Chapter 3
55
Operation
Operating Hints
O
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Remote Location of an 11974
In cases where the device-under-test (DUT) is farther away than the 1 meter LO and IF
cables can accommodate, place the 11974 close to the DUT, but place the host spectrum
analyzer the desired distance away. In order to preserve the excellent amplitude accuracy
of the 11974, the +14.5 to 16 dBm LO power must be supplied even though the LO cables
may become quite long.
To supply the LO power, insert an 11975A Amplifier at the 11974 location. (Refer to
on page 56.) To provide the proper input power level for the 11975A Amplifier, a coax
attenuator is also required at the input of the 11975A such that the sum of the loss of the
extended LO cable and the attenuator value add up to a range of 9–11 dB at 6 GHz. Set the
OUTPUT POWER LEVEL on the 11975A for +16 dBm. The extra IF cable loss at 321 MHz
should be added to the conversion loss value of the 11974. Perform the Frequency Tracking
Calibration procedure after connection of all cables.
Содержание 11974 Series
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Страница 8: ...7 General Information 1 General Information ...
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Страница 57: ...56 Chapter3 Operation Operating Hints Operation Figure 3 4 Setup Configuration for Remote Location of an 11974 ...
Страница 97: ...96 Chapter3 Operation Using 8561A 62A 62B Spectrum Analyzers Operation ...
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Страница 107: ...106 Chapter4 Performance Tests Performance Test Procedures Performance Tests Figure 4 1 Performance Tests Setup ...
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