Key Fob Covert Wireless Audio Transmitter/Recorder Model T-2765-KF The most important thing we build is trust
how to contact COBHAM copyright notice For operator and troubleshooting information, customers are encouraged to refer to the details in this manual. For additional clarification or instruction, or to order parts, contact COBHAM. Copyright © 2010 - 2011 Customer Service is available Monday through Friday between the hours of 9:00 AM and 5:00 PM EST at: Tel: 603-880-4411 Fax: 603-880-6965 Website: www.cobham.com/surveillance Email: dtc.info@cobham.com DTC Communications, Inc.
TABLE OF CONTENTS manual conventions NOTE: Describes special issues you should be aware of while using a particular function. WARNING: Calls out situations in which equipment could be damaged or a process could be incorrectly implemented, but in which operator safety is not a factor. Introduction .....................................................................................................................4-5 Accessories.................................................................................
INTRODUCTION Accessories • 1 T-2765-KF Transmitter • 2 AAA Lithium 1.5V batteries (nonrechargeable) • 1 Data sheet • 1 Operator’s Manual • 1 Screwdriver • 1 Programming/Watermark Software • 1 USB Cable NOTE: The unit does NOT power up automatically when the battery is inserted.
QUICK START The following Quick Start procedure assumes the T-2765-KF has already been configured via USB as desired. Factory-set transmit frequency and/or other parameter settings can be modified as described in the Programming section, starting on page 11. Install the battery by removing the End-Cap using the screwdriver provided, and inserting the battery, with anode (battery button) head first (unit is protected against accidental insertion the wrong way round). Re-attach the End-Cap.
OPERATION Unit Configuration Prior To Deployment The unit is configured prior to deployment with supplied software via the USB connector. This allows the user to: • Set the transmit frequency. It is recommended to stay within +/- 1 MHz of the factory setting (or significant transmit range reduction may result). • Select AGC (Automatic Gain Control) or Fixed Gain audio mode. • Download, and delete, recorded audio files.
OPERATION Button Operation • To prevent accidental activation, all buttons require at least a 1-second depression. The Panic-OFF function requires a 3-second press. • The TRANSMIT, RECORD and PANIC buttons toggle their respective functions ON and OFF. • If the unit is OFF, it automatically powers ON when the any of the three buttons are pressed.
OPERATION NOTE: Always make sure you have fresh batteries installed. NOTE: The unit does NOT power up automatically when the battery is inserted. 8 TRANSMITTING The FM transmitter operates in the following mode: • Analog Narrow - 2.5kHz FM deviation Note that transmitted audio is analog, and is not scrambled or encrypted. WARNING: Always make sure the unit is properly turned-OFF before removing the battery cover.
OPERATION All recordings are watermarked to ensure their evidential integrity. The audio recording feature is enabled and disabled using the Unlock button. • Press the Unlock (RECORD) button to commence recording. • If you are just testing, speak into the microphone, allowing the recording to progress for a few moments. • Turn OFF the T-2765-KF by pressing the LOCK and UNLOCK buttons simultaneously for at least one second.
OPERATION NOTE: Always turn the unit OFF and remove used batteries when not in use. It is imperative to discard partially used batteries, as their remaining life is not predictable. Always start an operation with a fresh Lithium battery. TIP: Attach (only) one car key onto Key Fob to minimize jingling noise and metal-RF antenna interference.
PROGRAMMING INTRODUCTION Cobham has built flexibility via programming options you have on the T-2765-KF. Cobham factory programs your main frequency at time of order at no additional charge to you. Software and programming cable are included with the kit, enabling you to change your frequencies and other associated features. Unit configuration is managed with Cobham’s Universal Programming Software.
PROGRAMMING TIP: Make sure that you program your devices to match frequencies and test the components as a system prior to going into the field! Installing Universal Programming Software on your PC NOTE: Uninstall any previous versions by going to Add/Remove Programs, clicking on Universal Programmer, and clicking on uninstall. Place the Universal Programming Software CD into your CD drive and complete the following steps: 1. Locate the file install.exe and double-click to start software installation. 2.
PROGRAMMING Launching Cobham Universal Programming Software 1. Remove the Keyfob’s End-Cap. 2. Install one end of the USB programming cable to the USB connector on the Keyfob. 3. Connect the other end of the USB programming cable to an available USB port on your computer. 4. Launch the Universal Programmer application. The Connect Device dialog box displays. (It will automatically close when the new device is recognized.
PROGRAMMING OPEN and SAVE A downloading message displays momentarily then the Universal Programmer Main Screen displays (below). By selecting FILE > SAVE, it is possible to save a particular suite of channel settings to a file for future recall. Similarly, FILE > OPEN can be used to recall a suite of saved channel settings that can then be programmed into the TX. User Comments are NOT saved when the channel setting information is saved to a file.
PROGRAMMING In the TX Channels tab, select the channel. Press the Edit button. Click on the channel of interest, then click this button to edit individual channel settings. Not applicable for this device. The Edit Channel Settings dialog box displays. Enter the frequency in MHz. Click OK.
PROGRAMMING The TX Options dialog box displays. Select AGC (Automatic Gain Control) enabled or disabled. Click Update to reset Device Clock to connected PC’s system time.
PROGRAMMING Flash Updates Select File > Flash.
PROGRAMMING The Open dialog box displays. Select the designated TXT file provided for the Flash Update. Click Open.
PROGRAMMING The Flash Device message box displays. The Flash Update process takes a few minutes. Do NOT interrupt the process. When the progress bar reads 100% complete, you can proceed to use the KeyFob.
WAVE CHECKER Digital Watermark The digital watermark is a specially encoded header, which is added to the (.wav) file. The audio data itself is not changed, and it in no way affects the audio playback. Wave Checker is a handy utility that can be used to authenticate the audio wave (.wav) files created with the MMD1 by examining the watermark. The application installation is described on page 11. To use the Wave Checker utility, complete the following steps: 1. Double-click the Wave Checker.exe file.
WAVE CHECKER 3. Navigate to the (.wav) file that you want to authenticate and select the file. Click the Open button (Fig. 2.). One of three results will display: Unmodified (Fig. 3.), Unmodified but date/time not correct (Fig. 4.), or Audio data modified (Fig. 5.). Fig. 3. Result: Unmodified wave file. Fig. 4. Result: Unmodified wave file but time/date not correct. The result shown in Figure 3 indicates that the file is trustworthy. Fig. 5. Result: Wave file audio has been modified.
SPECIFICATIONS Specifications ITEM RF Power (RF) Antenna Frequency Stability Frequency Range Minimum Tuning Step – 250 Hz Deviation Spurious and Harmonics AUDIO/RECORDING Microphone Recording Capacity POWER Power Sources Battery Life MISC Unit controls and indicators Connectors Dimensions Weight Operating Temp Range SPECIFICATION 100 mW Integrated Within +/- 3.
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Cobham Tactical Communications & Surveillance 486 Amherst Street • Nashua, New Hampshire 03063 • 603-880- 4411 www.cobham.
