1. Manuals
  2. Brands
  3. TIL Manuals
  4. Radio
  5. 1792
  6. User manual

TIL 1792 User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Model 1792

VHF Radio

FAA APPROVED
×
ECP202 — 2014 Dec 30
NOT FAA APPROVED
All Weather Inc. • 1165 National Drive • Sacramento, CA 95834 • USA • 800.824.5873 • www.allweatherinc.com
User's
Manual
Rev. B

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 1792 and is the answer not in the manual?

Questions and answers

Related Manuals for TIL 1792

Summary of Contents for TIL 1792

  • Page 1: Vhf Radio

    Model 1792 VHF Radio User’s Manual FAA APPROVED × ECP202 — 2014 Dec 30 Rev. B NOT FAA APPROVED All Weather Inc. • 1165 National Drive • Sacramento, CA 95834 • USA • 800.824.5873 • www.allweatherinc.com...
  • Page 2 Copyright © 2011, All Weather, Inc. All Rights Reserved. The information contained herein is proprietary and is provided solely for the purpose of allowing customers to operate and/or service All Weather, Inc. manufactured equipment and is not to be released, reproduced, or used for any other purpose without written permission of All Weather, Inc.

  • Page 3: Table Of Contents

    1792 VHF Radio User's Manual TABLE OF CONTENTS 1. OVERVIEW ......................... 1 2. INSTALLATION AND CHECKOUT ..................2 2.1 Set Operating Frequency ......................2 2.1.1 Remove the Bottom Enclosure Cover................. 2 2.1.2 Set the Transmitter Frequency .................... 3 2.1.3 Replace the Bottom Enclosure Cover ................. 7 2.2 Mounting Bracket ........................

  • Page 4: Overview

    AWOS 3000. The Model 1792 VHF Radio operates over the frequency range from 117.975 MHz to 138.000 MHz, and uses DC power (negative ground only). The frequency is programmable over the specified frequency range with a channel spacing of 25 kHz.

  • Page 5: Installation And Checkout

    User's Manual 2. INSTALLATION AND CHECKOUT 2.1 SET OPERATING FREQUENCY The operating frequency must be set before the Model 1792 VHF Radio is used. The frequency is set using jumpers inside the radio enclosure. 2.1.1 Remove the Bottom Enclosure Cover To access the frequency setting jumpers, you must first remove the bottom enclosure cover.

  • Page 6: Set The Transmitter Frequency

    1792 VHF Radio User's Manual 2.1.2 Set the Transmitter Frequency The operating frequency may be programmed over the frequency range from 117.975 MHz to 138.000 MHz with a 25 kHz channel spacing. 1. Determine the operating frequency to be programmed. Jumpers on the Single-Channel Memory Set Board (Figure 2) are used to set the frequency based on its MHz and kHz components.
  • Page 7 1792 VHF Radio User's Manual 2. Refer to Table 1 to select the integer portion of the frequency. Find the desired frequency in the Operating Frequency column, and install the jumper(s) accordingly. Table 1. MHz Frequency Selection Jumper Settings Operating...
  • Page 8 1792 VHF Radio User's Manual 3. Refer to Table 2 to select the decimal portion of the frequency. Since 0.001 MHz is 1 kHz, this portion of the frequency is expressed in kHz in the table. Find the desired frequency in the Operating Frequency column, and install the jumper(s) accordingly.
  • Page 9 1792 VHF Radio User's Manual Operating Jumper Location Frequency 800 kHz 400 kHz 200 kHz 100 kHz 50 kHz 25 kHz (kHz) Figure 3 shows an example of the jumper setting for a frequency of 123.175 MHz. Figure 3. Jumper Settings for 123.175 MHz...

  • Page 10: Replace The Bottom Enclosure Cover

    1792 VHF Radio User's Manual 2.1.3 Replace the Bottom Enclosure Cover 1. Position the bottom cover on the chassis. 2. Position one screw in each corner of the bottom cover mounting holes. 3. Secure the three screws for the “inside” of the enclosure cover.

  • Page 11: Calibration

    Figure 5. VHF Radio Secured in Mounting Bracket Using Wing Screws 2.3 CALIBRATION The Model 1792 VHF Radio is calibrated at the factory prior to shipment, and should not need to be calibrated again during installation. Power level and modulation calibration are performed as part of the annual revalidation described in Section 4.1.3.

  • Page 12: Operational Check

    1792 VHF Radio User's Manual Figure 6. VHF Radio Connections 2.5 OPERATIONAL CHECK Ensure that the VHF radio operates as described in the operating instructions in Chapter 3. Section 4.2 describes how to reduce the static if it is evident in the broadcast.

  • Page 13: Operating Instructions

    1792 VHF Radio User's Manual 3. OPERATING INSTRUCTIONS 3.1 SWITCHES, CONTROLS, AND INDICATORS Figure 7 shows the switches, controls, and indicators on the front panel of the VHF radio. Figure 7. VHF Radio Front Panel Controls Table 3 provides a functional description of each of the VHF radio switches, controls, and indicators.

  • Page 14: Operating Instructions

    1792 VHF Radio User's Manual SWITCHES CONTROLS & FUNCTIONAL DESCRIPTION INDICATORS The unlabeled squelch control above and to the right of the fuse is not SQUELCH CONTROL used, and should remain in the fully counter clockwise position. SQUELCH The squelch indicator LED above the unlabeled squelch control should INDICATOR remain off since the squelch control is not used.

  • Page 15: Maintenance

    If the problem persists, contact All Weather, Inc. Customer Service. 4.1 PERIODIC MAINTENANCE Periodic maintenance of the Model 1792 VHF Radio is divided into three categories within the maintenance cycle: monthly, triannual, and annual maintenance procedures. 4.1.1 Monthly Maintenance Check the cabling for integrity.
  • Page 16 1792 VHF Radio User's Manual Figure 8. Insert Power Meter Between Antenna Cable and CDP Back Panel VHF Connector 3. Apply power to the VHF radio by turning the power switch on the radio’s front panel on. 4. Record the VHF radio output power level on the Annual Technical Performance Record.
  • Page 17 1792 VHF Radio User's Manual reflectedpower 1  forwardpower VSW R reflectedpower 1  forwardpower Sample Calculation: Reflected power = 0.02 W Forward power = 2.5 W reflected power     forward power 0894 0894   ...
  • Page 18 1792 VHF Radio User's Manual Modulation CAUTION Use isolators or attenuators as needed to protect the test equipment. If RF cables must be disconnected when switching between frequency and modulation tests, turn the radio off using the switch on the radio’s front panel.
  • Page 19 1792 VHF Radio User's Manual 4. Use the modulation adjustment potentiometer on the VHF radio to adjust the modulation depth to 90%. Figure 9. VHF Radio Modulation Adjustment Potentiometer 5. Use the VHF adjustment potentiometer (R29) on the CDP peripheral interface board to lower the signal level until the modulation decreases to 80%.

  • Page 20: Voice Output Static Reduction

    4.3 FUSE REPLACEMENT A 5 A fuse is located on the front panel of the Model 1792 VHF Radio. Check this fuse first if the VHF radio should fail, and replace as necessary with an appropriately rated replacement.

  • Page 21: Specifications

    1792 VHF Radio User's Manual 5. SPECIFICATIONS Parameter Specification Frequency Range 117.975 to 138.000 MHz Channel Spacing 25 kHz Duty Cycle Transmitter Power Output 5 to 10 W Output Power Stability 1.1 W VSWR Carrier Stability (-40 to +55ºC) ±1.000 Hz max Incidental FM and PM from Modulation ±100 Hz max...

  • Page 22: Forms

    1792 VHF Radio User's Manual 6. FORMS These master forms should be copied and sufficient copies stored at a convenient location in each site's Facility Reference Data File (FRDF). The Annual Technical Performance Record is to be completed at system commissioning, after major repair work, and during annual revalidation.

  • Page 23: Warranty

    1792 VHF Radio User's Manual 7. WARRANTY Unless specified otherwise, All Weather Inc. (the Company) warrants its products to be free from defects in material and workmanship under normal use and service for one year from date of shipment, subject to the following conditions:...
  • Page 24 All Weather Inc. 1165 National Drive Sacramento, CA 95818 1792-001 Fax: 916.928.1165 Revision B Phone: 916.928.1000 August, 2011 Toll Free: 800.824.5873...

Table of Contents