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SECTION III

OPERATION

3.1

INTRODUCTION

This section contains information concerning the operation procedures for the BK Radio GPH Flex•Mode

Series handheld VHF radios. Information on installation and programming is contained in Section 2 of this

manual.

WARNING

DO NOT OPERATE THE TRANSMITTER IN CLOSE

PROXIMITY TO BLASTING CAPS

WARNING

DO NOT OPERATE THE RADIO IN AN EXPLOSIVE

ATMOSPHERE (PETROLEUM FUELS, SOLVENTS,

DUST, ETC.).

3.1.1 Display Options

GPH Series Radios can be equipped with a standard 7-Segment Display, an Alphanumeric Display, or no

display at all. Radios with either a 7-Segment Display or an Alphanumeric Display are also equipped with

a keypad, and can be programmed to operate on one or more channel groups.

Radios with a keypad and display have a slide-out keypad cover. To remove or install the cover, turn off

the radio and remove the battery (see Battery Installation, page 2-1).

An Alphanumeric Display shows channel and scanning information in a different way from a 7-Segment

Display. The annunciators across the top of the display are arranged differently, but convey the same

meaning. An Alphanumeric Display can also show letters, instead of just numbers.

Radios with an Alphanumeric Display can be programmed to operate in 7-Segment mode (see Section

2.2.5.3). The channel and scanning information will appear in the same way as a 7-Segment display, but

the annunciators are still different.

Display annunciators indicate the following information:

7-Segment Alphanumeric Indication

PR PR Priority Channel

PROG PRG Programming Mode (includes PR)

SCAN SCN Scan List Channel

(On Alphanumeric Display, flashing SCN indicates Scanning in

progress, and RX SCN indicates Receiving on a Scanned

channel.)

TX TX Transmit

RX RX

Receive

Programming mode only

ID ID

Automatic Numeric Identification (ANI)

Programming mode only

CG CG

User Code Guard

Programming mode only

GRP

Group Label

Alphanumeric Display only

Summary of content (13 pages)

PAGE 1
SECTION III OPERATION 3.1 INTRODUCTION This section contains information concerning the operation procedures for the BK Radio GPH Flex•Mode Series handheld VHF radios. Information on installation and programming is contained in Section 2 of this manual. WARNING WARNING DO NOT OPERATE THE TRANSMITTER IN CLOSE PROXIMITY TO BLASTING CAPS DO NOT OPERATE THE RADIO IN AN EXPLOSIVE ATMOSPHERE (PETROLEUM FUELS, SOLVENTS, DUST, ETC.). 3.1.
PAGE 2
Operation GPH Series VHF Radio PRG TX RX SCN ID CG G R P 7-SEGMENT DISPLAY ALPHANUMERIC DISPLAY FIGURE 3-1 Liquid Crystal Displays 3.2 BASIC OPERATION Operating procedures are basically the same for all three display types (7-Segment, Alphanumeric, and no display), with some obvious differences. For example, a radio with no display or keypad has no keys to press.
PAGE 3
GPH Series VHF Radio Operation 3.2.3 Code Guard Operation Code Guard™ allows one radio or group of radios to be selectively called within a system. If the radio has been programmed with Code Guard, use the following receive and transmit instructions. Code Guard™ is a trademark of BK Radio. 3.2.3.1 Code Guard Receive Turn power on by turning the volume knob clockwise. Select a Code Guard channel by turning the channel selector knob.
PAGE 4
Operation GPH Series VHF Radio B Group Selector Knob positions 1-16 select groups 1-15. 1 2 3 FCN 4 5 6 PRI 7 8 9 ENT * 0 # CLR 1. Press [#] twice to select a channel. 2. Press a number key for the new channel number. 3. Press the [ENT] key or wait 5 seconds. The radio returns to normal operation for the new channel, and the selected group is displayed. C. Custom Selector Your dealer will provide you with the pre-programmed group/channel combinations for your radio.
PAGE 5
GPH Series VHF Radio 3.3 Operation SCAN OPERATION 3.3.1 Receive Scan operates only while the radio is not transmitting. The radio checks for signals on channels in the preset scan list, as well as the channel selected by the channel selector knob. When a signal is detected, scanning stops and the message is received. The received channel is shown in place of the transmit channel. Once the signal ends, the radio continues to monitor the channel for the preset scan delay time before it resumes scanning.
PAGE 6
Operation GPH Series VHF Radio 3.3.2 Transmit With Scan On When Switch B (scan) is up, the radio transmits on the channel selected by the channel selector knob. 1. Select a transmit channel by turning the channel selector knob. 2. Press and hold the PTT switch and talk in a normal voice. When the PTT switch is released, the radio continues to monitor the selected channel for the preset scan delay time before it resumes scanning. 3.3.2.
PAGE 7
GPH Series VHF Radio Operation 3.3.3 Change the Scan List The radio can be programmed to enable the user to add or remove channels from the scan list. If user changes are enabled, follow these steps to change the scan list: A B C 1. Slide Switches B (scan) and C (priority) down. 2. Select a channel to be added or removed from the scan list by turning the channel selector knob. If the channel is already on the scan list, SCN appears in the display. 3.
PAGE 8
Operation GPH Series VHF Radio 3.4.1 Dual Priority Scan In each group, up to two of the sixteen channels can be designated as priority channels. These two, PR1 and PR2, are periodically tested for activity, even if a different transmission is being listened to. Activity on PR2 preempts activity on any of the non-priority channels. Receptions on PR1 have priority over any other channel in the group, including PR2.
PAGE 9
GPH Series VHF Radio Operation 3.4.2.2 Priority Mode B With Switch C (priority) up and Switch B (scan) down, the radio can receive on the knob-selected channel while sampling the priority channel. If the priority channel becomes active, the priority indicator lights. The radio changes to the priority channel and holds for the duration of the transmission To reply to a message on the priority channel, turn the channel selector knob to the priority channel, and then transmit.
PAGE 10
Operation GPH Series VHF Radio NOTE: If the radio is programmed for Dual Priority operation, only Priority Channel 1 can be changed with the keypad. NOTE: A channel can be the priority channel even if it is on the scan list. Due to multiple sampling of the same channel, however, maximum performance occurs when the priority channel is not on the scan list. 3.
PAGE 11
GPH Series VHF Radio 3.7 Operation OTHER OPERATIONAL FEATURES The BK Radio G Series is based on a microprocessor core that allows extra features and operational characteristics to be programmed into the radio. Your dealer can help define the best operational settings for your system and program them into the radio. 3.7.1 Scan Delay Scan delay lets the radio receive a response to a transmission before scanning the other channels for activity.
PAGE 12
Operation GPH Series VHF Radio 3.7.6 Busy Channel If the radio has been programmed for busy channel operation, it will operate in one of the following three modes: Busy Channel Indication Busy Channel Lockout Busy Channel Lockout Override 3.7.6.1 Busy Channel Indication The yellow busy channel indicator glows if there is carrier activity on the selected channel.
PAGE 13
GPH Series VHF Radio Operation 3.7.7.2 Channel Labels You can program the radio with a label for each of the 15 channel groups and a label for each of the 16 channels within each group. To display the channel number associated with a channel label: 1 2 3 FCN 4 5 6 PRI 2. Press the [#] key again to display the channel number. 7 8 9 ENT 3. Press and hold the [#] key to display the channel label. * 0 # CLR 4. Press [ENT]. 1. Press the [#] key to display the group number.