Specifications

PL 3120/PL 3150/PL 3170 Power Line Smart Transceiver Data Book 197
Impedance Circuit
This circuit, as shown in Figure 7.4, should be built in a suitable enclosure with bulkhead BNC jacks (AMP 227755-x or
equivalent). This impedance circuit, placed in series with the output path of a PLCA-22 analyzer, effectively increases
its output impedance. This will allow for a more sensitive measurement of the receive mode impedance of the product
under test.
Figure 7.4 Impedance Circuit Used For Excessive Loading Verification
Attenuation Circuit
This circuit, as shown in Figure 7.5, should be built in a suitable enclosure with bulkhead BNC jacks (AMP 227755-x or
equivalent). This attenuation circuit, or “pad”, will provide approximately 60dB of attenuation when connected into the
receive performance verification set-up of Figure 7.9.
Figure 7.5 Attenuation Circuit Used For Receive Performance Verification
For the receive performance verification, a computer running NodeUtil Node Utility (nodetuil.exe) is required.
This utility is available on the Echelon Web site at www.echelon.com/downloads
under Development Tools. The
Node Status command is used to obtain a record of the number of uncorrupted packets received by the Unit Under
Test (UUT). This set-up is described in detail in the Packet Error Measurement with NodeUtil section later in this
chapter.
88.7Ω ±1%, 1/4W
30.1k Ω ±1%, 1/4W