
Chapter 7 –Communication Performance Verification
198 PL 3120/PL 3150/PL 3170 Power Line Smart Transceiver Data Boo
Good Citizen Verification
The following steps are used to verify that the Unit Under Test (UUT) does not inject unwanted noise onto the power
mains or excessively load the power mains.
Unintentional Output Noise Verification
The following procedure determines if the UUT is generating unwanted noise which might hinder its communication
performance or that of other devices on the power mains.
1. Connect a single PLCA-22 analyzer, the UUT, and the Isolator as shown in Figure 7.6 below. Verify that the ana-
lyzer is set for the same band of operation as the UUT (A-band or C-band) by observing the selected band in the
upper right-hand corner of the LCD display (if its band setting does not match, then it must be changed using the
Setup screen of the analyzer). Leave the PLCA-22 analyzer in idle mode (no packets being transmitted) and set it for
Internal and Line-to-Neutral coupling (coupling mode switch to the right).
2. Verify that the UUT application program is not sending messages.
3. Observe the signal strength bar graph LEDs. The -72dB LED should not be on solid and the -66dB LED should not
be flashing on either the primary or secondary bar graph meters. In addition, the Packet Detect (PKD) LEDs should
not flash any more than once per minute.
4. Record the results from Step 3 in Table 7.1 at the end of this chapter.
.
Figure 7.6 Unintentional Output Noise Verification
Unit Under Test
(UUT)
service pin
PLCA-22
To power
mains
packet detect LED
ISOLATOR
Recv
Isloated Power Line
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