The bulletin is from 2004 and I'm not sure if the issue was corrected in the newer batteries without needing to upgrade firmware. Can anyone confirm?
This SRN supersedes SRN1463 SRN - 1463A
August 2004
Subject: XTS3000 PREMATURE LOW BATTERY ALERT/ DISTORTED OR NO TX AUDIO
Symptoms:
The XTS3000 units may experience premature low battery alerts and/or distorted TX audio when used
with IMPRES “smart” battery packs NNTN4435, NNTN4436, NNTN4437, HNN9031, HNN9032, and NTN9862.
Potential Problem Chargers:
All XTS3000 with firmware prior to R07.20.00 that uses the IMPRES “smart” batteries NNTN4435, NNTN4436, NNTN4437,
HNN9031, HNN9032, and NTN9862.
Cause:
This is due to stray or parasitic capacitance on the center data pin of the IMPRES battery packs. This
capacitance can cause an oscillating condition on the data pin, which can make the radio misinterpret
and indecisive about what battery pack type is connected to the radio. The radio software may revert
to clamshell battery defaults, which is a higher low-battery alert indication threshold and low-power
output. Premature low-battery alert indication will be the result, even though full capacity of the battery
is available. Also, if the parasitic oscillation frequency falls within the audio bandwidth, this may
modulate the transmitted signal and will be demodulated by the receiving unit as undesired audio noise.
Corrective Action:
Option 1 - Use of Battery Insulator kit RLN5649A. The kit includes battery contact insulators and instructions on how to
apply them to the battery center contact. Kits are available at no charge. Contact AAD @ (800)422-4210 for availability.
Option 2 - Upgrade software with enhanced Clamshell detection software (version R07.20.00 or greater). Please contact
Subscriber Support Team @ 800-927-2744 to obtain information to obtain the upgrade kit.
