[DSP-10] DSP-10 with external Frequency Control

[Richard Ewing]

Peter,

First the is the 10mhz xtal with the kit is an acceptable grade rock. It 
is  not temperature compensated and as xtal age they drift.  You can run 
either the 10mhz internal xtal or the external 10mhz GPS system. Not both 
concurrently. Per W7PUAs design if you run the internal xtal there is a 
molex plug that loops the rock into the circuit.

Lastly if you want to run the weak signal modes, EME2, LHL7, etc transmit 
frequency accuracy is a MUST. In a scenario, for example, running on 10ghz, 
with locking the DSP-10, transverter (controlled by and external frequency 
synthesizer) with the external frequency standard one can reasonable 
control the 10ghz signal out to 1 - 2 hz in terms of accuracy..  The 
filtering and bandpass requirements are very tight 20hz+/-.

If you are curious as to a possible external frequency standard option I 
refer to our web site. URL:
http://home.teleport.com/~rewing/10mhz_construction.htm

GL / 73






At 06:58 PM 2/28/2002 -0500, you wrote:
>What is the frequency accuracy of a DSP-10 using a GPS reference combined
>with the EX-KIT cheap crystals?
>
>
>Pieter
>N4IP
>
>
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de KO7N   CN84ia

Richard Ewing
PNW VHF Society C-075
http://home.teleport.com/~rewing