This is an OLD bulletin but helpful for those who need to ensure they have a narrowband VHF unit or want to stock up on parts when they pop up.
DATE: October 1998
DEADLINE: October 1999 (Informational Only)
Memo To: SRN Mailing List
From: Astro Spectra Product Group
Subject: Astro Spectra Mobile VHF - 2.5kHz Capability
On June 15, 1995 the Federal Communications Commission released document 95-255, Report and Order and Further Notice of Proposed Rule Making. The report included a new channelization plan for Private Land Mobile Radio Services operating below 800MHz. This plan authorized new frequencies in the 150 to 174Mhz range which could not be synthesized by the Astro mobile VHF subscriber radio. The purpose of this notice is to announce that all Astro mobile VHF radio models shipped from the factory on or after Sept. 17, 1998 will be hardware ready for operating on new frequencies which are evenly divisible by 2.5kHz. This change has no effect on operating bandwidth, it merely allows setting of channel center frequencies to values previously not allowed. All channel frequencies that were previously available (frequencies divisible by 5.0 or 6.25kHz) will continue to be available. New radios will be referred to as 2.5kHz capable. Radios shipping within the U.S. will bear a unique marking, 2.5kHz printed on the radio identification label to the right of the FCC ID. Radios shipping outside the U.S. will not have the marking until 12/31/98 but will nevertheless be hardware capable as of 9/17/98.
In addition to being hardware capable, radios must be using host firmware version R09.51.00 (This firmware is IMBE vocoder type only. VSELP radios cannot be upgraded to support 2.5kHz capability), or later version.
To determine the firmware version of a radio, press the HOME button quickly five times soon after turn on. The display will show the word "SERVICE" followed by the host version number. Programming of new frequencies will require RSS version R06.50.00 or later.
Upgrades: Older Astro Mobile VHF radios may be upgraded to add 2.5kHz capability. All of the following is required:
1. RF board kit HRN6014C or HRN4009C depending on the radio model (see list below).
2. One Meg VOCON board (HLN6458E or later)
3. Radio Host Flash version R09.51.00 (IMBE).
Models requiring HRN6014C:
D04JHF9PW4AN D04KKF9PW4AN M04JGF9PW4AN T04JLH9PW7AN
D04JHF9PW5AN D04KKF9PW5AN M04JGF9PW5AN T04JLH9PW9AN
D04JHH9PW3AN D04KKH9PW3AN M04JGH9PW7AN T04KKH9PW9AN
D04JHH9PW7AN D04KKH9PW7AN T04JHH9PW9AN T04KLF9PW4AN
D04JKF9PW4AN L04JKH9PW7AN T04JKH9PW9AN T04KLF9PW5AN
D04JKF9PW5AN L04JKH9PW9AN T04JLF9PW4AN T04KLH9PW3AN
D04JKH9PW3AN L04KKH9PW7AN T04JLF9PW5AN T04KLH9PW7AN
D04JKH9PW7AN L04KKH9PW9AN T04JLH9PW3AN T04KLH9PW9AN
Models requiring HRN4009C:
D04KHF9PW4AN D04KHH9PW3AN M04KGF9PW4AN M04KGH9PW7AN
D04KHF9PW5AN D04KHH9PW7AN M04KGF9PW5AN T04KHH9PW9AN
Follow instructions in the Astro Digital Spectra Basic Service Manual 68P81076C20 to replace the RF board. After replacement, it is necessary to tune the reference oscillator and check transmit deviation balance as described in the Basic Service Manual.
To order board kits contact Motorola Accessories and Aftermarket Division at 1-800-422-4210. For firmware upgrade or update contact your local Motorola sales representative.
Use RSS version R06.50.00 or later to add channels. You will now be able to enter frequencies which are 2.5kHz multiples.
Potential Problems: When attempting to write codeplugs containing 2.5kHz frequencies to the radio, the following error message may appear: !!! Warning!!!The target radio does not support Frequencies with a 2.5kHz spacing. Please upgrade this radio's FIRMWARE and/or HARDWARE This indicates that either the RF board is not 2.5kHz capable, or the firmware is earlier than version R09.51.00.
THE CONTENTS OF THIS NOTICE IS FOR INFORMATION ONLY. NO WARRANTY IS IMPLIED.
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