Teledyne LeCroy OE695G - Manual (Page 13)

Instruction Manual
922562-00 Rev A 7
Reference Receiver
The OE695G contains optional, built-in software reference receiver filters for
common Fiber Channel, Ethernet, and ITU telecom standards. These reference
receiver filters provide a 4-pole Bessel Thompson low pass filter response for the
combined oscilloscope and optical-to-electrical (O-E) system with the -3dBe
(electrical) power at 0.75* bitrate.
Available reference receiver filters include:
8GFC (8.5 Gb/s)
10GBASE-W (9.953 Gb/s)
OC192 (STM64) (9.953 Gb/s)
10GBASE-R (10.3125 Gb/s)
10GFC (10.519 Gb/s)
ITU-T G.975 FEC (10.664 Gb/s) ITU-T G.709 FEC (10.709 Gb/s)
10 GbE FEC (11.096 Gb/s)
10GFC FEC (11.317 Gb/s)
User Defined (up to 11.5 Gb/s)
None (maximum 12.667 Gb/s)
The software reference receiver supplied standard with the OE695G is based on
a “nominal” oscilloscope response. The typical uncertainty in this standard
reference receiver frequency response is ±1.6 dBe up to Fref =0.75*bit rate and
±4 dBe 2*bitrate setting.
An OE695G-REFCAL OE695G reference receiver calibration can be purchased
that will provide less uncertainty with the OE695G when used with a specific
oscilloscope and a specific channel. This REFCAL is usually purchased at the time
of initial OE695G and oscilloscope purchase. If this is the case, then Teledyne
LeCroy will calibrate the specific OE695G to a specific serial number oscilloscope
channel (channel 4 unless otherwise specified) and the resultant reference
receiver uncertainty will be
± 0.85 dBe up to Fref =0.75*bit rate, and ±4 dBe
2*bit rate setting on the specified oscilloscope input channel on the 11, 17, 20,
30, 39, 50, 75, 90, or 100 mV/div gain ranges. The calibration will be indicated
on the OE695G dialog, shown above. Multiple OE695G can be calibrated to
unique oscilloscope channels to allow usage of multiple OE695G.
NOTE: If the OE695G-REFCAL is purchased after the initial OE695G/oscilloscope
purchase, the oscilloscope must be returned to Teledyne LeCroy for the OE695G-
REFCAL to be performed.
A custom reference receiver (User Defined) can be applied for any bit rate up to
11.5 Gb/s. Bit rates up to 12.5 Gb/s bit rates may be specified, but beyond 11.5
Gb/s, the reference receiver requirements cannot be maintained.