[time-nuts] Info for Vectron CO 223A38L2 100 MHz oscillator

Wendler, John jwendler at harris.com
Tue Aug 11 13:46:13 UTC 2009


Thanks to everyone for their replies, and to Bob Raker for a scan from the 1990 Vectron catalog.  

The unit is spec'd to run from 24V, +/-5%, with 12-28 V tolerable at varied output power..  The CO-22 indicates a higher output level and frequency. A standard unit should deliver +13 dBm into 50 Ohms at +24 V.  An L2 unit should deliver greater than +10 dBm into 50 ohms at 24 V.  This particular unit does not have the external voltage tune option.  Stability is spec'd at +/- 3 e10 ^ -8 over +15C to +35C (Temp Range A).  The "3" indicates an aging of 3 e10 ^ -8 / day, 5 e10 ^ -6 / yr.

The L2 suffix indicates an ultra low phase noise option, which is 10 dB better than the standard option.  Specs for standard and L2 options:

Offset	Standard	L2
kHz	dBc/Hz		dBc/Hz
0.1	-120		-130
1	-135		-145
10	-140		-150
50	-145		-155


The unit has never had wires soldered to it.  The output power measures +12 dBm at 100 MHz on my 8560 spectrum analyzer.  (An indicative but non-authoritative power measurement)  Dropping the input voltage to 15 V drops the output power to +10.5 dBm.  The startup current at 24 V was about 240 mA, dropping to about 118 mA after warm-up.

I will have to look up the specs on the company Agilent E5500 phase noise test set; it is quite possible that this oscillator is spec'ed beneath its noise floor.

Regards,

John

John P. Wendler, PE
 
Sr. Principal Engineer
Harris Corporation
1011 Pawtucket Blvd
Lowell, MA 01853
 
(O) 978-442-4822
(F) 978-442-4239
(M) 978-729-3040 (New)

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