Agilent Technologies HP 70910A Guia do Utilizador descarregar pdf (Página 53)

Chapter 3 53

Operation

Operating Precautions

Operation

Operating Precautions

CAUTION To avoid damaging your 11974 and to assure accurate measurements, be sure

to follow the recommendations in this section.

Maximum RF Input Level

The maximum RF input level, as stated in Table 1-2 on page 19, is +25 dBm CW, Peak, or

Average. However, since the 1 dB compression point at the RF input is between 0 and

+6 dBm depending on the band, meaningful measurements will end long before the

damage level is reached. Therefore, for amplitude accuracy and protection against damage,

limit the input power to the 1 dB compression point level.

Maximum LO Input Level

The maximum LO input level is +18 dBm. Care should be taken when using the 11975A

Microwave Amplifier as an LO booster for the 8566B Spectrum Analyzer or when using the

11975A for remote-location connections with the 11974 Series.

CAUTION When using an 11975A Amplifier with an 11974, the rear-panel ALC switch

must be set to the ON position and the OUTPUT POWER LEVEL set to the

stop at +16 dBm before connecting the amplifier. If the ALC switch is left in

the OFF position, the amplifier output power is high enough to destroy the

mixer diodes.

Electrostatic Discharge

CAUTION When configuring the 11974 with a spectrum analyzer, always connect the

SMA cables to the spectrum analyzer BEFORE connecting them to the 11974.

This will minimize the danger of electrostatic discharge damaging the 11974.

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Agilent Technologies HP 70910A Guia do Utilizador Página 53