HARMAN KARDON CITATION5.0DTS
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From: Wright, Debbie Sent: Wednesday, February 25, 2004 1:21 PM To: Rico, John Subject: 5.0 Tech Memo DTS DSP Version 1.5

TECHNICAL MEMO
This memo addresses information regarding the new Citation 5.0 DTS Digital Signal Processing (DSP) board and new operating software Version 1.5. These changes provide many improvements in both the performance and operation of the Citation 5.0 A/V Preamplifier Controller. In addition, we have provided other technical notes to assist in your set up and use of the unit. The Citation 5.0/DTS and new software V1.5 offer both performance and feature improvements when compared to the 5.0 AC-3 only version. The new DSP board used in the DTS version is a later generation platform that replaces the original DSP circuits. In addition to DTS, this new board offers improvements in digital audio quality and overall operational performance. Due to the modular design of the 5.0, any 5.0 in the field may be upgraded to DTS by replacing the DSP board and upgrading the operating software to Version 1.5. The new operating software is also compatible with previous versions of the 5.0 using the older DSP board. The new software alone will upgrade any non-DTS unit resulting in both improved operating performance and some audio enhancements. Due to the low cost of upgrading the Citation 5.0 to DTS, we recommend upgrading to the new DTS platform and operating software even for those customers where DTS processing is not required. A. Improvements with New DTS DSP Board 1. Improved Circuit Stability - The new DSP platform and board design improves the stability of the digital 2.
circuits. This improvement will result in a reduction of audio dropouts particularly when AC line conditions fluctuate due to the power cycling of other electrical devices. Digital Audio Muting - The older DSP board may allow digital noise from some DVD players to pass from the DSP board through the audio outputs. This "digital noise" is heard when a DVD is in FF, Pause, Play, or Skip functions. The new digital board mutes and un-mutes faster virtually eliminating audible digital noise when operating transport functions on DVD players. Sounds Better - Listening tests indicate that the new board sounds smoother, less bright and more balanced in frequency response. The improvements affect all 5.1 and PCM digital sources. Try it and we believe you will agree.

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B. Improvements in New V1.5 Software 1. Improved IR Response - Response from IR commands has greatly improved in V1.5 compared to all
previous software versions. Please note that the 5.0 will not respond to IR commands for mode or source switching when the "volume level" message is displayed on screen. It is also normal that source switching between analog sources is faster than switching to and among digital sources or programs. If you do experience inconsistent IR control using the Citation remote, change the AAA batteries as battery wear does impair IR responsiveness. Video Detect - A line item has been added in the "Program Setup" menu so that the Video Detect circuit may be turned "Off" from its normal "Auto" condition. Some video sources, including VCR�s, have a low "sync" output that is below broadcast standards. If the Citation 5.0 detects out of spec sync levels, the unit may turn off the video signal passing through the video board and display a blue screen. If you have a video source that intermittently flashes to the blue display, turn "Off" the "Video Detect" feature. This feature should only be used for problematic video sources. Digital Audio Detect - The 5.0 will automatically detect PCM, Dolby Digital and DTS (where applicable) bitstreams and switch to the appropriate digital surround mode. V1.5 includes the ability to easily override the Auto Detect circuit by pressing the Dolby button on the remote. (NOTE - In addition to turning off this circuit by pressing the Dolby button, Auto Detect may also be shut off in the "Program" menu for each source. This circuit should normally be left "ON" under normal operating conditions.)

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file://H:\Brands\harmankardon\Citation\5.0\5.0%20For%20BP\Manuals-procedures-specs\... 2/23/2005