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AMPTD Y Scale
(note that Configuration 2 is not strictly speaking a dual-section attenuator, since there is no electronic
section available. However, it behaves exactly like Configuration 1 without the Electronic Attenuator
option EA3, therefore for the sake of this document it is grouped into the “Dual Attenuator”
configuration)
Single Attenuator Configuration:
You can tell which attenuator configuration you have by pressing the Attenuation key, which (in most
Modes) opens the Attenuation menu. If the first key in the Attenuation menu says
Mech Atten you have
the dual attenuator configuration. If the first key says
Atten you have the single attenuator
configuration.
Dual Attenuator Single Attenuator
In the single attenuator configuration, youcontrol the attenuation with a single control, as the fixed stage
has only two states. In the dual attenuator configuration, both stages have significant range so you are
given separate control of the mechanical and electronic attenuator stages.
When you have the dual attenuator configuration, you may still have only a single attenuator, because
unless option EA3 (the Electronic Attenuator option) is available, and you purchase it, you will have
only the mechanical attenuator.
(Mech) Atten
This key is labeled
Mech Atten in dual attenuator models and Atten in single attenuator models. In the
dual attenuator configuration, this key only affects the mechanical attenuator.
This key lets you modify the attenuation applied to the RF input signal path. This value is normally auto
coupled to the Ref Level, the Internal Preamp Gain, any External Gain that is entered, and the Max
Mixer Level, as described in the table below.
See “Attenuator Configurations and Auto/Man” on page 854
Key Path: AMPTD Y Scale, Attenuation
Remote Command: [:SENSe]:POWer[:RF]:ATTenuation <rel_ampl>
[:SENSe]:POWer[:RF]:ATTenuation?
[:SENSe]:POWer[:RF]:ATTenuation:AUTO OFF|ON|0|1
[:SENSe]:POWer[:RF]:ATTenuation:AUTO?
Fixed 20 dB stage
20 dB
31 dB electronic stage
9 kHz – 7.5 GHz
Input
Limiter