Performance Verification
Giga-tronics 2500B Series Microwave Signal Generators
Page 102
Operation Manual, Part Number 34737, Rev C, June 30, 2011
9.2.4
Frequency Range, Resolution, and Accuracy
In this test, the RF output of the 2500B is connected to the input of a spectrum analyzer, and the 2500B’s output
frequency is tested at various points within its frequency range. The internal timebase of the spectrum analyzer is used
as a reference for the 2500B to eliminate timebase errors.
9.2.4.1
Equipment and Materials
Microwave spectrum analyzer
Cables and adapters for connecting the 2500B to the frequency counter
Datasheet 1 (Table 62 on page 103)
Figure 48: Setup; Frequency Range, Resolution, and Accuracy
Table 61: Frequency Range, Resolution, and Accuracy
Frequency Range, Resolution, and Accuracy
Step
Action
1.
Connect the equipment as shown in Figure 48;
Connect the timebase output from the spectrum analyzer to the EXT REF IN connector on the
rear of the 2500B. See Figure 6 on page 19 for the location of the connector and the electrical
specifications of the external timebase.
Connect the 2500B RF Output to the low frequency input.
2.
Allow the equipment to warm up for at least 30 minutes.
3.
Set the 2500B to the lowest output frequency it is capable of (see Table 62 on page 103), and set the
RF output level to 0 dBm.
4.
Press
to activate the 2500B RF output. The RF on/off indicator illuminates blue when
the RF output is active.
5.
Use the 2500B front panel controls to set the 2500B to each frequency listed in Datasheet 1 that is
within the range of the 2500B model you are testing. Record on the datasheet each frequency as
displayed on the spectrum analyzer.
6.
For each frequency listed in the remaining rows of the datasheet, the spectrum analyzer should read
the entered frequency ±1 Hz, plus or minus the spectrum analyzer resolution. For the specifications,
refer to: Table 61 on page 102
NOTE:
In the datasheet below, test the 2500B only at the frequencies within the range of your specific model of 2500B.
For frequencies not within your instrument’s range, enter “N/A” in the test results column(s) of the datasheet.
RF ON
