Technisonic TFM 500 Airborne Transceiver Installation and Operating Instructions

VHF/UHF FM

AIRBORNE TRANSCEIVER

MODEL TFM-500

(P/N’s 971083-1,3 -VHF Guard Module)

Installation and

Operating Instructions

Til Document No.

98RE243

Rev. N/C

Issue 7

August 2002

Technisonic Industries Limited

240 Traders Boulevard, Mississauga, Ontario L4Z 1W7

Tel:(905)890-2113 Fax:(905)890-5338 www.til.ca

CAUTION

This unit contains static sensitive devices. Wear a grounded wrist strap and/or conductive gloves when handling printed circuit boards.

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communcations. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

Warning:

Changes or modifications not expressly approved by Technisonic Industries could void the user’s authority to operate the equipment.

WARRANTY INFORMATION

The Model TFM-500, Transceiver is under warranty for one year from date of purchase. Failed units caused by defective parts, or workmanship should be returned to:

Technisonic Industries Limited

240 Traders Boulevard

Mississauga,

Ontario L4Z 1W7

Tel: (905) 890-2113 Fax: (905) 890-5338

A Page

Summary of DO-160C Environmental Testing for Technisonic Model TFM-500, VHF and UHF

Transceiver:

Conditions

Temperature and Altitude

Vibration

Magnetic Effect

Power Input

Voltage Spike

RF Emission

Section

4.0

8.0

15.0

16.0

17.0

21.0

Description of Conducted Tests

Equipment tested to categories B2 and

D1.

Equipment is tested without shock mounts to categories B, M and N.

Equipment is class A.

Equipment tested to category B.

Equipment tested to category B.

Equipment tested to category Z.

Installation Approval Note

Presently no TSO standard exists for airborne FM transceivers. To make it easier for installation agencies to provide their customers with an approved installation supported by an effective

Airworthiness Approval, Technisonic has secured Supplemental Type Certificate (STC) Approvals (both

US and Canadian) on its Airborne FM products for many helicopters currently being delivered in the

US and Canada as well as a number of single engine fixed wing aircraft. The above referenced DO-

160C test data is also on file and available from Technisonic to support approval requirements in airframes for which Technisonic does not possess an STC.

Approved aircraft types are listed in the attachments to the formal STC documents. These STC's are the exclusive property of Technisonic and require the written authority of Technisonic for their use.

To assist Factory Authorized Technisonic Dealers in the certification process, we have placed copies of our Canadian and US STC's on our web site along with a letter of authorization for their use. These documents may be downloaded and used as support for the technical submission to FAA or Transport

Canada. Only factory authorized dealers/installers are permitted to download and make use of these documents on behalf of their customers (end users) in support of regulatory agency approval. Please refer to the Technisonic web site www.til.ca

for the latest issue of available STC’s and letter of authorization for use.

B page

Paragraph

SECTION 1

1.1

1.2

1.3

1.4

1.5

SECTION 2

2.9

2.10

2.11

2.12

2.13

2.14

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

SECTION 3

3.8

3.9

3.10

3.11

3.12

3.13

3.7.2

3.7.3

3.7.4

3.7.5

3.7.6

3.7.7

3.7.8

3.7.9

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.7.1

TABLE OF CONTENTS

Title

GENERAL DESCRIPTION

Page

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Purpose of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Model Variation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Technical Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

OPERATING INSTRUCTIONS

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Programming Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Priority and Selective Memory Channel Scanning . . . . . . . . . . . . . . . . . . . . . 2-4

Scanning Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Direct Frequency Entry Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Receive Frequency Simplex Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Keyboard Lockout Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Variable Frequency Mode Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

LED Display Variable Dimming Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

90 Second Transmitter Time Out Feature . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Quick Guard Programming Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Programming CTCSS Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

PC Memory/Programming Download Capability . . . . . . . . . . . . . . . . . . . . . . . 2-8

INSTALLATION INSTRUCTIONS

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Equipment Packing Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Transceiver Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Installation Kit - Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Antenna Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Installation - Pin Locations and Connections . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Wiring Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Main Power +28VDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Main Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

PTT (Ground Keying) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Front Panel Back Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Audio Outputs (600 and 4 Ohms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Audio Output Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Mic Signal Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Memory Up/Memory Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Data Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Internal Programming and Guard Enable/Disable Jumper . . . . . . . . . . . . . . . . 3-5

Transmitter Power Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Transmitter Microphone Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Main and Guard Squelch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Transmitter Deviation Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Guard Receiver Audio Limit Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 i

Table No.

3-1

LIST OF TABLES

Title Page

9-pin D and 15-Pin D Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

LIST OF ILLUSTRATIONS

Figure No.

2-1

2-2

3-1

3-2

3-3

3-4

3-5

3-6

Title Page

Operator's Switches and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

PC Up/Download Cable - Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Interal Enable/Disable Jumper Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

External Adjustment Access Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

VHF Deviation Adjustment Potentiometer Location . . . . . . . . . . . . . . . . . . . 3-10

UHF Deviation Adjustment Potentiometer Location . . . . . . . . . . . . . . . . . . . 3-10 ii

SECTION 1

GENERAL DESCRIPTION

1.1 INTRODUCTION

This publication provides operating and installation information on the TFM-500 Transceiver.

manufactured by Technisonic Industries Limited. The unit offers an extended frequency range with selectable channel spacing and is intended for use (in the U.S.) only by government agencies or contractors thereto, who have obtained licensing for operation in the 138-150 MHz portion of the band. If the TFM-500 transceiver is used in CANADA, VHF operation is restricted to the following sub bands: 138-144, 148-148.99, 149.005-150.005 and 150.05-

174 MHz.

1.2

1.3

DESCRIPTION

The TFM-500, Transceiver is a frequency agile, fully synthesized airborne transceiver capable of operating in the 138 to 174 MHz and 403 to 512 MHz frequency range in 2.5 kHz increments with either 25 kHz or 12.5 kHz channel spacing. The Transceiver can operate without restriction on any split frequency pair in either band and also incorporates a two channel VHF synthesized guard receiver.

The TFM-500 Transceiver provides 200 operator accessible memory positions per band, each of which is capable of storing a transmit frequency, receive frequency, transmit frequency

CTCSS tone or DPL code, receive frequency CTCSS tone or DPL code, an alphanumeric identifier for each channel and wideband (25 kHz) or narrowband (12.5 kHz) channel spacing assignment. Operating frequency and other related data are presented on a 96 character, four line LED matrix display. Data entry and function control are performed via a 12 button keypad.

Preset channels may also be scrolled and scanned through keypad function activation. Data may also be entered via a Windows 95/98/NT/2000/ME based computer with the provided software and optional PC Up/download cable, P/N 993390-1.

PURPOSE OF EQUIPMENT

1.4

The TFM-500, VHF/UHF FM Transceiver is designed to provide secondary airborne communications to facilitate operations which are typically performed in a low altitude environment. The transmitter sections of this unit have a minimum of 8 watts and do not exceed 10 watts output power, which may be reduced by a front panel switch to 1 watt, in order to reduce interference to land based systems.

MODEL VARIATION

There are four variations of the Model TFM-500 Transceiver. All units offer identical features and performance except for the following differences:

TFM-500, P/N 971083-1

TFM-500, P/N 971083-1 (5V),

TFM-500, P/N 971083-3

TFM-500, P/N 971083-3 (5V),

GREEN display and 28 Volt back lighting.

GREEN display and 5 Volt back lighting.

RED display and 28 Volt back ligting.

RED display and 5 Volt back lighting.

Both P/N's 971083-1 and 971083-3 are always provided with 28 Volt back lighting unless a specific request is made for 5 Volt AC operation.

1-1

1.5

TECHNICAL CHARACTERISTICS

Specification

GENERAL

Model Designation:

Frequency Range:

Tuning Increments:

Operating Mode:

Channel Spacing:

Physical Dimensions (including heatsink):

Weight:

Mounting:

Operating Temperature Range:

Power Requirement:

Voltage:

Current:

Frequency Selection:

Guard Receiver:

CTCSS squelch/encoder:

DPL digital squelch/encoder:

DTMF encoder:

Audio Outputs:

Speaker Output:

Back Lighting:

Display Colour:

DPL is a trademark of Motorola Corporation

Characteristic

TFM-500

138 to 174 and 403 to 512 MHz

2.5 kHz

F3E simplex or semi-duplex

25 or 12.5 kHz

Approx. 8.0" X 3.0" X 5.75"

Approx. 5.1 Lbs (2.3 Kg)

Panel Mount via Dzus fastners

-40 E C to +60 E C

28.0 Vdc, ± 15%

Receive - 1.0 A Max.

1 Watt Transmit - 2.0 A Max.

8-10 Watt Transmit - 3.2 A Max.

8-10 Watt Dual Trans - 5 A Max.

200 memories per band programmed with: a) Tx Frequency/Rx Frequency b) Tx/Rx CTCSS tone or DPL code c) 9 character alpha numeric title

2 channels programmed with: a) Tx Frequency/Rx Frequency b) Tx CTCSS tone or DPL code c) 9 character alpha numeric title

All CTCSS tones available

All standard DPL codes

All standard DTMF tones

0.5 Watts into 600 ohms

2.5 Watts min. into 4 ohms

28 Volts (standard) or

5 Volts (specify)

Green (standard) or Red (specify)

1-2

1.5

TECHNICAL CHARACTERISTICS (continued)

VHF RECEIVER

Sensitivity at 12 dB SINAD

Adjacent Channel Selectivity

Spurious Attenuation

Third Order Intermodulation

Image Attenuation

FM Acceptance

Hum and Noise

Audio Distortion

Antenna Conducted Emission

UHF RECEIVER

Sensitivity at 12 dB SINAD

Adjacent Channel Selectivity

Spurious Attenuation

Third Order Intermodulation

Image Attenuation

FM Acceptance

Hum and Noise

Audio Distortion

Antenna Conducted Emission

GUARD RECEIVER

All specifications identical to VHF receiver

Better than 0.35 µV

-75 dB (25 kHz)

-70 dB (12.5 kHz)

-90 dB

-70 dB

-80 dB

± 6 kHz

Better than 45 dB less than 5% less than -70 dBm

Better than 0.35 µV

-70 dB (25 kHz)

-60 dB (12.5 kHz)

-80 dB

-70 dB

-60 dB

± 6 kHz

Better than 40 dB less than 5% less than -70 dBm

1-3

VHF and UHF TRANSMITTER

RF Power Output

Output Impedance

Maximum Deviation

(In narrowband mode)

Spurious Attenuation

Frequency Stability

Microphone Circuit

Sidetone Output

Harmonic Attenuation

FM Hum And Noise

Audio Input

Audio Distortion

1 watt or 10 watts

50 ohms

±5 kHz (25 kHz mode)

±2.5 kHz(12.5kHz mode)

-90 dB below carrier level

± 2.5 ppm

Carbon or equivalent

0.5W (max) into 600 S

-65 dB below carrier level

-40 dB

50 mV at 2.5 kHz into

200 S input circuit for

±3.5kHz deviation, adjst.

Less than 5%

1-4

2.1

SECTION 2

OPERATING INSTRUCTIONS

FEATURES

The equipment has several important operating features which provide maximum flexibility, performance and versatility. These features include:

1. VHF and UHF bands that can be configured to be operated independently or as a single unit.

2. The unit can be set up as a crossband repeater, linking a VHF and UHF frequency in both directions.

3. 200 memory positions per band which can each be programmed with a transmit and receive frequency with 25 or 12.5 kHz channel spacing, Tx/Rx CTCSS tones or DPL codes and a 9-character alphanumeric title.

4. 2 guard channels which can each be programmed with a Rx frequency with 25 or 12.5

kHz channel spacing, CTCSS Tx tone or DPL code and a 9-character alphanumeric title.

5. Scanning of preprogrammed memories with selective memory scanning, in 5 scan lists.

6. Priority scan of memory channel 1, if desired.

7. Direct frequency entry mode.

8. Receive frequency simplex function.

9. Switchable RF output power between 1 watt and 8-10 watts.

10. Lockout of keyboard to prevent inadvertent entries.

11. Variable frequency mode to manually scan up and down in 2.5 kHz steps.

12. LED display variable dimming mode.

13. Selectable 90 second Tx time out feature.

14. Quick download of any of the VHF memory positions to the guard memories.

15. PC Memory Upload or Download capability.

16.

Configuration Menu - Pressing ENTER , RCL and FUNC together while turning the radio

on will put it into configuration mode.The programming features

affected are: a) DPL - Can be turned on or off with th MUP and MDN (4 and 7) keys. This only removes the DPL entry step from the programming sequence and does not stop memories that already have DPL codes from working. This also applies to the rest of the on/off configurable items.

b) Scan - Can be disabled. Selecting FUNC and SCAN will do nothing if Scan is off. The scan list indicator (+) will still display if was previously programmed.

c) Rx CTCSS - Can be turned on or off from the programming sequence. This affects only the CTCSS tones for receive.

d) FUNC 7 - Can be turned on or off. When off, the main memory channel can not be dumped into one of the guard channels using function 7.

e) LAST MEM - If set to on, the last memory channel on the display will be what comes up when the radio is turned on. If set to off, the last memory that changes were made to will be what comes up when the unit is switched on.

f) DUALMODE - If set to on, the UHF and VHF bands are operated independently and simultaneously. The radio is shipped with this feature OFF.

2-1

g) SIDETONE - The TX audio circuit becomes active allowing you to adjust the sidetone level with the VHF volume knob. When thedesired level is reached, press

ENTER and this level will be set for both VHF and UHF bands. The factory setting is 23.

Note: You must set the side tone every time you go through the configuration menu since the position of the knob is taken as the new level regardless of whether or not you made an adjustment.

FIGURE 2-1 Operator's Switches and Controls

2-2

2.2

2.3

OPERATING INSTRUCTIONS (See Figure 2-1)

1. Switch power on by turning the main volume clockwise. Depending how the radio is configured, either the last programmed or last displayed frequencies will appear on the screen. The transceiver is now in normal operating mode.

2. Adjust the audio level by adjusting the VHF, UHF and GUARD volume knobs.

3. Pressing the squelch defeat button will open all receivers to confirm they work.

4. Read the display. The top line will indicate which VHF memory is selected followed by a

"+" if the memory position is included in a scan list, an alphanumeric message, and the frequency of the VHF receiver. A small "n" before the frequency indicates 12.5 kHz narrowband channel spacing is in effect on this memory position. In the receive mode, the frequency is followed by an "RT" if a RX CTCSS tone or RX DPL code is programmed, or an "RX" if no Receive tone/code is programmed. Similarily, in the transmit mode either a

"TT" or "TX" is shown after the frequency. The second line shows the same information for the UHF band. The third line indicates information about the guard receiver.

5. Only TX CTCSS tones or TX DPL codes may be programmed for the guard receiver.

At the beginning of each line, an LED indicates open squelch.

6. Set the VHF/UHF/GD switch to the desired band.

7. Set the G1/G2 switch to the desired guard channel.

8. Set the HI/LO switch to the desired RF output power.

9. Select the desired memory by using the M.UP and M.DN buttons, or the RCL button and a three digit number followed by ENTER.

10. To transmit DTMF tones, use the keyboard keys while holding the PTT button on the microphone. There is a 5 second PTT delay after pressing a key so that you may press several DTMF keys in sequence without having to hold the PTT. The keyboard returns to its normal function when the PTT is released.

The display always shows the status of both receivers and the transmitter. The light at the left of each line indicates which receiver is receiving. The display also indicates the memory channel in use and the guard channel in use. A "TX" (no TX tone/codes programmed) or

"TT"(either TX tone or code programmed) on the right side of the display indicates which band is active when transmitting. The transmit frequency is also shown. In the receive mode the display shows “RX” beside the receive frequency if no RX tone or DPL code is programmed and “RT” if a CTCSS tone or DPL code is programmed.

While in any programming mode, all receivers continue to function.

When the transceiver is in either of the operating frequency or CTCSS tone/DPL code programming modes and you must respond to a call, click the microphone PTT once (the radio will not transmit during this click). This will cause the transceiver to revert back to the normal operating mode and communications with the caller can proceed in the usual fashion.

PROGRAMMING INSTRUCTIONS

To program one of the 200 memory channels in one of the bands:

1. Select the desired band on the band select (VHF/UHF/GD) switch. This is required before any of the programming modes or functions.

2-3

2. Press the FUNC key. The display will show the function prompt.

3. Press the PROG key. The display will show the current receive frequency with a flashing curser on the first or second digit (The first digit is always a one <1> on the VHF band).

4. Type in the desired receive frequency. If you type in a frequency which is not a 2.5 kHz step, the nearest valid frequency will be automatically selected.

5. The curser will return to the second digit. You can retype the frequency if you have made an error or press ENTER to continue.

6. The transmit frequency will be displayed with the curser on the second digit. Follow the same method as in step 3 and 4.

7. The channel spacing increment of either 25.0 or 12.5 kHz is now displayed. Use the

M.UP

and M.DN

keys to select the desired channel spacing for the memory position, then press ENTER .

8. The alpha-numeric title is now displayed. Use the M.UP

and M.DN

keys to scroll through the alphabet, numbers and symbols. When the desired character is displayed, press ENTER to advance to the next character. Press “1" to backspace.

9. Keep repeating step six until the last space is set. The display will show SCAN or

LOCKOUT to enable this memory position as part of a scan list or lock it out of the scan list. Use the 1,2,3,4,5 and M.DN

keys to toggle between these functions (for details see paragraph 2.5). Once the desired condition has been selected, press ENTER .

The TFM-500’s display will show a "+" beside the memory channel number if scan is enabled.

10. The display will now show the current memory number. Type in the 3-digit number of the memory you want to save to (if different from displayed one) and press ENTER .

11. You now have the option to program the guard frequencies by pressing FUNC or press

ENTER to return to normal operating mode.

12. If you pressed FUNC to program the guards, guard"1" transmit frequency will be displayed with the flashing curser on the second digit. Enter the frequencies for guard"1" receive/transmit and guard"2" receive/transmit as in step 3 and 4.

13. The alphanumeric labels for guard"1" and guard"2" are entered the same as in step 7 and 8. When the last character is entered, the radio returns to normal operating mode.

2.4

PRIORITY SCANNING, SELECTIVE MEMORY CHANNEL SCANNING AND SCAN LISTS

Instead of breaking up the 200 channels into blocks for scanning, the TFM-500 has 5 scan lists per band. Any of the 200 channels can be assigned to any one or more of these 5 scan lists. This means the channels do not have to be repeated for them to be in more than one block and that you are not limited to the number of channels that you can scan at once.

The priority memory channel is always memory position number 1. The priority memory channel is scanned every other step (ie. 121314151...) to ensure that no incoming messages are missed. The priority channel can be locked out, which will result in the normal scanning of the other memory positions.

2-4

2.5

2.6

2.7

Selective memory scanning allows the user to select which of the 200 memory channels are to be scanned or locked out when the scan function is invoked. To use this feature, follow the PROGRAMMING INSTRUCTIONS found in paragraph 2.3. Once the screen displays SCAN or LOCKOUT , use the 1,2,3,4,5 or M.DN

keys to toggle to the desired condition. The MDN button acts as a clear while pressing one or more of the above numbers adds the memory to the corresponding scan list or lists. Press ENTER when you are happy with your selection. In normal operating mode the display will later show a "+" beside the memory channel number if it has been included in any of the 5 scan lists.

NOTE: Scanning can only be performed on one band (either VHF or UHF) at a time.

When the transceiver is in the single mode (combined VHF and UHF audio) and the scan feature has been invoked on one band, it will be interrupted when transmitting on the other band. In the Dual mode, you are able to transmit on the second band without effecting the scan function on the first.

SCANNING FUNCTION (5 second talkback delay)

Select the band you wish to scan with the band switch. (you can not scan the guard)

To start scanning of the memory channels, press FUNC then SCAN and then the number

(1,2,3,4,5) of the desired scan list.

The radio will scan through all the preset memory positions in the selected scan list (see above paragraph for priority and selective scan features) and will lock on to the first active channel in the scan sequence. It will remain on the channel until it becomes inactive. Scanning will resume again after five seconds of inactivity. To exit the scan mode, press the SCAN key. This will cause the radio to revert back to the normal operating mode.

If while scanning, you hear a call for you:

1. Respond to the call within 5 seconds. When scanning is interrupted by an

incoming signal, the channel will remain open for five seconds before resuming

scanning.

2. During communications the five second timer is reset from the last Rx or Tx

signal encountered.

The radio resumes scanning once the Rx or Tx activity has ceased for more than five seconds.

The SCAN key must be pressed to exit the scan mode.

DIRECT FREQUENCY ENTRY MODE

This mode is designed to facilitate quick frequency selection during emergency and other operational conditions requiring direct operating frequency selection. This operating mode is disabled along with the programming mode when the internal disable jumper is set.

1.

When the transceiver is in the normal operating mode, press FUNC and the desired operating frequency ie/ 153.2750.

2.

On the UHF band press FUNC and then 1 and the desired frequency ie/ 443.5500.

3.

You will then be asked for 12.5 or 25.0 kHz channel spacing. Select with MUP or MDN and press ENTER .

Please note in the above operation, after FUNC and " 1 " are entered, the LED display will show memory channel "000" and then the remaining digits in the desired frequency are shown as they are entered. No alphanumeric message can be entered in this mode. Operation on the new frequency occurs in both transmit and receive (simplex only) modes. If RX or TX CTCSS tones/DPL codes are required they must be programmed in afterwards.

RECEIVE FREQUENCY SIMPLEX FUNCTION

The receive frequency simplex function allows you to quickly change the transmit frequency, when operating on a split pair (repeater/semi-duplex mode), to the receive frequency to allow

2-5

direct communications. ie/ If you are transmitting on 152.000 MHz and receiving 152.555

MHz, select VHF on the band select switch and press FUNC then UP to transmit on 152.555

MHz. To return to the split pair condition, you must recall the memory channel again. This is quickly done by pressing M.UP

for one step up, then back down one step with the M.DN

key.

KEYBOARD LOCKOUT FUNCTION 2.8

2.9

The keyboard can be locked out so that accidental pressing of keys does not change frequency, etc., unknowingly to the operator. To lock the keyboard, press FUNC then LOCK .

This will disable all keyboard functions (except keyboard unlock) in the receive mode. The

DTMF function during transmit will not be affected. To unlock the keyboard, press and hold the LOCK key for two seconds until the display indicates "UNLOCK".

VARIABLE FREQUENCY MODE FUNCTION

To enter variable frequency mode, press RCL , 0 , 0 , 0 , then ENTER or enter a frequency in the direct entry mode described above. The memory channel that you were just in will still be valid but now you can manually adjust the frequency with the M.UP

, M.DN

, UP and DN keys. The

UP and DN keys will make the frequency count up or down in steps of 2.5 kHz. The M.UP

and

M.DN

keys will make the frequency count up or down in steps of 1 MHz. You can not change the label. The frequency in this mode can not be stored in memory. To exit this mode, recall one of the 200 memory channels (ie. RCL , 0 , 0 , 1 ). Variable frequency mode is disabled when the internal entry disable jumper is set.

2.10

LED DISPLAY VARIABLE DIMMING MODE

1.

With the transceiver in normal operating mode press the UP or DN keys to increase or decrease the intensity of the LED display.

2.

Once maximum intensity of the display is acheived, the UP key no longer functions.

Conversely once minimum intensity is reached, the DN key ceases to function.

2.11

90 SECOND TRANSMITTER TIME OUT FEATURE

A selectable 90 second transmitter time out feature is provided to prevent accidental continuous transmission in the event of a faulty PTT switch. With this feature enabled the transceiver will stop transmitting after the PTT is engaged continuously for 90 seconds. The timer is reset by releasing then re-engaging the PTT switch.

Press the FUNC then the M.UP

key. Use the M.UP

and M.DN

keys to select 90 SEC, which enables the feature, or NONE which disables it.

2.12

QUICK GUARD PROGRAMMING FEATURE

A quick download of any of the 200 VHF memory positions into either of the guard memory positions can be accomplished. Select the memory position whose contents you desire to download to a guard memory. Select either GD1 or GD2 memory channel as desired. Press

FUNC then 7 . The guard memory channel will now contain all the same information as the selected memory position. This feature is disabled when the FUNC 7 mode is turned off in the configuration menu.

2.13

PROGRAMMING CTCSS TONES/DPL CODES

CTCSS tones (PL tones) or Digital DPL codes can be assigned to each memory channel. The guard receiver squelch will operate on noise squelch only, but guard 1 and 2 transmit tones or codes can be programmed. To program a tone/code to a memory channel:

1.

Select the desired band on the band select switch.

2-6

2.

Use the M.UP

and M.DN

keys to select the memory channel that you want to assign a CTCSS tone or DPL code.

3.

Press the FUNC key then the TONE key. The display will show "RX TONE:" and the current tone number, as well as the tone frequency in Hz.

4.

Use the M.UP and M.DN

keys to select the tone number you require. The following is a list of the available CTCSS tones:

Number Tone Number Tone Number Tone

01 67.0

02 71.9

03 74.4

04 77.0

05 79.7

06 82.5

07 85.4

08 88.5

09 91.5

10 94.8

11 97.4

12 100.0

13 103.5

14 107.2

15 110.9

16 114.8

17 118.8

18 123.0

19 127.3

20 131.8

21 136.5

22 141.3

23 146.2

24 151.4

25 156.7

26 162.2

27 167.9

28 173.8

29 179.9

30 186.2

31 192.8

32 203.5

33 33.0*

34 35.4*

35 36.6*

36 37.9*

37 39.6*

38 44.4*

39 47.5*

40 49.2*

41 51.2*

42 53.0*

43 54.9*

44 56.8*

45 58.8*

46 63.0*

47 69.4*

48 159.8*

49 165.5*

50 171.3*

51 177.3*

52 183.5*

53 189.9*

54 196.6*

55 199.5*

56 206.5*

57 210.7*

58 218.1*

59 225.7*

60 229.1*

61 233.6*

62 241.8*

63 250.3*

64 No Tone

(carrier squelch only)

(The tones marked with * are

nonstandard tones).

4.

Press ENTER. "TX TONE" appears on the display. Repeat step 3.

5.

Press ENTER. "G1 TONE" appears on the display. Repeat step 3.

6.

Press ENTER. "G2 TONE" appears on the display. Repeat step 3 and press ENTER.

7.

The display will now show "RX DPL:" and the current 3-digit DPL code. If no DPL code is required "000" should be entered. Please note that if a DPL code is to be programmed a

CTCSS tone should not be enabled.

8.

Use the keypad to enter the required octal 3-digit DPL (Digital Coded Squelch or DCS) code. A list of all usable and unique octal 3-digit DPL/DCS codes follows:

2-7

017*

023

025

026

031

032

036*

043

047

050*

051 156

053* 122* 162

054

065

071

072

073

074

114

115

116

125

131

132

134

143

165

172

174

145* 223

152

155

205

243

244

245

266* 346

271 351

274* 356*

246* 306

251 311

364

365

212* 255* 325* 411

225* 263

226

252* 315

261

265

331

332* 413

343

* indicates GE Digital Coded Squelch (DCS) Code

371

412

423

431

432

445

466

503

506

446* 516

612

624

627

631

452* 523* 632

9.

Press ENTER. "TX DPL" appears on the display. Repeat step 8.

10. Press ENTER. "G1 DPL" appears on the display. Repeat step 8.

11. Press ENTER. "G2 DPL" appears on the display. Repeat step 8 and press ENTER.

2.14

PC MEMORY PROGRAMMING UP/DOWNLOAD CAPABILITY

The TFM-500 transceiver can be programmed by a Windows based personal computer using

Technisonic software supplied on CD with each TFM-500.

Requirements:

743

454* 526* 654 754

455* 532 662

462* 546 664

464 565 703

465 606 712

721

731

732

734

1. PC compatible computer with a CD ROM drive, running Windows 95/98/NT/2000/ME.

2. Bench power supply of 28 volts DC.

3.

PC download cable, P/N 993390-1 which can be supplied or made from the wiring diagram at the back of this section.

Connections:

1. With the PC turned off, plug the 25 pin male 'D' connector into a serial port.

2. Plug the 9 pin 'D' connector into the back of the TFM-500 transceiver.

3. Connect the power supply to the TFM-500.

Installing the MultiTDP Program:

The CD supplied with each radio contains software for all of Technisonic’s downloadable transceivers. Place the CD into your drive and use Windows Explorer to open the MultiTDP directory on the CD. Double click the MultiTDP_Install.exe

file. Follow the onscreen instructions to install the program onto your hard drive. When the program is installed, it can be run by selecting Programs from your Start menu, then select Technisonic from the submenu and finally MultiTDP .

2-8

Using the MultiTDP Program:

With the program running on your computer, a full MultiTDP instruction manual can be loaded by selecting Documentation in PDF format under the Help menu. Otherwise, to get started, pull down the File menu and select TFM-500 . The program defaults to serial port com1 but can be set to com2, 3 or 4 under the Com Port menu. The program is now ready to use. You may want to upload data from the radio and edit channels or start a new data file. The VHF and

UHF bands are treated as separate radios and must be up or downloaded and edited separately. Editing is done on a channel by channel basis. Set the channel number you would like to edit and then modify the frequencies, labels, CTCSS tones, DPL codes, wide / narrow band setting and scan lists as desired. Press the Save Record button to store the changes youv’e made to the data base below. After you have edited the channel list your can save your changes to disk and/or download to the radio. Only channels selected with a check mark will download. It is recommended to use the Select All command in the Data Transfer menu to ensure the data base in the radio matches the one in the PC. When download is selected, a message box will appear on your screen asking you to press FUNC and DN on the radio. Press these buttons on the radio before you click OK in the message box, otherwise the download will fail.

TFM-500 Upload/Download Programming Cable

P/N 993390-1 Wiring Diagram

FIGURE 2-2 TFM-500 Transceiver PC Up/Download Cable - wiring diagram

Note: If your serial port is a 9 pin connector, instead of the 25 pin use a female 9 pin D connector, connecting:

Yellow -

Blue -

Black pin 3 pin 2 pin 5

2-10

3.1

3.2

3.3

3.4

3.5

3.6

SECTION 3

INSTALLATION INSTRUCTIONS

GENERAL

This section contains information and instructions for the correct installation of the TFM-

500, VHF/FM Transceiver.

Make certain that the correct frequencies are preprogrammed in accordance with the equipment user's valid FCC operator's license, prior to installation.

EQUIPMENT PACKING LOG

Unpack the equipment and check for any damage that may have occured during transit. Save the original shipping container for returns due to damage or warranty claims. Check that each item on the packing slip has been shipped in the container. Verify that the equipment display and backlighting configuration are the same as those ordered.

TRANSCEIVER INSTALLATION

The TFM-500 transceiver is designed to be Dzus mounted and should be installed in conjunction with a IN-550 installation kit. See Figure 3-1 for an outline drawing of the unit with dimensions to facilitate the installation.

INSTALLATION KIT - CONTENTS

The IN-550 installation kit consists of:

1.

One 15 pin Cannon D mating connector (female) complete with crimp pins and hood.

2.

One 9 pin Cannon D mating connector (male) complete with crimp pins and hood.

3.

Three BNC antenna mating RF connectors (male).

ANTENNA INSTALLATION

Antenna, P/N’s ATM-150 and ATM-403 may be obtained from Technisonic Industries Limited or a suitable equivalent may be utilized with the TFM-500 transceiver. The antenna should be mounted on the bottom of the aircraft whenever possible. Consult with instructions provided with the antennas. Connect RF cables from antennas to the back of the TFM-500 unit by utilizing the BNC mating connector provided in the installation kit. The UHF connector is located on the rear, above the 15-pin D connector and the VHF connector is below the 9-pin

D.

INSTALLATION - PIN LOCATIONS AND CONNECTIONS

The pin numbers and locations for the 15 pin and 9 pin Cannon D located on the rear of the

TFM-500 transceiver are shown below. Pin connections are in provided in TABLE 3-1.

Transceiver mounted view of 15 pin female and 9 pin male connector

3-1

FIGURE 3-1 Outline Drawing for Model TFM-500 Transceiver

3-2

10

11

8

9

6

7

Pin #

1

2

3

4

5

12

13

14

15

3.6

INSTALLATION - PIN LOCATIONS AND CONNECTIONS (continued)

15 Pin D Connections - Use FEMALE Connector

Description

600 Ohm Output 1

Data Output

Panel Lighting (28VDC or 5VAC)

Memory Up

Memory Down

Mic Signal Input 1

Main Power +28VDC

Main Ground

4 ohm Speaker Output

4 ohm/600 ohm Output Ground

Data Input

DF Audio

PTT 1 (Ground Keying)

Main Power +28VDC

Main Ground

Pin #

6

7

4

5

8

9

1

2

3

9 Pin D Connections - Use MALE Connector

Description

600 Ohm Output 2

PTT 2 (Ground Keying)

Reset

Background Debug Signal

Ground

Programming Voltage In

Serial Data Out

Serial Data In

Mic Signal Input 2

TABLE 3-1

3-3

FIGURE 3-2 Wiring connections for the TFM-500 Transceiver

3-4

3.7

WIRING INSTRUCTIONS

Figure 3-2 shows all required connections and recommended wire sizes for the TFM-500

Transceiver. If problems with the correct operation of the UHF/FM Transmit function of a

TFM-500 are encountered on a specific airframe, a DC power line filter may be required.

Typical problems encountered are that UHF/FM will not transmit on high power or will not open a repeater when using a CTCSS transmit tone. Investigation has determined that once the ripple on the airframes DC (28V) power line becomes excessive the UHF transmit function and tones will distort. If the airframes generators are turned off and the UHF/FM transmit function works correctly from 28 Vdc battery power, the ripple on the DC power line is excessive. The use of DC power line filter PLF-250, p/n 021214-1 is recommended and is available from Technisonic.

3.7.1 Main Power +28VDC

The main power +28VDC (±15%) is connected to pins 7 and 14 of the transceiver. Both pins should be connected.

3.7.2 Main Ground

Ground connections are made on pins 8 and 15. Both pins should be connected.

3.7.3 PTT (Ground Keying)

The PTT line is connected to pin 13 and should be floating when the transceiver is in receive mode, and grounded during transmit mode. The PTT2 input is on pin 2 of the 9 pin connecter.

3.7.4 Front Panel Back Lighting

Front panel back lighting connection should be made on pin 3 of the transceiver. The opposite end of this lead should be connected to the panel lighting system of the aircraft.

Before connecting, verify the required panel lighting voltage (28 VDC or 5VAC) on the transceiver configuration control label.

3.7.5 Audio Outputs (600 ohms and 4 0hms)

There are two audio outputs available (1 & 2). 600 ohm audio output 1 has audio from both bands and the guard in single operator mode. When in dual operator mode, 600 ohm output 1 has audio from the VHF band and guard only while the UHF audio will be on the

600 ohm output 2.

3.7.6 Audio Output Ground

Pin 10 is the ground for both the 4 ohm and 600 ohm audio output signals.

3.7.7 Mic Signal Input

The microphone input signal is to be provided on pin 6, utilizing shielded wire with the shield grounded to pin 10. Microphone signal 2 is on pin 6 of the 9-pin D connector.

3.7.8 Memory Up/Memory Down

Remote scrolling through the 200 memory positions can be achieved by providing a ground to pins 4 (up) and 5 (down) through a momentary contact cyclic switch. The memories will scroll only on the band selected.

3-5

3.7.9 Data Input

3.8

Data communications equipment requiring direct access to the modulator and discriminator an be connected via pins 2 and 11. Data cannot be transmitted in CANADA unless equipment is approved for use with the TFM-500 by the communications regulatory authority.

INTERNAL PROGRAMMING AND GUARD ENABLE/DISABLE JUMPER

The programming and direct frequency entry modes can be disabled by removing the internal enable/disable jumper strap from pins 1 and 2 of J10. Removal of this jumper will prevent operation on any frequencies other than those programmed in the 400 memory positions and two guard receiver memory positions. Removal of the guard receiver programming enable /disable jumper strap from pins 1 and 2 of J11 will totally disable the operator’s ability to re-program the 2 guard receiver channels.

The transceiver is always shipped with the two jumpers in the entry enable positions. To place either of the jumpers in the disable position:

1.

Remove the left side of the radio.

2.

Set or remove jumpers as necessary.

3.

Re-assemble the radio in the reverse order.

Microprocessor Control Unit (MCU) PCB Module:

FIGURE 3-3 Internal Enable/Disable Jumper Locations

3-6

3.9

TRANSMITTER POWER ADJUSTMENTS

The transmitter power is adjusted to a maximum of 10 watts in high power mode and 1 watt in low power mode over the transceiver operating bandwith at the factory. If transmitter RF power re-adjustment is required, perform as follows:

1.

Select the band that you wish to adjust on the band select switch.

2.

Connect an RF through-line wattmeter to the appropriate antenna connector. Set the operating frequency to 156.000 MHz for VHF or 457.000 MHz for UHF and key the transmitter.

3.

In low power mode, set the low power adjustment potentiometer on the left side of the chassis to produce 1.0 watt of RF output power (See Figure 3-3).

4.

In high power mode, set high power adjustment potentiometer on the left side of the chassis to produce 9.5 watts of RF output power.

5.

Verify that the RF output power is between 9 and 10 watts on 138.000 MHz and

174.000 MHz for VHF or 403.000 MHz and 512.000 MHz for UHF.

3.10

TRANSMITTER MICROPHONE LEVEL ADJUSTMENT

1.

Set the transceiver operating frequency to 156.000 MHz and connect an appropriate test receiver to the RF output connector. Ensure that the output of the transceiver is terminated into a proper dummy load.

2.

Key the transmitter and input a -10 dBm (0.25 VRMS), 1 kHz audio signal into the microphone input.

3.

Adjust the microphone level potentiometer (Mic Level 1) through the access hole located on the right side of the chassis (see Figure 3-4) to produce a 2.7 kHz deviation.

4.

Verify that the deviation is at least 2.3 kHz on the following frequencies: 138.000

MHz, 162.000 MHz and 174.000 MHz.

5.

For UHF, perform the same procedure using the Mic Level 2 pot on the left side of the transceiver and use the following frequencies: 403.000 MHz, 457.000 MHz and

512.000 MHz.

3-7

FIGURE 3-4 External Adjustment Access Holes

3-8

3.11

SQUELCH ADJUSTMENT

The squelch circuit is designed to open or close depending upon the noise content and not the strength of the received signal. Therefore high squelch settings are not necessary nor possible. The squelch on both the VHF and UHF receivers is factory set to open at approximately 22 dB SINAD, while the guard receiver is set to open at 25 dB SINAD. The range of adjustability is approximately 3 to 27 dB SINAD. This adjustment can be made or altered to suit local conditions as follows:

1.

Set the receiver to 157.000 MHz for VHF or 457.000 MHz for UHF. Connect a signal generator to the antenna input of the desired band.

2.

Set the signal generator to produce a ±3 kHz deviation with a 1 kHz tone on 157.000

MHz or 457.000 MHz. Increase the signal generator RF level from 0 uV until the squelch indicator LED is on. Verify the squelch opens at the desired level.

3.

If not, re-adjust receiver squelch potentiometer through the access hole located on the bottom or side of the transceiver chassis (see Figure 3-4).

3.12

TRANSMITTER DEVIATION ADJUSTMENT

VHF:

1.

Remove the bottom cover of the transceiver.

2.

Set the VHF operating frequency to 157.000 MHz and connect an appropriate test receiver to the RF output connector. Ensure that the output of the transceiver is terminated into a proper dummy load.

3.

Key the transmitter and input a +10 dBm (2.5 VRMS), 2.5 kHz audio signal into microphone input 1.

4.

Adjust the wideband deviation limit potentimeter, R30 on the VHF Rx/Tx module (see

Figure 3-5) to produce a ±4.25 kHz deviation. Select narrow band mode on the VHF band and adjust the narrowband deviation limit potentimeter, R76 on the VHF Rx/Tx module to produce a ±2.15 kHz deviation.

5.

Verify that the deviation does not exceed ±5 kHz for wideband and ±2.5 kHz for narrowband on 138.000 MHz, and 174.000 MHz. Re-adjust R30 or R76 as required, if the deviation exceeds ±5 kHz or ±2.5 kHz, respectively.

6.

Replace the bottom cover.

UHF:

1.

Remove the top cover of the transceiver.

2.

Unplug the white coax from the guard receiver and remove the front panel.

3.

Remove the guard receiver tray.

4.

Replace the front panel and select the UHF band.

5.

Set the UHF operating frequency to 457.000 MHz and connect an appropriate test receiver to the RF output connector. Ensure that the output of the transceiver is terminated into a proper dummy load.

3-9

6.

Key the transmitter and input a +10 dBm (2.5 VRMS), 2.5 kHz audio signal into microphone input 1 if in single mode or microphone input 2 if in dual mode.

7.

Adjust the wideband deviation limit potentimeter, R30 on the UHF Rx/Tx module (see

Figure 3-6) to produce a ±4.25 kHz deviation. Select narrow band mode on the UHF band and adjust the narrowband deviation limit potentimeter, R76 on the UHF Rx/Tx module to produce a ±2.15 kHz deviation.

8.

Verify that the deviation does not exceed ±5 kHz for wideband and ±2.5 kHz for narrowband on 403.000 MHz, and 512.000 MHz. Re-adjust R30 or R76 as required, if the deviation exceeds ±5 kHz or ±2.5 kHz, respectively.

9.

Replace the bottom cover.

VHF Receiver/Transmitter PCB Module

Notes: R30 is for 25 kHz (wideband) Deviation Adjustment

R76 is for 12.5 kHz (narrowband) Deviaton Adjustment

FIGURE 3-5 Deviation Adjustment Potentiometer Location

3-10

UHF Receiver/Transmitter PCB Module

Notes: R11 is for 25 kHz (wideband) Deviation Adjustment

R102 is for 12.5 kHz (narrowband) Deviaton Adjustment

FIGURE 3-5 Deviation Adjustment Potentiometer Location

3-11

APPENDIX TO “INSTALLATION INSTRUCTIONS”

POST INSTALLATION EMI TEST

PURPOSE

The purpose of this test is to identify any interference that the TFM-500 may cause with existing aircraft systems.

TEST CONDITIONS

The TFM-500 transceiver should be installed and function tested. The antenna VSWR should be checked. A forward/reverse power check with a in-line wattmeter should show no more than 10% reflected power. For the following tests, insure that the power switch is in the high position.

METHODOLOGY

Most of the EMI tests can be accomplished on the ground. In some cases flight testing is required or is easier. If the aircraft is approved for IFR operations, then it is mandatory that interference between the TFM-500 Airborne FM and the approach aids be checked in flight.

The GPS should be operational and navigating with at least the minimum compliment of satellites.

The VHF comm should be set to the frequencies indicated with the squelch open. VOR/DME receivers should be set to the frequencies indicated and selected for display If possible, set up a

DME ramp test set on the frequencies indicated and adjust the output until the flags are out of view. The transponder and encoder should be monitored with ramp test equipment. Set the output of the transponder test set to 3db above the output necessary to achieve 90% reply. If possible set the ADF to a nearby navigation station.

Modulate the TFM-500 transmitter on the indicated frequencies for at least 20 seconds.

Observe the GPS for any degradation in satellite status or availability or flags. Listen for any noise or detected audio signals on the VHF comm(s). Listen for any noise or detected audio signals on the VOR/LOC receiver audio; look for any moment of flags or needles on the VOR/LOC/GS navigation display(s). Observe the transponder for any loss of reply or spurious reply.

List the power plant, fuel and other electric instruments in the chart provided and note any anomalies that occur while transmitting. Assess the results.

If the aircraft is equipped with an autopilot or a stability augmentation system, then test fly the aircraft and verify that operation of the TFM-500 transceiver does not have adverse effects on these systems. After checking for gross effects at a safe altitude, fly an approach with each of the different navigation systems coupled to the autopilot (ILS, GPS ETC.) and look for any anomalies.

A-1

RESULTS

If the installed system passes all of the applicable EMI tests, then no further action is required. If interference is observed then the interference must be assessed against the appropriate standards of airworthiness for the system in question. For example it is permissible for a VFR certified GPS to lose navigation capability while the TFM-500 unit is transmitting, providing that it recovers properly and promptly, but it is not permissible for an IFR Approach certified GPS to affected in the same way. A complete discussion of all the standards of airworthiness to be applied in assessing

EMI effects is beyond the scope of this document.

PROCEDURE

A.

Operate the TFM-500 transmitter on the following frequency for at least 20 seconds.

Observe the GPS for any degradation in satellite status or availability or flags.

PASS

GPS #1

FAIL PASS

GPS #2

FAIL

NOTES:

FREQUENCIES

TFM-500

143.180 MHZ

143.1825 MHZ

157.5000 MHZ

157.5425 MHZ

512 MHZ

B.

Determine if the image frequency for the VHF Comm falls within the range of the TFM-500.

If so, select a set of frequencies that will cause the TFM-500 to be set as close as possible to the image frequency. Any one of the many possible sets will suffice. Record those values in the spaces provided in the following chart. Modulate the TFM-500 transmitter on the following frequencies for at least 20 seconds. Listen for any noise or detected audio signals on the VHF comm.

Example - Bendix/King KY 196A:

The first IF frequency is 11.4 MHZ. The L.O. is above the received frequency (high side injection), therefore the image frequency is 22.8 MHZ above the selected frequency. Set the KY 196A to 120.000 MHZ and the TFM-500 to 142.8000 MHZ.

A-2

VHF #1

135.975

121.150

131.250

Image:

FREQUENCIES

TFM-500

138.0000

157.5000

157.5000

PASS

RESULTS

FAIL

NOTES:

VHF #2

135.975

121.150

131.250

Image:

FREQUENCIES

TFM-500

138.0000

157.5000

157.5000

PASS

RESULTS

FAIL

A-3

C.

Determine if the image frequency for the VOR/ILS Nav falls within the range of the TFM-

500. If so, select two sets of frequencies that will cause the TFM-500 to be set as close as possible to the image frequency. Chose one set in the localizer frequency range, and one in the VOR frequency range. Record those values in the spaces provided in the following chart. Modulate the TFM-500 transmitter on the following frequencies for at least 20 seconds. Listen for any noise or detected audio signals on the receiver audio; look for any moment of flags or needles on the navigation display.

VOR/ILS #1

108.000

108.100

Image:

Image:

FREQUENCIES

TFM-500

162.0000

162.1500

PASS

RESULTS

FAIL

NOTES:

VOR/ILS #2

108.000

108.100

Image:

Image:

FREQUENCIES

TFM-500

162.0000

162.1500

PASS

RESULTS

FAIL

A-4

D.

Modulate the TFM-500 transmitter on the following frequencies for at least 20 seconds.

Observe the Glideslope displays. Look for any movement of flags or needles on the navigation display.

G/S #1

334.7 (108.1)

FREQUENCIES

TFM-500

167.3500

PASS

RESULTS

FAIL

NOTES:

G/S #1

334.7 (108.1)

FREQUENCIES

TFM-500

167.3500

PASS

RESULTS

FAIL

A-5

E.

Operate the TFM-500 transmitter on the following frequency for at least 20 seconds.

Observe the Transponder for any spurious replys or loss of reply to test set.

FREQUENCIES

TFM-500

512 MHZ

TRANSPONDER #1

PASS FAIL

TRANSPONDER #2

PASS FAIL

NOTES:

F.

Modulate the TFM-500 transmitter on the following frequencies for at least 20 seconds.

Observe the DME displays. Look for loss of distance information on the display.

PASS

RESULTS

FAIL DME 1

978 (108.0)

1020 (112.1)

FREQUENCIES

TFM-500

489

510

NOTES:

DME 2

978 (108.0)

1020 (112.1)

FREQUENCIES

TFM-500

489

510

PASS

RESULTS

FAIL

A-6

NOTE:

For the following tests, select a frequency at the top, middle and bottom of each band of the TFM-500 transceiver.

138 to 174 MHZ Band 403 to 512 MHZ Band

Frequency #1

Frequency #2

Frequency #3

G.

At a safe altitude engage the autopilot or stability augmentation system. Modulate the

TFM-500 transmitter on the above frequencies for at least 20 seconds. Observe any effect on the autopilot or stability augmentation system.

Observations:

H.

Perform a coupled ILS approach to the aircraft's certified limits. Modulate the TFM-500 transmitter on the above frequencies for at least 20 seconds. Observe any effect on the autopilot. Repeat for second flight director/autopilot if equipped.

Observations:

A-7

I.

6

7

4

5

STEP

1

2

3

List the power plant, fuel and other electric instruments in the chart provided and note any anomalies that occur while transmitting. Assess the results.

PASS FAIL NOTES SYSTEM

Com 1&2

(UHF 403-512 MHz Band)

Transponder & Encoder

(VHF 138-174 MHz Band)

ADF 1 & 2

VG

Glideslope 1&2

(UHF 403-512 MHz Band)

VOR/LOC 1&2

(UHF 403-512 MHz Band)

Directional Gyro

A-8

11

12

13

14

STEP

8

9

10

15

Compass

Fuel Pressure

Oil Temp

Amps

Bus Voltage

Fuel %

Nt

TOT

SYSTEM PASS FAIL NOTES

A-9

STEP

16 Torque %

SYSTEM

17

18

19

Annunciators

Digital Clock

Oil Pressure

PASS FAIL NOTES

A-10

STEP SYSTEM PASS FAIL NOTES

NOTES:

A-11