| Products > Test Equipment |
| Replacement for the PM9610 Prescaler for Philips PM6654 High precision Counter |
| << < (7/18) > >> |
| 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 |
| Navigation |
| Message Index |
| Next page |
| Previous page |