Chapter 2 343
Performance Verification Tests
43. Tracking Generator Level Flatness: Agilent E4401B and E4411B (Option 1DN or 1DQ)
43. Tracking Generator Level Flatness:
Agilent E4401B and E4411B
(Option 1DN or 1DQ)
This test verifies that analyzers with the tracking generator option
(1DN or 1DQ) meet their tracking generator level flatness specification.
A calibrated power sensor is connected to the tracking generator output
to measure the power level at 50 MHz. The power meter is set for dB
relative mode so that future power level readings are in dB, relative to
the power level at 50 MHz.
Next, the tracking generator is stepped to several frequencies
throughout its range, and the output power difference relative to the
power level at 50 MHz is measured for each frequency recorded.
For frequencies below 100 kHz, a digital voltmeter and precision 50 Ω
termination are used to measure the power of the tracking generator
output. The DVM is set to read out in dBm using the MATH function
with R value set to 50 Ω. The following equation is used to calculate
dBm:
The DVM readout is corrected by making the readings relative to the
100 kHz reading from the power sensor.
Option 1DN, 50 Ω tracking generators are tested from 9 kHz to
1500 MHz.
Option 1DQ, 75 Ω tracking generators are tested from 1 MHz to
1500 MHz.
The related adjustments for this procedure are “Tracking Generator
ALC Calibration” and “Tracking Generator Frequency Slope.”
Equipment Required
Power meter
Power sensor, 50 Ω, 100 kHz to 1.5 GHz
Digital multimeter
Termination, 50 Ω
Cable, BNC
Adapter, Type-N tee, (m) (f) (f)
Adapter, Type-N (m) to BNC (f)
Adapter, BNC (f) to dual banana plug