Q 007 NPN general purpose 576-0003-658 Q 100 NPN UHF low noise 576-0003-651 R 001 Pot 50k ohm w/push-on sw 562-0018-075 R 002 22 ohm ±10% 2W wire-wound 569-2004-220 R 003 47k ohm ±5% 1/8W smd 569-0105-473 R 004 47k ohm ±5% 1/8W smd 569-0105-473 R 005 47k ohm ±5% 1/8W smd 569-0105-473 R 006 47k ohm ±5% 1/8W smd 569-0105-473 R 007 47k ohm ±5% 1/8W smd 569-0105-473 R 008 47k ohm ±5% 1/8W smd 569-0105-473 R 009 47k ohm ±5% 1/8W smd 569-0105-473 R 010 10k ohm ±5% 1/8W smd 569-0105-103 R 011 10k ohm ±

242-984x-2xx (UHF) Part No. 242-988x-2xx (800 MHz) Part No. 242-989x-2xx (900 MHz) Copyright © 2001 by the E.F. Johnson Company The E.F. Johnson Company, which was founded in 1923, provides wireless communication systems solutions for public safety, government, and commercial customers. The company designs, manufactures, and markets conventional and trunked radio systems, mobile and portable subscriber radios, repeaters, and Project 25 digital radio products. Viking Head/EFJohnson logo, LTR®, LT

The microcontroller also monitors power amplifier ambient temperature and voltage and cuts back power or disables the transmitter if either are excessive. 3.2 POWER DISTRIBUTION AND SWITCHING 3.2.1 POWER SWITCHING CONTROL A diagram of the power distribution and switching circuits is shown in Figure 3-1. The main power switching is performed on the RF board by Q510 and other transistors. This switch is controlled by the front panel power switch, the ignition sense input, and the microcontroller a

Phone (507) 835-6222. Copyright© 1999 by the E.F. Johnson Company E.F. Johnson Company, which was founded in 1923, designs, manufactures, and markets radio communication products, systems, and services worldwide. E.F. Johnson produces equipment for land mobile radio and mobiletelephone services which include business, industrial, government, public safety, and personal users. Viking Head/EFJohnson logo, LTR-Net™, LTR®, and Call Guard® are trademarks of the E.F. Johnson Company. All other company

GENERAL FEATURES Bank Select A bank is a collection of selectable systems that have been set up for a specific application. For example, one bank could be programmed for operation in Minneapolis and another for operation in Milwaukee. Each bank is identified by a unique alpha tag, and up to sixteen banks can be programmed. Banks are selected by the BANK SEL menu parameter or BANK option switch. In the menu mode (see page 33), rotate the Select switch to display “BANK SEL” on the top line and the

001-9800-001 PARTS LIST 800/900 MHz RF AND PA BOARDS (CONT’D) Ref No Description Part No. Ref No Description Part No. R 254 2.2k ohm ±5% 1/8W smd 569-0105-222 R 527 10 ohm ±5% 1/8W smd 569-0115-100 R 255 56k ohm ±5% 1/8W smd 569-0105-563 R 528 100 ohm ±5% 1/8W smd 569-0115-101 R 256 27k ohm ±5% 1/8W smd 569-0105-273 R 529 680 ohm ±5% 1/8W smd 569-0115-681 R 257 62k ohm ±5% 1/8W smd 569-0105-623 R 530 10 ohm ±5% 1/8W smd 569-0115-100 (800 MHz models) R 531 680 ohm ±5% 1/8W smd 569-0115-681 47k oh

242-778x-50x Full Keypad ( 15- Key) Model Limited Keypad ( 3- Key) Model First Printing November 1999 7780- SERIES ™ ® SMARTNET /SMARTZONE / CONVENTIONAL FM TWO-WAY PORTABLE RADIO 7.5 VDC 806-824 MHz Transmit, 851-870 MHz Receive 1- Watt (Low Power) , 3- Watts (High Power) Part No. 242-778x-50x Copyright © 1999 by the E.F. Johnson Company E.F. Johnson Company, which was founded in 1923, designs, manufactures, and markets radio communication products, systems, and services worldwide. E.F. Johnson

SYSTEM AND GROUP SCANNING LTR and Conventional Mode Scanning When an LTR or conventional system is selected with system scanning enabled and roaming disabled, scanning is sequential through only the LTR and conventional systems in the scan list (LTR-Net systems are not scanned). If roaming is enabled, all three system types are scanned as described in the preceding LTR-Net description. Therefore, LTR and conventional systems are not scanned while on LTR-Net site. Scan List Programming General NO