|Subject:||Re: [TenTec] Re: [Orion] Orion Synthesizer speed|
|From:||Bob Henderson <firstname.lastname@example.org>|
|Date:||Mon, 12 Jan 2004 07:47:44 +0000|
I guess you guys missed my post on this at the end of December. I spoke
to Ten Tec about the jerky synthesiser response and they confirmed it to
be nothing to do with slow locking of the synthesiser, whether in the
interests of low noise or anything else. The effect is caused by the
speed with which the control microprocessor can execute instructions.
The comments made by Ten Tec on this issue are attached below:-|
(TT) The tuning is limited by the amount of overhead in the microprocessor, not the synthesizer lock time.
(TT) Tuning in the Orion was patterened after the Jupiter, which was quite acceptable. However, the Orion microprocessor controls many more operations and features. The encoder outputs 512 pulses. When tuning rapidly, if the microprocessor cannot immediately act upon the tuning pulse, the pulses are counted and when there is a break, it updates the frequency. That's why rapid tuning sounds different. I understand that there are those who would prefer smoother and faster tuning. It is on our "wish list" but we have been working on items that we feel are of greater interest to more hams.
73 Bob, 5B4AGN, P3F
Jim Reid wrote:
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