MICOM-500E-A | Motorola MICOM-500E G761AA / G762AA HF-SSB radio transceiver Owner's Manual

6886858J01

HF-SSB MICOM-500E Model G761AA / G762AA

Owne ’ Ma 6802952C60

HF-SSB

MICOM-500E

Owne s

HF-SSB Micom –500E

CONTENTS

Introduction................................................................................................................................................2

General Specifications ...............................................................................................................................2

Interconnection Wires and Cables .............................................................................................................3

HF-SSB Micom - 500E Components ........................................................................................................4

Micom 2E-Trunk ..................................................................................................................................4

500W HF Linear Amplifier Unit ...........................................................................................................4

DC Power Supply ..................................................................................................................................5

Junction Box ..........................................................................................................................................5

Performance Specifications .......................................................................................................................6

400W Transceiver Model Complements ...................................................................................................9

Trouble Shooting .......................................................................................................................................9

Radio Modifications ................................................................................................................................10

Radio Tuning Procedure ......................................................................................................................10

ALE..........................................................................................................................................................10

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HF-SSB Micom –500E

INTRODUCTION

The transceiver is a complete unit that includes Micom-2ET, 500watts amplifier , power supply, nc os oge her a 19” dr we The c of he r di i pl c he dr wer f ont panel. The unit includes a movable drawer, which allows to detach the control panel of the radio and moved up to 5 meters away (cable extension included).

The transmitter amplifier is microprocessor controlled, doing the following functions:

- Adjust amplifier input sensitivity

Monitor heat, VSWR, and under voltage conditions,

Setting the power output via the channel power setting (Max, High, Medium and Low)

GENERAL SPECIFICATION

Power Output:

Band Switching:

Input Voltage:

Cooling:

1.6-30MHz: 400W PEP and average

Fully Automatic

220 /110VAC

Cooling fans

T/R Switching time: 10mS nominal

Band Switch time: 15mS nominal

Protection: Input over drive under voltage (adjustable):

Factory default 10.0 VDC Amplifier module

Current imbalance VSWR faults Frequency out of

Specified range over current over temperature.

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HF-SSB Micom –500E

ףד םו צמ כ טו סו שי

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HF-SSB Micom –500E

HF-SSB MICOM-500E COMPONENTS

1.

MICOM 2E-Trunk

For Micom 2E-Trunk specification see user manual 6802952C60

2. 500W HF Linear Amplifier Unit

Input Voltage:

Power Output:

14 VDC

1.6-30MHZ: 500W PEP and average

The power amplifier is fully protected by microprocessor control. This circuitry dynamically monitors all amplifier parameters, and provides adjustments and protection against high VSWR, under voltage, over current and high temperature conditions.

Current- protection against over current condition (exceeding 100 amps) and current imbalance between amplifier modules (exceeding 20%). When one of these two conditions exists, the amplifier turns off-line. To reset the transceiver, power down the amplifier and restart the unit.

Volt - protection against under amplifier turns off-line. To reset the transceiver, power down the amplifier and restart the voltage condition (less than 10 VDC). When this condition exists, the unit.

VSWR –when a sampled VSWR exceeded 4:1 and the power reflected back to the amplifier is higher than acceptable, the amplifier turns off-line. To reset the transceiver, power down the amplifier and restart the unit.

Temp - protection against over temperature condition

Atten –as input RF power level increases beyond 60-70 watts, the attenuation increases automatically. The Attenuate remains engaged until the input drops to 30 watts.

ALC Control- provides adjustable ALC feedback voltage.

A positive voltage is present on the Amplifier line for use with the equipped transceiver for ALC input control.

PTT keying mode and Band input filter selection enabled automatically. Band switching time is typically 15 msec or less.

This automated capability is ideal for remote or unattended operating site application.

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HF-SSB Micom –500E

3.

DC Power Supply

Model: EWS1500-15

Nominal Output Voltage: 15V

Maximum Output Current: 100A

Maximum Output Power: 1500W

Input Voltage Range: 85~132 VAC / 170~265 VAC (Selectable), 47~63 Hz

110/220 VAC power supply - if need to convert the power supply from 220VAC to 110VAC, please detached the 110/220VAC panel at the rear panel of the unit and short the A and B terminals.

The ON/OFF switch on the front panel of the unit, enables to turn the power supply output on and off.

Note that, when the dc output power supply is on OFF mode, the internal power supply fans still work.

4.

Junction Box

The junction box enables the connection of up to four external devices simultaneously, in addition to

Potentiometers adjust - Potentiometers are used to adjust the received audio levels (one of each connector). Each potentiometer is associated with a connector as follows:

ACC. -J1: RX1

ACC. -J2: RX2

ACC. -J3: RX3

ACC. -J4: RX4

The potentiometers are located on the rear panel of the MICOM-500E.

For more details see Service Manual 68P02952C55

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HF-SSB Micom –500E

PERFORMANCE SPECIFICATIONS for 400W TRANSCEIVER

GENERAL

Frequency Range XMIT

Frequency Range RX

RF Input Impedance

Number of Channels

Scanning

1

Frequency Stability

Frequency Drift (Aging)

Synthesizer Lock Time

Frequency Resolution

Operating Temp. Range

Storage Temp. Range

Humidity

1.6 –30 MHz

0.1 –30 MHz (0.1 - 1.6 MHz reduced spec)

50 Ohms

200 SIMPLEX or HALF DUPLEX

5 groups with up to 100 channels per group, including 1 guard channel.

Programmable scan rate: 1 - 5 sec. per channel, in 1 sec. steps

0.6 PPM @ -10

to 60C

1 PPM/year

10 msec. Max

10 Hz

-10

to +60C

-30

to +70C

95% @ 50

C

Remote Control Interface

Modes of Operation

RS232C (Optional)

J3E SSB

R3E PILOT

H3E AME

J2A CW

J2B RTTY, ARQ, FEC, PACKET, MCW

B8C FAX, DATA, FSK

14VDC Operating Voltage

Dimensions

Height (mm/inch) 265/ 10.43

Width (mm/inch)

Depth (mm/inch)

422/ 16.61

508/20

CURRENT CONSUMPTION @ 14 VDC

XMIT Voice (500 W P.E.P.) 100 Amp

Receive Full Audio

Squelch

2 Amp

1.7 Amp

1

ALE specification see user manual 6802952C60

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HF-SSB Micom –500E

TRANSMITTER

Output Power

Reduced Power Levels

Audio Bandwidth

2

Audio Bandwidth Ripple

Intermodulation

Spurious Emissions

Carrier Suppression

400W P.E.P. and average +1dB to -2dB

400W, 350W, 300W, 200W (RSS programmable)

3 dB

-24 dB / 400W P.E.P

-60 dB / 400W P.E.P

-50dB / 400W P.E.P

Undesired Sideband

Suppression

Audio Distortion

-55dB / 400W P.E.P

2.5%

1/2 Power Mic. Sensitivity 15 to 125mV (RMS)/600 Ohms

Hum & Ripple

Inband Noise

TX/RX Switching Time

Tx Tuning Adjustments

3

-50 dB

-60 dB (30 Hz BW)

10 msec

None

RECEIVER

Sensitivity (SINAD) SSB 0.5

V for 10 dB SINAD (0.35 V Typical. Note 1)

0.1 - 1.6 MHz with reduced performance

1/2 Rated Power Sensitivity 1

V for 2.5W audio at speaker

Selectivity

2

- 6 dB @ 350 to 2700 Hz

–60 dB @ -1 kHz; +4 kHz

Image Rejection -80 dB

IF Rejection -85 dB

2

See Micom 2E spec. for more Bands widths.

3

For tune procedure wait about 2 sec when stepping from one channel to another before transmitting.

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HF-SSB Micom –500E

RECEIVER (continued)

Undesired Sideband Rejection -55 dB @ -1 kHz

Spurious -80 dB

Intermodulation

Crossmodulation

Desensitization

-80 dB

-100 dB @ 100 kHz

-100 dB @ 100 kHz

Reciprocal Mixing

Audio Power at Speaker

RGC Range

RGC Time Constants

Voice

-100 dB @ 100 kHz

5W @ 2.5% distortion

5

V to 1V (2 dB change in output level)

Attack time 10 msec

Release time 1500 msec

Data

Squelch

Clarifier Range

Attack time 10 msec

Release time 10 msec

Constant SINAD (digital)

200 Hz

Receiver Tuning Adjustments None

Maximum Antenna Input 20 kV transient, 100V RMS for 2 minutes

CONTROLS

Standard and optional: volume, on/off, scroll, squelch, scan, USB/LSB, call, monitor, priority, func and accessory/programming connector.

Specifications subject to change without notice.

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HF-SSB Micom –500E

400W TRANSCEIVER MODEL COMPLEMENTS

M81AMN0KV5AK Micom 2E-Trunk

FDN6125A

FPN5585A

Amplifier 500 watts

Power supply

FRN5865A

01MB000027

01MB000029

01MB000030

FMN1615A

Junction box

Cables

Chassis

Miscellaneous

Microphone

TROUBLE SHOOTING

In case of malfunctioning, perform the following steps (refer to the Maintenance

1. Turn OFF and ON the radio switch to reset both the radio and the amplifier.

2. Use BITE (Only Low RF test)

3. Refer to the User Troubleshooting Chart.

4. Follow the troubleshooting procedures in this section, which provide instructions for isolating faulty boards.

Troubleshooting a board at component level should be performed according to the notes on the relevant schematic diagram.

FAULT

CURR trip off-line

VOLT trip off-line

VSWR trip off-line

Amp TEMP led is on.

No PTT Keying

ADVICE

Ensure power supply maintains voltage greater than 11.0VDC

under load. Check DC cable connections.

Check integrity of antenna and feedline connections.

Check for evidence of arc-over or dielectric breakdown of feedline. Ensure antenna is resonant (<2:1 SWR) at the desired operating frequency.

Reduce drive level or duty-cycle. Ensure fan unit is operating properly.

Ensure transceiver, amplifier and DC supply all utilized a common ground.

9

HF-SSB Micom –500E

RADIO MODIFICATION

Modifications that had been taken in the radio, in order to integrate it with the

400W amplifier.

1. Omit R325 and R326 from the High-power board.

2. Add 150Ωin parallel to R274.

3. Add diode in the ALC section.

3. Omit L1FL22 from the LORD board.

4. Add 10KΩin parallel to C7018.

5. Jumper between R1FL22 and L1FL22 junction to the radio ALC circuit.

RADIO TUNING PROCEDURE

Before operating the 400W transceiver, a calibration procedure should been taken.

An IBM PC and RSS (Radio Service Software) package, FLN2514, are required to align the radio.(factory setting) ea ma k c of he Ampl i ”.

2. There are 4 steps of power outputs as noted above. If you need to perform a power calibration, please refer to the power calibration procedure in the MICOM-2E

RSS manual.

es ” be t e us “Ful t t he “ es .

he opt ec pl a ma k chec of he da a ” in order to reduce the sounding and data communication power output to 200W.

ALE

Automatic Link Establishment (ALE) is an embedded feature inside the Micom-2E/R

ALE family of mobile/fixed station HF-SSB radios.

Through the combined use of channel scanning, selective calling and Link Quality

Analysis, ALE automatically selects the best available communications link. It is no longer necessary for an operator to be familiar with the varying factors, which affect high frequency (HF) propagation between two points.

Each ALE equipped Micom-2 ALE family radio stores a matrix of Link Quality Analysis

(LQA) scores for all other stations in the HF network. Memorized LQA scores are derived from an analysis of channel "soundings" which are periodically transmitted by each network station. When an operator selects the individual or net call address of the receiving station, ALE automatically determines the optimum available channel and automatically initiates calling procedures. Sending and receiving operators are alerted when a communication link has been established.

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