Agilent Technologies HP 8642A/B Spécifications télécharger pdf (Page 106)

100

101

Detector Selection

Internal

5 MHz to 1.6 GHz

Internal

1.2 GHz to 18 GHz

External

Required Level (dBm)

LPort

to+23

+7 to+10

As required for

the detector used

RPort

0 to +23

0 to +10

As required for

the detector used

Detector Selection

The Select Detect, softkey provides selection between the HP 11848A

Phase Detectors. Verify that the selected Phase Detector is:

• Within the frequency range of the Detector/Discr. Input Frequency

entered.

• Installed in the HP 11848A Phase Noise Interface. (Option 201 adds

the 1.2 to 18 GHz Phase Detector to the HP 11848A).

External Detectors

Using an External Phase Detector to measure a device with fundamental

frequency less than 5 MHz or greater than 18 GHz requires special

considerations. The HP 3048A limits the Detector/Disc. Input Frequency

range to from 5 MHz to 18 GHz. If you are measuring a device that

exceeds the limits of the Detector/Disc. Input Frequency, enter a frequency

of less than 95 MHz for a device with a frequency of less than 5 MHz to

enable the 2 MHZ LPF, or enter a frequency of greater than 95 MHz for a

device with a frequency greater than 18 GHz to remove the 2 MHZ LPF.

Also when measuring frequencies less than 5 MHz you must filter out the

fundamental feedthrough and additive product prior to the HP 11848A

Noise Input. This is necessary to prevent overloading.

rev.05SEP89 Instr. Params:

Noise 2-37

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 452 453

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Agilent Technologies HP 8642A/B Spécifications Page 106

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