Agilent Technologies E7495A RF Instruction Manual

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E7495A/B Manual Operation / Verification
E7495A/B Manual Verification
Manual Verification Procedures
The Manual verification procedures allow you to check out the
functionality of the major sections of the hardware that do not have
automated On-board Verification Tests.
Verifying the E7495A/B RF Functionality
Verifying the CW Source Functionality (Option 500/510 only)
Verifying the Complex Modulation Functionality (Option 510 only)
Verifying the Power Meter Functionality (Option 600 only)
BatteryManagement VerificationTests

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A3 RF Functionality
E7495A/B Manual Verification
Verifyingthe E7495A/B RF Functionality
The base product of the E7495A/B consists of two main blocks: Source
and Receiver.The antenna/cable measurements use both of these blocks
and, using the Insertion Loss and Return Loss measurements, verify
the correct operation of both the source and receiver.
Test equipment
•2 - 10 dB Type-N pads (Part of E7495A/B Cal kit)
•Short Type-N cable (Part of E7495A/B Cal kit)
•6, 20, and 30 dB 849xx series Type-N pads or a 10 dB step attenuator
Insertion loss procedure
1. Press [MODE] Antenna/Cable, Two Port Insertion Loss.
2. Set the Start Frequency to 375 MHz; Stop Frequency to 2500 MHz.
3. Press Setup, Optimize and verify it is set to Accuracy.
4. Connect the two10 dB padsand a short Type-Ncable as shown in
Figure 1 on page 2.
Figure 1Connectthe10 dBpads.

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A3 RF Functionality
E7495A/B Manual Verification
5. Press Frequency/Normalize and follow the instructions.
The junction of the 10 dB pads forms a calibrated plane. Measuring
unknowns or standards is performed by splitting the plane and
inserting the unknown or standard between the 10 dB pads.
6. Connect the 6 dB pad between the two 10 dB pads.
7. Use the marker function to verify that the measured value agrees
with the pad.
8. Repeat steps 6 and 7, using differentpads in order to cover the range
of 6 – 60 dB.
Return Loss procedure
1. Press [MODE] Antenna/Cable test; Return Loss.
2. Set the Start Frequency to 375 MHz, Stop Frequency to 2500 MHz.
3. Perform the open/load and short calibration.
4. Connect a 6 dB pad to the end of the cable connected to Port 1.
5. Average/Sweep turn off averaging to clear the buffer.
6. Turn on averaging.
The best and worst return loss should be between 10 and 14 dB.
If you find a failure
•Double-check your attenuators! When you stack attenuators the
overall insertion loss is slightly higher than the sum of the values.
•Check the Port 1 and Port 2 Type-N connectors for contamination,
damage, or loose connectors.
•Reload the latest firmware.
In the event of a performance failure,you must have the instrument sent in for repair.

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CW Source Functionality
E7495A/B Manual Verification
Verifyingthe CWSource 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 RFFunctionality testprocedureon 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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CW Source Functionality
E7495A/B Manual Verification
If you find a failure
•Reload the latest firmware and repeat the test.
If the test results are slightly outside the stated limits
• Verify the connectors are clean and the connections are tight. In the event of a performance failure

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Complex Modulation Verification
E7495A/B Manual Verification
Verifyingthe Complex Modulation Functionality (Option 510only)
The Complex Modulation option adds a DSP and a special DAC in order
to output complex signals such as CDMA and CDMA2000. The output
of the DAC is mixed with the CW Source to set the output frequency.
The CW signal is not suppressed so you can see a signal ~60 MHz away
from the set frequency.
There are seven different waveforms that can be output in the Complex
Modulation mode. Generally, if one works, they all will.
Test equipment
•Spectrum analyzer
•Type-N cable
Test procedure
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 modulation to CW.
6. Set the amplitude to –50 dBm.
7. Turn the RF On.
On the Spectrum Analyzer
8. Set the frequency to 375 MHz.
9. Set the span to 2 MHz.
10.Set the reference level to –45 dBm.
11.Press Marker Peak Search.
12.Verify the amplitude of the CW signal is –50 dBm ± 2 dB.
13.On the E7495A/B, change the modulation to CDMA Forward Link
Pilot Only w/o Eq.
14.On the Spectrum Analyzer, you should see a broad spectrum signal
approximately 1.23 MHz wide.
15.Check each of the modulations available. They should all look the
same as the CDMA Forward link Pilot only.
16.Repeat steps 1 – 13 at 2.49 GHz.

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Complex Modulation Functionality
E7495A/B Manual Verification
If you find a failure
•If one or more complex modulation types look correct but others
don’t, reload the latest firmware and repeat the test.
•In order to test against any limits, you must have a spectrum
analyzer that can measure channel power or a device capable of
demodulatingandmeasuringcomplexsignals.
In the event of a performance failure,you must send the instrument in for repair.
Verifyingthe Power Meter Functionality (Option 600 only)
The Power Meter option uses the same measuring hardware as the
E4418B Power Meter. The capabilities are modified for use with the
Base Station Test market.
Test equipment
•8482A power sensor and cable
Test procedure
•For a basic checkout, if you are able to zero and cal the sensor, the
circuit is functioning correctly.
If you find a failure
If the meter does not respond to any controls or the controls are grayed
out:
•Checkthat the power meter option is enabled
If the meter does not zero or calibrate check or replace the following:
•Power Sensor Cable

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Battery Management Functionality
E7495A/B Manual Verification
Battery Management VerificationTests
Definition
The Battery Management Functional Test verifies the functionality of
the E7495A/B battery charge/discharge circuitry, and it’s ability to
switch between Battery and External DC Power.
The Battery Management Functional Test is a manual test. This
procedure is comprised of 4 tests to check out the Power Management
functionality:
•External DC Power Test – Verifies the Test Set’s ability to operate off
of External DC Power. During the External DC Power Test, the
operator will verify the status of the Display Icons and the Front
Panel Battery LED’s while operating on EXT DC Power.
•Internal Battery Power Test – Verifies the Test Set’s ability to
operate off of the Internal Battery(s). During the Internal Battery
Power Test, the operator will verify the status of the Display Icons
and the Front Panel Battery LED’s while operating on Battery
Power.
•Battery Charge Statistics- Verifies the Test Set’s ability to control
the charge functionality, communicate and Display the Data received
from the Battery. During this test the operator will verify the status
of the Display Icons, the Front Panel Battery LED’s, and the Battery
Statistics Screen.
•Battery Discharge Statistics – Verifies the Test Set’s ability to switch
between Batteries and control the discharge functions of the Battery
Controller board. During this test the operator will verify the status
of the Display Icons, the Front Panel Battery LED’s, and the Battery
Statistics Screen.

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Battery Management Functionality
Step 3 - Verify Test Set Functionality
E7495A/B Manual Verification
If any of the above tests fail:
1. Insure the External DC Power Supply is functioning properly.
2. Insure the Battery is functioning properly, a recondition of the
battery may be necessary.
Test Equipment
AC to DC Power Supply
(supplied with E7495A/B) 0950-4404
NI2040AG Battery
(supplied with E7495A/B) 1420-0883

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Battery Management Functionality
E7495A/B Manual Verification
Running the Battery Management Functional Test
NOTE When connecting or removing the Ext DC Power, the E7495A/B Test Set
can take up to 20 seconds for the Battery Status Indicators to update.
1. External DC Power Test
Setup
•Install battery into Battery Position #2 (Closest to the back of
the E7495A/B case)
•Plug the Ext DC power into the E7495A/B
•Turn the Ext DC power supply’s switch to on
•Turn the E7495A/B on and allow it to fully power-up
Test Results
•On the Front Panel Display, verify that the External DC icon
(Plug icon) is present on the lower right hand portion of the
display.
•Verify that the Battery Icons on the Front Panel Display
accurately represent the condition of the installed battery.