Motorola ASTRO SPECTRA Service Manual

February 3, 2003 6881076C20-E
1-6 Introduction: Control Head Descriptions
• Option Buttons — The option buttons are used for turning options on and off, such as Phone,
Scan, Emergency Call, and Secure.
• Display — The vacuum fluorescent (VF) display’s primary function is to display mode numbers,
mode names, volume level, and the status of options. It also functions as an on-off indicator for
the entire system and plays an integral role in the operator’s reconfiguration of options. The
display is 8 characters on W4, W5, and W7 models; 11 characters on the W9 model.
• XMIT and BUSY Indicators — The XMIT indicator lights when the radio is transmitting. The
BUSY indicator lights when the selected channel is busy.
• Scan Indicators — When scan operation detects activity on a non-priority (NON-PRI) channel,
the NON-PRI indicator light comes on. Activity on a second priority channel causes the priority
(PRI) indicator to light. First priority channel activity causes PRI to flash.
• 12-Button Keypad (W7 and W9) — The keypad is used to change the status of options and for
entering numbers. Several keys serve multiple functions. See the ASTRO Digital Spectra or
Digital Spectra Plus User’s Guide for a complete description of keypad operation.
-Site (Ste - #1 key) — Forces the radio to scan for a new site when the automatic multiple-
site select (AMSS) feature for wide-area coverage is in use.
- Page (2 or 2Pge - #2 Key) — Initiates a Call Alert page/enters Call ID list programming.
-Lock (Lck - #3 key) — Locks the radio onto the current site when the AMSS feature is in
use.
-Status (Sts - #4 key) — Used alone or in conjunction with other keypad buttons and the Sel
button to send a status transmission, indicating a predetermined condition change.
- Regroup (Rpg - #5 key) — Requests a change in the radio’s talkgroup assignment when
the dynamic regrouping feature is used.
- Message (Msg - #6 key) — Used alone or in conjunction with other keypad buttons and the
Sel button to transmit a message, indicating a response or temporary condition.
- Horn/Lights (H/L - #7 key) — Selects/enables radio external alarms.
- Monitor (Mon - #8 key) — Monitors the radio for channel traffic.
- Direct/Simplex (Dir - #9 key) — Used for talkaround (mobile-to-mobile) conversations.
- Recall (Rcl - * key) — Reviews modes in scan and phone lists.
- Delete (Del - # key) — Used when editing stored lists.

Motorola ASTRO SPECTRA Specifications

General

Frequency Range	136-174 MHz, 403-470 MHz
Number of Channels	Up to 255
Channel Spacing	12.5 kHz, 20 kHz, 25 kHz
Modulation	FM
Operating Temperature	-22°F to +140°F (-30°C to +60°C)