Technical - TM-11-5820-890-10-80131

TM 11-5820-890-10-8

KEYPAD BUTTON

PURPOSE

BATT

Used to check and set battery life condition in the manpack radio. When this

key is pressed, the RT display shows battery life indication.

(Battery)

(on same key as "CALL')

CALL

This key is used to communicate between the radio and an attached RCU.

(on same key as "BATT")

With FCTN set to REM and RT connected to the RCU, pressing CALL and PTT

at the same time causes the RCU display to show "CALL," and an alarm is

heard in the RT and RCU handsets.

5.3b.

Technical

Receiver-Transmitter (RT) (SIP/ASIP)

Enhanced Data

The SIP/ASIP RT offers enhanced data rates of 1200N, 2400N, 4800N, and

9600N BPS, where the "N" indicates new or enhanced rates. The

advantages of these enhanced data rates are better accuracy, great speed,

longer range, and improved forward error correction.

New Data Modes

Two new data modes are also provided: Packet (PCKT), which supports

operations involving FBCB2 hardware and software, and RS-232 by which

data messages can be sent from SlP/ASlP RT to SlP/ASlP RT using

computers and commercial "Xmodem" communications software, a widely

used file transfer protocol.

RCU Function

The SIP/ASIP RT can be used as a remote control unit by merely selecting

the "RCU" option under the [RCU] key of the SlP/ASlP RT keypad. The RCU,

C-1 11561, can still be used to remotely control a SlP/ASlP radio for voice

and SINCGARS data modes, but it cannot be used for enhanced data

modes.

An attractive feature of the SIP/ASIP RT is the ability to load GPS time from an

GPS Time Loading

attached PLGR using the very simple procedure.

Internal FSK

The SIP/ASIP RT contains an internal FSK detector circuit for use with the

Detector

"AD1" and "TF" data rates. Use of a special CX-13808/U DMD interface

cable is no longer necessary. In addition, TACFIRE devices must be cabled

directly to the SlP/ASlP RT AUD/DATA connector,

5-13