General Information
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Keysight 849x and 1158x Operating and Service Manual
11
General Information
Attenuator overview
The 8490D/G, 8491A/B, and 8493A/B/C are small, light-weight, low-power,
50-ohm coaxial fixed attenuators.
The attenuators cover broad frequency ranges and choice of connector types.
Each model comes with Options to accommodate various attenuation values as
shown in
Table 1
List of coaxial fixed attenuators
The Option number indicates the attenuation value. For example, Option 003
indicates 3 dB attenuation, Option 010 indicates 10 dB attenuation, and so on.
Model
Option
Frequency range
Connector type
8490D
003, 006, 010, 020, 030, 040
DC to 50 GHz
2.4 mm (m), (f)
8490G
003, 006, 010, 020, 030, 040
DC to 67 GHz
1.85 mm (m), (f)
8491A
003, 006, 010, 020, 030, 040,
050, 060
DC to 12.4 GHz
Type N (m), (f)
8491B
003, 006, 010, 020, 030, 040,
050, 060
DC to 18 GHz
Type N (m), (f)
8493A
003, 006, 010, 020, 030
DC to 12.4 GHz
SMA 3 mm (m), (f)
8493B
003, 006, 010, 020, 030
DC to 18 GHz
SMA 3 mm (m), (f)
8493C
003, 006, 010, 020, 030, 040
DC to 26.5 GHz
3.5 mm (m), (f)
