N8481A AGILENT TECHNOLOGIES, N8481A Datasheet - Page 8

• Manufacturer Part Number: N8481A
• Description: Thermocouple Power Sensor
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of N8481A

• Frequency Max: 18GHz
• Probe Length: 130 Mm
• Frequency Min: 10MHz
• Sensor Terminals: Connector
• Features: Up To 55 DBm Wide Dynamic Range
• Lead Free Status / RoHS Status: na

Performance Characteristics (continued)
Zero set, zero drift and measurement noise
1. RH is the abbreviation for relative humidity
2. Within one hour after zero set, at a constant temperature, after a 24-hour warm-up of the power meter with sensor connected
3. The number of averages at 16 for normal mode and 32 for x2 mode, at a constant temperature, measured over one-minute interval and two standard
4. The zero set, zero drift, and measurement noise specifications are tested at 50 MHz
5. N/A is the appreviation for “not applicable”
Effects of averaging on noise:
Averaging over 1 to 1024 readings is
available for reducing noise. The table
below provides the measurement
noise for a particular sensor with the
number of averages set at 16 (for
normal mode) and 32 (for x2 mode).
Use the noise multiplier, for the
appropriate mode (normal or x2) and
number of averages, to determine the
total measurement noise value.
Sensor
model
N8481A, N8482A,
N8485A, N8487A,
N8486AR, N8486AQ
N8488A
N8481B, N8482B
N8481H, N8482H
Number of averages
Noise multiplier
deviations
Normal mode
x2 mode
Sensor
option
Standard
Option CFT
Standard
Option CFT
Standard
Option CFT
Standard
Option CFT
1
5.5
6.5
2
3.89
4.6
Range
Upper
Lower
N/A
Upper
Lower
N/A
Upper
Lower
N/A
Upper
Lower
N/A
Example:
N8481A power sensor, normal mode,
number of averages = 4
Measurement noise calculation:
< 80 nW x 2.75 = < 220 nW
5
5
5
5
4
2.75
3.25
8
1.94
2.3
Conditions
(RH)
20% to 70%
20% to 70 %
20% to 70%
20% to 70%
20% to 70 %
N/A
20% to 70%
20% to 70 %
20% to 70%
20% to 70%
20% to 70 %
20% to 70%
5
1
8
16
1
1.63
32
0.85
1
Zero
set
± 63 nW
± 25 nW
± 63 nW
± 63 nW
± 25 nW
N/A
± 63 µW
± 25 µW
± 63 µW
± 63 µW
± 2.5 µW
± 6.3 µW
4
5
64
0.61
0.72
Zero
drift
< ± 7 nW
< ± 3 nW
< ± 7 nW
< ± 7 nW
< ± 3 nW
N/A
< ± 7 µW
< ± 3 µW
< ±7 µW
< ± 0.7 µW
< ± 0.3 µW
< ± 0.7 µW
128
0.49
0.57
5
2, 4
256
0.34
0.41
Measurement
noise
< 114 nW
< 80 nW
< 114 nW
< 114 nW
< 80 nW
N/A
< 114 µW
< 80 µW
< 114 µW
< 11.4 µW
< 8 µW
< 11.4 µW
512
0.24
0.29
5
3, 4
1024
0.17
0.2