Testing the Agilent Technologies 8960 for Operational Verification
• The Agilent 8960 can be very difficult to t est for proper function and
operational verification. The complex types of tests used in cellular
manufacturing and the multi-functional design of the 8960 makes it very
difficult to uncover potential operational problems.
It is important to note that a f airly rigid process should be followed for any
testing of the 8960 for functionality and calibration. Many of the 8960 circuits
are designed to work as independent test tools. There is no single pr ogram
that can be run to check everything so a step process is described in this
document to make testing easy and thorough.
By following the Verification / Adjustment Test Record Guide (s ee next page)
and using the instructions provided for each step , you should be ab le to
easily check out any 8960 and be assured of its functional performance.
Verification
If a 8960 should fail the test sequ ence please include a copy of the
Test Record with any unit returned to Agilent Technologies.
Many products are returned to Agilent Te chnologies for repair or
Calibration with no atta ched information regarding any failures observed
or work requested. Consequently there are many instances of equipment
returned to customers with inadequate repairs and ‘No Trouble Found’
classifications. The more information Agilent Technologies receives
regarding a failure the more likely it is to be pr operly repaired.
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Operational Verification
Functional Verification with 8935 E6382 Expected Limit (Note 1) Pass Fail
Analog Generator Level Accy
Analog Generator Spectral Purity
Harmonics
Sub-Harmonics
Analog Audio Generator Accuracy
GSM Generator
Amplitude Flatness
Peak Phase Error
RMS Phase E rro r
Frequency Error
Analog Audio Analyzer Accuracy
Analog Analyzer RF Power Meter
GSM Analyzer Frequency Measurement Accy.
GSM Analyzer Residual Phase Error
RMS Error
Peak Error
GSM An alyze r PV T Accy Expected Limit (Note 1) Pass Fail
PVT Offset 0usec and 542.8usec
PVT Offset -10usec
PVT Offset 552.8usec
GSM Analyzer ORFS Measurement Expected Limit (Note 1) Pass Fail
ORFS Offset ± 100 kHz (-9 dB) <± 3 dB
ORFS Offset ± 200 kHz (-36 dB) <± 3 dB
ORFS Offset ± 250 kHz (-41 dB) <± 3 dB
ORFS Offset ± 400 kHz (-70 dB) <± 3 dB
ORFS Offset ± 600 kHz (-79 dB) <± 3 dB
ORFS Offset ± 800 kHz (-81 dB) <± 3 dB
ORFS Offset ± 1000 kHz (-81 dB) <± 3 dB
ORFS Offset ± 1200 kHz (-82 dB) <± 3 dB
± 2.0 dB
≤ -25 dBc
≤ -40 dBc
± 0.03V
± .6 dBm
(PGSM/EGSM)
(DCS/PCS)
< ± 4 Deg
< ± 6 Deg
< ± 2 Deg.
(18 Hz) < ± .04 ppm
± 0.04V
± 1.6 dBm
< ± 24 Hz
< ± 2 Deg
< ± 8 Deg
(0 dB) ± 2 dB
≤ 8 dB
≤ 8 dB
Verification
Note 1 - Expected test limit levels may vary according to test instrument
source used. Expected limits listed may require modification.
Optional Verification with Phone (Call Processing)
Phone Testing Pass Fail
Mobil e Stat ion Origination
Base St ation O rigin ation
Traffic Channel Handover
Mobile Transmit Level Handover (levels between 5 and 15)
Mobile Transmit Timing Advance Handover
Mobile Transmit Time Slot Handover (timeslots between 3 and 5)
Dual Band Handoff (PGSM to DCS)
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Operational Verification
Test Equipment Setup
The test equipment required for Operat ional Verification is:
Agilent ESG E4433B Digital Signal Generator with Opt: UN8
Agilent VSA E4406A Transmitter Tester with Opt: BAH
Laptop PC with Visual Basic capability and GPIB card
There is automated software available on the Momentum Support CD-ROM.
The software fully automates the following verification procedure. The software
title is “8960Verify”. See the following pages titled “Startinging the Automat ed
Software” on how to run the automated test package.
10 MHz
Ref Out
Verification
10 MHz
Ref In
RF In
(TX Test)
HP 8960
E5515A
RF In/Out
Audio In
Hi
10 MHz
Ref In
HP ESG
E4433B
LF Out
10 MHz
Ref Out
HP VSA
E4406A
RF Out
(RX Test)
• To perform the Operational Verification tests requires that the 10 MHz Timebases
be connected to gether. Connect the 10 MHz Reference Output of the 8960 to the
10 MHz Ref In of the ESG E4433B. Connect the 10 MHz Ref Out of the ESG
E4433B to the 10 MHz Ref In of the VSA E4406A with BNC cables.
• The RF In/Out Connector of the 8960 will be alternately connected to either the
RF Out of the ESG E4433B (RX Test) or th e RF Input of the VSA E4406A (TX Test )
with a low loss Type-N cable.
3
Operational Verification
Starting The Automated Software
• The Operation Verification can be run using an automated soft w are program
available for the 8960. The equipment required f or the automated test is
identical to that required for manual operation:
• Agilent ESG E4433B Digital Signal Generator
• Agilent VSA E4406A Transmitter Tester
• Laptop PC with Visual Basic capability and GPIB card
• The automated test adds some additional b enefit over the manual version.
Power loss in the RF cable used for connection between the 8960 and the
E4433B or E4406A c an be measured and calibrated out. The au tomated test
keeps track of all failures and can provide a print of results and the end of the
test.
• To start the test , click on th e program titled “8960Verify” in the Programs
list
4
Operational Verification
Starting The Automated Software
Verification
The software control panel should appear like the example above
• The first step is to set the GPIB addresses for each of the instruments.
Click on the ‘HP-IB’ button to make these adjustm ents.
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Operational Verification
Starting The Automated Software
The interconnecting RF cable can be calibrated. Click the ‘Cable Calibration’
Button and follow the screen instructions. The first step is to establish a
reference level for comparing the RF cable against.
• When the reference level is establ ished the RF Test cable is inse rted in the path
and measured. The software automatically stores the calibration factors for
testing.
6
Operational Verification
Starting The Automated Software
The test is started by clicking o n either the ’Analyzer’ or ‘Generator’ test
buttons. In this example the Analyzer Test is active. The test first instructs the
user to attach the test cables and then begin by clicking ‘Cont’.
• This example is th e concluding results of the Analyzer test. The resul t s can be
printed by clicking the ‘Prin t’ button.
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Operational Verification
Starting The Automated Software
The Generator test runs the sam e as the Analyzer test. The RF test cable is
attached between the Spectru m Analyzer and the test set and then begin by
clicking ‘Cont’.
• This example is th e concluding results of the Generator test. The resul ts can be
printed by clicking the ‘Prin t’ button.
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Verification
Operational Verification
Analog Generato r Level Accuracy
Analog Generator Level Accuracy is a test to insure that the 8960 can set a basic level
and then step in 10 dB increments accurately.
The expected limit is:
RF Generator Output Level, RF In/Out (2 sources ) - ± 2.0 dB
The current oper ating firmware in the 8960 does not allow manual operation of amplitude
or frequency using incremental steps for either Sig Gen 1 or 2, a PC with controlling
software is required.
A Laptop (or PC) is connected to the GPIB port of the 8960. For manual control run
“8960 Control” software. For automated control run the “8960Verify” and
“Generator T est” software.
Connect the 8960 RF In/Out Connector to the E4406A RF I nput.
On the 8960 press the ‘Local’ bu tton and the ‘System Configure’ button . The
GPIB address must be set to: 14
9
• Operational Verification
• Analog Generator Level Accuracy, cont.
Verification
On the 8960 perform the following set up functions:
1. Press the blue ‘SHIFT’ button and the ‘PRESET’ button (front
panel buttons not shown above).
2. Press the display ‘Operating Mode’ button and set mode to
Test using the knob.
3. Press the display ‘Test Function’ button and set function to CW
using the knob.
4. Press the ‘RF Gen Freq’ button and set f r equency to 939 MHz
using the number keypad and the knob.
5. Press the ‘ RF Gen Power’ button and set power to -10 dBm
using the number keypad and the knob.
10
Operational Verification
Analog Generato r Level Accuracy, con t .
Verification
• On the E4406A, p ress the ‘Preset’ System button, the ‘MODE’ Control
button and set to ‘Basic’ Mode .
On the E4406A, press the ‘FREQUENCY’ Control button and set the Center
Frequency to 939 MHz.
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Operational Verification
Analog Generato r Level Accuracy, con t .
Verification
• On the E4406A, p ress the ‘ZOOM’ button, the ‘Marker’ button, and the
‘Search’ button. Select t h e ‘TRACE’ screen button and set the trace to
Spectrum Average.
On the E4406A, press the ‘MEASURE’ Control button.
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Operational Verification
Analog Generator Level Accuracy, cont.
Verification
• Run the 8960 Control software on the Laptop (PC) and set the following:
• Selected control screen: PL13 Siggen 1 RF FREQ: 939 MHz
• RF NORMAL: -10 dBm NORMAL P…: 10 dB GSK MOD: OFF
Step the 8960 down in amplitude in 10 dB increments to -80 dBm.
Insure that each level step is accurate within ± 2 dB.
13
Operational Verification
Analog Generato r Level Accuracy, con t .
Verification
• Run the 8960 Control so ftware on the Laptop (PC) and set the
following:
• Selected control screen: PL13 Siggen 1 RF FREQ: 1.8052 GHz
• RF NORMAL: -10 dBm NORMAL P..: 10 dB
On the E4406A set Center Frequency t o 1.8052 GHz. Step the 8960 down i n
amplitude in 10 dB increments to -80 dBm. Insure that each leve l step is accurate
within ± 2 dB.
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Operational Verification
•
Analog Generato r Level Accuracy, con t .
Verification
Run the 8960 Contro l software on the Laptop (PC) and set the followi n g:
Selected control screen: PL13 Siggen 1 RF FREQ: 1. 9302 GHz
RF NORMAL: -10 dBm NORMAL P..: 10 dB
On the E4406A set Center Frequency t o 1.9302 GHz. Step the 8960 down i n
amplitude in 10 dB increments to -80 dBm. Insure that each leve l step is accurate
within ± 2 dB.
Turn RF: OFF Before proceeding to SigGen 2 Tests
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