Products > Test Equipment
Replacement for the PM9610 Prescaler for Philips PM6654 High precision Counter
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SaabFAN:
Just to be clear: The 5€/PCB offer is for the unpopulated non-reworked PCB.
SaabFAN:
I have just checked the lower end of the Prescaler-Board: It works down to at least 26MHz and about 5mVrms (measured by putting the output of a 26MHz TCXO through a 10dB and 14dB attenuator before feeding it into the counter).
I haven't gotten around to build a signal source that produces higher frequencies than 120MHz though, so I havent been able to check the performance at higher frequencies yet.
david69:
Could I use Micrel prescaler SYS89875U for divider ?
There is reset as well, I enclose datasheet...
The PM9610 is divider 16?
SaabFAN:
I don't think that that component is capable of producing the required signal-levels to drive the MC10102 NOR-Gate on the mainboard of the counter correctly.
It requires PECL-Levels and the chip you're asking about has LVDS-Outputs.
If you power it with close to +4V, it might work, but the chip is operating close to the maximum rating, which isn't recommended.

What you could do: Use a fast comparator at the output of the prescaler to produce the right signal levels for the ECL-Circuits on the mainboard.

But before that: Try to inject a 250 mVpp signal directly at the connector for the Prescaler-Module and measure the output of IC116 on the mainboard with channel C enabled. If there is a signal at pin 2 of IC116, your chip should work without a comparator.

With that in mind, every other 1:16 Prescaler should also work, provided that the output is PECL-Compatible.
david69:
OK, Thank You much! The 1:16 dividers with LVPECL out
are reachable :) But there is connector BU2 and BU302
in elder version, but I don`t have it :( Where I can enable
input C on processor board?  David
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