4
CW Source Functionality
E7495A/B Manual Verification
Verifying the CW Source Functionality (Option 500/510 only)
The optional CW source uses the same internal source as is used for the
antenna cable measurements. The option adds an internal step 5 dB
attenuator to increase the output range.
Test equipment
• Spectrum analyzer
• Type-N cable
Test procedure
You will connect the source directly to the spectrum analyzer’s input
and step the CW source in 1 dB increments while reading the spectrum
analyzer’s peak marker. The value should always be within 2 dB of the
CW sources stated output.
1. Perform the RF Functionality test procedure on page 2.
2. Verify the step attenuator’s functionality.
On the E7495A/B
1. Press [Mode], Spectrum/Tools.
2. Press Signal Generator.
3. Set the units to Frequency.
4. Set the frequency to 375 MHz.
5. Set the amplitude step to 2 dB.
6. Set the amplitude to –25 dBm.
7. Turn the RF On.
On the Spectrum Analyzer
1. Set the frequency to 375 MHz.
2. Set the span to 10 KHz.
3. Increase the resolution BW to 1 KHz, if the update rate is very slow.
4. Set the Reference Level to –25 dBm.
5. Press Marker Peak Search.
6. While you watch the marker readout on the spectrum analyzer, step
the E7495A/B amplitude from – 25 to –89 dBm by pressing the down
arrow.
The Marker amplitude should show a 2 dB ± .5 dB change for each
press of the down arrow. Any amplitude should be within 2 dB (± the
uncertain of the spectrum analyzer used).
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