Maintenance
50
Specifications, RS-232 Interface
Table 27
RS
- 232 Interface
Specifications, IEEE-488 GPIB Interface
Table 28
IEEE
- 488 Interface
Calibration Frequencies, Typical
(MHz)
††
4028A250K
4028A400K
4028A2M
4028A3M
4028A4M
4028A10M, 4028B10M,
4028C10M
4028A25M
4028B3M
0.25, 0.40
0.40
1.8, 2.0, 2.17
2.5, 3.2, 3.5
3.5, 4.0
10.0, 13.56, 15.0
25.76, 27.12, 28.48
2.5, 3.2, 3.5, 4.0
Calibration Power, Typical
3.5 kW
VSWR, Max.
1.05:1
Insertion Loss, Max.
0.05 dB (with female 7-16 DIN connectors)
Directivity, Min.
28 dB
† For rated accuracy, no more than 1% AM; Harmonics –50 dBc or less
Derate accuracy by 2% (2
) outside cal. power or cal. frequency
Derate accuracy by 2% (2
) below 15 °C and above 35 °C
†† Other calibration frequencies available upon request
Logic Levels
Meets all EIA Standard RS-232-C specifications
Modes of Operation
Switch and bus selectable
Talk Always
Allows the 4421 to send to the bus keyboard-initiated
measurements only
Addressable
Allows the 4421 to be commanded by an RS-232 interface controller
Connector
RS-232 Interface Type
Humidity, Max
95% (non-condensing)
Altitude, Max
10,000 feet (3,000 m)
Temperature Range
Operating
Storage
0 to 50º C (32 to 122º F)
–20 to +50º C (–4 to +122º F)
Dimensions
6.5”L x 4.5” W (165 x 115 mm)
Weight
0.5 lbs (0.23 kg) nominal
Logic Levels
Meets all IEEE Standard 488-1978 specifications
Modes of Operation
Switch and bus selectable
Talk Only
Allows the 4421 to send to the bus keyboard-initiated measurements
only
Addressable
Allows the 4422 to be addressed as talker or listener under the
command of an IEEE-488 bus controller
Connector
Standard IEEE-488 bus type
Humidity, Max
95% (non-condensing)
Altitude, Max
10,000 feet (3,000 m)
Temperature Range
Operating
Storage
0 to 50º C (32 to 122º F)
–20 to +50º C (–4 to +122º F)
Dimensions
6.5”L x 4.5” W (165 x 115 mm)
Weight, Nominal
0.5 lbs (0.23 kg)
