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CA U T IO N
Agilent 81632B/3B/4B/6B/7B Power Sensor Modules and Agilent 81635A Dual Power Sensor Module, First Edition
It is important to maintain the quality of the straight connector end of
the 81610CC Reference Cable. Never add another connector to the
straight end of the 81610CC Reference Cable, since a physical
connection is made. When the straight end of the 81610CC Reference
Cable is connected to the 81634A Power Sensor module, no physical
connection is made so there should be no degradation of connector
quality.
4 Zero the Return Loss Module and the Power Sensor Module
5 Enable the internal laser source of the Return Loss Module and
allow 20 minutes for it nto stabilize.
6 At the Power Meter:
a Set the averaging time [AvTime] to 1s
b Set the wavelength [ λ ] to the wavelength of the RTL source.
c
Set [Pwr unit] to <db>.
7 At the Return Loss Module:
a Set the averaging time [AvTime] to 1s.
b Enter the Return Loss Reference value RLref of the 81610CC
reference cable for this wavelength.
c
Press [RefCal to calibrate the Return Loss module at reference
condition.
8 At the Power Meter press [Disp -> Ref]. The Power Meter should now
read 0.0 dB.
9 Disconnect the 81610CC Reference Cable from the setup and
connect a 81113SC user cable to the Return Loss Module and leave
the other end open as shown in Figure 8.
Figure 7
Return Loss Measurement Setup
Mainframe 8163B or 8164B w/
81657A and 8163xA/B (DUT)
8163B
81613A 8163xB
81635A
in
out
81113SC
43
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