378 Chapter 2
Performance Verification Tests
49. Tracking Generator LO Feedthrough: Agilent E4402B, E4403B, E4404B, E4405B, E4407B,
and E4408B(Option 1DN)
and the Tracking Generator RF OUT. Refer to Figure 2-69 to connect
the type-N cable from the analyzer RF OUT to the microwave
analyzer 50 W Input.
8. On the microwave analyzer, press:
PEAK SEARCH
MKR, SIG TRK (On)
Wait for the signal to be displayed at center screen, then press
SIG TRK (Off).
9. On the microwave analyzer, press AUX CTRL,
INTERNAL MIXER, PRESEL AUTO PK then wait for the PEAKING
message to disappear.
10.Record the microwave analyzer marker amplitude in Table 2-105 as
the LO Feedthrough Amplitude for the Microwave analyzer
CENTER FREQUENCY at 3.921409 GHz.
11.Repeat step 8 through step 10 for the remaining Analyzer CENTER
FREQUENCY and Microwave Analyzer CENTER FREQUENCY
settings listed in Table 2-105. Press Single on the analyzer to
activate a single sweep each time the center frequency is changed.
12.Press System, Alignments, Auto Align, All.
13.In Table 2-105, for analyzer center frequencies of 9 kHz to 1.5 GHz,
locate the highest LO Feedthrough Amplitude then record this
amplitude as Test Record entry 1 of the performance verification test
record.
14.In Table 2-105, for the Analyzer Center Frequency of 3.0 GHz, record
this LO Feedthrough Amplitude as Test Record entry 2 of the
performance verification test record.
Table 2-105 Tracking Generator LO Feedthrough Amplitude Worksheet
Analyzer Center
Frequency
Microwave
Analyzer
Center Frequency
LO Feedthrough
Amplitude
(dBm)
9 kHz 3.921409 GHz
70 MHz 3.9914 GHz
150 MHz 4.0714 GHz
1.5 GHz 5.4214 GHz
3.0 GHz 6.9214 GHz