and U02-8.

6. Adjust R30-8 until the output voltage seen on the scope is 3.25 Vpp.

7. If a milliwattmeter is connected to the aerial socket J01-2 it should read 14 dBm. RF gain at 22 MHz is 23 dB.

PAGE 3-55

3 SERVICE RE2100

3.8 NECESSARY ADJUSTMENT AND CHECK AFTER REPAIR

GENERAL

After repair of the RE2100 it may be necessary to do some adjustments and checks. The extent of these adjustments and checks can only be decided by the person, who has done the repair, and this manual section must only be looked upon as a guide. Any repair must, as mentioned previously, be followed by a function check after reinstallation of the RE2100.

RECEIVER UNIT (MODULE 1)

After a Change of the Module

Execute 3.7.1.5. Adjustment of Signal Meter, and 3.5.2. Performance Check of Receiver.

Repair in 2nd Mixer and the Corresponding Input Matching Circuit

Execute 3.7.1.2. Adjustment of 70 MHz Transformer, and 3.5.2.1. Performance Check of Receiver Sensitivity.

Repair in LO2 Buffer

Execute 3.6.1.2. Check of LO2 and Reinjection Signals, and 3.5.2.1. Performance Check of Receiver Sensitivity.

Repair in SSB/AM Crystal Filters and the Corresponding Input/Output Matching Network

Execute 3.7.1.3. Adjustment of SSB/AM Filter. Execute 3.6.1.3. Check of Crystal Filters, and 3.5.2.1. Performance Check of Receiver Sensitivity.

Repair in 2nd IF Amplifier and AGC Circuit

Execute 3.7.1.4. Adjustment of 2nd IF Gain, and 3.7.1.5. Adjustment of Signal Meter. Execute 3.5.2.5. Performance Check of Receiver AGC, and 3.5.2.1. Performance Check of Receiver Sensitivity.

Repair in Detector

Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.2. Performance Check of Receiver Distortion.

Repair in Audio Frequency Filter

Execute 3.5.2.3. Performance Check of Receiver Audio Passband, and 3.5.2.1. Performance Check of Receiver Distortion.

Repair in Earpiece Amplifier

Execute 3.7.1.6. Performance Check of Earpiece Level, and 3.5.2.2. Performance Check of Receiver Distortion.

Repair in Squelch Circuit

Execute 3.5.2.6. Performance Check of Receiver Squelch.

FRONT END UNIT (MODULE 2)

After a Change of the Module

Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.3. Performance Check of Receiver Audio Passband.

Repair in Input Protection Circuit and Pre-Filters

Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.2. Performance Check of Receiver Distortion.

Repair in 1st Mixer and 70 MHz IF Filter

Execute 3.7.1.1. Adjustment of 70 MHz IF Filter. Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.3. Performance Check of Receiver Audio Passband.

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3 SERVICE RE2100

Repair in LO1 Buffer

Execeute 3.5.2.1. Performance Check of Receiver Sensitivity.

SYNTHESIZER UNIT (MODULE 3)

After a Change of the Module

Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.4. Performance Check of Receiver Clarifier and Frequency. Execute 3.5.3.2. Performance Check of Exciter Frequencies and Classes of Emission.

Repair in the TCXO and Buffer

Execute 3.7.2.1. Adjustment of TCXO.

Repair in Phase Detector, Current Mirror and API Circuit (PLL1)

Execute 3.7.2.2. Adjustment of API Voltage in PLL1, and 3.7.2.3. Adjustment of the VCO Circuits in PLL1. Execute 3.5.2.1. Performance Check of Receiver Sensitivity, and 3.5.2.4. Performance Check of Receiver Clarifier and Frequency.

Repair in the PLL1

Execute 3.7.2.3. Adjustment of the VCO Circuit in PLL1. Execute 3.5.2.1. Performance Check of Receiver Sensitivity, 3.5.2.4. Performance Check of Receiver Clarifier and Frequency, and 3.5.3.2. Performance Check of Exciter Frequencies and Classes of Emission.

Repair in the PLL2

Execute 3.7.2.4. Adjustment of the VCO Circuits in PLL2. Execute 3.5.2.1. Performance Check of Receiver Sensitivity, 3.5.2.4. Performance Check of Receiver Clarifier and Frequency, and 3.5.3.2. Performance Check of Exciter Frequencies and Classes of Emission.

EXCITER UNIT (MODULE 4)

After a Change of the Module

Execeute 3.5.3. PERFORMANCE CHECK OF EXCITER.

Repair in AF Selector, Compressor, and AF Limiter

Execute 3.7.3.1. Adjustment of Compressor and AF Limiter. Execute 3.6.4.5. Check of RF Limiter and Carrier Insertion.

Repair in Carrier Limiter Amplifier

Execeute 3.7.3.2. Adjustment of Carrier Limiter Amplifier, and 3.7.3.4. Adjustment of RF Limiter, and

3.7.3.5. Adjustment of Carrier Insertion.

Repair in Modulator and Modulation Level Amplifier

Execute 3.7.3.3. Adjustment of Modulator, and 3.7.3.4. Adjustment of RF Limiter. Execute 3.6.4.5. Check of RF Limiter and Carrier Insertion.

Repair in RF Limiter, Carrier Insertion and SSB Filter

Execute 3.7.3.4. Adjustment of RF Limiter, and 3.7.3.5. Adjustment of Carrier Insertion.

Repair in Step Attenuator

Execute 3.7.3.6. Adjustment of Step Attenuator.

Repair in 70 MHz IF

Execeute 3.7.3.6. Adjustmnet of 70 MHz IF, and 3.7.3.6. Adjustment of Step Attenuator, section 3.7.3.6. points 12. - 17.

PAGE 3-57

3 SERVICE RE2100

PROCESSOR UNIT (MODULE 5)

After a Change or Repair of the Module

Execute 3.5.1.1. and 3.5.1.2. Performance Check of Display and Keyboard. Execute 3.5.2.4. Performance Check of Receiver Clarifier and Frequency, and 3.5.3.2. Performance Check of Exciter Frequencies and Classes of Emission.

KEYBOARD UNIT (MODULE 6)

After a Change or Repair of the Module

Execute 3.5.1.2. Performance Check of Keyboard.

DISPLAY UNIT (MODULE 7)

After a Change or Repair of the Module

Execeute 3.5.1.1. Performance Check of Display.

POWER UNIT (MODULE 8)

After a Change of the Module

Execute 3.5.3. PERFORMANCE CHECK OF EXCITER.

Repair of +5V Regulator

Execute 3.7.4.1. Adjustment of +5V.

Repair of the Other Voltage Regulators

Execute 3.6.8.1. Check of Voltage Regulators.

Repair in RF Amplifier and Filter

Execute 3.7.4.2. Adjustment of RF Output Level, and 3.6.8.2. Check of RF Amplifier and Filter

3.9 FUNCTION CHECK

The function check is a simple test to ensure that the RE2100 is working properly after installation. The function check must always be carried out after a repair of the RE2100.

Any repair of the RE2100 must be followed by a performance check, and after reinstallation a function check must be carried out in order to make sure that the fault has been repaired and that the RE2100 is working correctly together with the installed transmitter T2130 and aerial coupler AT2110.

1. Turn on the VOL-OFF switch and control that noise is heard in the loudspeaker and the display is alight.

2. Press the keyboard buttons 0 and 1 simultaneously.

3. Select the test programme SP-00-2.

4. Control that all the leds in the display are activated, the mode indicating light emitting diodes are toggled, and the three light emitting diodes, indicating the power level, are alight.

5. Press the RF-GAIN control fully counter clockwise and control that all the light emitting diodes in the signal meter are alight.

7. Key-in a known broadcast station in the frequency range 100 - 384 kHz.

8. Notice that the detected AF signal is heard from the loudspeaker and from the handset earpiece without distortion.

PAGE 3-58

3 SERVICE RE2100

9. Toggle the keyboard button MODE, until J3E mode is chosen.

10. Notice that no beat note is heard in the loudspeaker.

11. Press the keyboard FREQ arrow buttons to toggle the 100 Hz decimal up and down.

12. Control that the beat note heard in the loudspeaker changes with the 100 Hz steps.

13. Key-in a known broadcast station in the frequency range 385 - 1600 kHz.

14. Notice that the detected AF signal is heard from the loudspeaker without distortion.

15. Key-in a known coastal station frequency in the frequency range 1600 -3990 kHz.

16. When listening to the coastal station, activate the clarifier and control that it is working properly.

17. Key-in one ITU channel in each of the maritime bands from 4.0 - 25.0 MHz and control that the receiver is working properly.

18. Activate a scan programme or key-in a scan programme, and control that the scan function is working correctly.

19. Active the keyboard AGC and SQ button and control that the leds marked AGC and SQ can be toggled.

20. When activating the SQ function, control that the noise from the loudspeaker disappears.

21. Select the lowest transmitting frequency and press first TX, and then TUNE. When the tune lamp extinguishes, press the handset key and whistle into the microphone. While whisteling, release the handset key.

22. Press the keyboard buttons 0 and 1 simultaneously.

23. Select the test programme SP-20-0.

24. Press the keyboard button ENT.

25. The TX display will now show the battery voltage when transmitting. This voltage must be above 22V DC.

26. Select the test programme SP-22-2.

27. Press the keyboard button ENT.

28. The TX display shows the latest measured Vforward. This voltage must be above 9V DC.

29. Select the test programme SP-23-0.

30. Press the keyboard button ENT.

31. The TX display shows the SWR, which must be below 2.

32. Select the test programme SP-26-1.

33. Press the keyboard button ENT.

34. The TX display shows the drive setting, which must be above 12.

35. Press the keyboard button TUNE.

36. Check that it is possible to tune and to transmit in all maritime bands.

PAGE 3-59

3 SERVICE RE2100

PAGE 3-60

37. Press the keyboard button TX, and then the button DUMMY LOAD.

38. Activate the handset key.

39. When the tune lamp extinguishes, press the keyboard buttons SEND ALARM and TEST ALARM simultaneously.

40. The transmitter sends the alarm tone signal to the dummy load, which can be seen on the AEcurrent meter.

41. The alarm tones will be heard in the handset earpiece.

42. Press the keyboard button ENT.

43. The transmitter stops transmitting.

44. As a final test, make a call to a coast station.

3.10 SELECTION AND DESCRIPTION OF THE SERVICE PROGRAMMES

3.10.1 HOW TO SELECT A SERVICE PROGRAMME

In order to help the operator, and the service engineer during installation or repair, the RE2100 has some built-in service programmes.

The RE2100 has a service mode, which is activated by pressing the keyboard buttons 1 and 0 simultaneously. The display of the RE2100 will now show ‘SP-’.

The various service programmes can now be selected by keying-in a three digit number. The display of the RE2100 will then show ‘SP-XX-X’.

A new service programme may be chosen after the keyboard button ENT has been pressed once. The display shows ‘SP-’ again, and a new three digit number can be keyed-in.

In order to return to normal operation mode, press the keyboard button TUNE/CLARIF.

3.10.2 DESCRIPTION OF SERVICE PROGRAMMES

SP-00-X TEST OF PROCESSOR, KEYBOARD AND DISPLAY MODULE

When 00 has been keyed-in, the RX display shows ‘SP-00-’, and the programmes 0 to 3 and 8 may be selected.

SP-00-0 READ OUT OF SOFTWARE VERSION NUMBER

In the TX display a 4 digit number will be read out, possibly followed by a letter. The number indicates S. P. Radio’s internal software number and the letter indicates the software release. Ex. 1085E => C-number C1085 and rel. E.

SP-00-1 READS OUT WHICH ITU FREQUENCY TABLE IS USED

When P-91 is read out, an earlier ITU table is used. When A-91 is read out, the ITU table in force from 1st June 1991 is used. When keying-in the digit 0 or 1, the read out will be changed from A-91 to P-91 or P-91 to A-91 respectively.

SP-00-2 STARTS TEST OF THE DISPLAY

This test programme is used in the performance check, section 3.5.1.1. When pressing <ENT> during the test, the test procedure stops. When pressing <ENT> again, the programme steps forward. When pressing <0>, the programme continues again automatically.

3 SERVICE RE2100

PAGE 3-61

SP-00-3 TEST OF SP-BUS

This test programme is used in the performance check, section 3.5.1.1. The processor sends a byte to itself via the serial SCI communication port. Each time an error is received, the display reads-out an ‘E’. If there is no error, a bar ‘-’ runs through the TX display.

SP-00-8 TEST OF KEYBOARD

This test programme is used to test all the keyboard buttons. When the programme is selected, press the keyboard from the top of the right corner down to the left corner. E.g. 1,2,3,4,5,6,-FREQ

DOWN,...........0,.,ENT. When the buttons are pressed, the display reads-out the number of the button

(ref. chapter 5.6. KEYBORD UNIT). If the button does not work, the display reads-out the number of the button with a letter “E”, when the next button is pressed.

SP-04-X TEST OF FRONTEND, RECEIVER AND SYNTHESIZER MODULE

When 04 has been keyed in, the RX display shows ‘SP-04-’, and the programmes 0 to 7 may be selected.

SP-04-0 ADJUSTMENT OF 70 MHz RECEIVER FILTER

This test programme is used in the adjustment procedure, sections 3.7.1.1. and 3.7.1.2, where it sets up the synthesizer, frontend, and receiver module for adjustment of the 70 MHz intermediate filter.

SP-04-1 ADJUSTMENT OF 70 MHz RECEIVER FILTER

This test programme is used in the adjustment procedure, section 3.7.1.1., where it sets up the synthesizer, frontend, and receiver module for adjustment of the 70 MHz intermediate filter.

SP-04-2 ADJUSTMENT OF SSB/AM RECEIVER FILTER This test programme is used in the adjustment procedure, section 3.7.1.3., where it sets up the synthesizer, frontend, and receiver module for adjustment of the 10.7 MHz SSB/AM intermediate filter.

SP-04-3 ADJUSTMENT OF EARPIECE LEVEL

This test programme is used in the adjustment procedure, section 3.7.1.6., where it sets up the synthesizer, frontend, and receiver module for adjustment of the earpiece level.

SP-04-4 ADJUSTMENT OF API VOLTAGE

This test programme is used in the adjustment procedure, section 3.7.2.2., where it sets up the synthesizer, frontend, and receiver module for adjustment of the API sideband level.

SP-04-5 TEST OF LO1 AND LO2 SIGNALS TO EXCITER

This test programme is used in the module performance check, section 3.6.1.5., where it sets up the synthesizer, exciter, and frontend module, in order to control that the local oscillator signals are present at the exciter module.

SP-04-6 TEST OF ATTACK AND DECAY TIME FOR AGC IN SSB MODE

This test programme is used in the module performance check, section 3.6.1.5., and performance check, section 3.5.2.5., where it sets up the synthesizer, frontend, and receiver module, in order to control that the SSB AGC attack and decay times are inside the limits.

SP-04-7 TEST OF ATTACK AND DECAY TIME FOR AGC IN AM MODE

This test programme is used in the module performance check, section 3.6.1.5., and performance check, section 3.5.2.5., where it sets up the synthesizer, frontend, and receiver module, in order to control that the AM AGC attack and decay time are inside the limits.

SP-05-X TEST OF EXCITER AND POWER MODULE

When the RE2100 is not connected with a transmitter T2130, it is not possible to activate the exciter module. It is therefore necessary to activate a test programme to get the exciter to work. When 05 has been keyed-in, the RX display shows ‘SP-05-’, and the test programmes 0 to 6 may be selected.

SP-05-0 EXCITER ACTIVATED IN TUNE MODE

The exciter output frequency is set to fTX = 22000.0 kHz, the tune tones can be activated by the handset key, and the transmit mode is J3E. Exciter step attenuator is set to max. output power.

3 SERVICE RE2100

SP-05-1 EXCITER ACTIVATED IN TELEPHONY MODE

The exciter output frequency is set to fTX = 22000.0 kHz, LF signal generator can be connected to testbox terminal AF to Telex, and the handset key is valid. Mode shift is possible, but the modulation is turned off in H3E mode. Exciter step attenuator is set to max. output power.

SP-05-2 TEST OF EXCITER STEP ATTENUATOR

The exciter output frequency is set to fTX = 22000.0 kHz, and the step attenuator is incremented with 1 step every 700 uS, until step 63 is reached. Then the attenuator is reset to step 0. The test programme is used in the performance check, section 3.5.3.4., module performance check, section 3.6.4.6., and module adjustment, section 3.7.3.6.

SP-05-3 TEST OF EXCITER 70 MHz FILTER

This test programme is used in the module performance check, section 3.6.4.7., and in module adjustment, section 3.7.3.7., where it sets up the synthesizer and exciter to control the 70 MHz intermediate filter.

SP-05-4 EXCITER ACTIVATED IN TELEPHONY MODE

The exciter is activated as in test programme SP-05-1, but the exciter output frequency is changed to

28000.0 kHz.

SP-05-5 EXCITER ACTIVATED IN TELEPHONY MODE

The exciter is activated as in test programme SP-05-1, but the exciter output frequency is changed to

14900.0 kHz.

SP-05-6 EXCITER ACTIVATED IN TELEPHONY MODE

The exciter is activated as in test programme SP-05-1, but the exciter output frequency is changed to

1600.0 kHz and modulation is possible in H3E mode

PAGE 3-62

RE2100

CONTENTS

4 MECHANICAL DISASSEMBLING AND MODULE LOCATION

4.1 ADJUSTMENTS AND LOCATIONS 4-1

RE2100

4 MECHANICAL DISASSEMBLING AND MODULE LOCATION

4.1 ADJUSTMENTS AND LOCATIONS

RE2100 FOTO NR. 501004,

501005, 501007, 501016, 501017,

501036, 501046, 4-6-26046

PAGE 4-1

On / Off / VolRF Gain Display

Remove

To disassemble Front plate

Rear Chassis

Remove

To disassemble RE2100

Cable to Processor Unit Main Cable

Power Unit (Module 8)

Heat Zink for Power Unit (Module 8)

Remove

To disassemble Heat Zink

Rear Chassis Cabinet Frontplate

4 MECHANICAL DISASSEMBLING AND MODULE LOCATION RE2100

PAGE 4-2

RE2100 FOTO NR. 501013-501015

501035, 501038, 4-6-26046

Keyboard Foil Light Conductor Front Chassis

Keyboard Unit (Module 5)

Display (Module 7)

Front Chassis removed

Exciter Unit (Module 4)

Synthesizer Unit (Module 3)

To disassemble Front Chassis Remove 2 x screws

Left Side Chassis

Swing Chassis

Right Side Chassis

4 MECHANICAL DISASSEMBLING AND MODULE LOCATION RE2100

RE2100 FOTO NR. 501018,

501030-501032, 501034, 501037,

501040, 501343, 4-6-26046

PAGE 4-3

Synthesizer Unit (Module 3) Exciter Unit (Module 4) Receiver Unit (Module 1)

RF Shields

Processor Unit (Module 5)

Front End (Module 2)

RF Shields

RE2100

CONTENTS

5 CIRCUIT DESCRIPTION AND SCHEMATIC DIAGRAMS

5.1 RECEIVER UNIT (MODULE 1) PART NO. 625631 5-1

5.2 FRONT END UNIT (MODULE 2) PART NO. 625632 5-9

5.3 SYNTHESIZER UNIT (MODULE 3) PART NO. 625633 5-13

5.4 EXCITER UNIT (MODULE 4) PART NO. 625634 5-23

5.5 PROCESSOR UNIT (MODULE 5) PART NO. 625635 5-29

5.6 KEYBOARD UNIT (MODULE 6) PART NO. 625636 5-35

5.7 DISPLAY UNIT (MODULE 7) PART NO. 625637 5-37

5.8 POWER UNIT (MODULE 8) PART NO. 625638 5-41

5.9 INTERCONNECTION CABLE PLAN 5-45

Sailor RE2100 Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual