DRAKE TR-270 User Manual

®

TR270 FM Transceiver

Owner's Manual

POWER

MIC

TR270 FM Transceiver

VOLUME

SQUELCH

A

B

REV +

NUM

TEMP

SCAN

DEC

DTMF

ENC

TOT

PRIO

RPT

DTMF

NUM

HOLD TO SCAN

5

89

0

LOCK

123

4

7

*

SAT

DATA

WXSAT

VOICE

A MODE B

MEM

VFO

6

REV

SAT

B BW

CTS

#

STORE

VOICE

DATA

A

A / B

B

MODE

C

P. OUT

D

SETUP

W N

LOCKED

SETUP

LMH

VFO 1 VFO 2

A

B

VFO 1 VFO 2



DCDCONMAIL

XMT

TNC STATUS

TUNING

PW

MEM

TX

RX RX

PW

MEM



STA

is a registered trademark of the R. L. Drake Company

®

WARNING: TO PREVENT FIRE OR

ELECTRICAL SHOCK DO NOT

EXPOSE TO RAIN OR MOISTURE

¡WARNING!

RISK OF ELECTRIC SHOCK

DO NOT OPEN

WARNING: TO REDUCE THE RISK OF ELECTRIC

SHOCK,

DO NOT REMOVE COVER

NO USER-SERVICABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

Important Safeguards i

An appliance and cart combination should be moved with care. Quick stops, excessive force and uneven surfaces may cause the appliance and cart combination to overturn.

The lightning flash with arrow head symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

WARNING:

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO NOT OPEN THE CABINET, REFER SERVICING TO QUALIFIED PERSONNEL ONLY.

CAUTION:

TO PREVENT ELECTRIC SHOCK, DO NOT USE THE THREE WIRE CORD WITH AN EXTENSION CORD RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.

ATTENTION:

POUR PREVENIR LES CHOCS ELECTRIQUES, NE PAS UTILISER CETTE FICHE POLARISEE AVEC UN PROLONGATEUR, UNE PRISE DE COURANT OU UNE AUTRE SORTIE DE COURANT, SAUF SI LES LAMES PEUVENT ETRE INSEREES A FOND SANS EN LAISSER AUCUNE PARTIE A DECOUVERT.

1. Read Instructions—All the safety and operating instructions should be read before the appliance is operated.

2. Retain Instructions—The safety and operating instructions should be retained for future reference.

3. Heed Warnings—All warnings on the appliance should be adhered to.

4. Follow Instructions—All operating and use instructions should be

followed.

5. Cleaning—Unplug this appliance from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleansers. Use a damp cloth for cleaning.

6. Do Not Use Attachments—not recommended by the manufacturer or they may cause hazards.

7. Water and Moisture—Do not use this product near water—for example, near a bathtub, wash bowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool—and the like.

8. Accessories—Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may fall, causing serious injury to a child or adult, and serious damage to the appliance.

9. Ventilation—This product should never be placed near or over a radiator or heat register. This product should not be placed in a built-in installation such as a bookcase or rack unless proper ventilation is provided or the manufacturer’s instructions have been adhered to. Any slots or openings in the cabinet are provided for ventilation. To ensure reliable operation of the video product and to protect it from overheating, these openings must not be blocked or covered. The openings should never be blocked by placing the product on a bed, sofa, rug, or other similar surface.

10. Grounding or Polarization—This product is equipped with a 3- wire line cord receptacle. It is intended for use with a 3-wire properly grounded power socket. Do not defeat the safety purpose of the supplied line cord and plug. 10A. Mise à la terre ou Polarisation—Cet appareil est équipé avec un cordon d'alimentation à trois fils. Il est a brancher sur une prise ayant un connecteur a la terre. Assurez-vous que la connection a la terre ne manque pas.

11. Power Sources—This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supplied to your home, consult your appliance dealer or local power company.

12. Power-cord Protection—Power-supply cords should be routed so they are not likely to be walked on or pinched by items placed upon or against them. Pay particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.

13. Lightning—For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet.

14. Power Lines—An outside antenna system should not be located in the vicinity of overhead power lines, other electric light or power circuits, where it can fall into such power lines or circuits. When installing an outside antenna system, extreme care should be taken to keep from touching such power lines or circuits as contact with them may be fatal.

ii Important Safeguards, continued

15. Overloading—Do not overload wall outlets and extension cords as this can result in a risk of fire or electric shock.

16. Object and Liquid Entry—Never push objects of any kind into this product through openings as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on the product.

17. Servicing—Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.

18. Damage Requiring Service—Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions:

a. When the power-supply cord or plug is damaged. b. If liquid has been spilled, or objects have fallen into the product. c. If the product has been exposed to rain or water. d. If the product does not operate normally by following the operating

instructions. Adjust only those controls that are covered by the operating instructions. An improper adjustment may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation.

e. If the product has been dropped or the cabinet has been damaged. f. When the product exhibits a distinct change in performance—this

indicates a need for service.

19. Replacement Parts—When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or have the same characteristics as the original parts. Unauthorized substitutes may result in fire, electric shock or other hazards.

20. Safety Check—Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in proper operating condition.

21. Outdoor Antenna Grounding—Before attempting to install this product, be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built-up static charges. a. Use No.10 AWG (5.3mm No.17 AWG (1.0mm

2

) copper, No.8 AWG (8.4mm2) aluminum,

2

) copper-clad steel or bronze wire or larger, as ground wire. b. Secure antenna lead-in and ground wires to house with stand-off insulators spaced from 4 feet (1.22m) to 6 feet (1.83m) apart. c. Mount antenna discharge unit as close as possible to where lead-in enters house. d. A driven rod may be used as the grounding electrode where other types of electrode systems do not exist. Refer to the National Electrical Code, ANSI/NFPA 70-1990for information. e. Use jumper wire not smaller than No.6 AWG 13.3mm

2

) copper or

equivalent, when a separate antenna grounding electrode is used.

"EFFECTUER LE CABLAGE CONFORMEMENT AU CODE CANADIEN DE L' ELECTRICITE"

" INSTALL WIRING ACCORDING TO THE CANADIAN ELECTRICAL CODE"

ΕΞΑΜΠΛΕ ΟΦ ΑΝΤΕΝΝΑ ΓΡΟΥΝ∆ΙΝΓ

ΑΝΤΕΝΝΑ ΛΕΑ∆ ΙΝ ΩΙΡΕ

ΓΡΟΥΝ∆ ΧΛΑΜΠ

ΑΝΤΕΝΝΑ ∆ΙΣΧΗΑΡΓΕ ΥΝΙΤ (ΝΕΧ ΣΕΧΤΙΟΝ 810−20)

ΕΛΕΧΤΡΙΧ ΣΕΡςΙΧΕ ΕΘΥΙΠΜΕΝΤ

ΝΕΧ − ΝΑΤΙΟΝΑΛ ΕΛΕΧΤΡΙΧ ΧΟ∆Ε

ΓΡΟΥΝ∆ΙΝΓ ΧΟΝ∆ΥΧΤΟΡΣ (ΝΕΧ ΣΕΧΤΙΟΝ 810−21)

ΓΡΟΥΝ∆ ΧΛΑΜΠΣ

ΠΟΩΕΡ ΣΕΡςΙΧΕ ΓΡΟΥΝ∆ΙΝΓ ΕΛΕΧΤΡΟ∆Ε ΣΨΣΤΕΜ (ΝΕΧ ΑΡΤ 250, ΠΑΡΤ Η)

Table of Contents iii

Thank you for purchasing a Drake TR270 FM Transceiver. This transceiver has been designed and manufactured to high quality standards, and will provide reliable operation for many years.

Important Safeguards

Table of Contents

Specifications and Accessories

Introduction

General Description Safety / Voltage Selection

Installation

Unpacking Location Fixed Installation Portable / DC Power Installation Antenna Requirements Installation Diagram

Front Panel Description

Microphone Connector Wiring Sense

i

iii

iv

1 1 2

4 4 4 4 4 4 5

6 7

Please carefully read the Owner's Manual in order to take advantage of the many interesting features that will provide enjoyable radio operation.

Voice Operation FM Simplex Operation Repeater Operation

Standard Offsets Custom Offsets Subaudible Tone Operation DTMF Operation To store A Phone Number To Transmit A Stored Phone Number Inband Repeat Operation Crossband Repeat Operation

Satellite Operation

Introduction To Satellite Operation The Amateur Satellites-Modes and Frequencies Doppler Frequency Shift Correction FM voice Operation With A Satellite 9600 Baud Packet Operation With A Satellite

27 27 27 27 27 28 28 29 29 29 30

31 31

33 33 33

34

Front Panel Display

Rear Panel Description

Getting Started

Beep Tones Getting Started (Initial Settings) Dual VFO's Direct Frequency Entry

Setup Menu

Restore Factory Setup Settings

Memory Functions

Memory Channel Programming Recalling A Memory Channel Changing Memory Channel Construct A Memeory List Locking A Memory Channel Restore Factory Memory Programming

Scan Functions

Scan Memory Scan VFO Locking A Memory Channel

8

10

12 12 12 13 13

14 14

20 20 20 20 20 21

21

22 23 25 26

Computer Control Computer Interface With The

RS-232C Port Command Set To Save A Report

Data / FAX Operation Data Operation With The Optional

TNC 270 (Terminal Node Controller) Fax Operation With The Optional DEMOD270

Suggested References

Glossary of Terms

Quick Reference Guide

Service

Warranty

FCC Warning

The user is cautioned that changes or modifications not expressly approved by the R. L. Drake company could void the user's authority to operate the equipment. NOTE: In order for an installation of this product to maintain compliance with the limits for a Class B device, shielded cables must be used.

37

38 38 40

41

42

43

45

52

53

iv Specifications and Accessories

RECEIVER 'A' (2M only)

Receive Frequency Range:

IF Frequencies:

Sensitivity:

Selectivity:

Adjacent Channel Rejection:

IMD (in band) and Spurious Responses:

144.00 - 148.00 MHz (142 - 150 MHz reduced specifications)* 1st IF: 10.7 MHz 2nd IF: 455 kHz <0.18 µV, 12dB SINAD (144 - 148 MHz) 12 kHz min. @ -6 dB

-75 dB min. @ ± 20 kHz

-80 dB min. @ ± 25 kHz

-80 dB min.

Squelch Sensitivity:

Image Rejection:

Audio Power Output:

TRANSMITTER

Transmit Frequency Range:

Transmit Power Output:

Modulation Mode:

Deviation, max.:

Spurious Emissions:

Microphone Impedance:

Antenna 2 Preamp Power:

Packet Data Rate:

Antenna Impedance:

Memory Channels:

Tuning Steps:

/ Frequency Stability:

IF Rejection:

Protection:

GENERAL

<0.10 µV

-80 dB min.

-80 dB min. 2W into 8 Ohms @ less than 5% distortion.

144.00 - 148.00 MHz (142 - 150 MHz reduced specifications)* 1/10/25 Watts (144 to 148 MHz) 16KF3E Frequency Modulation. 5 kHz peak.

-60 dBc (-80 dBc in-band). 500 Ohms. Overtemperature and high VSWR.

13.6 VDC nominal @ 100 mA 1200/9600 bps (G3RUH compatible) 50 Ohms 400 total: 100 (00-99) each receiver, A and B. 100 SAT mode 100 WXSAT mode

5, 10, 12.5, 15, 20, 25 kHz, 1 MHz ( / buttons only). ±5ppm (0

±10ppm (-100C to +500C)

0C

to +400C)

Current Requirement, receive:

Current Requirement, transmit:

ACCESSORIES FOR THE TR270:

TNC270 module DEMOD270 module Carrying handle

Voltage Requirement:

Operating Temperature:

Case Size:

Weight:

RECEIVER 'B' (wide coverage)

Receive Frequency Range:

IF Frequencies:

Sensitivity:

Selectivity:

Adjacent Channel Rejection:

IMD: (in-band):

IF Rejection:

Image Rejection:

*142 - 150 MHz operation with proof of MARS or CAP license.

115 or 230 VAC ± 10%, 50/60 Hz, 75 Watts or 11 - 16 VDC, negative Ground.

13.6 VDC @ 1.2A, nominal.

13.6 VDC @ 8A max. (high power RF output).

-100C to +500C ambient. Width 11", Height 4-3/4", Depth 13-1/2" 13 lbs. (5.9 Kg.)

136 - 174 MHz and 420 - 470 MHz 1st IF: 18 MHz 2nd IF: 455 kHz

0.25µV/12 dB SINAD 15 kHz or 40 kHz @ -6 dB, selectable.

-60 dB min. @ ± 25 kHz, N BW

-75 dB min. @ ± 50 kHz, W BW or N BW

-75 dB min. 75 dB min. 60 dB min.

Introduction - General Description 1

MIC

TUNING

B

A MODE B

A

SQUELCH

123

4

5

6

89

7

0

REV

SAT

B BW

LOCK

STORE

CTS

RPT

DTMF

PRIO

VFO

MEM

#

A / B

A

MODE

B

P. OUT

C

SETUP

D

NUM

*

VOLUME

HOLD TO SCAN

TNC STATUS

LMH

NUM

TEMP

SCAN



DTMF

TOT

DEC ENC

DATA

VOICE

SAT

WXSAT

DATA

VOICE

LOCKED

SETUP

W

N



XMT



DCDCONMAIL

REV

+

TX



STA

VFO 1 VFO 2

PW

MEM

RX RX

VFO 1 VFO 2

PW

MEM

A

B

TR270 FM Transceiver

POWER

DESCRIPTION

The TR270 is a table-top, base station, amateur radio 2 Meter FM Transceiver plus an additional extended range FM receiver. Microprocessor control and synthesized tuning permit full transceive capability on transmitter/ receiver ‘A’ from 144 to 148 MHz*, while receiver ‘B’ permits independent reception in the extended range of: 136 - 174 MHz, and 420 - 470 MHz. Transceiver ‘A’ is capable of 25 Watts RF output, with output power easily programmable from the front panel keypad for high, medium and low power output levels. Receiver ‘B’ is operational regardless of the receive/transmit status of transceiver ‘A’. Independent Volume and Squelch controls are provided for both the ‘A’ and ‘B’ receivers. Control of either ‘A’ or ‘B’ is via the front panel keypad and frequency tuning is accomplished by the Tuning

wheel,

/ buttons, or by direct entry for the

selected transceiver/receiver. Either receiver is capable of carrier detect or time scanning. Scanning can be by frequency limits or a memory scan. The TR270 has 400 programmable memory locations that are allocated as follows: 100 memories for Transceiver ‘A’, 100 memories for Receiver ‘B’, plus 100 additional memories assigned to ‘WXSAT’, and 100 memories for the ‘SAT’ (satellite) mode of operation. Both transceiver ‘A’ and receiver ‘B’ can operate simultaneously.

The front panel liquid crystal display provides visual feedback to the operator of the current status of the transceiver/receiver. Programming of the transceiver/ receiver's parameters is easily accomplished by the front panel display and setup menu. Parameters are adjusted and set by using the tuning wheel and keypad.

*142 - 150 MHz operation with proof of MARS or CAP license.

The unit permits DTMF and CTCSS tone encoding/ decoding of transceiver ‘A’. A hand held microphone with push-to-talk feature is included with the TR270. DTMF functions can be initiated from the TR270 front panel keypad. Both receivers permit subaudible tone decoding and/or subaudible tone filtering.

In addition to normal voice FM communication, the TR270 provides interfaces for both an internal packet TNC and an external packet TNC. The optional, internal, plug-in Drake TNC270 permits more efficient setup and improved operation than an external TNC allows, since the compatible setup commands/protocols are designed into the TR270 for the internal TNC. The packet interfaces provide for 1200 bps or G3RUH compatible 9600 bps operation. Either receiver ‘A’ or ‘B’ can be switched to either TNC interface. An RS-232C port is provided for PC control of the TR270 and TNC270. PC software is provided with the DRAKE® TNC270 option.

The optional, DRAKE® DEMOD270, AM/FM, demodulator card, can also be installed to receive weather fax (WEFAX) data, ACARS (In Flight Aircraft Reporting Service) data, or HF FAX data. Weather satellite (WXSAT) reception in the 137 MHz band is also provided by the TR270 with the DEMOD270 installed. S-Band weather satellite reception is possible with the addition of an external downconverter prior to the TR270 with DEMOD270 combination. ACARS reception requires a receiver with aircraft band coverage. HF FAX reception requires a receiver with HF band SSB coverage. The demodulated audio data stream is supplied to the TR270 RS-232C Interface connector. PC software is provided with the Drake DEMOD270 option.

2 Introduction - Safety / Voltage Selection

WARNING

NOTE: THE FOLLOWING PROCEDURE REQUIRES REMOVAL OF AN

EQUIPMENT COVER THAT EXPOSES POTENTIALLY LETHAL VOLTAGES IF

THE EQUIPMENT IS POWERED FROM AN AC POWER SOURCE. REFER

NOTE: A magnetized screwdriver facilitates the removal and installation of screws in the procedure that follows:

SERVICING TO A QUALIFIED TECHNICIAN ONLY.

A) DISCONNECT THE TRANSCEIVER FROM ITS SOURCE OF AC POWER.

B) Remove the top cover from the transceiver by removing (6) Black screws, #6-32 x 1/4" PAN PHL. Retain the cover and screws for later reassembly.

115 OR 230 VAC

SET INTERNALLY

FACTORY SET : 115 V

FUSE

LINE

3 A,250 V

115 V

SLO - BLO T 1.6 A,250 V

+13.6 V

50

A N T E N N A 2

RECEIVE ONLY

VHF/UHF

+13.6VDC @100 mA

SWITCHED

CAUTION:

- RISK OF FIRE REPLACE FUSE AS MARKED AFTER DISCONNECTING UNIT

FROM AC LINE.

E X T S P K R

8

50

A N T E N N A 1

RECEIVE : VHF/UHF

TRANSMIT : 144 - 148 MHz

25 WATTS

MADE IN U.S.A.

R

BY

ATTENTION:

- RISQUE D'INCENDIE REMPLACEZ FUSIBLE DU TYPE INDIQUE APRES DEBRANCHER DU SECTEUR.

I N T E R F A C E

R S - 2 3 2 C

F A X /

D E M O D

INPUT

E X T E R N A L

T N C

D C I N P U T

+

13.6 VDC 6A

+

@

GND

230 V

50/60 Hz 75 WATTS

FUSE

C) Locate the power supply cover. Remove the cover by removing (2) Screws, #4-40 x 1/4" PAN PHL Zinc from the left-hand side of the unit and by removing (2) Nuts, Hex #M3 x 6mm from the right-hand side of the compartment cover. Remove the cover by carefully releasing it from the exposed studs at the right-hand side of the cover. Retain the cover, screws, and nuts for later reassembly.

(2) 1/4" screws

(2) hex nuts

(metric)

Power Supply

Cover

Introduction - Safety / Voltage Selection, continued 3

WARNING!!! Please read before applying power

The transceiver is normally shipped for operation on 115 VAC, 50/60 Hz AC input line voltage. If your operating voltage is different than this, please refer to FIGURE 1 on this page. An internal jumper permits changing the allowable AC input voltage to a nominal 230 VAC. In addition, the rear panel accessible mains fuse must change accordingly. Please be certain of the operating voltage before connecting the transceiver to the mains source.

_________________________________________________________________ Note: The warranty does not cover damage as a result of improper voltage selection, or replacement of the fuse with ratings other than those specified. _________________________________________________________________

WARNING

NOTE: THE FOLLOWING PROCEDURE REQUIRES REMOVAL OF AN

EQUIPMENT COVER THAT EXPOSES POTENTIALLY LETHAL VOLTAGES IF

THE EQUIPMENT IS POWERED FROM AN AC POWER SOURCE. REFER

SERVICING TO A QUALIFIED TECHNICIAN ONLY.

D) Ensure that the jumper is set for either the 115 VAC or the 230 VAC position as required for the AC Mains supply. Install the proper fuse at the rear panel of the TR270.

CAUTION

In accordance with international safety standards, this instrument is equipped with a three-wire power cable receptacle. The unit is shipped with a detachable type three-wire power cable intended for nominal 115 VAC mains supply. When connected to an appropriate power line outlet, this cable grounds the instrument cabinet. For operation of this unit on nominal 230 VAC mains supply, use the proper power cable assembly approved by your local codes. For use of this product outside the U. S. A. or Canada on supply voltages of 220 VAC or greater, the discharge resistor (4.7 Meg Ohm) connected from the neutral wire terminal of the AC input receptacle to the receiver chassis must be removed.

115 VAC

JUMPER (factory setting)

Fuse: 3A, 250V (5x20mm) SLO-BLO

(factory installed)

JUMPER

FIGURE 1 - AC Mains

Voltage Selection

230 VAC

Fuse: T1.6A, 250V (5x20mm)

E) Reinstall the power supply compartment cover by

using the cover, screws, and nuts removed in step C. F) Reinstall the transceiver top cover using the (6) Black

#6-32 x 1/4" screws PAN PHL that were removed in step B.

4 Installation

UNPACKING

Carefully remove the transceiver from the shipping carton and examine it for evidence of damage. If any damage is noted, immediately contact the transportation company responsible for delivery or return the unit to the dealer from whom it was purchased. Keep the shipping carton and all packing material for the transportation company to inspect. The original carton and packing material should be retained for repackaging should it be necessary to return the unit. Inspect the packing material for any accessories or printed material before storing the box. Locate the registration card, fill out, and immediately return to the R. L. Drake Company to insure registration and validation of warranty.

LOCATION

The location of the transceiver is not critical so long as adequate clearance is provided to allow air circulation in and around the unit, especially adjacent to the rear panel mounted heatsink. To prevent overheating, do not cover any ventilation slots in the top cover.

Side View of Transceiver

FIGURE 2 HEAT SINK

Heat Sink

PORTABLE/DC POWER INSTALLATION

For use in a portable environment, the transceiver includes an unfused external DC input connector. This connector is located on the rear panel. The transceiver will operate with a DC input voltage of 11-16 VDC. Full high power RF output during transmit is insured with a nominal supply voltage of 13.6 VDC or higher, as are supplied by typical automotive systems. The transceiver may be powered from the vehicle’s cigarette lighter socket. An approved method is to make fused wire connections at the vehicle battery. Connect DC power observing correct polarity and fusing (10 A Fast Blow maximum) to avoid possible vehicle wiring damage and/or fire. Connect the antenna(s) to the appropriate antenna input(s) using 50 Ohm coax between the antenna and the transceiver.

ANTENNA REQUIREMENTS

The receiver incorporates internal switching to allow two separate antenna systems to be connected simultaneously. The unit will transmit out the ANTENNA 1 connector only, so a resonant 2-meter antenna must be connected to ANTENNA 1. A separate single-band or multiple-band antenna can also be connected to the ANTENNA 2 connector. By simple setup programming, either of the connected antennas can be split to either receiver ‘A’ or ‘B’ for the receive mode. Additional setup programming permits dedicated antenna usage or automatic antenna selection by corresponding band, VHF/UHF, or by frequency range. The typical antennas for use with this transceiver will include Verticals, Beam, or Ground Plane types with 50 Ohm coaxial cable feeds. The best antenna will depend upon the desired frequency coverage and the intended communication link distance.

FIXED INSTALLATION

After unpacking the unit and checking that the intended AC line voltage matches the internally set range (factory set for 115 VAC) and corresponding fuse is installed, connect the antenna system to the appropriate antenna input(s). Connect AC cord to mains voltage. Connect any other external equipment at this time. Refer to Figure 3 for the diagram of a typical fixed installation.

Installation, continued 5

VERTICALS, BEAM, GROUND PLANE

+13.6 V

50

A N T E N N A 2

RECEIVE ONLY

VHF/UHF

+13.6VDC @100 mA

SWITCHED

CAUTION:

- RISK OF FIRE REPLACE FUSE AS MARKED AFTER DISCONNECTING UNIT FROM AC LINE.

E X T S P K R

8

- OR - - OR -

50 OHM COAXIAL

CABLE

PL-259

50

A N T E N N A 1

RECEIVE : VHF/UHF

TRANSMIT : 144 - 148 MHz

25 WATTS

MADE IN U.S.A.

BY

ATTENTION:

- RISQUE D'INCENDIE REMPLACEZ FUSIBLE DU TYPE INDIQUE APRES DEBRANCHER DU SECTEUR.

R

MAX.

I N T E R F A C E

R S - 2 3 2 C

F A X /

D E M O D

INPUT

E X T E R N A L

T N C

D C I N P U T

+

13.6 VDC 6A

+

GND

ATTENTION: LOCATE ANY

RECEIVER ANTENNAS SOME DISTANCE AWAY FROM TRANSMITTER ANTENNAS TO AVOID POSSIBLE DAMAGE TO THE RECEIVER.

115 OR 230 VAC

SET INTERNALLY

FACTORY SET : 115 V

FUSE

LINE

3 A,250 V

115 V

SLO - BLO T 1.6 A,250 V

230 V

FUSE

50/60 Hz 75 WATTS

@

EXTERNAL

SPEAKER

TERMINAL

OR PC

TO EXTERNAL

TNC UNIT

FROM SW8, R8 SERIES RECEIVER LINE AUDIO OUT FOR CW, RTTY,

HF FAX, WE FAX RECEPTION

(with optional Drake DEMOD270)

Standard 12 VDC Power Plug (fused) (or approved accessory connector)

Vehicle 12 VDC accessory

---------- ---------

---

--

connection

Fuse 10 A (Fast Blow)

FIGURE 3 INSTALLATION DIAGRAM

EXTERNAL DC CONNECTOR

(supplied)

AC POWER

CORD

CONNECTION

6 Front Panel Description

8 1 2

TR270 FM Transceiver

REV +

NUM

POWER

VOLUME

SQUELCH

A

MIC

B

TEMP

SCAN



DEC

DTMF

ENC

TOT

PRIO

RPT

DTMF

NUM

HOLD TO SCAN

5

89

0

LOCK

123

4

7

*

SAT

DATA

WXSAT

VOICE

A MODE B

MEM

VFO

6

REV

SAT

B BW

CTS

#

STORE

VOICE

DATA

A

B

C

D

A / B

MODE

P. OUT

SETUP

W N

LOCKED

SETUP

LMH

VFO 1 VFO 2

A

B

VFO 1 VFO 2



DCDCONMAIL

XMT

TNC STATUS

TUNING

PW

MEM

TX

RX RX

PW

MEM



STA

6 7 5 4 3

FIGURE 4 FRONT PANEL

1) POWER ON/OFF Switch - This switch turns the transceiver on or off. When the unit is off, the display will be blank. AC power is interrupted to the unit with the switch in the off position.

2) Display - The backlit, liquid-crystal display provides the current status of both receiver ‘A’ and ‘B’, such as operating frequency, received signal strength, relative transmit power, memory number, scan mode, simplex/ duplex operation with repeater offset sense, TNC modes/setups, etc. Refer to FRONT PANEL DISPLAY, in this manual, for a full description.

3) TUNING (VFO) - The tuning wheel and the

/

buttons are the primary tuning controls of the transceiver. Clockwise rotation of the tuning wheel increases frequency and counterclockwise rotation decreases frequency. The tuning wheel also incorporates two-speed tuning. Rotating the tuning wheel faster results in an increased tuning speed. The transceiver also accepts direct numeric frequency entry from the numeric keypad buttons, see Item 4.

The / buttons also function to permit setting parameters in certain programming operations. The

/ buttons are the only auto-repeating buttons.

TUNING WHEEL STEPS The transceiver can be programmed to tune in different resolutions (steps) with the corresponding display readout, as follows:

Transceiver ‘A’: 5, 10, 15, 20, and 25 kHz steps. Receiver ‘B’: 5, 10, 12.5, 15, 20, and 25 kHz steps.

/ BUTTON STEPS

The button increases and the button decreases the frequency by fixed 1 MHz steps with each

depression of the button.

In the setup mode, the tuning wheel and the

/

buttons permit scrolling and selection of various trans-

ceiver parameters. The tuning wheel and

/

buttons are also used to scroll through memory channels in the memory mode of operation.

Front Panel Description, continued 7

4

RPT

4) Program Buttons -

1

- Press once to switch the selected transceiver/

PRIO

receiver frequency to the programmed priority channel frequency. Press and hold for approximately 2 seconds to initiate the priority watch mode.

2

- Press once to put the selected transceiver/

VFO

receiver in the VFO tuning mode. For the selected transceiver/receiver, press this button to toggle between VFO1 and VFO2. Also, press and hold this button to initiate a VFO scan.

3

- Press once to recall the current memory

MEM

channel for the selected transceiver/receiver. Select memory channel by direct numeric entry or scroll

through with tuning wheel or / buttons. Press

- Press for a second function keyshift. When

*

NUM

pressed, the orange button functions are active, (i.e. 0-9, *, #, A, B, C, D).

0

- In the MEMORY mode, press this button to

LOCK

lockout the displayed memory channel during a memory scan. Otherwise, press and hold this button to lock/unlock all front panel buttons and tuning wheel entries.

#

- Press to store selected entries when

STORE

programming.

A

- Press this button to alternately direct the

A / B

tuning and other keypad operations to the ‘A’ transceiver or ‘B’ receiver.

and hold to initiate MEMORY channel scan.

- Press to manually select the repeater offset

direction or simplex.

5

- With the repeater status displayed, press this

REV

button to reverse the repeater input/output frequency format.

6

- Press to automatically configure the trans-

SAT

ceiver for the satellite communication mode.

7

- Press to select a programmed phone number

DTMF

for dialing. Up to 10 phone numbers can be stored.

8

For Transceiver ‘A’ - Press once to display the

CTS

current CTCSS tone frequency. Press a second, third and fourth time before the display times out or within approximately 3 seconds to select ‘ENC’, ‘DEC/ENC’, or no tone on transmit or receive as required. The selected state will remain operational after the display times out.

For Receiver ‘B’ - Press once to display the current CTCSS tone frequency. Press a second and third time to enable or disable ('OFF') the tone decoding as required.

9

- Press to select either 15 kHz or 40 kHz IF

B BW

bandwidth for receiver ‘B’. The 40 kHz bandwidth is normally used only for weather satellite FAX reception. NOTE: receiver ‘A’ bandwidth is not selectable.

B

- For transceiver 'A', press to select VOICE or

MODE

DATA (if TNC assigned to 'A') or STANDBY mode. For receiver 'B', press to select VOICE, DATA (if TNC assigned to 'B'), WXSAT or STANDBY mode.

C

- Press to set the relative transmit power output

P. OUT

level to low, medium, or high power.

D

- Press and hold for approximately 2 seconds to

SETUP

put the transceiver into the setup mode. The display will indicate the particular function and parameter that is being programmed. Refer to the Setup Menu section of this manual for details.

5) VOLUME/SQUELCH Controls - Independent controls permit setting the volume level and squelch threshold for receivers, ‘A’ and ‘B’.

6) Microphone Connector - Four pin microphone connector. Wiring sense is as follows:

1

Audio

PTT

2

4 +10 VDC

GND 3

Front View

7) Speaker - This is the opening for the internal speaker.

8) Headphone Jack - This connector accepts a 1/8"

mono headphone connector. The internal speaker and external speaker (if connected) are switched off when using the headphones.

8 Front Panel Display

1

16

17

18

19

REV +

NUM

TEMP

SCAN DTSS DTMF

TOT

REV +

DEC ENC

DATA

VOICE

SAT

WXSAT

DATA

VOICE

20

21 22 12 13 2 15 11 10 5 9

14

FIGURE 5 FRONT PANEL DISPLAY

1) 6-Digit Numeric Display Readout - This display indicates frequency, in ‘MHz’, for the ‘A’ transceiver’s current VFO, Priority, or Memory channel. Frequencies from 144.000 to 148.000 MHz will be displayed*.

2) 7-Digit Numeric Display Readout - This display indicates frequency, in ‘MHz’, for the ‘B’ receiver’s current VFO, Priority, or Memory channel. Frequencies from 136.0000 to 174.0000 MHz, or from 420.0000 to

470.0000 MHz will be displayed.

3) VFO 1/VFO 2 - Indicates the selected VFO for transceiver ‘A’.

4) /PW/MEM/ / for Transceiver ‘A’ - ‘ ’ lights to indicate operation on the Priority channel. ‘PW’ lights to indicate that the Priority Watch mode is active. ‘MEM’ lights to indicate that the MEMORY mode is selected. The Memory channel number will be displayed adjacent to ‘MEM’ in the 2-digit display.

The lights to indicate that the selected memory channel will be skipped during a memory scan.

5) VFO 1/VFO 2 - Indicates the selected VFO for receiver ‘B’.

6) /PW/MEM/ / for Receiver ‘B’ - Same functions as described for Item 4, but this section refers to receiver ‘B’.

7 & 8) TX/RX Indicators - Displays Transmit (TX) mode and relative output power level or Receive (RX) mode and the relative signal strength. Item 7 refers to Transceiver ‘A’; Item 8 refers to Receiver ‘B’.

9) TNC STATUS Indicators (for optional TNC270 use) -

XMT - TNC is in the transmit state. DCD - Data Carrier Detect indicates that a valid data stream is present.

23 24 3

LMH

VFO 1 VFO 2

A

B

LMH

LOCKED

W

SETUP

N

CON (connect) - TNC is connected to a station STA (status) - TNC is reporting its status MAIL - Flashes to indicate that a message is waiting.

10) LOCKED Indicator - Lights to indicate that all

keypad button functions, wheel are locked out.

11) SETUP - Lights when the transceiver is in the SETUP mode. SETUP parameters are then shown in various portions of the display as appropriate.

12) SAT - Lights to indicate that the transceiver 'A' and receiver 'B' are configured for the Satellite mode of operation.

13) WXSAT - Lights to indicate that the receiver 'B' is configured for the weather satellite mode of operation.

14) DATA/VOICE/Indicators - Separate indicators for Transceiver ‘A’ and Receiver ‘B’.

DATA - Unit is in the DATA mode which permits TNC communications. When ‘A’ is in the DATA mode, TNC audio is sent to the transmitter and the front panel MIC input is disabled.

VOICE - Unit operates as a normal audio transceiver (‘A’) or receiver (‘B’). The front panel MIC input is active when ‘A’ is in the VOICE mode.

A STANDBY mode is indicated as follows: Transceiver ‘A’ - ‘DATA’, ‘VOICE’, ‘SAT’ and the frequency readout are all turned off.

Receiver ‘B’ - ‘DATA’, ‘VOICE’, ‘WXSAT’ and the frequency readout are all turned off.



XMT

VFO 1 VFO 2

DCDCON

PW

MEM

TX

RX

TX

RX

PW

MEM



4



MAIL

STA

/ buttons and tuning

7

8

6

*142 - 150 MHz operation with proof of MARS or CAP license.

15) W/N Indicators - Wide or narrow IF filter is selected for receiver ‘B’.

16) - /+/REV Indicators - Refers to transmit offset selection.

A) ‘-’ lit: Receive frequency is displayed, transmit frequency is 600 kHz lower in frequency (unless variable offset is programmed).

B) ‘+’ lit: Receive frequency is displayed, transmit frequency is 600 kHz higher in frequency (unless variable offset is programmed).

C) ‘REV’ lit: Receive frequency is displayed; receive and transmit frequency are interchanged, regardless of offset value: ‘-’, or ‘+’.

D) Blank: Simplex mode. Transmit and receive frequencies are the same.

E) Both ‘-’, and ‘+’ lit: Variable offset-Receive frequency is displayed in the current VFO and the transmit frequency is in the other VFO.

Front Panel Display, continued 9

17) NUM Indicator - When lit, keypad is in the numeric entry mode.

18) TEMP Indicator - When lit, maximum output power is being intentionally limited to avoid possible final amplifier damage due to excessive operating temperature.

19) SCAN Indicator - When lit, unit is in a VFO or MEMORY channel scan mode.

20) DTMF Indicator - Flashes to indicate that a phone number can be changed or dialed upon transmit.

21) TOT Indicator - Time-out-timer applied to the transmitter.

22) DEC/ENC Indicators - ‘DEC’ lights to indicate that the Continuous Tone Coded Squelch System (CTCSS) is active in the receive mode. ‘ENC’ lights to indicate that the CTCSS tone is transmitted. These DEC/ENC indicators apply to transceiver ‘A’ only.

23) L/M/H Indicators - Low, medium, and high power settings for transciever ‘A’.

/

24)

A

indicates the active receiver for keypad or tuning entries.

Indicators - A around either A or B

B

10 Rear Panel Description

2 1 8

+13.6 V

50

A N T E N N A 2

RECEIVE ONLY

VHF/UHF

+13.6VDC @100 mA

SWITCHED

CAUTION:

- RISK OF FIRE REPLACE FUSE AS MARKED AFTER DISCONNECTING UNIT FROM AC LINE.

E X T S P K R

8

TRANSMIT : 144 - 148 MHz

50

A N T E N N A 1

RECEIVE : VHF/UHF

25 WATTS

MADE IN U.S.A.

BY

ATTENTION:

- RISQUE D'INCENDIE REMPLACEZ FUSIBLE DU TYPE INDIQUE APRES DEBRANCHER DU SECTEUR.

R

I N T E R F A C E

R S - 2 3 2 C

F A X /

D E M O D

INPUT

E X T E R N A L

T N C

D C I N P U T

+

13.6 VDC 6A

+

GND

@

115 OR 230 VAC

SET INTERNALLY

FACTORY SET : 115 V

FUSE

LINE

3 A,250 V

115 V

SLO - BLO T 1.6 A,250 V

230 V

FUSE

50/60 Hz 75 WATTS

9 3 4 5 6 7

FIGURE 6 REAR PANEL

1) ANTENNA 1 - This connector is the antenna input/ output of Transceiver ‘A’. Attach a 50 Ohms nominal impedance coaxial feed line from the antenna. Ensure that the connected antenna is resonant in the 144 - 148 MHz (2-Meter) range prior to transmitting. This connector accepts a standard PL-259 plug.

2) ANTENNA 2 - This connector is the antenna input to Receiver ‘B’. Attach a 50 Ohms nominal impedance coaxial feed line from the antenna. This connector accepts a standard PL-259 plug.

3) Interface RS-232C - This 9-pin DB-9 connector provides a standard RS-232C interface to a dumb terminal or PC. Refer to the COMPUTER CONTROL section of this manual.

4) FAX/DEMOD - This RCA connector is an audio input for CW, RTTY, HF/FAX, or WEFAX encoded signals that are to be demodulated by the optional DEMOD270 demodulator module. Input impedance is a nominal 600 Ohms. Provide a nominal 250 mVolt signal level for proper operation.

5) EXTERNAL TNC - This is an 8-pin DIN connector for an optional external TNC. Refer to the TNC's Operation Manual for wiring information. The pin numbers and descriptions are as follows:

Pin#

1 2 3 4 5 6 7 8

Description

TX OUT (1200 B) GND PTT RX IN (1200 B) SQUELCH STATUS TX OUT (9600 B) RX IN (9600 B) SPARE (open)

8

7

6 3 5

1

4

2

Rear Panel Description, continued 11

6) DC INPUT - This connector is used for powering the TR270 from an external DC source such as a car battery. Observe proper polarity when wiring the mating connector. This input is UNFUSED and thus requires an external (10 Amp, FAST BLOW) fuse to be wired in series with the external wiring supplying this connector. The transceiver will operate with a DC input voltage of 11-16 VDC. Full high power RF output during transmit is insured with a nominal supply voltage of 13.6 VDC or higher.

7) AC Power Cord Receptacle - This receptacle accepts a three-wire power cable. When the cable is connected to an appropriate power line outlet, the instrument is grounded. The unit is factory set and fused for operation on a nominal 115 VAC, 50/60 Hz mains supply and is shipped with a cord assembly intended for 115 VAC mains supply. Be certain of the mains supply voltage prior to connecting this unit. For operation of this unit on a nominal 230 VAC mains supply, refer to the SAFETY/VOLTAGE SELECTION section in this manual for internal connections and fusing value. Also use the proper cable assembly approved by your local codes for operation of this unit on nominal 230 VAC mains supplies.

8) AC Line FUSE - This unit is factory set for operation on nominal 115 VAC mains supply and a 3A, 250 V, SLO-BLO (5 x 20 mm) fuse is installed. For operation of this unit on a nominal 230 VAC mains supply, refer to the SAFETY/ VOLTAGE SELECTION section of this manual for internal connections and fusing value.

9) External Speaker - This connector accepts a standard 1/8" diameter, 2-circuit, (monaural) phone plug for connection of an 8-Ohm external speaker. Inserting the phone plug into this connector switches off the internal speaker.

12 Getting Started

TR270 FM Transceiver

POWER

MIC

VOLUME

A

B

SQUELCH

REV +

NUM

TEMP

SCAN



DEC

DTMF

ENC

TOT

PRIO

RPT

DTMF

NUM

HOLD TO SCAN

5

89

0

LOCK

123

4

7

*

SAT

DATA

WXSAT

VOICE

A MODE B

MEM

VFO

6

REV

SAT

B BW

CTS

#

STORE

VOICE

DATA

A

B

C

D

A / B

MODE

P. OUT

SETUP

W N

LOCKED

SETUP

LMH

VFO 1 VFO 2

A

B

VFO 1 VFO 2



DCDCONMAIL

XMT

TNC STATUS

TUNING

PW

MEM

TX

RX RX

PW

MEM



STA

SQUELCH COUNTER-CLOCKWISE

GENERAL OPERATING INFORMATION

This transceiver is easy to use. Please take a few moments to read through this section and familiarize yourself with general operating information.

BEEP TONES

The transceiver responds to all button depressions with an audible beep (unless the function is deactivated). They are as follows:

1 short tone for any button depression (if enabled within the Setup Menu). 3 short, rapid succession tones for confirmation. 1 long, low tone for any invalid button depressions.

VOLUME COUNTER-CLOCKWISE

FIGURE 7

3. Connect the transceiver to a source of AC power. Switch power on to the TR270 with the POWER switch. The front panel display should light and show VFO 1 selected for Receiver ‘A’. If the upper frequency display

is not shown (Standby condition), press the to display ‘VOICE’ in the lower left-hand portion of the

display. Note that the frequency is displayed.

4. Adjust the appropriate VOLUME control (‘A’ or ‘B’) for a comfortable listening level.

5. Tune to the desired receive frequency by using one of several methods covered in this section.

PLEASE NOTE: A ‘ ’ box around ‘A’ or ‘B’ indi-

cates whether transceiver ‘A’ or receiver ‘B’ can be tuned.

B

button

MODE

GETTING STARTED

1. Make certain that an antenna is connected to the appropriate rear panel ANTENNA ‘1’ connector. It is important that this antenna is resonant in the 144 148 MHz range and is capable of handling 25 Watts transmit RF power. An additional antenna can be connected to the ANTENNA ‘2’ connector at this time also, if desired.

2. Please refer to FIGURE 7 and adjust the controls as shown. Connect the microphone.

6. Adjust the SQUELCH control at any time to set the desired received signal strength required to unmute the audio. Usually this control is set to a point that just quiets the receiver when not tuned to a station, and is for example, receiving noise. Rotating the control clockwise requires stronger signals to open the squelch.

7. Prior to transmitting, set low, medium, or high power

C

for transmit by pressing the

P. OUT

button.

6

SAT

STORE

#

Getting Started cont'd. 13

8. Press the microphone PTT button and begin speaking. The transmitted signal frequency is displayed during transmit.

9. To receive on the ‘B’ receiver, Press the

A

button to

A / B

display a box around the ‘B’ (B) adjacent to the lower frequency (7-digit) readout. If the lower frequency

B

display is not shown (Standby condition), press the

MODE

button to display ‘VOICE’ in the lower center portion of the display. Tune to the desired receive frequency by using one of several methods covered in this section (same methods as used for the ‘A’ receiver).

DUAL VFO’s

TRANSCEIVER ‘A’ VFO 1 and VFO 2

Two VFO’s (1 and 2) are provided for the ‘A’ transceiver. Selection is made with the

2

button when ‘A’ is

VFO

selected. Each VFO can be set to any frequency in the ‘A’ tuning range and act as a temporary memory location.

For example, suppose you want 146.190 MHz in VFO 2 while using VFO 1 to tune other frequencies.

2

Press Press cies as desired. To recall VFO 2, Press the

to select VFO 2 and tune to 146.190 MHz.

VFO

2

to select VFO 1 and then tune other frequen-

VFO

2

button.

VFO

RECEIVER ‘B’ VFO 1 and VFO 2

Two VFO’s (1 and 2) are also provided for the ‘B’ receiver. Selection is made with the

2

button when

VFO

B

is displayed. Each VFO can be set to any frequency in the ‘B’ tuning range and act as a temporary memory location. Programming is the same as explained for transceiver ‘A’.

VFO 1 = VFO 2

This function is used to transfer the frequency of the active VFO into the inactive VFO. This is handy if you are tuning and would like to temporarily hold a certain frequency as you continue tuning. For example, suppose you are tuning in VFO 1 and come across a station at 146.190 MHz you would like to occasionally check.

Press the

#

button followed by

STORE

2

(3 confirmation

VFO

beeps). Continue tuning and recall the station at

146.190 MHz anytime by Pressing the

2

VFO

button.

FREQUENCY STEP SELECTION

- Tuning Wheel Steps Transceiver ‘A’: The transceiver can be programmed within the SETUP menu to tune in 5, 10, 15, 20, or 25 kHz steps.

The tuning wheel incorporates two-speed tuning. Rotating the tuning wheel faster, results in an increased tuning speed.

/ Button Steps

-

The button increases and the button decreases the frequency by fixed 1 MHz step increments with each

depression. The button may be held to auto-repeat the frequency change.

DIRECT FREQUENCY ENTRY

Direct keyboard entry of a frequency for either transceiver ‘A’ or receiver ‘B’ is possible by pressing the

*

NUM

button followed by the numeric buttons 0-9 (decimal point understood). With no activity, ‘NUM’ times out in approximately 3 seconds.

Transceiver ‘A’: Ensure that ‘A’ is selected. Press

*

NUM

followed by a numeric entry (6-digits maximum, 3-digits minimum) in the range of 144.000 to 148.000 MHz.

For example: Enter 146.190 MHz

With ‘A’ selected, Press

Press

Receiver ‘B’: Ensure that B is displayed. Press

(NUM is selected)

*

NUM

4

1

PRIO

6

RPT

SAT

9

1

PRIO

0

B BW

LOCK

*

NUM

followed by a numeric entry (7-digits maximum, 3-digits minimum) in the range of 136.0000 to 174.0000 MHz or

420.0000 to 470.0000 MHz. For example: Enter 162.4750 MHz

With ‘B’ selected, Press

Press

(NUM is selected)

*

NUM

1

PRIO

2

VFO

7

4

RPT

5

DTMF

0

REV

LOCK

A partial frequency may be stored quickly by using the

button. A minimum of three valid digits must be

entered. For example: Enter 144 MHz

with 'A' selected, Press

Press

(NUM is displayed)

*

NUM

4

1

PRIO

4

RPT

#

STORE

Receiver ‘B’: The receiver can be programmed within the SETUP menu to tune in 5, 10, 12.5, 15, 20, or 25 kHz steps.

14 Setup Menu

SETUP

D

NOTE: The SETUP mode can be entered only from the Priority, VFO, or Memory states (and from the special

case of Inband or Crossband Repeater configuration).

Press and hold the

POWER

MIC

D

button to display the SETUP menu:

SETUP

TR270 FM Transceiver

VOLUME

SQUELCH

A

B

RESTORE FACTORY SETUP SETTINGS

The TR270 is factory programmed for the default SETUP settings as shown in this section of the manual. To restore ALL factory SETUP settings: - With power off,

press and hold the

button while switching the

power on.

SETUP MODE FUNCTION OPTION/PARAMETER

W N

LOCKED

SETUP

LMH

VFO 1 VFO 2

A

B

VFO 1 VFO 2



DCDCONMAIL

XMT

TNC STATUS

TUNING

PW

MEM

TX

RX RX

PW

MEM



STA

REV

+

NUM

TEMP

SCAN



DEC

DTMF

ENC

TOT

PRIO

RPT

DTMF

NUM

HOLD TO SCAN

5

89

0

LOCK

123

4

7

*

SAT

DATA

WXSAT

VOICE

A MODE B

MEM

VFO

6

REV

SAT

B BW

CTS

#

STORE

VOICE

DATA

A

B

C

D

A / B

MODE

P. OUT

SETUP

In numeric entry mode, press to clear a numeric field.

SETUP MODE

NUMBER FUNCTION

0 0

0 1

0 2

Automatic Repeater Transmit Offset

Set ANTENNA 2 DC Power On or Off

Priority Channel Action

In numeric entry mode, press for quick frequency entry. (Minimum of three digits required).

OPTION / PARAMETER

DESCRIPTION

0 = no offset 1 = automatic offset

0 = Off 1 = On

0 = lock onto detected carrier on designated Priority channel 1 = sound audible beep when a carrier is detected on the Priority channel

Press and hold to enter the SETUP mode. Press to exit the SETUP mode.

These buttons set the desired option or parameter.

DISPLAY

(factory defaults shown)



SETUP



SETUP



SETUP

Rotate to select the desired SETUP function number.

0 or 1

Setup Menu, continued 15

SETUP MODE

NUMBER FUNCTION

0 3

0 4

0 5

0 6

Flow Control for RS232 Transmission and Reception

Tuning Wheel Step Size Receiver 'A'

Tuning Wheel Step Size Receiver 'B'

Assign Internal TNC

OPTION / PARAMETER

DESCRIPTION

0 = No flow control 1 = Hardware handshaking

Set: 5, 10, 15, 20, or 25 kHz

Set: 5, 10, 12.5, 15, 20, or 25 kHz

0 = no TNC installed or unassigned 1 = assign to Transceiver 'A' 2 = assign to Receiver 'B'

DISPLAY

(factory defaults shown)



SETUP



SETUP



SETUP



SETUP

0 or 1

0, 1 or 2

0 7

0 8

0 9

1 0

Assign External TNC

External TNC Data Rate (if connected)

DTMF Transmit Delay

Demodulator Source (if DEMOD 270 demodulator card is installed)

0 = no TNC connected or unassigned 1 = assign to Transceiver 'A' 2 = assign to Receiver 'B'

Set: 1200 or 9600

Set: Delay = 250 mSec. X N where N = 0, 1, 2, 3, 4

0 = audio source internal to TR270 1 = audio source external to TR270

SETUP

0, 1 or 2



0, 1, 2,



3, 4

0 or 1

1 1

Demodulation Type (if DEMOD 270 demodulator card is installed)

0 = AM demodulation 1 = FM demodulation

SETUP

0 or 1



16 Setup Menu, continued

SETUP MODE

NUMBER FUNCTION

1 2

Set audible beep on or off for any button depression

1 3

Set for Normal or Crossband Repeater mode

1 4

1 5

Time - Out - Timer on Transmit

Assign Antenna Input(s) to Receiver 'B' (Receiver A Input is always from ANTENNA 1)

OPTION / PARAMETER

DESCRIPTION

0 = no audible beep when button is pressed 1 = audible beep when button is pressed

0 = normal mode 1 = repeater mode

Set: 0, 1, 2, 3, or 10 minutes 0= no time out

0 = Auto selection Frequency

136-174MHz

420-470 MHz

Receiver B Input

ANTENNA 1 ANTENNA 2

1 = Auto selection

Frequency 142-150MHz 136-142MHz 150-174MHz

420-470 MHz

Receiver B Input

ANTENNA 1 ANTENNA 2 ANTENNA 2 ANTENNA 2

DISPLAY

(factory defaults shown)



SETUP



SETUP



SETUP



SETUP

0 or 1

0, 1, 2 or 3

16 17

18 19

20

Methods for VFO SCAN Stop Receiver A

Methods for VFO SCAN Stop Receiver B

Methods for Memory SCAN Stop Receiver A

Methods for Memory SCAN Stop Receiver B

Receiver A - Program START frequency endpoint for VFO Scan

2 = RECEIVER B Input

is ANTENNA 1

3 = RECEIVER B Input

is ANTENNA 2

For Setups #16,17,18, 19:

SEEK (0) - Stop scan at first

detected carrier and exit

the scan mode.

CARRIER (1) - Stop scan at

a detected carrier, then

resume scan 5 seconds

after carrier drops.

TIME (2) - Stop scan at a

detected carrier, wait 5

seconds, and then resume

scan.

RESUME (3) - Stop scan at

a detected carrier and

resume scan immediately

after carrier drops.

Enter frequency (for

example: 144.0000)

NUM

SETUP

0, 1, 2 or 3



0, 1, 2 or 3



0, 1, 2 or 3



0, 1, 2 or 3



Setup Menu, continued 17

SETUP MODE

NUMBER FUNCTION

21

Receiver A - Program STOP frequency endpoint for VFO Scan

22

Receiver B - Program START frequency endpoint for VFO Scan

23

Receiver B - Program STOP frequency endpoint for VFO Scan

24

25

Set Mode of Memory Scan for Receiver A

Receiver A: Program Memory Channel Number to Define START Endpoint for Range Scan

OPTION / PARAMETER

DESCRIPTION

Enter frequency (for example: 148.0000)

Enter frequency (for example: 136.0000)

Enter frequency (for example: 470.0000)

0 = All memory channels (00 - 99 possible) 1 = A range of memory channels 2 = A list of memory channels (one list of 10 channels)

Press

/ to set desired

number 00-99 (for example: 00)

NUM

DISPLAY

(factory defaults shown)



SETUP



SETUP



SETUP



SETUP



SETUP

0, 1, or 2

26

27

28

29

Receiver A: Program Memory Channel Number to Define STOP Endpoint for Range Scan

Set Mode of Memory Scan for Receiver 'B'

Receiver 'B': Program Memory Channel Number to Define START Endpoint for Range Scan

Receiver 'B': Program Memory Channel Number to Define STOP Endpoint for Range Scan

Press

/ to set desired

number 00-99 (for example: 99)

0 = All memory channels (00 - 99 possible) 1 = A range of memory channels 2 = A list of memory channels (one list of 10 channels)

Press

/ to set desired

number 00-99 (for example: 00)

Press

/ to set desired

number 00-99 (for example: 99)

SETUP



0, 1, or 2



18 Setup Menu, continued

SETUP MODE

NUMBER FUNCTION

30

. .

39

40

. .

49

Receiver A: Construct Memory Channel List (ten lists with a maximum of 10 channels each listSetup 30 - 39)

Receiver 'B': Construct Memory Channel List (ten lists with a maximum of 10 channels each listSetup 40 - 49)

OPTION / PARAMETER

DESCRIPTION

30 = List #0 31 = List #1 . . . 38 = List #8 39 = List #9

40 = List #0 41 = List #1 . . . 48 = List #8 49 = List #9

NUM

List index 0 - 9

with

List index 0 - 9

with

NUM

DISPLAY

(factory defaults shown)



SETUP

Enter a 2-digit memory number.

*

Press entry.

SETUP

Enter a 2-digit memory number.

Press

to clear the

NUM



*

to clear the entry.

NUM

30 - 39

40 - 49

50 51

52

53

54

Set Low level Transmit Power

Set Medium level Transmit Power

Set High level Transmit Power

Sets the scanned frequency range for the SAT SCAN operation

Sets the time between frequency adjustments for the SAT LOCKED (Doppler Tracking) operation

NOTE: Power output is factory set as follows: LOW - 1 Watt, nominal MEDIUM - 10 Watts, nominal HIGH - 25 Watts, nominal

The parameters shown are for example only. For each level, Low, Medium, or High,

press factory set parameter ±3

counts. This action will vary the power ± of the factory set power. Actual power output can be checked with a calibrated RF Wattmeter, if desired.

Press Tuning range of the Scan

Start frequency, in kHz (for example, to set ± 10 kHz range, set the number 10).

Press between frequency adjust-

ments, (for example, to set

0.5 second, set the number

05).

/ to modify the

/ to set the ±

/ to set the time

SETUP

00 = ±0 Hz 01 = ±1 kHz . . . 99 = ±99 kHz

SETUP

00 = 0 Second 01 = 0.1 Second . . . 99 = 9.9 Seconds



Parameters are shown for example



only.

Setup Menu, continued 19

SETUP MODE

NUMBER FUNCTION

55

56

Sets the delay time between the end of a SAT LOCKED condition and the continuation of SAT SCAN

Set LCD backlight intensity

OPTION / PARAMETER

DESCRIPTION

Press time prior to resuming SAT

SCAN, (for example, to set 5 seconds, set the number

05).

Press relative intensity level (for

example: 99)

/ to set the Delay

/ to set the

DISPLAY

(factory defaults shown)



SETUP

00 = SAT SCAN does not resume 01 = 1 Second before SAT SCAN resumes . . . 99 = 99 Seconds before SAT SCAN resumes



SETUP

00 = Dim . . . 99 Bright

57 58

59

60

Set repeater mode high pass audio filter on or off

Set transmit microphone audio filter on or off

Set Receiver 'A' subaudible tone filter on or off

Set Receiver 'B' subaudible tone filter on or off

0 = filter off 1 = filter on

SETUP

0 or 1



0 or 1



0 or 1



0 or 1



20 Memory Functions

STORE

#

STORE

#

The TR270 has 400 programmable memory locations that are allocated as follows:

Transceiver ‘A’: 100 memories. Receiver ‘B’: 100 memories, plus 100 additional memories

assigned to ‘WXSAT’. ‘SAT’ (satellite) mode: 100 memories

These memories can be used to store and recall commonly monitored or operated frequencies. Additionally, two different VFO frequencies and a priority frequency can be programmed for each of transceiver ‘A’ and receiver ‘B’.

With memory locations programmed, various scan functions can be used to automatically monitor desired memory frequencies. The following may be stored in appropriate memory locations:

1) Frequency

2) Transceiver ‘A’: Simplex or Repeater mode with ± offset.

3) VOICE or DATA mode

4) Transceiver ‘A’: CTCSS Encoder and/or Decoder status and frequency. Receiver ‘B’: CTCSS Decoder status and frequency.

5) Lock / unlock status

MEMORY CHANNEL PROGRAMMING

Select a frequency by any tuning or selection method. Selection methods include:

1) Press the

2) Press the

1

button to select the PRIORITY frequency.

PRIO

2

button to select one of two VFO

VFO

frequencies for the selected transceiver ‘A’ or for receiver ‘B’.

3) Press the

memory locations. Turn the tuning wheel, press

buttons, or press

3

button to select 1 of 100 possible

MEM

followed by a 2-digit number

*

NUM

/

entry (00-99) for the desired memory location. Make any adjustments desired, for example; CTS or RPT settings.

- To load successive memory locations quickly, start in the VFO mode with the first desired frequency and the desired starting memory channel number. From the VFO

#

mode, press

3

,

to store the displayed

STORE

MEM

frequency to the previously displayed memory number, advance the memory channel by one, and return to the

VFO mode. Tune to a new frequency and Press

3

,

MEM

. Continue repeating the process.

#

STORE

,

RECALLING A MEMORY CHANNEL

3

From the VFO mode, Press the

and a 2-digit numeric entry corresponding to the

*

NUM

button followed by

MEM

desired memory channel. From the MEMORY mode, additional memory channels are tuned by turning the

tuning wheel, using the the memory channel, or by pressing

/ buttons to increment

followed by a

*

NUM

2-digit numeric entry. To frequency tune after recalling

#

a memory channel, press tion beeps, press the

2

VFO

tune as desired using the tuning wheel,

2

,

STORE

. After the confirma-

VFO

button and then frequency

/

buttons, or by direct numeric entry.

CHANGING A MEMORY CHANNEL

An individual memory channel is changed by storing a new frequency and associated parameters to the same location.

CONSTRUCT A MEMORY LIST

10 lists (0-9), each containing a maximum of any 10 memory channels (00-99 available), can be constructed for both receiver ‘A’ and receiver ‘B’ for the purpose of scanning the channels contained in the respective lists.

Receiver ‘A’:

Setup Mode #24 - set for ‘2’, and Setup Mode #30 - Selects list #0. Construct the list with a maximum of 10 channels. From Setup #30, index from 0-

Whatever is displayed can be stored by one of the following procedures:

- Press

#

followed by

STORE

2

to store the displayed

VFO

frequency into the selected VFO.

- Press

#

followed by

STORE

1

to store the displayed

PRIO

frequency into the priority channel.

- Press

#

followed by

STORE

3

for a flashing memory

MEM

number indication. Enter a 2-digit number (00-99) using the numeric buttons (this operation automatically function shifts the buttons to the NUM mode) to store the displayed frequency to the desired memory location.

9 with the / buttons, Press

followed by a 2-

*

NUM

digit numeric entry for each desired memory channel.



SETUP

NUM



SETUP

List index 0 - 9

with

Enter a 2-digit memory number, or press

*

NUM

the entry.

to clear

Receiver ‘B’:

Setup Mode #27 - set for ‘2’, and Setup Mode #40 - Selects list #0. Construct the list with a maximum of 10 channels. From Setup #40, index from 0-9

with the

/ buttons, Press

followed by a 2-

*

NUM

digit numeric entry for each desired memory channel.



SETUP

NUM



SETUP

Memory Functions, continued 21

RESTORE FACTORY MEMORY PROGRAMMING

3

With power off, press and hold the while switching the power to ‘On’. This action does

the following:

- initializes all 400 memory channels, including standard repeater and packet frequencies in transceiver ‘A’.

- clears all DTMF phone numbers.

- initializes all power-on variables.

- initializes priority channels.

- disables MARS/CAP operation.

MEM

button

List index 0 - 9

with

Enter a 2-digit memory number, or press

*

NUM

clear the entry.

to

LOCKING A MEMORY CHANNEL

Memory channels tagged with the

symbol will be

skipped during the scan process. First be sure the receiver is in the VFO mode (MEM or

SCAN not displayed).

A) Press

with the

3

and select the desired memory location

MEM

/ buttons, or by direct entry of a two-

digit memory channel number. B) To lock out a memory channel: Press

0

LOCK

. The

symbol lights adjacent to the memory channel number. To unlock a memory channel, Press

0

. The symbol

LOCK

will extinguish.

22 Scan Functions

The TR270 is capable of several different methods and modes of scanning frequencies.

Both Receiver ‘A’ and Receiver ‘B’ provide the following: Scan Mode: Either VFO or Memory Scan Method: SEEK (0) - Stop scan at first detected carrier and exit the scan mode. CARRIER (1) - Stop scan at a detected carrier, then resume scan 5 seconds after carrier drops. TIME (2) - Stop scan at a detected carrier, wait 5 seconds, and then resume scan. RESUME (3) - Stop scan at a detected carrier, then resume scan immediately after carrier drops.

Additionally, the subaudible tone squelch may be enabled for either receiver. Either a VFO or Memory scan may be initiated for each receiver.

A mode and a method are programmed together.

Before performing any scan functions,

please read NOTE 1 and NOTE 2.

NOTE 1:

First, it is important to understand how SCAN Range works. Example A refers to two types of VFO scan and Example B refers to two types of Memory scan.

Example A: VFO SCAN

1) Programmed (in SETUP) START frequency limit is lower than the programmed STOP frequency limit:

Direction control during scan: Direction control during scan:

START

limit

(frequency)

= direction when = direction when

SCAN COVERAGE

is used

STOP

limit

(frequency)

- OR -

2) Programmed (in SETUP) START frequency limit is higher than the programmed STOP frequency limit:

JUMP

STOP limit START limit

(EXCLUDED COVERAGE)

Receiver coverage End limit

Direction control during scan:

= direction when is used = direction when

is used

Receiver

coverage

End limit

Example B: MEMORY SCAN

1) Programmed (in SETUP) START memory channel number limit is lower than the programmed STOP memory channel number limit:

START

limit

= direction when is used = direction when

SCAN COVERAGE

is used

STOP

limit

- OR -

2) Programmed (in SETUP) START memory channel number limit is

higher than the programmed STOP memory channel

number limit:

STOP limit

(MEM number)

Receiver coverage End limit

(EXCLUDED COVERAGE)

Direction control during scan:

= direction when is used = direction when

JUMP

START limit

(MEM number)

Receiver

coverage

End limit

is used

Scan Functions, continued 23



SETUP

A / B

A

3

MEM

3

MEM

A / B

A

3

MEM

3

MEM

NOTE 2:

1. Signal detection (stop scan on detected carrier) is dependent upon the strength of the signal, the squelch control setting, and the status of the preprogrammed subaudible tone squelch decoder (CTCSS “off” or “on”).

2. Press the

/ buttons during scan to reverse the

direction of scan, if desired. When starting a scan, the direction is always the same as the last time a scan was ended.

3. To interrupt a scan on either receiver, first press the

A

button to select the particular receiver. Press the

A / B

3

2

,

MEM

VFO

, or

1

to exit the scan mode for that se-

PRIO

lected receiver.

4. While one receiver is being scanned, the opposite receiver (transceiver) can be operated in the normal mode, or set to scan simultaneously.

5. The receiver can be tuned during scan, if desired. It may be useful to tune away from an active frequency, to resume scanning, for example (in all scan stop methods except SEEK). A frequency can also be

entered during scan (press

followed by numeric

*

NUM

entry). After the carrier drops (CARRIER and RESUME) or timeout (TIME) on the tuned frequency, the scan will resume within the programmed (in SETUP) range limits.

SCAN MEMORY

- SCAN ALL UNLOCKED MEMORY CHANNELS

For Receiver ‘A’:

1) Select SETUP #24 - set to ‘0’



SETUP

2) Select SETUP #18 - set to: ‘0’ for a Seek scan ‘1’ for a Carrier scan

‘2’ for a Time scan ‘3’ for a Resume scan

3) Exit the SETUP mode.

4) Press the

5) Press and hold the

Press the

button to select Receiver‘A’.

button to start the scan.

/ buttons during scan to reverse the

scan direction, if desired.

6) Press the

2

,

1

, or

VFO

button to exit the scan

PRIO

mode.

For Receiver ‘B’:

1) Select SETUP #27 - set to ‘0’.

Press and hold the and hold the

2

button to start a VFO scan. Press

VFO

3

button to start a Memory scan. In all

MEM

cases, prior to starting a scan, adjust the SQUELCH control for the appropriate receiver to a setting that just quiets the receiver.



SETUP

2) Select SETUP #19 - set to: ‘0’ for a Seek scan ‘1’ for a Carrier scan

‘2’ for a Time scan

SETUP



‘3’ for a Resume scan

3) Exit the SETUP mode.

4) Press the

5) Press and hold the

button to select Receiver ‘B’.

button to start the scan.

Press the / buttons during scan to reverse the scan direction, if desired.

6) Press the

2

,

1

, or

VFO

button to exit the scan

PRIO

mode.

24 Scan Functions, continued

3

MEM

-SCAN ALL UNLOCKED MEMORY CHANNELS WITHIN A PROGRAMMED RANGE OF MEMORY CHANNELS.

For Receiver ‘A’:

1) Select SETUP #24 - set to ‘1’.



SETUP

2) Select SETUP #25 - set to the desired memory channel number to define the START endpoint for a Range Scan.



SETUP

3) Select SETUP #26 - set to the desired memory channel number to define the STOP endpoint for a Range Scan.



SETUP

4) Select SETUP #18 - set to: ‘0’ for a Seek scan ‘1’ for a Carrier scan ‘2’ for a Time scan ‘3’ for a Resume scan



SETUP

5) Exit the SETUP mode.

6) Press the

7) Press and hold the

A

button to select Receiver ‘A’.

A / B

3

button to start the scan.

MEM

Press the / buttons during scan to reverse the scan direction, if desired.

8) Press the

3

2

,

MEM

VFO

, or

1

button to exit the scan

PRIO

mode.

For Receiver ‘B’:

1) Select SETUP #27 - set to ‘1’.



SETUP

4) Select SETUP #19 - set to: ‘0’ for a Seek scan ‘1’ for a Carrier scan ‘2’ for a Time scan

SETUP



‘3’ for a Resume scan

5) Exit the SETUP mode.

6) Press the

7) Press and hold the

A

button to select Receiver ‘B’.

A / B

3

button to start the scan.

MEM

Press the / buttons during scan to reverse the scan direction, if desired.

8) Press the

3

2

,

MEM

VFO

, or

1

button to exit the scan

PRIO

mode.

-SCAN A LIST OF MEMORY CHANNELS

(ONE LIST OF 10 CHANNELS)

For Receiver ‘A’:

Select LIST scanning:

1) Select SETUP #24 - set to ‘2’.



SETUP

Select a List and Setup channels in the List:

2) Select SETUP #30 (List #0) through #39 (List #9).

NUM



SETUP

3) Construct the list by pressing the / buttons to

select the List index number (0 - 9) and entering the desired 2-digit memory channel number at that se-

lected List index number. [Press

to clear a List index

*

NUM

number (— will appear at a cleared List index number)].

- Setup additional lists by repeating steps 2 and 3.

Select a Scan STOP method:

4) Select SETUP #18 - set to: ‘0’ for a Seek scan ‘1’ for a Carrier scan ‘2’ for a Time scan

SETUP



‘3’ for a Resume scan

2) Select SETUP #28 - set to the desired memory channel

5) Exit the SETUP mode.

number to define the START endpoint fo a Range Scan.

To start a List scan:

SETUP



6) Press the

7) Press and hold the

3) Select SETUP #29 - set to the desired memory channel number to define the STOP endpoint for a Range Scan.

numeric entry of the desired List index number (0 -9), to start the scan.

8) Press the



SETUP

A

button to select Receiver ‘A’.

A / B

button, followed by the

3

2

,

MEM

VFO

, or

1

to exit the scan mode.

PRIO

Scan Functions, continued 25

A / B

A

2

VFO

3

MEM

For Receiver ‘B’:

Select LIST scanning:

1) Select SETUP #27 - set to ‘2’.



SETUP

Select a List and Setup channels in the List:

2) Select SETUP #40 (List #0) through #49 (List #9).

NUM



SETUP

3) Construct the list by pressing the / buttons to select the List index number (0 - 9) and entering the

desired 2-digit memory channel number at that selected List index number. [Press

to clear a lIst index

*

NUM

number (— will appear at a cleared List index number)].

- Setup additional lists by repeating steps 2 and 3. Select a Scan STOP method:

4) Select SETUP #19 - set to: ‘0’ for a Seek scan ‘1’ for a Carrier scan

SETUP



‘2’ for a Time scan ‘3’ for a Resume scan

5) Exit the SETUP mode.

SCAN VFO

A VFO scan permits continuous tuning of frequencies between two programmed limits.

For Receiver ‘A’:

1) Select SETUP #20 - enter the START frequency endpoint from 144 - 148 MHz.

NUM



SETUP

*

2) Select SETUP #21 - enter the STOP frequency endpoint from 144 - 148 MHz.

NUM



SETUP

*

3) Select SETUP #04 - set to 5, 10, 15, 20, or 25 kHz step size.



SETUP

4) Select SETUP #16 - set to: ‘0’ for a Seek scan ‘1’ for a Carrier scan

‘2’ for a Time scan ‘3’ for a Resume scan

SETUP



To start a List scan:

6) Press the

7) Press and hold the

A

button to select Receiver ‘B’.

A / B

3

button, followed by the

MEM

numeric entry of the desired List index number (0 - 9), to start the scan.

8) Press the

3

2

,

MEM

VFO

, or

1

to exit the scan mode.

PRIO

5) Exit the SETUP mode.

6) Press the

button to select Receiver ‘A’.

7) Press and hold the

Press the

/ buttons during scan to reverse the

scan direction, if desired.

8) Press the

2

,

, or

VFO

button to start the scan.

1

to exit the scan mode.

PRIO

*142-150 MHz operation with proof of MARS and CAP license.

26 Scan Functions, continued

For Receiver ‘B’:

1) Select SETUP #22 - enter the START frequency endpoint from 136 - 174 MHz or 420 - 470 MHz.

NUM



SETUP

2) Select SETUP #23 - enter the STOP frequency endpoint from 136 - 174 MHz or 420 - 470 MHz.

NUM



SETUP

3) Select SETUP #05 - set to 5, 10, 12.5, 15, 20, or 25 kHz step size.



SETUP

4) Select SETUP #17 - set to: ‘0’ for a Seek scan ‘1’ for a Carrier scan ‘2’ for a Time scan

SETUP



‘3’ for a Resume scan

5) Exit the SETUP mode.

6) Press the

7) Press and hold the

Press the

A

button to select Receiver ‘B’.

A / B

2

button to start the scan.

VFO

/ buttons during scan to reverse the

scan direction, if desired.

8) Press the

3

2

,

MEM

VFO

, or

1

to exit the scan mode.

PRIO

LOCKING A MEMORY CHANNEL

Memory channels tagged with the symbol will be skipped during the scan process.

3

A) Press

with the

and select the desired memory location

MEM

/ buttons, or by direct entry of a two-

digit memory channel number. If recalling an unprogrammed memory channel with direct entry, an error beep is heard.

B) To lock out a memory channel: Press

0

. The

LOCK

symbol lights adjacent to the memory channel number. To unlock a tagged memory channel, Press

0

. The

LOCK

symbol will disappear.

4

RPT

Voice Operation 27

VOICE OPERATION

The TR270 is capable of FM voice operation over a simplex or repeater frequency pair. Additionally, by using receiver ‘B’, a crossband repeat function is also available. Other selectable options include subaudible tone encode/decode, receiver subaudible tone filter selection, and full DTMF [Dual-Tone Multi Frequency; Touch Tone ®] operation. NOTE: VOICE/DATA modes can be stored using memory channels. Factory defaults are set appropriately for many areas of the United States.

FM SIMPLEX OPERATION

To receive:

1) Select receiver ‘A’ and VFO 1.

2) Tune to the desired frequency by either the main tuning wheel,

/ buttons, or by direct entry.

3. Adjust the volume control for a comfortable listening level.

4. Adjust the squelch control as required. The control is usually set to a point where the receiver audio just mutes when no stations are being received.

To transmit:

1) Be certain that the VOICE mode has been selected with the

2) Press the

B

button.

MODE

4

button until ‘+’ or ‘-’ is extinguished. If

RPT

the indicated frequency is a standard simplex frequency, and SETUP #00 is set for ‘1’ (factory default setting), the ‘+’ or ‘-’ will be automatically turned off.

C

3) Press the

button to select the desired transmit

P. OUT

power, remembering that it is good practice to use as little power as necessary to establish a contact.

4) Monitor the frequency prior to actually transmitting to ensure that you will not interfere with anyone else trying to use the frequency.

5) Press and hold the PTT (Push-to-talk) button on the microphone and speak into the microphone at a normal voice level.

6) Release the PTT button when you are finished speaking to return the TR270 to the receive mode.

REPEATER OPERATION

Repeater operation allows communications over far greater distances than the simplex mode usually provides. Typically the repeater is located on a tall structure or mountain. Repeaters are designed to receive on a certain input frequency and repeat on a different output frequency. The input and output frequencies are separated by an offset frquency, usually + or - 600 kHz. Most amateur radio repeaters utilize this ‘Standard’ offset format. In some rare instances, this standard offset is abandoned, and the input and output frequency offset is a ‘Custom’ offset format. The TR270 is capable of handling both ‘Standard’ and ‘Custom’ offsets.

STANDARD OFFSETS

TR270 Repeater Offsets (Auto mode, Setup #00 = 1):

Repeater Frequency Offset (MHz)

144.000 - 145.095 Simplex

145.100 - 145.495 -600 kHz

145.500 - 145.995 Simplex

146.000 - 146.395 +600 kHz

146.400 - 146.595 Simplex

146.600 - 146.995 -600 kHz

147.000 - 147.395 +600 kHz

147.400 - 147.595 Simplex

147.600 - 147.995 -600 kHz To receive:

1) Select the desired frequency as was described for the Simplex mode of operation.

2) Adjust the volume control for a comfortable listening level.

3) Adjust the squelch control as required. To transmit:

1) Be certain that the VOICE mode has been selected with the

2) Select a ‘Standard’ offset with the

B

MODE

button.

4

button appro-

RPT

priate for the repeater frequency. If the indicated frequency is in a ‘Standard’ offset range as outlined in the previously listed table, and SETUP #00 is set for ‘1’ (factory default setting), the TR270 will automatically select and display the proper offset.

C

3) Press the

button to select the desired transmit

P. OUT

power. Usually a Low power setting is sufficient to ‘hit’ the repeater (provide a good quality signal to the repeater).

4) Monitor the frequency prior to actually transmitting to ensure that you will not interfere with anyone else trying to use the repeater.

5) Press and hold the PTT (Push-to-talk) button on the microphone and speak into the microphone at a normal voice level. The display will change to indicate the transmit frequency.

6) Release the PTT button when you are finished speaking to return the TR270 to the receive mode.

CUSTOM OFFSETS

Sometimes, the input and output frequencies of a repeater will not follow a “standard” convention. For example, the input frequency could be located at one end of the 2-meter band, and the output located at the other end of the band. This type of repeater would require a “custom” offset. The TR270 is easily programmed for “custom” offsets.

B

1) Press the

MODE

button to set the VOICE mode, if not

already set.

2) Enter a valid transmit frequency in VFO 1.

3) Enter a valid receive frequency in VFO 2.

4) Press and hold the

button until both the ‘+’ and

‘-’ indicators are displayed.

28 Voice Operation, continued

5) Monitor the frequency prior to actually transmitting to

ensure that there is no interference with others trying to use the repeater.

6) Press and hold the PTT button on the microphone and

speak into the microphone at a normal voice level. The display will change to indicate the transmit frequency.

7) Release the PTT button when you are finished speak-

ing to return the TR270 to the receive mode.

SUBAUDIBLE TONE OPERATION

The TR270 includes a subaudible encoder/decoder for transceiver ‘A’ and a separate decoder for receiver ‘B’. ‘A’ and ‘B’ tone frequencies may be set independently of each other. ‘A’ may be set to encode only, or to encode and decode. Encoding only will be used when you need to transmit the tone to open the subaudible squelch of a repeater or of any other receiver with subaudible tone squelch activated, but you wish to hear any signals that exceed the signal level threshold set by the squelch control. If you desire the TR270 to only respond to signals transmitting a subaudible tone, the decode function may be activated as well. The status of the encoder and decoder for transceiver ‘A’ is always shown on the LCD display. To see the status of the

decoder for receiver ‘B’, press the

8

button once

CTS

when the ‘B’ receiver is selected for tuning. If the TR270 is used frequently for receiving signals that

are transmitting continuous subaudible tones, it may be desirable to reduce the level of the tone heard in the speaker by enabling a high pass filter. Program SETUP #59 for a ‘1’ to enable the filter for receiver ‘A’; program SETUP #60 for a ‘1’ to enable the filter for receiver ‘B’. In the repeat mode, program SETUP #57 for a ‘1’ to enable a high pass filter in the audio path. Finally, if you are using CTCSS encoding, and the receiving station experiences “talk off” (squelching on voice peaks), program SETUP #58 for a ‘1’ to enable a high pass filter for the microphone audio. All of these high pass filters have a cutoff frequency of approximately 300 Hz. Expect some noticeable loss of low frequency audio response if the filters are enabled.

Transceiver ‘A’ -

To Enable Tone Encode and /or Tone Encode/Decode: Press the

1) Press the

A

button to select receiver ‘A’, if necessary.

A / B

8

button once, and within 3 seconds,

CTS

2) Dial in the desired subaudible tone frequency, using

the main tuning wheel.

3) With the tone frequency displayed, press the

8

CTS

button again to enable tone ENCode.

4) Press the

8

button again to enable tone ENCode/

CTS

DECode.

5) Press the

8

button again to turn the tone Off.

CTS

Receiver ‘B’ -

To Enable or Disable Tone Decoding: Press the

1) Press the

A

button to select receiver ‘B’, if necessary.

A / B

8

button once to see the present setting

CTS

(‘OFF’ indicates that the decoder is disabled), and within 3 seconds,

2) Rotate the tuning wheel or press

/ buttons to set

the desired tone frequency. Allow display to time out. The encoder is now enabled.

Press the setting. Press the

8

button at any time to review the current

CTS

8

button a second time before the

CTS

display times out to toggle between on (tone frequency displayed) or ‘OFF’ without changing the programmed decode frequency.

Subaudible Tone Table:

Nominal Tone Frequency (Hz)

67.0

69.3

71.9

74.4

77.0

79.7

82.5

85.4

88.5

91.5

94.8

97.4

100.0

103.5

107.2

110.9

114.8

118.8

123.0

127.3

131.8

136.5

141.3

146.2

151.4

156.7

159.8

162.2

167.9

173.8

179.9

183.5

186.2

189.9

192.8

196.6

199.5

203.5

206.5

210.7

218.1

225.7

229.1

233.6

241.8

250.3

254.1

DTMF OPERATION

Some repeaters use DTMF (Touch Tone ®) for control purposes and to allow users of the repeater to make telephone calls (Autopatch) through the repeater. The TR270 is capable of generating DTMF tones for this purpose.

DTMF Tone Table: FREQUENCY (Hz) 1209 1336 1477 1633

697 123A 770 456B 852 789C 941 *0#D

The DTMF tones are available anytime the TR270 PTT is pressed.

TO USE DTMF TONES

1) Press PTT on the microphone.

2) Press buttons 0-9, A-D, or *, #. The microphone audio is muted during the time each button is held.

The TR270 permits up to ten, 14-digit DTMF sequences to be programmed and stored in memory. Additionally, two methods of dialing are available.

Voice Operation, continued 29

A / B

A

A / B

A

NUM

*



SETUP



SETUP

D

H

VOICE

LOCKED

N

TX

VFO 1

RX

VFO 1

A

B



SETUP

TO STORE A PHONE NUMBER

1) Press the

7

button, and within 5 seconds, Press 0-9

DTMF

to select a DTMF sequence memory location.

2) Begin entering the phone number. The display will automatically scroll the entered numbers to the left. To view or edit a phone number, rotate the main tuning wheel to scroll and highlight the desired digit that is to be edited. The digit will flash. Enter the new number at that digit location.

3) To erase the entered number and start over, Press the button to clear the display.

4) When all numbers have been entered, Press the

button to store the number.

TO TRANSMIT A STORED PHONE NUMBER

DIALING IF THE PHONE NUMBER IS TO BE DISPLAYED

1) Press the

7

button, and within 3 seconds,

DTMF

2) Select 0-9 (stored phone number will be displayed).

3) Press PTT on the microphone.

4) The displayed phone number will be transmitted after

any delay as set by setup #9.

5) For a pause between digits, skip around dashes when

entering a phone number. For example, entering 9 - - 5551212 would add a pause between ‘9’ and ‘5’.

INBAND REPEAT AND CROSSBAND REPEAT OPERATION

The TR270 can be configured to use the 'B' receiver and 'A' transmitter as a repeater.

Two available methods of repeater mode are Inband repeat and Crossband repeat.

To use the Inband repeat mode, two separate antennas or external duplexer are required.

INBAND REPEAT:

1) Press the followed by the numeric entry of the desired

*

NUM

button to select Transceiver ‘A’. Press

Transmit frequency.

2) Press the

button to select Receiver ‘B’. Press

followed by the numeric entry of the desired Receive frequency. Setup any CTS tones or audio filter as desired.

3) Select SETUP #15 - set to ‘3’ (configures antenna inputs

properly).

4) Select SETUP #13 - set to ‘1’.

DIALING IF THE PHONE NUMBER IS NOT TO BE DISPLAYED

(This mode permits some measure of security against casual viewing of the phone number. Although most repeaters will require manual detection of the dial tone following any required access tone dialing, the access dial number could be recalled from a separate “phone number” memory location and dialed. For this example, the following procedure would “conceal” the number).

1) Press the

7

DTMF

button.

2) Press PTT on the microphone.

3) Select 0-9 (phone number, access number will NOT be displayed)

4) The phone number will be transmitted. Setup mode #9 sets the amount of transmit delay in

250 mSec. increments: 0 = NONE, 1 = 250 mSec., 2 = 500 mSec., 3 = 750 mSec., 4 = 1000 mSec. The delay allows the repeater sufficient time to stabilize following the PTT action and before the first tone is actually transmitted.

This action places the unit in the repeater mode, with the tuning wheel and front panel buttons locked out,

except for the

button. “rP” is displayed for both

(transmitter) ‘A’ and (receiver) ‘B’.

For example:

5) To cancel the Repeat mode function, press and hold

D

the

button until the SETUP #13 is displayed. Set the

SETUP

parameter to ‘0’ in SETUP #13.

30 Voice Operation, continued



SETUP

To use the Crossband repeat mode, only a single antenna is required since the TR270 has an internal crossband duplexer. Two separate antennas may also be used.

CROSSBAND REPEAT (RECEIVE- UHF RANGE, TRANSMIT-2M):

A

1) Press the followed by the numeric entry of the desired

*

NUM

button to select Transceiver ‘A’. Press

A / B

Transmit frequency.

2) Press the

A

button to select Receiver ‘B’. Press

A / B

*

NUM

followed by the numeric entry of the desired UHF Receive frequency.

3) Select SETUP #15 - set to ‘2’ if one antenna is used or

'3' if separate antennas are used.



SETUP

4) Select SETUP #13 - set to ‘1’.



SETUP

This action places the unit in the repeater mode, with the tuning wheel and front panel buttons locked out,

except for the

D

button. “rP” is displayed for both

SETUP

(transmitter) ‘A’ and (receiver) ‘B’.

For example:

H

VFO 1

A

TX

VOICE

N

B

LOCKED

VFO 1

RX

5) To cancel the Repeat mode function, press and hold

D

the

button until the SETUP #13 is displayed. Set the

SETUP

parameter to ‘0’ in SETUP #13.



SETUP

For both repeater modes, CTCSS decode and/or tone filtering may be selected for Receiver ‘B’. Additionally, CTCSS encode may be selected for Transceiver ‘A’.

RECEIVER ‘B’ SUBAUDIBLE TONE DECODE:

If the subaudible tone decoder is enabled for receiver ‘B’, the transmitter will not be keyed unless the (‘B’) received signal has the selected subaudible tone present.

1) Press the

2) Press the tuning wheel or press

A

button to select Receiver ‘B’.

A / B

8

button. Within 3 seconds, rotate the

CTS

/ buttons to set the desired

subaudible tone frequency. After approximately 3 seconds with no change in selection, the display returns

to showing the receiver operating frequency (press button for immediate store). The

8

button can be

CTS

#

STORE

used to toggle between the last set frequency tone and 'OFF'.

3) To cancel the subaudible tone on receive, press the

8

button to display 'OFF'.

CTS

RECEIVER ‘B’ SUBAUDIBLE TONE REPEAT FILTER:

1) Press the

A

button to select Receiver ‘B’, as re-

A / B

quired.

2) Select SETUP # 57 - set to ‘1’.



SETUP

3) Exit the SETUP mode.

4) To cancel the filter, select SETUP #57 - set to ‘0’.

TRANSCEIVER ‘A’ SUBAUDIBLE TONE ENCODE/DECODE:

1) Press the

2) Press the tuning wheel or press

A

button to select Transceiver ‘A’.

A / B

8

button. Within 3 seconds, rotate the

CTS

/ buttons to set the desired

subaudible tone frequency. After approximately 3 seconds with no change in selection, the display returns to showing the receiver operating frequency (press

#

STORE

button for immediate store).

8

3) Press the

button to display the subaudible tone

CTS

frequency. With the subaudible tone frequency dis-

8

played, press the

button to display (set) ENCode or

CTS

DECode/ENCode as desired.

8

4) To cancel the subaudible tone, press the

CTS

button

to extinguish DECode/ENCode.

REPLACE FUSE AS

- RISK OF FIRE MARKED AFTER

DISCONNECTING UNIT

- RISQUE D'INCENDIE REMPLACEZ FUSIBLE DU TYPE INDIQUE APRES DEBRANCHER DU SECTEUR.

CAUTION:

ATTENTION:

A N T E N N A 2

RECEIVE ONLY

VHF/UHF

I N T E R F A C E

R S - 2 3 2 C

F A X /

INPUT

E X T E R N A L

T N C

D C I N P U T

13.6 VDC 6A

+

50/60 Hz 75 WATTS

115 OR 230 VAC

SET INTERNALLY FACTORY SET : 115 V LINE

FUSE 115 V 230 V

3 A,250 V SLO - BLO T 1.6 A,250 V

+13.6VDC @100 mA

FROM AC LINE.

+

GND

SWITCHED

+13.6 V

50

@

FUSE

A N T E N N A 1

RECEIVE : VHF/UHF

50

TRANSMIT : 144 - 148 MHz

25 WATTS

MADE IN U.S.A.

BY

R

8

E X T S P K R

D E M O D

INTRODUCTION TO SATELLITE OPERATION

The TR270 supports both full duplex, packet data and voice operation through the orbiting amateur satellites.

Satellite Operation 31

While most of these satellites travel in polar, low-earth orbits, particular attention must be paid to the antenna system for successful operation. In a polar orbit, as the satellite traverses pole to pole, the earth will rotate below. See Figure 8.

North Pole

Polar Orbit

(Approximately 100

miles altitude)

Equator

Earth's

Rotation

FIGURE 8

This will result in a particular satellite having two “good” passes in a given 24 hour period over a given location. For these “good” passes, simple ground plane type antennas may suffice, although spotty operation due to “nulls” in the antenna’s vertical can be expected. See Figure 9.

Pass Z Pass Y Pass X

Turnstyle 70cm Antenna

for Downlink

Antenna for Uplink

Preamplifier Coax carries

signal and +13.6 VDC power to

Mast

preamplifier

Receive Transmit

SETUP #01 -

Coaxial Cables

FIGURE 10

set to '1' (turns +13.6 VDC power on to ANTENNA 2)

Turnstyle 2m

Mast

TR270

FIGURE 9

32 Satellite Operation, continued

For serious satellite operation, an antenna tracking system is required. Typically, this type of setup consists of two beam type antennas, one for the uplink (2 meters) and one for the downlink (70 cm). The downlink antenna typically also includes a mast mounted, low noise preamplifer. These antennas are co-located on a common mast to which an elevation rotor is attached. This entire assembly is attached to an additional azimuth rotor. See Figure 11. With this antenna arrangement, complete horizon-to-horizon tracking of the satellite is possible. A PC or other computing device is connected to the elevation and azimuth rotors. The PC runs a program which converts the particular satellite’s orbital data (called Keplerian elements, or Keps) and either displays the actual AZ-EL (azimuth-elevation) of the satellite for manual tracking, or directly controls the rotors automatically. For a further, in-depth discussion, refer to AMSAT (Amateur Radio Satellite Corporation) Organization at the following address:

AMSAT 850 Sligo Avenue Suite 600 Silver Spring, MD 20910

Phone: (301) 589-6062 or http://www.amsat.org on the World Wide Web.

To Satellite

70 CM Beam

2 Meter Beam Antenna

Antenna

Elevation Mast

A Z

E L

Mast

Mast Mounted

70cm Preamp

Coax carries signal and +13.6 VDC power to preamplifier.

Contains controller circuits and firmware to calculate AZ/EL (from Keplerian coordinates) for proper antenna aiming to track satellite.

SETUP #01 - set to '1': +13.6VDC Enabled to

Receive Transmit

power Preamp.

+13.6 V 50

A N T E N N A 2

RECEIVE ONLY

VHF/UHF

+13.6VDC @100 mA

SWITCHED

CAUTION:

- RISK OF FIRE REPLACE FUSE AS MARKED AFTER DISCONNECTING UNIT FROM AC LINE.

E X T S P K R

8

50

A N T E N N A 1

RECEIVE : VHF/UHF

TRANSMIT : 144 - 148 MHz

25 WATTS

MADE IN U.S.A.

R

BY

ATTENTION:

- RISQUE D'INCENDIE REMPLACEZ FUSIBLE DU TYPE INDIQUE APRES DEBRANCHER DU SECTEUR.

Coaxial Cables

I N T E R F A C E

R S - 2 3 2 C

AZ/EL Motorized Antenna Mount Controller

F A X /

D E M O D

INPUT

E X T E R N A L

D C I N P U T

+

13.6 VDC 6A

T N C

115 OR 230 VAC

SET INTERNALLY

FACTORY SET : 115 V

FUSE

LINE

3 A,250 V

115 V

SLO - BLO T 1.6 A,250 V

230 V

FUSE

50/60 Hz

@

+

GND

75 WATTS

TR270 Transceiver

FIGURE 11

6

SAT

NUM

*

A / B

A

Satellite Operation, continued 33

THE AMATEUR SATELLITES - MODES AND FREQUENCIES

As of this printing, there are currently four available amateur satellites which will support communications with the properly configured TR270 transceiver. Three of the four satellites are 9600 BAUD AFSK data types and the fourth supports FM voice operation. The following table outlines the operating frequencies and modes of these satellites.

Table 1:

Satellite Downlink Mode Uplink

Frequency Frequency

(MHz) (MHz)

UO-22 435.120 FM, 9600 Baud

data KO-23 435.175 FM, 9600 Baud data KO-25 435.175 FM, 9600 Baud data

436.500

145.900

145.975

145.850

145.900

145.870

145.980

145.870

145.980

AO-27 436.800 FM, Voice

145.850

There are many other possible satellites to “work” (communicate with) such as the SAREX (Shuttle Amateur Radio Experiment) Space Shuttle, the Russian orbiting space station MIR, etc. The TR270 is factory programmed with most of the common satellite frequencies, as listed by Table 2. A total of 100 satellite memories are available to be programmed as desired. The future should permit a large advancement in amateur satellite operation with the launch of Phase 3D. Refer to AMSAT for the latest details on all of the amatuer satellites.

Table 2:

Satellite Channel Memory

Satellite

Downlink

Frequency

(MHz)

Mode

Uplink

Frequency

(MHz)

Number

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19

UO-22 UO-22 KO-23 KO-23 KO-25 KO-25 KO-25 KO-25 AO-27

AO-27 POSAT POSAT

FO-29

MIR SAREX SAREX SAREX SAREX SAREX SAREX

435.120

435.175

436.500

436.800

435.275

435.910

145.550

DATA DATA DATA DATA DATA DATA DATA DATA DATA

VOICE

DATA DATA DATA DATA

DATA VOICE VOICE VOICE VOICE VOICE

145.900

145.975

145.850

145.900

145.870

145.980

145.870

145.980

145.850

145.925

145.980

145.870

145.550

144.490

144.910

144.930

144.950

144.970

144.990

Assuming that the required antenna system is in place to receive the desired satellite, an understanding of how to configure the TR270 for voice and/or data communication through the satellite is required.

DOPPLER FREQUENCY SHIFT CORRECTION

Communication through a satellite requires an understanding of Doppler shift. An example of Doppler shift is the “approaching train” phenomenon. As the train approaches, its horn sound is high in pitch. As the train passes and moves farther away, the pitch of the horn changes to a lower frequency. Similarly, the signal received from the satellite will start at a higher frequency than the published (center) operating frequency as the satellite approaches your location. As the satellite passes over your location and moves farther away, the frequency will change to a value lower than the published (center) operating frequency. To counteract this shift, the TR270 incorporates a method of “locking” onto the satellite’s frequency upon AOS (acquisition of signal) and continuously corrects the receiver frequency throughout the pass until LOS (loss of signal) is encountered. Additionally, the TR270 incorporates a scan range search setting for automatic acquisition of the downlink frequency, a scan pause setting to adjust the rate of scanning, and a scan resume setting to restart a scan if the downlink signal is lost.

FM VOICE OPERATION WITH A SATELLITE

For example, to work the AO-27 satellite: From Table 2, note that Memory Channel 09 selects AO-27 voice frequencies.

1. Enter the SETUP menu and select SETUP #15 = ‘3’. This action will configure the TR270 for separate transceiver ‘A’ and receiver ‘B’ antennas. Also, if using an in-line 70 cm preamplifier, select SETUP #01 = ‘1’ to enable DC power to the ‘ANTENNA 2’ rear panel connector. Press

D

the

2. Press the

button to exit the SETUP menu.

SETUP

button to enter the satellite mode. The

TR270 will display the factory programmed satellite memories. Press the / buttons to select memory

‘09’. Refer to Figure 12 on the following page.

3. Press the

C

button to select the required transmit

P. OUT

power level: Low, Medium, or High. In the Satellite mode, transceiver ‘A’ displays the

transmit frequency, and receiver ‘B’ displays the receive frequency. To alter the contents of a particular memory

channel, if desired, rotate the tuning wheel or press followed by numeric frequency entry to tune either

transceiver ‘A’ or receiver ‘B’, as selected. Press the button to select transceiver ‘A’ or receiver ‘B’, as required. To store these new frequencies, if desired,

press the

#

button followed by the

STORE

3

button and

MEM

enter the desired 2-digit memory number using the numeric buttons (this operation automatically shifts to the NUM mode).

34 Satellite Operation, continued

Additionally, the currently displayed frequencies may be copied to the main VFOs in transceiver ‘A’ and receiver ‘B’ for use after exiting the SAT mode. With the frequen-

cies displayed in the ‘SAT’ mode, press the followed by the

2

VFO

button.

To exit the SAT mode, at any time, press the

In SAT mode: Lights to indicate that scanning is enabled.

In SAT mode: Indicates a relative discriminatior voltage. A count of '50' indicates that the receiver is

#

button

STORE

2

button.

VFO

Flashes prior to the receiver acquiring lock. Lights continuously after lock

is achieved. tuned exactly to the satellite signal.

H

A

TEMP

SCAN

SAT

VOICE

N

TX

B

RX

MEM



Typical display in SAT mode

SAT mode permits (00-99) SATELLITE mode memory channels.

FIGURE 12

Using the desired tracking software (Traksat, Wisp, Instatrak, etc.), a determination of the sateliite’s position can be calculated. Some programs also indicate the Doppler offset. If the tracking software that is being used has this feature, tune receiver ‘B’ to the proper frequency using the main tuning wheel.

As mentioned earlier, the TR270 will automatically track the Doppler shift and correct the frequency of receiver ‘B’. To enable this feature, once the initial frequency is tuned and a relative tuning indication number between

‘48’ and ‘52’ is displayed, press the

6

button. The

SAT

‘SCAN’ indicator will illuminate and the upper right symbol will illuminate continuously. Now, as the downlink frequency changes, the TR270 will automatically tune the frequency of receiver ‘B’ to track the changing frequency. If the signal fades, a scan will initiate and the receiver will hunt to acquire the carrier again. At this

time, the symbol will flash to indicate a loss of lock on the downlink signal. When the scan sequence acquires the downlink signal, the relative tuning indication will

again read ‘50’ and the symbol will illuminate continuously.

After LOS, the TR270 will begin scanning through a programmed frequency range anticipating the next satellite pass.

The range is programmed within SETUP #53. The indicated number may be set from ‘00’ through ‘99’ (0 to ±99 kHz, in 1 kHz increments). The factory default setting is ‘10’ (±10 kHz scanning range of center frequency).

The scan pause time, which is the time between frequency updates, is programmed within SETUP #54. The indicated number may be set from ‘00’ through ‘99’ (0 through 9.9 seconds, in 0.1 second increments. The factory default setting is ‘05’ (0.5 second). The scan resume time, which is the delay time between the end of a satellite locked condition and the resuming of satellite scan, is programmed within SETUP #55. The indicated number may be set from ‘00’ through ‘99’ (0 through 99 seconds, in 1 second increments). The factory default setting is ‘05’ (5 seconds).

At this point, note that the upper right MEM indicator has changed to a relative tuning indication. Maintain this number at a count of ‘50’ to keep the receiver centered on the actual downlink frequency of the satellite. As the satellite passes, continue to tune the main tuning wheel to maintain a count of ‘50’. If the count goes above ‘50’ tune up in frequency. If the count goes below ‘50’, tune down in frequency.

The TR270 defaults to full duplex operation, which permits hearing the transmitted signal on the downlink during transmit on the uplink frequency. If this is annoy-

ing, press the

5

button to toggle receiver ‘B' off during

REV

transmit.

9600 BAUD PACKET OPERATION WITH A SATELLITE

Data operation with the PACSATS is slightly more complicated than voice operation, requiring specific software for data communications. A highly recommended software package, available from AMSAT, is the WISP (Windows Satellite Protocol) program. It is a complete turnkey software package specifically designed for PACSAT operation. Refer to AMSAT for additional details. This program processes and places all downloaded data, from a satellite pass, into specific directories.

Satellite Operation, continued 35

H

SCAN

SAT DATA

N



XMT



DCDCONMAIL

TX



STA

RX

MEM

A

B

For example, to work the UO-22 satellite: From Table 2, note that Memory Channel 00 selects UO22 data frequencies.

1. Enter the SETUP menu and select SETUP #15 = ‘3’. This action will configure the TR270 for separate transceiver ‘A’ and receiver ‘B’ antennas. Also, if using an in-line 70 cm preamplifier, select SETUP #01 = ‘1’ to enable DC power to the ‘ANTENNA 2’ rear panel connector. Press

D

the

button to exit the SETUP menu.

SETUP

If the optional TNC270 is installed,

- Select SETUP #06 = ‘2’ (assigns the internal TNC270 to receiver ‘B’).

- Select SETUP #07 = ‘0’ (no external TNC).

- OR If a properly wired external TNC is installed,

- Select SETUP #06 = ‘0’ (no internal TNC).

- Select SETUP #07 = ‘2’ (assigns external TNC to receiver ‘B’).

- Select SETUP #08 = ‘9600’ (9600 Baud data). With the TNC properly installed and assigned,

2. Press the

6

button to enter the satellite mode. The

SAT

TR270 will display the factory programmed satellite memories. Press the / buttons to select memory

‘00’. Refer to Figure 13.

In SAT mode: Lights to indicate that scanning is enabled.

In SAT mode: Indicates a relative discriminatior voltage. A count of '50' indicates that the receiver is

Flashes prior to receiver acquiring lock. Lights continuously after lock

is achieved. tuned exactly to the satellite signal.

Typical display in SAT mode

SAT mode permits (00-99) SATELLITE mode memory channels.

FIGURE 13

Using the desired tracking software (Traksat, Wisp, Instatrak, etc.), a determination of the satellite’s position can be calculated. Some programs also indicate the Doppler offset. If the tracking software that is being used has this feature, tune receiver ‘B’ to the proper frequency using the main tuning wheel.

C

3. Press the

button to select the required transmit

P. OUT

power level: Low, Medium, or High. In the Satellite mode, transceiver ‘A’ displays the

transmit frequency, and receiver ‘B’ displays the receive frequency. To alter the contents of a particular memory

channel, if desired, rotate the tuning wheel or press

*

NUM

followed by numeric frequency entry to tune either transceiver ‘A’ or receiver ‘B’, as selected. Press the

A

A / B

button to select transceiver ‘A’ or receiver ‘B’, as required. To store these new frequencies, if desired,

press the

#

button followed by the

STORE

3

button and

MEM

enter the desired 2-digit memory number using the numeric buttons (this operation automatically shifts to the NUM mode).

Additionally, the currently displayed frequencies may be copied to the main VFOs in transceiver ‘A’ and receiver ‘B’ for use after exiting the SAT mode. With the frequencies displayed in the ‘SAT’ mode, press the

2

followed by the

VFO

button.

To exit the SAT mode, at any time, press the

#

STORE

2

button

button.

VFO

At this point, note that the upper right MEM indicator has changed to a relative tuning indication. Maintain this number at a count of ‘50’ to keep the receiver centered on the actual downlink frequency of the satellite. As the satellite passes, continue to tune the main tuning wheel to maintain a count of ‘50’. If the count goes above ‘50’ tune up in frequency. If the count goes below ‘50’, tune down in frequency.

36 Satellite Operation, continued

The TR270 defaults to full duplex operation, which permits monitoring the transmitted signal on the downlink during transmit on the uplink frequency. The operation is always full duplex in the data mode.

As mentioned earlier, the TR270 will automatically track the Doppler shift and correct the frequency of receiver ‘B’. To enable this feature, once the initial frequency is tuned and a relative tuning indication number between

‘45’ and ‘55’ is displayed, press the ‘SCAN’ indicator will illuminate and the upper right (lock)

symbol will illuminate continuously. Now, as the downlink frequency changes, the TR270 will automatically tune the frequency of receiver ‘B’ to track the changing frequency. If the signal fades, a scan will initiate and the receiver will hunt to acquire the carrier again. At this time, the (lock) symbol will flash to indicate a loss of lock on the downlink signal. When the scan sequence acquires the downlink signal, the relative tuning indication will again read ‘50’ and the (lock) symbol will illuminate continuously.

After LOS, the TR270 will begin scanning through a programmed frequency range anticipating the next satellite pass.

6

button. The

SAT

The range is programmed within SETUP #53. The indicated number may be set from ‘00’ through ‘99’ (0 to ±

-99 kHz, in 1 kHz increments). The factory default setting is ‘10’ (±10 kHz scanning range of center frequency).

The scan pause time, which is the time between frequency updates, is programmed within SETUP #54. The indicated number may be set from ‘00’ through ‘99’ (0 through 9.9 seconds, in 0.1 second increments. The factory default setting is ‘05’ (0.5 second). The scan resume time, which is the delay time between the end of a satellite locked condition and the resuming of satellite scan, is programmed within SETUP #55. The indicated number may be set from ‘00’ through ‘99’ (0 through 99 seconds, in 1 second increments). The factory default setting is ‘05’ (5 seconds).

The receiver’s front panel display will indicate TNC status, for example: XMT,DCD, etc.

2

To exit the SAT mode, press the

button.

VFO

Computer Control 37

The TR270 rear panel includes a standard DB-9F connector which conforms to the RS-232C serial data communications standard. The transceiver is configured to be a DCE device. As such, the transceiver may be controlled with a standard dumb terminal or PC running any standard terminal emulation software such as PROCOMM PLUSTM, BITCOM

TM

, Windows Terminal Program, etc.

This interface provides for direct control of the transceiver's front panel, including volume and squelch. The front panel controls can be locked out when under computer control

by pressing and holding the

0

LOCK

button.

Please refer to FIGURE 14 for individual pin and signal description.

Rear Panel View of TR270 RS-232C Connector

I N T E R F A C E

13245

NOTE:

The following additional items apply when using the RS-232C Interface capability of the transceiver:

FCC WARNING: SHIELDED INTERFACE CABLES MUST BE USED WITH THIS TRANSCEIVER FOR FCC COMPLIANCE TO LIMITS FOR A CLASS B DIGITAL DEVICE.

When interfacing the transceiver to a computer utilizing a 25 pin male connector for the RS-232C serial port, the following wiring convention should be followed:

Transceiver DB9F

Connector

1 2 3 4 5 6 7 8 9

Computer DB25M

Connector

8 3 2

20

7 6 4 5

22

Computer DB9M

Connector

1 2 3 4 5 6 7 8 9

8679

R S - 2 3 2 C

1 2 3 4 5 6 7 8 9

PROCOMM PLUS Technologies, Inc. P.O. Box 1471 Columbia, MO 65205

BITCOMTM is registered to BIT Software, Inc. 830 Hillview Court, Suite 160 Milpitas, CA 95035

Function

DCD TXD RXD N.C. GND DSR RTS CTS N.C.

Signal Description

Data Carrier Detect Output Transmit Data Output Receive Data Input No Connection ______ Ground Ground Data Set Ready Output Ready to Send Input Clear to Send Output No Connection ______

FIGURE 14 RS-232C Interface Connections

TM

is registered to DATASTORM

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

- Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and the transceiver.

- Connect the equipment into an outlet on a circuit different from that to which the transceiver is connected.

- Consult the dealer or an experienced radio/TV technician for help and for additional suggestions.

The user may find the following booklet prepared by the Federal Communications Commission helpful: "How to Identify and Resolve Radio-TV Interference Problems." This booklet is available from the U.S. Government Printing Office, Washington D.C. 20402, Stock No. 004-000-00345-4.

38 Computer Control, continued

Computer Interface with the RS-232C port

1) Before connecting your terminal or PC to the TR270,

set the data protcol to 9600 Baud, 8 data bits, no parity, 1 stop bit. Additionally, select Full duplex ON and hardware handshake (RTS/CTS) ON. The connecting cable must provide the RTS and CTS connections in addition to all other required connections as outlined previously in this Computer Control section. If a terminal emulation program such as PROCOM PLUSTM is used, the DIRECT CONNECTION should be chosen rather than MODEM CONNECTION. This will avoid sending modem Init strings to the TR270.

2) Make appropriate connections to the TR270.

3) If the optional TNC270 Packet Data Controller is

installed, one of two prompts will be received. If the TNC is not installed (SETUP #06 set for ‘0’), an “>” will be received as the prompt. If the TNC270 is installed (and SETUP #06 is set for ‘1’ to assign the TNC to transceiver ‘A’, or set for ‘2’ to assign the TNC to receiver ‘B’), the following will be received as the prompt:

CMD:

4) If the TNC270 is installed, a “Radio On” command must be issued at the 'CMD:' prompt in order to control the TR 270. At this point, the “>” prompt will be visible, indicating proper communication to the TR 270. To return to the TNC270 command prompt, enter 't' CR or 'T' CR.

COMMAND SET

All numbers in these commands are in ASCII. Either upper or lower case is permitted for commands. Commands are only valid in the TR270 states that permit them; there is no difference between local and remote operation in this regard. It is receommended that the keypad be locked while the host PC controls the radio, but the keypad and host can concurrently control the radio operation. It is also recommended that the keypressed (beep) indication be disabled to reduce annoying noise from the radio during host PC commands. The host communications port should be set to full duplex mode, so the channel can communicate with both the TNC and radio properly. The host should not send ASCII characters in the range 80 to FF hex. Characters in the range E0 to FF hex are reserved for internal radio use, and the other “8-bit characters” are not recognized.

Any errors in syntax will result in an error indication sent to the host, which consists of bell and “!” characters. Any errors in misplaced operation (commands not proper for the current radio mode/state) will result in an error beep locally, just as an improper button pressed on the front panel keypad. The TR270 will return the prompt “>” after each command is parsed.

Any whitespace character (space, tab, vertical tab, formfeed, carriage return, or linefeed) can be used to terminate a command. The block write (“Lx”) commands are fixed-length and require termination. All other commands are self-terminating, but any whitespace character can be used to terminate these commands before optional digits. This action will permit filling in the remaining unspecified frequency digits with zeroes, for example. The symbol “[ ]” brackets used in the charts of this section designate placeholders for the syntax of the block commands and optional numbers in the select commands.

Most commands are intuitive, but some require explanation. The “T” command will permit the host to talk to the internal TNC (if installed). When the host is talking to the TNC, the “RADIO ON” command can be issued to permit the host to talk to the radio again. VFO scanning, memory channel scanning, and priority watch can be cancelled for a selected receiver by entering VFO, memory channel, or priority states (commands ‘V’, ‘C’, or ‘W’). The ‘V’ command will toggle the active VFO if the transceiver is in the VFO state, unless the receiver is VFO scanning or in the priority watch mode. The ‘H’ command will step the frequency or memory channel in the direction that was last set by the ‘U’ or ‘D’ commands, or by the tuning wheel. The ‘G’ and ‘N’ commands control and set volume and squelch, respectively. Setting volume level ‘99’ results in maximum volume. Setting the squelch to ‘99’ results in full squelch (‘00’ is the no squelch setting). Thus ‘00’ corresponds to the full CCW setting of the respective front panel control, and ‘99’ corresponds to the full CW setting of the control.

Computer Control, continued 39

The unused command characters are “JYZ”. The help command (‘?’) diplays the following table of computer interface commands:

Select Commands (Listed in alphabetical order by COMMAND)

FUNCTION

COMMAND

DESCRIPTION

autopatch B bandwidth memory channel memory channel lock freq/ch step, scan dir set frequency volume/squelch control remote volume level handwheel freq/ch step init keypad/handwheel lock mode volume/squelch control remote squelch setting transmit offset xmit power cts action cts subaudible freq receiver scan select TNC freq/ch step, scan dir vfo priority channel watch xmit/rx reverse

Ax Bx C [xx] Cx D/U Fxxx [xxxx] Gx Gxyy H Ix Kx Mx Nx Nxyy Ox Px Qx Qxx Rx Sx T U/D V [x] W [x] Xx

x = 0-9 (DTMF phone number) x = N, W (implies entry into mem state) x = U, L (also sets handwheel direction) (in current vfo; zero filled) x = Y, N (yes - remote, no - radio controls) x = A, B (receiver), yy = level (00 - 99) (direction can be overriden by handwheel!) x = C, S (memory channels, setup defaults) x = U, L x = V, D, S, W (voice, data, standby, wxsat) x = Y, N (yes - remote, no - radio controls) x = A, B (receiver), yy = setting (00 - 99) x = S, P, M, V (simplex, +, -, variable/odd) x = L, M, H x = N, E, B, D (none, enc, both enc/dec, dec) xx = freq table index (00 - 46) x = A, B x = V, C (vfo, memory channels) (host now talks to internal TNC) (also sets handwheel direction) x = 1, 2 (implies entry into vfo state) x = Y, N (implies entry into priority state) x = Y, N

Block Commands

enquire (read)

load (write)

where: S-setup, c-memory channel, L-LCD segments, B-LCD blinking segments,

D-DTMF phone number, W-priority channel, F-current frequency, G-signal strength meter, I-version ID.

Note that the following select commands act on the currently selected receiver (A or B): 'C', 'D', 'F', 'H', 'M', 'Q', 'S', 'U', 'V', and 'W'.

Note that if a number is not specified in the block read command, ALL data is reported to the host. For example ES<CR> will report ALL active setup functions and settings, one function/setting per line. Otherwise, “ES” requires a two-digit number to specify a particular setup function. “ES”, “EC”, “EL”, and “EB” commands require two-digit numbers, where “ED” requires a one-digit

Ex [d] [y[y]]

Lx [d] [y[y]] = zt

x = commands S, C, L, B, D, W, F, G, I d = designator of A, B, W, [s] for 'C', 'W' cmds. y = number x = commands S, C, D, W, d = designator of A, B, W, [S] for 'C', 'W' cmds. y = number z = data value or string t = command termination character

number. The remaining commands do not permit any number. The range of two-digit numbers for the “EL” and “EB” commands is ‘00’ to ‘26’. “EF” and “EG” act on the currently selected receiver (A or B).

The designators ‘A’, ‘B’, ‘W’, and ‘S’ correspond to receiver A, receiver B, weather sat, and sat respectively. There are 100 memory channels for each of these designations. There is no priority channel in the sat state, therefore “EWS” is an invalid command.

40 Computer Control, continued

The block write commands follow the same logic, and the data value or string sent in the command is identical to the report format of the block read command.

Example report formats (defaults) and commands follow:

Read Command

ES01 ES08 ES23 ES40

ECA59 ECB59 ECW59 ECS59 ED3 EWA EWB EWW EL04 EB06 EF

EG

EI

Report Format

01=0 08=1200 23=4700000 40=--, --, --, --, --, --, --, --, --, --

A59=UV147180N00P146595 B59=UV1605900N00 W59=UV1375900 S59=UV4351750, 145590 3=- - - - - - - - - - - - - A=V145490E12M B=V1450000N00 W=V1376200 B5 00 A1=V145190N00M or B1=V1624750N00 or memory channel report (ECA/B/W/S) or priority report (EWA/B/W) A65 or B65 TR270 Version 1.0

Write Command

LS01=1<CR> LS08=9600<CR> LS23=4700000<CR> LS40=11, 22, 33, 44, 55, 66, 77, 88, 99, - -<CR>

LCA59=UV147180N00P146595<CR> LCB59=UV1605900D12<CR> LCW59=1375900<CR> LCS59=UV4351750, 145590<CR> LD3=#*1234567890AB<CR> LWA=V145490E12M<CR> LWB=V1450000D25<CR> LWW=V1376200<CR>

Note that ‘-’ can be used in “LD” and “LS4x” commands to specifiy unused digits or memory channels. The valid digits in the “LD” command are 0-9, A-D, ‘#’, and ‘*’.

For memory channel reports/commands, the first character is the channel status (U - unlocked, or L locked), the second character is the channel mode (V voice, D - data), followed by the receive frequency.

- For receiver A, the CTCSS status (N - none, E - encode, or B - both), the CTCSS index (00 - 46) and the transmit offset (S -simplex, P - plus, M - minus, or V - variable) follows the frequency. The transmit frequency is reported last for receiver A (variable offset) and sat (uplink) channels. A valid variable offset transmit frequency must be sepcified even if the offset is not ‘V’, for the “LCA” command.

- For receiver B, the CTCSS status (N - none or D - decode) and CTCSS index follow the frequency.

The priority channels specifiy mode (V or D) and frequency.

-Receiver A also requires CTCSS status (N, E, or B), CTCSS index, and transmit offset (S, P, or M).

The report for the “EF” command shows either the active VFO, memory channel, or priority channel report. The VFO report includes the receiver (A or B), the current VFO (1 or 2), (‘=’), the mode (V, D, S, or W), the frequency, CTCSS status, and CTCSS index. Receiver A also shows the transmit offset (S, P, M, or V).

The “EL” and “EB” commands are provided for displaying the LCD (preferably graphically) on the host PC using software written by the user.

TO SAVE A REPORT

For example, using PROCOMM PLUSTM, the report can be saved as an ASCII file:

1) Enter the log filename (CR for default): REPORT.log

2) Open the log file.

3) Start entering the report commands as desired.

4) Close the log file, by pressing Alt, F1.

5) To edit any entries, using WordPerfect® for example, alter the report formats to be Write (Load) commands formats at each entry.

6) Load the (edited) file to the TR270 by pressing Page Up and then typing in the name of the file with the path. Press Enter to start the data loading.

-Receiver B requires the CTCSS status (N -none or Ddecode) and CTCSS index.

Data Operation / Fax Operation 41

DATA OPERATION

The TR270 FM Transceiver has been designed for superior performance with 1200 and 9600 BAUD Packet Radio data rates in addition to its quality FM voice operation.

The optional TNC270 is a single, plug-in Terminal Node Controller module for the TR270 which contains both 1200 and 9600 BAUD modems. The module also contains on-board, battery backed static RAM for Mailbox messages. When installed, it offers a turn-key packet station for both terrestrial and satellite modes of operation. In addition to the hardware, the TNC270 is supplied with two software packages: PC PAKRATT for MSDOSTM, and PC PAKRATT for Microsoft WindowsTM. These programs are designed to fully exploit the entire TNC270 command set under either operating system.

The features include:

- AX.25 Level 1 & 2, 1200/9600 BAUD Packet operation in Command, Host, and KISS modes

- 18 KB Mailbox

- Node operation

- Hardware state machine for “true DCD” open squelch operation

- Hardware HDLC controller guarantees accurate protocol conversion at 9600 BAUD

- Modem disconnect header for installing other modems

- Separate 1200/9600 BAUD transmit level controls

- Enhanced MHEARD function identifies TCP/IP, NET/ ROM, and <THE-NET> stations

- Expert command included to ease the learning process - only the most common commands will be used until the EXPERT mode is enabled.

- Independent Operation: once installed and configured, the TNC270 will independently accept connects, receive and forward mail, and act as a node while the TR270 remains powered on.

FAX OPERATION

The optional DEMOD270 Multimode Demodulator, when installed in the TR270 FM TRansceiver, allows both AM and FM demodulation of various data transmissions. The DEMOD270 is user installable and includes a complete suite of PC based software. The features are as follows:

1) Decodes the following data transmissions in the FM mode:

- HF radio facsimile

- Morse Code

- RTTY (Radio Teletype)

- FEC/NAVTEX

- ACARS (Aircraft Communications and Reporting

System)

2) Decodes the following data transmissions in the AM mode:

- NOAA APT Weather Satellite

- GOES WEFAX (If used with an external 1691 MHz to

137.5 MHz converter)

Please refer to the Installation/Operating Manual that is included with the DEMOD270 for complete installation and operating instructions.

- Book for FAX software.

- Book for ACARS software.

Please refer to the Installation/Operating manual provided with the TNC270 for complete installation and operating instructions.

- Book for WindowsTM software. (The DOS software is explained in a Read Me file on the supplied diskette).

42 Suggested References

1) The ARRL Antenna Book Published by: The American Radio Relay League 225 Main Street Newington, CT 06111 U.S.A. Copyright © 1988 by The American Radio Relay League Library of Congress Catalog Card Number: 55-8966

2) The ARRL Handbook Published by: The American Radio Relay League 225 Main Street Newington, CT 06111 U.S.A. Copyright © 1989 by The American Radio Relay League Library of Congress Catalog Card Number: 41-3345

4) AMSAT 850 Sligo Avenue Suite 600 Silver Spring, MD 20910 U.S.A.

Glossary of Terms 43

1) AMSAT - Amateur Satellite Corporation which designs, builds and coordinates the launching of amateur communication satellites.

2) AOS - Acquisition of signal.

3) ack - Acknowledge - Sending data to confirm the

receipt of other data that was initially sent.

4) AC Input - Alternating current power source available at wall outlet sockets.

5) AGC - Automatic Gain Control which is employed in receivers to adjust the amount of gain in the receiver’s circuitry to prevent distortion and maintain a nearly constant audio volume level over wide variations in received signal strength.

6) Bird - Satellite.

7) Call - Call sign which identifies a particular amateur

radio operator.

8) Ctrl - Control character sent from personal computer or terminal keyboard.

9) DCD - Data Carrier Detect

10) DC Input - Direct Current power source such as is

available from batteries or regulated power supplies. Lead acid storage batteries, such as employed in cars and boats, have a 12-14 volt DC output which is the proper operating voltage for the transceiver’s DC input. Another requirement of the battery is its AMP-HR rating. To determine the number of hours of operation before battery recharging is required, divide the AMP-HR rating of the battery by (2 AMPS) the current requirement of the transceiver (assuming a duty cycle of 1 minute transmit at 6 Amps and 4 minutes receive at 1 Amp).

11) Downlink - The frequency from a satellite to a ground station.

12) Esc - Escape character sent from personal computer or terminal keyboard.

13) Frequency - Rate of reoccurrence in Hertz or cycles/ second of an electromagnetic wave or carrier.

17) LCD -Liquid-Crystal Display - composed of two parallel glass plates with conductive coatings sandwiching a liquid-crystal compound between them. The compound becomes opaque and reflective when subjected to an electric field. LCD displays are used as information displays on many types of electronic equipment.

18) LOS - Loss of signal.

19) mS - millisecond, 1/1000 of a second.

20) PACSAT - Packet (data) satellite.

21) PC - Personal computer.

22) PTT - Push to talk, refers to the push operated switch

on a microphone attached to a transmitter.

23) RF - Radio frequency.

24) RS-232C - Electronics Industries Association standard

physical-level interface between DTE (terminal) and DCE (modem).

25) RTTY - Radio Teletype communications.

26) Squelch - A user controlled adjustment which mutes

the audio output for received signals that are below a certain strength.

27) Synthesized - Capable of generating a large number of different output frequencies, all related to a single, highly stable reference source.

28) TNC - Terminal Node Controller, used for the transmission and reception of packet data through a communications link.

29) UHF - Ultra High Frequency band extends from approximately 300 MHz to 3000 MHz.

30) VFO - Variable Frequency Oscillator.

31) VHF - Very High Frequency band extends from

approximately 30 MHz to 300 MHz.

14) FM - Frequency Modulated signals, in which the information or intelligence being transmitted, changes the instantaneous frequency of the transmitter carrier. Not to be confused with the FM Broadcast Band (FM frequencies of 88 to 108 MHz).

15) FSK - Frequency Shift Keying is a method of encoding a signal by using constant-amplitude radio frequency pulses having different frequencies, one frequency for each of the possible message symbols.

16) LF - Line feed control character sent to start a new line of message or printing.

44 Notes

_______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________

Most front panel pushbuttons perform two functions. The second function requires that the

button be

*

NUM

pressed first, and then the desired second function button pressed within three seconds. The symbol

3

indicates that the button is to be pressed within three seconds.

Enter SETUP (page 14) ---------------------------------------------------

Quick Reference Guide 45

D

SETUP

Press and hold

.

Assign antenna inputs (page 16) -----------------------------------

Select Transceiver ‘A’ or Receiver ‘B’ (page 7) -----------------------------------------------

Select VFO (page 7) -----------------------------------------------------

Adjust Frequency (pages 6, 7, 13) ----------------------------------

Set tuning wheel step size (pages 13, 15) ------------------------

Select Mode (page 7) --------------------------------------------------

Select Priority (page 7) -------------------------------------------------

Set Priority Channel Action (page 14) ----------------------------

Press and hold

D

. Rotate tuning wheel to #15. Press

SETUP

/ to set 0, 1, 2, or 3.

A

Press

Turn tuning wheel, Press

3

‘A’: Press and hold Press ‘B’: Press and hold

.

A / B

2

.

VFO

/ buttons, or Press

numeric buttons.

D

. Rotate tuning wheel to #04.

SETUP

/ to set 5, 10, 15, 20 or 25 kHz.

D

. Rotate tuning wheel to #05.

SETUP

Press / to set 5, 10, 12.5, 15, 20, or 25 kHz.

B

‘A’: Press ‘B’: Press

1

Press

PRIO

Press and hold

to select VOICE, DATA, or Standby.

MODE

B

to select VOICE, DATA, WXSAT, or Standby.

MODE

for selected receiver frequency to be priority.

1

to initiate priority watch (PW lights).

PRIO

D

. Rotate tuning wheel to #02. Press

SETUP

/ to set 0 or 1.

*

NUM

Set transmit power (page 18) ----------------------------------------

Select relative transmit power (page 7) --------------------------

Set time-out-timer for transmit (page 16) ------------------------

Select IF Bandwidth for Receiver ‘B’ (page 7) -----------------

Lock (Unlock) Controls (page 7) ------------------------------------

Set LCD backlight intensity (page 19) -----------------------------

Set Audible Beep On or Off (page 16) ---------------------------

Set Transmit Microphone audio filter On or Off (page 19) -

Press and hold

D

. Rotate tuning wheel to #50 (Low),

SETUP

#51 (Medium), or #52 (High). Press / to set level.

C

P. OUT

.

D

. Rotate tuning wheel to #14. Press

SETUP

Press

Press and hold

/ to set 0 (no time out), 1, 2, 3, or 10 minutes.

9

‘B’ only: Press

0

Press

for selected transceiver ‘A’ / receiver ‘B’.

LOCK

Press and hold Press

/ to set intensity.

Press and hold

.

B BW

D

. Rotate tuning wheel to #56.

SETUP

D

. Rotate tuning wheel to #12. Press

SETUP

/ to set 1 (beep on) or 0 (beep off).

Press and hold

D

. Rotate tuning wheel to #58. Press

SETUP

/ to set 1 (filter on) or 0 (filter off).

46 Quick Reference Guide, continued

STORE

#

3

MEM

SETUP

D

SETUP

D

SETUP

D

MEMORY FUNCTIONS

With a desired frequency displayed,

Storing to VFO (page 20) ---------------------------------------------Programming Priority Channel (page 20) -----------------------Memory Channel Programming (pages 20, 21) ---------------

Press Press

Press indication. Enter a 2-digit number.

#

STORE

3

to store into VFO, or

2

VFO

1

3

to store into priority, or

PRIO

3

for a flashing memory number

Recalling a Memory Channel (page 20) ------------------------

Changing a Memory Channel (page 20) -----------------------

Construct a Memory List (page 20) --------------------------------

Locking a Memory Channel (page 21) ---------------------------

Restore Factory Memory Programming (page 21) -----------

Restore Factory Setup Settings (page 21) -----------------------

From the VFO or Priority mode, Press

3

,

. Enter 2-

*

MEM

NUM

digit memory number. In the memory mode, rotate tuning wheel or Press

/ for selection.

Store a new channel to old location (erases original information).

Press and hold

.

‘A’: Rotate tuning wheel to SETUP #30 (through 39). Press

/ for 0-9 index within a list. Enter a 2-digit memory

channel number at each desired index. Advance the index, enter the next 2-digit memory channel number until list is complete. Advance to next Setup number (rotate wheel) if additional lists are to be programmed. ‘B’: Same as ‘A’, except use SETUPs #40-49.

With the desired memory number displayed, Press

0

LOCK

(lock ' ' symbol lights).

With power off, Press and hold

3

while turning the TR270

MEM

power switch on.

With power off, Press and hold

D

SETUP

.

SCAN FUNCTIONS

Program the Scan (Stop) method (pages 16, 22 - 26) -------

- Stop scan at first detected carrier; exit scan -----------------

- Stop scan at detected carrier; resume (5) seconds after carrier drops. ---------------------------------------------------------------

- Stop scan at detected carrier; wait (5) seconds; resume scan. --------------------------------------------------------------------------

- Stop scan at detected carrier; resume scan immediately after carrier drops. -------------------------------------------------------

Scan Memory (pages 16, 22 - 26) -----------------------------------

Program to scan ALL memory channels -------------------------

Program to scan a RANGE memory channels -----------------

Press and hold

. Rotate tuning wheel to SETUP #16, 17,

18, or 19 as required. Press / to set for ‘0’, or

Press

Press and hold

/ to set for ‘1’, or

/ to set for ‘2’, or

/ to set for ‘3’.

.

‘A’: Rotate tuning wheel to #24. Press / to set ‘0’. ‘B’: Rotate tuning wheel to #27. Press ‘A’: Rotate tuning wheel to #24. Press

/ to set ‘0’.

/ to set ‘1’.

Rotate tuning wheel to #25. Enter 2-digit start number. Rotate tuning wheel to #26. Enter 2-digit stop number.

‘B’: Rotate tuning wheel to #27. Press

/ to set ‘1’.

Rotate tuning wheel to #28. Enter 2-digit start number. Rotate tuning wheel to #29. Enter 2-digit stop number.

Quick Reference Guide, continued 47

3

MEM

Program to scan a List of Memory Channels (pages 24, 25)

Program to scan VFO (pages 16, 17, 25, 26) --------------------

Start Scan (pages 7, 23-26) -------------------------------------------

Stop Scan (pages 7, 23-26) -------------------------------------------

‘A’: Rotate tuning wheel to #24. Press

/ to set ‘2’.

(construct List in SETUPs #30-39, if necessary) Exit SETUP.

3

Press and hold

for flashing prompt. Enter desired

MEM

list number, 0 - 9 (as programmed in SETUPs #30-39). ‘B’: Rotate tuning wheel to #27. Press / to set ‘2’.

(construct List in SETUPs #40-49, if necessary) Exit SETUP.

3

Press and hold

for flashing prompt. Enter desired

MEM

list number, 0 - 9 (as programmed in SETUPs #40-49).

Press and hold

D

SETUP

.

‘A’: Rotate tuning wheel to #20. Enter the START frequency endpoint (144 - 148 MHz). Rotate tuning wheel to #21. Enter the STOP frequency endpoint (144 - 148 MHz).

‘B’: Rotate tuning wheel to #22. Enter the START frequency endpoint (136 - 174 MHz, 420 - 470 MHz). Rotate tuning wheel to #23. Enter the STOP frequency endpoint (136 - 174 MHz, 420 - 470 MHz).

Set the squelch control to quiet the receiver. Press and hold either

During scan, press

2

or

VFO

, as desired, to start the scan.

2

1

,

PRIO

3

or

VFO

. For transceiver ‘A’

MEM

only, keying PTT also stops the scan.

OPERATION WITH REPEATERS

Set Repeater Offsets (pages 27, 28) -------------------------------

CONFIGURE UNIT TO OPERATE AS A REPEATER (pages 16, 29, 30)

Set for Normal or Repeater Mode (page 16) -------------------

Set repeater mode highpass audio filter On or Off (pages 19, 30) --------------------------------------------------------------

SUBAUDIBLE TONE

Set Transceiver ‘A’ subaudible tone filter On or Off (pages 19, 28) -------------------------------------------------------------

Set Receiver ‘B’ subaudible tone filter On or Off (pages 19, 28, 30) --------------------------------------------------------

Program Subaudible Tone Frequency (pages 28, 30) ------

4

Press

Press and hold

, to select ‘+’ , ‘-’, or Simplex.

RPT

D

. Rotate tuning wheel to SETUP #13.

SETUP

Press / to set ‘0’(normal) or ‘1’(repeater).

Press and hold

D

. Rotate tuning wheel to SETUP #57.

SETUP

Press / to set ‘0’ (filter off) or ‘1’ (filter on).

Press and hold

D

. Rotate tuning wheel to SETUP #59.

SETUP

Press / to set ‘0’ (filter off) or ‘1’ (filter on).

Press and hold Press

/ to set ‘0’ (filter off) or ‘1’ (filter on).

‘A’: Press

D

. Rotate tuning wheel to SETUP #60.

SETUP

8

3

CTS

rotate tuning wheel or press / to

set desired tone frequency.

8

3

‘B’: Press

CTS

rotate tuning wheel or press / to

set desired tone frequency (or ‘OFF’ for no tone).

48 Quick Reference Guide, continued

Enable/Disable Tone (page 7) --------------------------------------

DTMF Dialing

Use DTMF tones (page 28) --------------------------------------------

To Store a Phone Number (page 29) ------------------------------

‘A’: Press frequency. Press

on transmit or receive as required.

‘B’: Press frequency. Press

disable (‘OFF’) the tone decoding as required.

Press push-to-talk on microphone. Press 0-9, A-D, *,# as required to dial the phone number.

Press Enter the phone number. Press to store the number.

8

once to display current CTCSS tone

CTS

8

a second, third and fourth time

CTS

3

7

DTMF

8

press

8

CTS

8

CTS

to select ‘ENC’, ‘DEC/ENC’, or no tone

CTS

once to display current CTCSS tone

a second and third time to enable or

3

Press 0-9 to select a memory location.

To Dial a Phone Number from Memory (page 29) -----------

7

DTMF

3

press 0-9 to select desired memory

Press location. Press PTT to transmit DTMF tones.

-OR-

7

DTMF

3

press PTT to transmit. Press 0-9 to select

Press desired memory location (DTMF tones will be transmit-

ted).

Notes 49

_______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________

50 Notes

_______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________

Notes 51

_______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________

52 Service

SERVICE INFORMATION

You may contact R. L. DRAKE Service Department for additional information or assistance by calling (513) 746-6990, Monday through Friday, 8:00 A.M. - 5:00 P.M. EST, except on holidays.

You may also contact the R. L. DRAKE Service Department by E-mail at the following address: service@rldrake.com or by Telefax: +1 (513) 743-4576.

IF YOU NEED TO CALL FOR HELP

Call our Customer Service/Technical Support line at (513) 746-6990 between 8:00 a.m. and 5:00 p.m. EST, weekdays. Please have the unit’s serial number available. We will also need to know the specifics of any other equipment connected to the unit. When calling, please have the unit up and running, near the phone if possible. Our technician(s) will likely ask certain questions to aid in diagnosis of the problem. Also, have a voltmeter handy, if possible.

R. L. DRAKE also provides technical assistance by e-mail: bill_frost@rldrake.com or by Telefax: +1 (513)-743-4576.

Should you want to return your unit for service, package the transceiver carefully using the original carton or other suitable container.

Write your return address clearly on the shipping carton and on an enclosed cover letter describing the service required, symptoms or problems. Also include your daytime telephone number and a copy of your proof of purchase.

The transceiver will be serviced under the terms of the R. L. DRAKE Company Limited Warranty and returned to you.

Red is an overnight service and is expensive. Send the unit in a way that it can be traced if we can’t verify receipt of shipment. We suggest UPS or insured postal shipment.

If the unit is still under the original owner’s warranty, R. L. DRAKE will pay the cost of the return shipment to you. Our return shipping policy is that we will return it UPS Brown if received Brown or by US Mail, it will be returned Blue if received Blue or Red—or it will be returned however you prefer if you furnish the return cost for the method you select. If the unit is out of warranty, it will be returned by UPS Brown label COD unless:

Many of the products that are sent to us for repair are in perfect working order when we receive them. For these units, there is a standard checkout fee that you will be charged. Please perform whatever steps are applicable from the installation sections of the Owner's Manual before calling or writing—this could save unnecessary phone charges. Please do not return the unit without contacting R. L. DRAKE first: it is preferred to help troubleshoot the problem over the phone (or by mail) first, saving you both time and money.

Inside the carton, enclose a note with your name, address, daytime phone number, and a description of the unit’s problem. The unit must be sent to the following address:

Service Department R. L. DRAKE COMPANY 230 Industrial Drive Franklin, Ohio 45005 U.S.A.

Be sure to include your street address which will be needed for UPS return. UPS Surface (Brown Label) takes 7-10 days to reach us depending on your location, Blue takes 2-3 days.

1) It was received UPS Blue/Red, in which case it will be returned UPS Blue/Red COD;

2) You designate billing to American ExPress, VISA, MasterCard or Discover card;

3) You prepay the service charges with a personal check, or

4) You specify some other method of return. When calling, the technician can estimate the repair

charges for you over the phone. This is another good reason to call before sending a unit in for repair. Typically, equipment is repaired in five to ten working days after it arrives at R. L. DRAKE if we have all the facts. If we must call you, it may take longer. R. L. DRAKE is not responsible for damage caused by lightning, nonprofessional alterations, “acts of God”, shipping damage, poor storage/handling, etc. R. L. DRAKE will make note of any shipping damage upon receipt. Should your warranty card not be on file at R. L. DRAKE, you will need to send proof of purchase to receive warranty service. Typically, a copy of the invoice from an R. L. DRAKE dealer will suffice. The warranty is for the original owner only and is not transferable.

Warranty 53

One Year Limited Warranty

R.L.DRAKE COMPANY warrants to the original purchaser this product shall be free from defects in material or workmanship for one (1) year from the date of original purchase.

During the warranty period the R.L.DRAKE COMPANY or an authorized Drake service facility will provide, free of charge, both parts and labor necessary to correct defects in material and workmanship. At its option, R. L. Drake Company may replace a defective unit.

To obtain such warranty service, the original purchaser must:

(1) Complete and send in the Warranty Registration Card within 10 days of purchase. (2) Notify the R.L.DRAKE COMPANY or the nearest authorized service facility, as soon as possible after discovery

of a possible defect, of: (a) the model and serial number, (b) the identity of the seller and the approximate date of purchase; and (c) A detailed description of the problem, including details on the electrical connection to associated equipment and the list of such equipment.

(3) Deliver the product to the R.L.DRAKE COMPANY or the nearest authorized service facility, or ship the same in its original container or equivalent, fully insured and shipping charges prepaid.

Correct maintenance, repair, and use are important to obtain proper performance from this product. Therefore carefully read the Instruction Manual. This warranty does not apply to any defect that R.L.DRAKE COMPANY determines is due to:

(1) Improper maintenance or repair, including the installation of parts or accessories that do not conform to the quality and specifications of the original parts.

(2) Misuse, abuse, neglect or improper installation. (3) Accidental or intentional damage.

All implied warranties, if any, including warranties of merchantability and fitness for a particular purpose, terminate one (1) year from the date of the original purchase.

The foregoing constitutes R.L.DRAKE COMPANY’S entire obligation with respect to this product, and the original purchaser shall have no other remedy and no claim for incidental or consequential damages, losses or expenses. Some states do not allow limitations on how long an implied warranty lasts or do not allow the exclusions or limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you.

This warranty gives you specific legal right and you may also have other rights which vary from state to state. This warranty shall be construed under the laws of Ohio.

For service information contact:

Service Department R.L. DRAKE COMPANY 230 Industrial Drive Franklin, Ohio 45005 U.S.A.

Customer Service Center Phone: +1 (513) 746-6990 TELEFAX: +1 (513) 743-4576

WORLD WIDE WEB SITE: http://www.rldrake.com

®

R.L. DRAKE COMPANY

230 INDUSTRIAL DRIVE

FRANKLIN, OHIO 45005 U. S .A.

CUSTOMER SERVICE AND PARTS TELEPHONE:

+1 (513) 746-6990

TELEFAX:

+1 (513) 743-4576

WORLD WIDE WEB SITE:

http://www.rldrake.com

DRAKE TR-270 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual