Agilent Technologies 8935 Series, Manual

Page: 191 / 343

190 Chapter 8
Performance Tests
RF Generator Level Accuracy Performance Test 5
RF Generator Level Accuracy
Performance Test 5
The purpose of this test is to verify that the Test Set meets the
specification limits in PTR (Performance Test Record)
Table 9-5, “RF
Generator Level Accuracy Test 5 Record,” on page 242 . Using a
measuring receiver and sensor module, at several frequencies up to 1
GHz the Test Set is set to generate levels between
−
10 and 125 dBm (in
5 dB steps) at it’s DUPLEX OUT connector. The level is measured with
the tuned RF level feature of the measuring receiver. At each frequency
the measuring receiver connection is moved to the RF IN/OUT and the
level measured from -40 to
−
125 dBm. As the test proceeds you may be
required to recalibrate the measuring receiver.
To extend the measurement frequency to 2 GHz the second method uses
a microwave converter and amplifier to extend the measurement range
(see
Figure 8-10 on page 192 ).
Figure 8-9 Setup 1 for Measurements to 1 GHz
Procedure 1
Steps 1 to 5 in the following procedure apply to Setup 1 shown in Figure
8-9 on page 190 .
1. Before connecting the test set to the measuring receiver:
a. Reset the instrument.
b. Zero and calibrate the sensor module.
NOTE
Make sure the sensor module’s calibration data is entered into the
measuring receiver.
2. Connect the equipment as shown in Setup 1 whether intending to
measure frequencies to 1 GHz or 2 GHz.
DUPLEX OUT
Measuring Receiver
INPUT 50
Ω
SENSOR
RF IN/OUT
Sensor Module