Product Overview - Agilent Technologies 8494A Operating And Service Manual

1 Introduction

Product Overview

C A U T I O N
10
Agilent 8494A/B, 8495A/B, and 8496A/B are 50- ohm coaxial
step attenuators.
For the 8494A/B, the attenuation can be varied in 1 dB steps, or
10 dB steps for the 8495A/B and 8496A/B. The attenuation shown
on the control knob is the additional attenuation added in the
signal path over the insertion loss of the attenuator in the 0 dB
position.
• Agilent 8494A/B instruments are four- section attenuators with a
range of 0 dB to 11 dB in 1 dB steps.
• The 8495A/B is a three- section attenuator with a range of 0 dB
to 70 dB in 10 dB steps.
• The 8496A/B is a four- section attenuator with a range of 0 dB
to 110 dB in 10 dB steps.
The attenuator sections are connected in cascade. Each section
consists of a precision, thin- film attenuator card, a lossless
thru- line and a ganged pair of edge line transmission lines. The
edge lines are flexed to make contact with either the attenuator
card or the thru- line. The edge line contacts are gold- plated leaf
springs which ensure long life and high repeatability. Low- torque
cams flex the edge lines.
page 22 shows the switching arrangements.
Do not exceed the RF power rating of 1 W average or 100 W peak with a
maximum pulse width of 10 µs. Do not connect an attenuator RF input or
output connector to greater than ±7 Vdc. If the attenuator must be connected
to a device with a potential greater than ±7 Vdc, use a blocking capacitor.
Agilent 8494/95/96A/B Attenuators Operating and Service Manual
Table 8, "Attenuator Switching Order," on