Atec Exfo-PPM-350B-EG - Manual (Page 3)

PPM-350B
PON Power Meter
www.EXFO.com
Correctly measuring PON signals can be a
challenging task: not only can a single fiber carry up
to three signals, but the upstream signal coming from
the ONT operates in burst mode, which means that
it is only active during its “allowed” timeslot. This is
true whether the network is based on the BPON,
EPON or GPON technology. Moreover, the timeslot
is shorter in higher-speed networks such as EPON
and GPON. Designed with this in mind, the PPM-
350B PON Power Meter delivers accurate results
for burst signals.
Groundbreaking Technology—Two-Port Pass-Through*
The PPM-352B-EG-ER acts as a pass-through device, which means that it is connected between the OLT and the ONT. A small
percentage of the signal is extracted for use by the power meter's detectors.
This approach enables all wavelengths to be used simultaneously. Also, since the PON equipment can keep functioning normally, the ONT
continues to operate (to respond to the OLT), and therefore to transmit and have its laser on.
Up to 10 User-Definable Threshold Sets
Depending on the location of the test and the type of equipment used, different threshold values can be required. The PPM-350B enables
you to select from up to 10 threshold sets—each set consisting of three wavelengths (1310, 1490 and 1550 nm) having their own pass,
warning and fail thresholds. These values can be configured via the PC-based software.
CONFIGURATION
PPM-352B-EG-ER
Two-port pass-through: all wavelengths; X
upstream measurement
Downstream OLT signal (1490 nm)
X
for up to 2.5 Gbit/s
Downstream RF video signal (1550 nm)
X
Upstream BPON ONT signal for up to X
622 Mbit/s, as per ITU 983 (A, B, C)
Upstream EPON and GPON ONT signal for up
X
to 1.25 Gbit/s, as per ITU 984 and IEEE 802.3ah
Extended range for testing over the entire
X
BPON, EPON or GPON architecture
Voice
Data
1 x N
Splitter
..
..
.
Drop
Terminal
Drop
Terminal
CO
Patch Panel Patch Panel
FDH
Distribution Fiber
OLT
Optical
Video
Transmitter
EDFA
ONT
WDM
Coupler
ONT
Drop
Terminal
ONT
ONT
*Protected by US patent no. 7,187,861, German Utility Patent no. 20 2004 021 208.0, and subject
of several pending national entries in other countries under the Patent Cooperation Treaty.
Upstream Burst Detection—Not To Be Taken Lightly
The PPM-350B allows for pass-through connection in any PON architecture.
The PPM-350B’s display. The PPM-352B-EG-ER used at the ONT.