[j-nsp] acceptable/good laser receive power in case of different interfaces

[chip]

Depending on whose optics you're using there should be a data sheet
that shows the acceptable Tx/Rx levels for each type available from
your vendor.  I can't seem to locate a document for Juniper at the
moment.  But I assume they shouldn't be that far off from Cisco stuff.
 For example, here's a data sheet for the XENPAK module:

http://www.cisco.com/en/US/prod/collateral/modules/ps2797/ps5138/product_data_sheet09186a008007cd00_ps5455_Products_Data_Sheet.html

Check Table-2.

As far as I know, an optic will output power within a specified range
as according to what type it is, SR, LR, ER, ZR, etc...

Hope that helps a bit.


On Tue, Aug 2, 2011 at 5:26 PM, Martin T <m4rtntns at gmail.com> wrote:
> What is the acceptable Rx power in case of SFP/XFP? For example, here
> are XFP Tx and Rx signals from six FXP's:
>
> 1:
> Laser output power                        :  1.2920 mW / 1.11 dBm
> Laser rx power                            :  0.0285 mW / -15.45 dBm
>
> 2:
> Laser output power                        :  0.6420 mW / -1.92 dBm
> Laser rx power                            :  0.3054 mW / -5.15 dBm
>
> 3:
> Laser output power                        :  0.4230 mW / -3.74 dBm
> Laser rx power                            :  0.5092 mW / -2.93 dBm
>
> 4:
> Laser output power                        :  0.4180 mW / -3.79 dBm
> Laser rx power                            :  0.4208 mW / -3.76 dBm
>
> 5:
> Laser output power                        :  1.0920 mW / 0.38 dBm
> Laser rx power                            :  0.1801 mW / -7.44 dBm
>
> 6:
> Laser output power                        :  0.7680 mW / -1.15 dBm
> Laser rx power                            :  0.3337 mW / -4.77 dBm
>
>
> Is there some sort of pattern? It looks like if the Rx signal is
> lower, the Tx is higher? And what can one consider a decent Rx laser
> power level?
>
>
> regards,
> martin
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>



-- 
Just my $.02, your mileage may vary,  batteries not included, etc....