SAC SS-800AVS Bedienungsanleitung

SOUTHERN A VIQNlC.,q COM.~A NY

MANUFACTURERS OF LOW FREOUENCY RADIOBEACONS AND ASSOCIATED PRODUCTS

MODEL SS-800AVS

NON-DIRECTIONAL RADIOBEACON

MANUAL #80AVS-90-2

BOX 5345, BEAUMONT, TEXAS 77726-5345 USA; TELEPHONE: (409) 842-1717; CABLF" SAC; TELEX: 77-9450: FAX: (409) 842-2987

___~--,-~ E

LIMI~D

ALL IMPLIED WARRANTIZS EXISTING UNDER ~ LAW AItE HY~EBY EXPRESSLY NEGATED;

pARTICOT2L~3IY, COMPANY HEItEBY N~GATES A~D DZSCLAIM~ T~ IMPLIED WARP,~NTY OF

KERCHANTA~ILITY A~D IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PVRPOSEo

If Purchaser believes that these goods do not comply with the express

warranty stated above or any existing and applicable implied warranty which

under the law canno~ be disclaimed or negated as provided above, then

purchaser may request that COMPAB~ inspec~ such goods by mailing, within

s ix~cy (60) days after purchaser k~ows or should have kno~ ~hat the goods

allegedly do not conform with the warranty, postage prepaid, to ~OM~ANY,

P.O. Box 5345, 5000 Belmont, Beaumont, Texas, 77726 Attention: President,

a writing specifying (a) purchaser’s name, address, and telephone mummer,

(b) date of purchase, (c) COMPANY distributor or location from which the

goods were purchased, (d) location of the goods in question (or include the

goods in question with the notice}, and (e} a brief description of the

alleged nonconformity with the warranty. If the goods are covered by, and

do not conform with, the warranty, COMPANY will repair or replace F.O.B.

point of manufacture any such goods; but in no event will COMPANY be

obligated or required to remove the non-conforming goods from their place

of installation or to install the replacement goods. All replacement goods

are warranted to the e~ent provided herein for the remaining te~ of ~his

warranty.

In the

even~

purchaser chooses to commence an action for breach of warranty

or breach of con~rao~ arising out of the sale of the goods pursuan= to this

invoice, the purchaser must

commence

such action within one year after the

cause of action accrues.

THE

RF--~EDY

PROVIDED

H~BEIN SHALL BE THE SOLE ~

EXCLUSIVEREMEDY

FOR

BREACH OF THIS ~%RP2%NTY, FOR ~ BR~ACR OF ANY IMI~LI~D WA/tR~A~TY EXISTING

AND APPLICABLE UNDER TH~ LAW (TO TH~ EXTENT THAT ANY SUC~ WARRAN~ HAS NOT

BEEN SUCCESSFULLY NEGATED AND DISClAIMeD KEREI~AROVE), AND FOR ~ ACT OF

N~GLIGENCY OR ANY OTHER TORTIOUS ACT COMMITTED BY COMPANY, AND IN NO EVENT

SHALL THE

COMPANY ~E LIARLE TO PURCHASER OR ANY THIRD PAR~"~

FOR

ANY

INCIDENTAL,

CONSEQUENTIAL OR SPECIAL DAMAGES RESULTING FROM ANY DEFECT

THE GOODS OR ~

FAILURE OF TH~ GOODS TO CONFORM WITH THIS WAR/%~ATTY OR

ANY

IMPLIED ~

EXISTING AND APPLICABLE UNDER THE LAW (TO T~E EXTENT

THAT

ANY SUCH IMPLIED

~ HA~ NOT BEEM SUCCESSFULLY NEGATED AND DISCLAIMED

~REINA~OVE ).

Table of Contents

1 INTRODUCTION ...........................................

i.I General Description: SS-800AVS .....................

1.2 Specifications: SS-800AVS ..........................

1.3 General Description: PC-1000B ......................

1.4 Specifications: PC-1000B ...........................

2 THEORY OF OPERATION, RADIOBEACON .......................

2.1 Functional Description: SS-800AVS ..................

2.2 Detailed Circuit Analysis: SS-800AVS ...............

....

2.2.1 Synthesizer PWB: ..............................

2.2.2 AM Oscillator PWB .............................

2.2.3 Audio PWB (Optional) ..........................

2.2.4 Keyer .........................................

2.2.4.1 Letter PWB ................................

2.2.4.2 Number PWB ................................

2.2.4.3 AM Recycle PWB ............................

2.2.5 Driver PWB ....................................

2.2.6 Final Stage ...................................

2.2.7 Power Supply ..........................

; .......

2.2.8 Battery System ................................

2.2.9 AM Auto Shutdown PWB ..........................

2.2.10 Power Switch PWB Assembly ....................

2.2.11 Metering Circuit .............................

2.2.12 Reset SSC PWB ................................

3 THEORY OF OPERATION, ANTENNA COUPLER ...................

3.1 FUNCTIONAL DESCRIPTION: PC-1000B ..................

3.1.1 Impedance Transformer ~..~ .....................

3.1.2 Tuner .........................................

3.1.3 Autotune ......................................

3.1.4 Antenna Current/Tuning Meter ..................

3.2 DETAILED CIRCUIT ANALYSIS: PC-1000B ................

3.2.1 Impedance Transformers: .......................

3.2.2 Tuner: ........................................

3.2.3 Autotune ......................................

3.2.4 Antenna Current/Tuning Meter ..................

4 ANTENNAS ...............................................

4.1 Mast Antenna .......................................

4.2 "H" Antenna ........................................

4.3 50-Foot Guyed Mast Antenna .........................

4.4 Symmetrical "T" Antenna ............................

5 INSTALLATION AND OPERATION .............................

5.1 Transmitter Installation ...........................

5.2 Coupler Setup ......................................

SS-800AVS

Southern Avionics

Company

5.3 Synthesizer Adjustment .............................

5.4 Antenna Tune-Up ....................................

5.5 Audio Mode Selection ...............................

103

5.6 Tone Modulation Adjustments ........................

104

5.7 Transmitter Adjustments ............................

105

5.7.1 Autoshutdown and Audio Alignment ..............

105

5.7.2 Autoshutdown Adjustment - Nonvoice System .....

106

5.7.3 Automatic Shutdown Test .......................

106

5.7.4 Final .........................................

107

6 MAINTENANCE ............................................

109

6.1 Cautions and Test Equipment List ...................

109

:~ 6.1.1 General~ Precautions ...........................

109

6.1.2 Specific Precautions ..........................

109

6.1.3 Test Equipment List ...........................

109

6.1.3.1 Field Service or Checkout .................

ii0

6.1.3.2 System Alignment and Calibration ..........

ii0

6.2 System Alignment and Calibration ...................

iii

6.2.1 AM Oscillator PWB .............................

iii

6.2.1.1 Preliminary ...............................

iii

6.2.1.2 Frequency and Modulation Adjustment .......

iii

6.2.2 Audio PWB Adjustment ..........................

112

6.2.3 Antenna System Changes ........................

112

6.2.4 Battery Charger Float Voltage Adjustment ......

113

6.3 Preventive Maintenance .............................

115

6.3.1 Maintenance Log ...............................

115

6.4 Corrective Maintenance .............................

117

6.4.1 Index To Testpoints ...........................

117

7 PARTS LIST .............................................

127

8 MODIFICATIONS ..........................................

163

Southern Avionics SS-800AVS

Company

Table of Figures

Transmitter Enclosure Dimensions .........................

Coupler Enclosure Dimensions .............................

Block Diagram ............................................

Synthesizer PWB Schematic ................................

Synthesizer PWB Assembly ..................................

Synthesizer Programming PWB Assembly .....................

AM Oscillator PWB Schematic ..............................

AM Oscillator PWB Assembly ...............................

Audio PWB Schematic ......................................

Audio PWB Assembly .......................................

Letter PWB Schematic .....................................

Letter PWB Assembly ......................................

Number PWB Schematic .....................................

Number PWB Assembly ......................................

AM Recycle PWB Schematic .................................

AM Recycle PWB Assembly ..................................

Driver PWB Schematic .....................................

Driver PWB Assembly ......................................

Final Stage Schematic ....................................

50 V Power Supply Schematic ..............................

50 Volt Power Supply .........................

, ...........

SSC Battery Standby Schematic ............................

SSC Battery Standby Assembly .............................

AM Auto Shutdown PWB Schematic ...........................

AM Auto Shutdown PWB Assembly ............................

Power Switch PWB Schematic ...............................

Power Switch PWB Assembly ................................

Meter PWB Schematic ......................................

Meter PWB Assembly .......................................

Meter Bracket Assembly ...................................

Auto Shutdown Reset PWB Schematic ........................

Reset SSC PWB Assembly ...................................

Transmitter Schematic ....................................

Transmitter Diagram ......................................

PC-1000 Block Diagram ....................................

PC-1000B Antenna Coupler Schematic .......................

Autotune Motor Drive PWB Schematic .......................

Autotune Motor Drive Pwb Assembly ........................

Antenna Current/Tuning Meter Pwb Schhematic ..............

Antenna Current/Tuning Meter PWB Assembly ................

Antenna Reactance ........................................

Antenna Coupler Cable Connections ........................

Impedance Transformer Taps ...............................

Mast Antenna and PC-1000 Mast Tuned for 190-415 KHz ......

Mast Antenna and PC-1000 Mast Tuned for 415-625 KHz ......

50 Foot Guyed Mast and PC-1000 ...........................

SS-800AVS

Southern Avionics

Company

iii

Symmetrical "T" Antenna and PC-1000 ......................

Synthesizer Bands ........................................

Control and Testpoin Positions ...........................

Southern Avionics SS-800AVS

Company

1 INTRODUCTION

1.1 General Description: SS-800AVS

This non-directional beacon is a dual carrier transmitter with an

adjustable output power of up to i00 watts. This is the power of

a single carrier° The second carrier is added to the first during

modulation. This produces a signal withan AM type waveform and an

SSB bandwidth. The bandwidth of a .dual carrier emission is the

same as the audio tone (either 1020 Hz or 400 Hz).

The transmitter operates on 115/230 VAC, 50/60 Hz or 48 VDC.

An automatic shutdown circuit is included that automatically shuts

down the transmitter if power falls below an adjustable level, if

the ident signal fails, or if extreme distortion is present. When

a dual system is used, the shutdown signal is used to transfer to

the standby transmitter°

A current and voltage limiter protects the transmitter from line

surges or voltage and current surges in the final due to accidental

shorts or improper tuning.

The transmitter is in a rain-tight enclosure that permits it to be

mounted out-of-doors at the base of the antenna.

SS-800AVS

Southern Avionics

Company

14.0

(35.56)

iOOOR

¯ 11.5

’

I 25(TYP)

FRONT

VIEW SIDE VIEW

7.0 ~I I_ 3.0

~ (17.78)

. ~-(7.5~)

BOTTOM

VIEW

CONDUIT ENTRANCE LOCATIONS

NOTES=

IN/OUT CONNECTIONS ARE MAOE WITH

FLEXIBLE CONI~JI! THROUGH

THE BOTTOM.

THIS DRAWING NO. 1471 REV. B .

DIMENSIONS IN INCHES (CM).

NET. wT. 4SLBS.(2OKGL

TRANSMITTER ENCLOSURE DIMENSIONS

Southern Avionics

Company

SS-800AVS

1.2 Specifications: SS-800AVS

QUALIFICATIONS: Meets applicable requirements of the Federal

Aviation Administration (FAA), Federal Communications Commission

(FCC), and International Civil Aviation Organization (ICAO).

FREQUENCY: 190-625 KHz.

FREQUENCY CONTROL AND STABILITY: Crystal controlled synthesizer.

Rotary dial selection in KHz steps, at integral or half integral

KHz; stability better than 0.005% (-50° to +70°C). Programming

boards are used to cover 190 to 625 KHz in bands of 190-250 KHz,

240-340 KHz, 320-415 KHz, and 415-625 KHz.

TYPE OF EMISSION: AO/A2, A3, AO/A2/A3; Keyed code tone modulation

of an RF carrier. Optional voice modulation of RF carrier,

simultaneous voice and code tone modulation of an RF carrier,

non-simultaneous voice and code tone modulation of an RF carrier.

POWER OUTPUT: 20 to i00 watts continuously adjustable into a 50

ohm load. Power increases during modulation.

MODULATION: Keyed 400 Hz or 1020 Hz tone, International Morse Code,

any combination of up to three letters or numerals, and/or optional

voice modulation. Modulation percentage adjustable from 0-i00

percent. Code modulation percent to 100% with voice signal absent

or to 20% with voice signal present.

BANDWIDTH: 800 or 2040 Hz depending on tone frequency. Up to 6000

Hz for voice transmission.

HARMONIC DISTORTION: All harmonics are more than 63 dB below the

i00 watt carrier, measured at a dummy antenna simulating a SAC Mast

Antenna°

CIRCUIT PROTECTION: Lightning protection on power line and antenna

connection. Circuit breaker in power line. Fuse in power line to

final circuit. Zener protection and fuses on transistors in final

circuit. Special current and voltage limiting circuit on 50V DC

line.

METERING: RF output power, DC current in one of the final transistors,

DC voltmeter, reflected power.

WORKING CONDITIONS: Continuous unattended operation in the following

environments: Ambient temperature, -50° to +70°C; Relative humidity,

0-100%; High salinity as encountered in offshore conditions.

SS-800AVS

Southern Avionics

Company

AUTOMATIC SHUTDOWN: Transmitter shuts down with loss of tone or

continuous tone, or extreme distortion due to a change in load, or

when power falls below a preset value.

AUDIO LINE INPUT: Balanced, 600 ohms ±20%, -17 dBm nominal. Will

accept -28 dBm to +5 dBm. (0 dBm=l mW into 600 ohms). Audio line

direct current shall not exceed 3 mA DC.

TRANSMITTER AUDIO LINE CONTROL CIRCUITS:

Squ@ich

Allows line input signals to pass through to the modulator

when the line signals exceed the squelch trip point.

Controls code signal modulation level (to 95% with line

signal absent, to 20% with line signal present). Operates

with fast attack, slow decay characteristics. Squelch

level adjustable from -30 dBm to +5 dBm.

AGC

Maintains a constant average modulation level for line

input signals. At maximum sensitivity, AGC stage will

accept input levels of -28 dBm to +5 dBm without modulation

percent change. Attack and decay times adjusted for voice

type line signals.

Over Modulation Control

Limits modulation of carrier to 100% on severe overload

of AGC circuits. Allows clipping of voice signals to

increase average modulation percentage.

INPUT POWER: 115/230 VAC ±20%, 50/60 Hz, 420 VA maximum, or 48

VDC, 5.5 amperes maximum.

EMERGENCY BATTERY SUPPLY (Optional): When emergency batteries are

used, the optional Battery Standby System automatically keeps the

batteries charged when AC power is available, and automatically

switches to batteries on loss of AC power. Four 105 AH deep cycle

(marine type) 12V batteries, such as Gould AP-105, will operate the

transmitter for approximately 13 hours.

INSTALLATION REQUIREMENTS: The transmitter is supplied in a

weatherproof enclosure. The transmitter and the antenna coupler

are suitable for pole mounting out-of-doors.

Southern Avionics SS-800AVS

Company

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