Atec Agilent-N432A - Manual (Page 4)

4
High accuracy—no
thermoelectric error
The high accuracy ± (0.1% of reading
+ 0.5 μW) over a wide temperature
range featured in the legacy 432A
power meter is also included in the
N432A, making it excellent for 1 mW
transfer calibration (with 478A-H75/
H76*). Accuracy can be maintained
on even the most sensitive range as
the error due to thermoelectric effect
is reduced to a negligible level.
* 478-H75/H76 has a maximum SWR of
1.05 at 50 MHz
Sensor compatibility
The N432A is compatible with the Agilent 478A and 8478B thermistor sensors.
The following table lists the frequency range and operating resistance for these
two sensors:
Thermistor sensor model Frequency range (GHz) Operating resistance (Ω)
478A 0.01 to 10 200
478A Option H63 0.000001 to 1 200
478A Option H75 0.001 to 1 200
478A Option H76 0.001 to 1 200
8478B 0.01 to 18 200
For further information on the thermistor sensors, refer to the respective manuals.