Agilent Technologies 8960
Operational Verification (Manual
Procedure)
Test Equipment Setup
Use the following procedure to manually test an 8960 that is running an
E1960A GSM Test Application. A test record is included to assist in
collecting test data. Make a copy of the test record to use.
The test equipment required for 8960 Operational Verification is:
ESG E4433B Digital Signal Generator
VSA E4406A Transmitter Tester
10 MHz
Ref Out
Manual
Verification
10 MHz
Ref In
RF In
(TX Test)
8960
RF In/Out
Audio In
Hi
10 MHz
Ref In
ESG
E4433B
LF Out
10 MHz
Ref Out
VSA
E4406A
RF Out
(RX Test)
To perform the 8960 Operational Verification tests requires that the 10 MHz
timebases be connected together. 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 the RF Input of the VSA E4406A (TX Test) with
a low loss Type-N cable.
1
±
2.0 dB
≤
-25 dBc
≤
-40 dBc
(18 Hz) <
±
.04 ppm
±
1.6 dBm
8960 Operational Verification
Test Record
Test Data Record for 8960 with E1960A GSM Test Application
Functional Verification 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 (PGSM/EGSM)
RMS Phase Error
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 Analyzer PVT 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 ≤ -6 dB
ORFS Offset ± 200 kHz ≤ -33 dB
ORFS Offset ± 250 kHz ≤ -38 dB
ORFS Offset ± 400 kHz ≤ -67 dB
ORFS Offset ± 600 kHz ≤ -76 dB
ORFS Offset ± 800 kHz ≤ -78 dB
ORFS Offset ± 1000 kHz ≤ -78 dB
ORFS Offset ± 1200 kHz ≤ -79 dB
± 0.03V
± .6 dBm
< ± 4 Deg
(DCS/PCS)
< ± 6 Deg
< ± 2 Deg.
± 0.04V
< ± 24 Hz
< ± 2 Deg
< ± 8 Deg
(0 dB) ± 2 dB
≤ 8 dB
≤ 8 dB
Manual
Verification
Note 1 - Expected test limit levels may vary according to test instrument source
used. Expected limits listed may require modification.
2
Manual
8960 Operational Verification
Verification
Analog Generator 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 operating firmware in the 8960 does not allow manual operation of
amplitude or frequency using incremental steps for either Signal Generator 1 or 2; a PC
with controlling software is required.
Connect the 8960 RF In/Out Connector to the E4406A RF Input.
On the 8960 press the ‘Local’ button and the ‘System Configure’ button .
The GPIB address must be set to: 14
3
8960 Operational Verification
Analog Generator Level Accuracy, cont.
Manual
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 frequency 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.
4
8960 Operational Verification
Analog Generator Level Accuracy, cont.
Manual
Verification
On the E4406A, press 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.
5
8960 Operational Verification
Analog Generator Level Accuracy, cont.
Manual
Verification
On the E4406A, press the ‘ZOOM’ button, the ‘Marker’ button, and the ‘Search’
button. Select the ‘TRACE’ screen button and set the trace to Spectrum
Average.
On the E4406A, press the ‘MEASURE’ Control button.
6
8960 Operational Verification
Analog Generator Level Accuracy, cont.
Manual
Verification
Step the 8960 down in amplitude in 10 dB increments to -80 dBm.
Insure that each level step is accurate within ± 2 dB.
On the 8960 perform the following set up functions:
1. Press the ‘RF Gen Freq’ button and set frequency to 1805.2
MHz.
2. Press the ‘ RF Gen Power’ button and set power to -10 dBm.
7
8960 Operational Verification
Analog Generator Level Accuracy, cont.
Manual
Verification
On the E4406A set Center Frequency to 1.8052 GHz. Step the 8960 down in
amplitude in 10 dB increments to -80 dBm. Insure that each level step is
accurate within ± 2 dB.
On the 8960 perform the following set up functions:
1. Press the ‘RF Gen Freq’ button and set frequency to 1930.2 MHz.
2. Press the ‘ RF Gen Power’ button and set power to -10 dBm.
8
8960 Operational Verification
Analog Generator Level Accuracy, cont.
Manual
Verification
On the E4406Aset Center Frequency to 1.9302 GHz. Step the 8960
down in amplitude in 10 dB increments to -80 dBm. Insure that each
level step is accurate within ± 2 dB.
Important Note:
The 8960 contains 2 complete signal generator sources (these are very
similar to the E4432/33B Signal Generator).
The operating firmware of the 8960 only provides for operation of 1
source using the manual user interface (front panel) in the analog mode.
It is not possible to test the second source in a analog mode using any
manual method.
However….the second source can be tested manually in a GSM
transmit mode. See the test titled “GSM Generator Amplitude Flatness.
Peak Phase Error, RMS Phase Error, and Frequency Error --- Source 2”
in this section.
Testing source 2 in an analog mode requires using the Verification
Automated Software.
9
8960 Operational Verification
Analog Generator Spectral Purity
Manual
Verification
Analog Generator Spectral Purity is a test to insure that the 8960 has harmonics and
spurious signals within specification.The test is run by setting the 8960 to a carrier
frequency of 300 MHz and power level of -10 dBm. Harmonics and spurious are
checked at 450MHz, 600 MHz, 750 MHz, and 900 MHz. The expected limits are:
Spectral Purity Harmonics - ≤ -25 dBc
Sub-Harmonics - ≤ -40 dBc
Non-Harmonics - ≤ -55 dBc <1500 kHz
≤ -68 dBc >1500 kHz
The current operating firmware in the 8960 does not allow manual operation of
amplitude or frequency using incremental steps for either Signal Generator 1 or 2, a PC
with controlling software is required.
Connect the 8960 RF In/Out Connector to the E4406A RF Input.
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 frequency to 300 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
8960 Operational Verification
Analog Generator Spectral Purity
Manual
Verification
On the E4406A, press the ‘Preset’ System button, press the ‘Mode’ Control
button and set to ‘Basic’ Mode.
ON the E4406A make the following settings: Center Freq: 300 MHz Span: 10
kHz
Press the ‘ZOOM’ button, the ‘Marker’ button, and the ‘Search’ button. Select
the ‘TRACE’ screen button and set the trace to Spectrum Average. The 8960
amplitude should equal -10 dBm ± 2 dB.
11
8960 Operational Verification
Analog Generator Spectral Purity
Manual
Verification
On the E4406A set the center frequency to 450 MHz. Press the
‘AMPLITUDE’ button and set Ref Value to -50 dBm. The Sub-Harmonic
expected limit is: ≤ -50 dBm.
On the E4406A set Center Frequency to 600 MHz. The Harmonic expected
limit is: ≤ -35 dBm
12
8960 Operational Verification
Analog Generator Spectral Purity
Manual
Verification
On the E4406A set the Center Frequency to 750 MHz. The Sub-Harmonic
expected limit is: ≤ -50 dBm
On the E4406A set the Center Frequency to 900 MHz. The Harmonic
expected limit is: ≤ -35 dBm .
13
Verification
8960 Operational Verification
Audio Generator Accuracy
The Audio Generator test checks to insure that the 8960 has an audio source
signal with reasonable performance of accuracy.
The test is run by setting the 8960 in the audio generator mode and looping an
audio signal from the Audio Out BNC connector to the Audio In Hi BNC
connector to measure level accuracy of the audio output. The audio generator
expected limits are:
Level Accuracy - ± 0.03V
Connect the 8960 Audio Out Connector to the Audio In Hi Connector with a
BNC cable.
Manual
Begin the test procedure by pressing the blue ‘SHIFT’ button and RESET.
14
8960 Operational Verification
Audio Generator Accuracy,cont.
Manual
Verification
Press the Instrument Select button. Press the knob and activate the
Audio Generator screen
Set audio amplitude to 1.414 V. Set audio frequency to 1 kHz.
15
8960 Operational Verification
Audio Generator Accuracy,cont.
Manual
Verification
Press the ‘Measurement Selection’ button. Use the knob and select
Analog Audio, push the knob to start selection.
The Analog Audio measurement screen should appear. The
expected limits are: Level Accuracy: ± 0.03V
16
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
Manual
Verification
RMS Phase Error, and Frequency Error
Source 1
GSM Generator tests check to insure that the 8960 has a GSM Digital signal within a
reasonable specification.The test is run by setting the 8960 to a traffic channel of 30 and
power level of -10 dBm. The E4406A is then set in a digital measurement mode and
checks the 8960 GSM signal for Amplitude Flatness (PVT), Peak Phase Error, RMS
Phase Error, and Frequency Error. The expected limits are:
Amplitude Flatness - < ± .6 dBm
Peak Phase Error - < ± 8 degrees in PGSM & EGSM Bands
< ± 12 degrees in DCS and PCS Bands
RMS Phase Error - < ± 2 degree in PGSM and EGSM Bands
Frequency Error - < ± .04 ppm + TB
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 BCH + TCH using
the knob.
4. Press the ‘Broadcast Chan’ button and set the channel to 1 using the number
keypad and the knob.
5. Press the ‘ Cell Power’ button and set power to -10 dBm using the number
keypad and the knob.
17
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
RMS Phase Error, and Frequency Error, Source 1 cont.
Manual
Verification
Go to Screen 2 of 3. Set the Traffic Channel to 124 .
Go to Screen 3 of 3. Set the expected burst to TSC0.
18
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
RMS Phase Error, and Frequency Error, Source 1 cont.
Manual
Verification
On the E4406A, press the ‘MODE’ Control button and set Mode field to GSM.
On the E4406A set the Center Frequency to 959.8 MHz (channel 124). The
Burst RF Spectrum should appear.
19
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
RMS Phase Error, and Frequency Error, Source 1 cont.
Manual
Verification
On the E4406A, press the PVTbutton.
On the E4406A, press the ‘AMPLITUDE’ Control button. Set ‘Scale/Div’ field
to be .3 dB and the ‘Ref Value’ field to be -9 dBm. The display shown above
should appear. The expected PVT limits are: <± .6 dB flatness
20
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
RMS Phase Error, and Frequency Error, Source 1 cont.
Manual
Verification
On the E4406A, press the ‘Phase & Freq’ button. The display shown
above should appear. The expected limits for Phase & Frequency are:
Peak Phase Error - <± 4 Degrees in PGSM & EGSM Bands
<± 6 Degrees in DCS and PCS Bands
RMS Phase Error - <± 2 Degrees in PGSM & EGSM Bands
Frequency Error - <± .04 ppm (18 Hz)
21
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
Manual
Verification
RMS Phase Error, and Frequency Error
Source 2
GSM Generator tests check to insure that the 8960 has a GSM Digital signal within a
reasonable specification.The test is run by setting the 8960 to a traffic channel of 30 and
power level of -10 dBm. The E4406A is then set in a digital measurement mode and
checks the 8960 GSM signal for Amplitude Flatness (PVT), Peak Phase Error, RMS
Phase Error, and Frequency Error. The expected limits are:
Amplitude Flatness - < ± .6 dBm
Peak Phase Error - < ± 8 degrees in PGSM & EGSM Bands
< ± 12 degrees in DCS and PCS Bands
RMS Phase Error - < ± 2 degree in PGSM and EGSM Bands
Frequency Error - < ± .04 ppm + TB
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 BCH+TCH using the
knob.
4. Press the ‘ Cell Power’ button and set power to -10 dBm using the number keypad
and the knob.
5. Press the ‘Cell Band’ button and set the cell band type to DCS using the knob.
6. Press the ‘Broadcast Chan’ button and set the channel to 512 using the number
keypad and the knob.
22
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
RMS Phase Error, and Frequency Error, Source 2 cont.
Manual
Verification
Go to Screen 2 of 3. Set the Traffic Band to PGSM and the Traffic Channel to
124.
Go to Screen 3 of 3. Set the expected burst to TSC0.
23
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
RMS Phase Error, and Frequency Error, Source 2 cont.
Manual
Verification
On the E4406A, press the ‘MODE’ Control button and set Mode field to GSM.
On the E4406A set the Center Frequency to 959.8 MHz (channel 124). The
Burst RF Spectrum should appear.
24
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
RMS Phase Error, and Frequency Error, Source 2 cont.
Manual
Verification
On the E4406A, press the PVTbutton.
On the E4406A, press the ‘AMPLITUDE’ Control button. Set ‘Scale/Div’ field
to be .3 dB and the ‘Ref Value’ field to be -9 dBm. The display shown above
should appear. The expected PVT limits are: <± .6 dB flatness
25
8960 Operational Verification
GSM Generator Amplitude Flatness, Peak Phase Error,
RMS Phase Error, and Frequency Error, Source 2 cont.
Manual
Verification
On the E4406A, press the ‘Phase & Freq’ button. The display shown above should
appear. The expected limits for Phase & Frequency are:
Peak Phase Error - <± 4 Degrees in PGSM & EGSM Bands
<± 6 Degrees in DCS and PCS Bands
RMS Phase Error - <± 2 Degrees in PGSM & EGSM Bands
Frequency Error - <± .04 ppm (18 Hz)
26
8960 Operational Verification
Analog Audio Analyzer
The Analog Audio Analyzer is tested to insure that the 8960 can accurately
measure an audio signal within a reasonable limit.
The test is run by setting the 8960 into the Audio Analyzer measurement
mode. The E4433B is then set to output an Audio signal on the LF Out connector
at 1.414 Vp at a frequency of 1 kHz. The Analog Audio Measurement Accuracy
expected limit is:
Levels 10mv to 20V Peak - ± 0.04V
Frequency 200 Hz to 8 kHz
Connect a BNC cable between the E4433B LF Out connector and the
8960 Audio In Hi connector.
Manual
Verification
Begin the test procedure by pressing the blue ‘SHIFT’ button and RESET.
27
8960 Operational Verification
Analog Audio Analyzer, cont.
Manual
Verification
Press the ‘Measurement Selection’ button. Use the knob and select
Analog Audio, push the knob to start selection.
FREQUENCY AMPLITUDE
4.000 000 000 00
EXT REF
GHz
-135.0
dBm
RFONMOD
Off
LF Out Amplitude
LF Out Waveform
LF Out
Off
1.414V
LF Out Source
(Func Gen)
Modulation Status Information
MOD
LF Out
STATE DEPTH/DEV
On 1.414 Vp FuncGen 1.0000 kHz Sine
SOURCE
RATE WAVEFORM
LF Out Freq
1.0000 kHz
LF Out Period
LF Out Width
On
(Sine)
(N/A)
(N/A)
On the E4433B press the LF Out button. Set LF Out to On. Set LF
Amplitude to 1.414Vp. Set the LF Out Frequency to be 1.0000 kHz.
28
8960 Operational Verification
Analog Audio Analyzer, cont.
Manual
Verification
The 8960 Analog Audio screen should display a voltage level measurement
of the audio signal from the E4433B .
The Analog Audio measurement expected limit is ± 0.04V
29
8960 Operational Verification
Analog Analyzer RF Power Meter
The Analog Analyzer RF Power Meter is tested to insure that the 8960 can
accurately measure an RF signal within a reasonable limit.
The test is run by setting the 8960 into a manual measurement mode. The
E4433B is then set to output a CW RF signal at various levels and
frequencies. The Analog RF Power Meter Accuracy expected limits are:
Levels ≥ -20 to +43 dBM - < ± 1.60 dB
Frequency 810 to 960 MHz
Begin by connecting a cable between the RF Out port of the E4433B and the
RF In/Out port of the 8960.
Manual
Verification
FREQUENCY AMPLITUDE
939.000 000 00
EXT REF
MHz
13.00
dBm
RF
MOD
ON ON
Set the E4433B to output a signal at a frequency of 939 MHz,
amplitude +13 dBm
30
8960 Operational Verification
Analog Analyzer RF Power Meter, cont.
Manual
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.
Press ‘Measurement Selection’ button and select ‘Transmit Power’ as
the Operating Mode.
31
8960 Operational Verification
Analog Analyzer RF Power Meter, cont.
Manual
Verification
Press ‘Transmit Power Setup’ button and set Trigger Source to
‘Immediate’.
On screen 2 of 2 set Expected Power to +13.00 dBm. RF Power
measurement Specification is < ± 1.63 dB.
32
8960 Operational Verification
Analog Analyzer RF Power Meter, cont.
FREQUENCY AMPLITUDE
939.000 000 00
EXT REF
MHz
-15.00
dBm
RF
MOD
ON ON
Manual
Verification
On the E4433B set the Amplitude to -15 dBm.
On the 8960 set Expected Power to -15.00 dBm.
RF Power measurement expected limit is < ± 1.60 dB.
33
8960 Operational Verification
Analog Analyzer RF Power Meter, cont.
FREQUENCY AMPLITUDE
1.850 000 000 00
EXT REF
GHz
13.00
dBm
RF
MOD
ON ON
Manual
Verification
Change the E4433B amplitude to +13 dBm and frequency to 1.85 GHz .
On screen 2 of 2 of the 8960 set expected power to +13.00 dBm.
RF Power measurement expected limit is < ± 1.60 dB.
34
8960 Operational Verification
GSM Analyzer
The GSM Analyzer is tested to insure that the 8960 can accurately measure a
GSM burst signal within a reasonable limit.
The test is run by setting the 8960 into GSM Analyzer manual measurement
mode. The ESG E4433B is then set to output a GSM burst signal at +15 dBm
amplitude. The GSM Analyzer Measurement Accuracy expected limits are:
Frequency Error
Measurement Accy. - < ± 24 Hz + Time Base
Residual Phase Error
Measurement Accy RMS - < ± 2 Degree
Measurement Accy. Peak - < ± 8 Degrees
Power versus Time
Rel. Measurement Accy at Time Offset - ± 2 dB
ORFS
Rel. Measurement Accy Freq. Offset - ± 3 dB
Manual
Verification
FREQUENCY AMPLITUDE
GSM
On
939.000 000 00 13.00
EXT REF
Data Format: Framed
Mod Type: MSK
GSM: STANDARD
Nxt Frame: Primary
MHz
GSM
ENVLP
Bits/Symbol: 1
SymRate: 270.8333ksps
Filter: 0.300 Gaussian
Chan: P-GSMBase 1
I/Q Scaling: 100%
I /
Q
Data: PN23
Repeat: Cont
0Pol: Normal
Diff Encode: On
GSM Timeslot Pattern
0
On
Normal
1 2 3 4 5 6 7
Off
Custom
Off
Off
Off
CustomCustomCustom
Off Off
Custom
Custom
dBm
RF
ON ON
Off
Custom
MOD
Pattern
Frame Repeat
GSM
On
Off
Data Format
Framed
Configure
Timeslots
Data
(N/A)
Single
Cont
Frame Trigger
(N/A)
More
(1 of 2)
Begin by connecting a cable between the RF Out port of the E4433B and the RF
In/Out port of the8960. Set the E4433B to output a signal at a frequency of 939
MHz, GSM On, Burst On or Framed Data, and amplitude +13 dBm
35
8960 Operational Verification
GSM Analyzer
Manual
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.
Select screen 3 of 3. Set ‘Receiver Control’ field to Manual. Set ‘Manual Freq’
to 939 MHz. Set ‘Expected Power’ to +13 dBm. Set ‘Expected burst to TSC0.
36
8960 Operational Verification
GSM Analyzer, cont.
Manual
Verification
Press ‘Measurement Selection’ button and select ‘Transmit Power’ as
the Operating Mode. Transmit Power window should display a reading
of approximately +13 dBm
Press ‘Measurement Selection’ button and select ‘Phase & Frequency Error’ as
the Operating Mode. Press ‘Phase & Frequency Setup’ button. Select MultiMeasurement Count value to be 10. Close Menu to turn off the Setup window.
37
8960 Operational Verification
GSM Analyzer, cont.
Manual
Verification
The Phase and Frequency Error window should appear and display
average readings of Peak and RMSPphase error and Frequency error.
The expected measurement limits are:
Peak error is <± 8 Deg, RMS error is <±2 Deg, Frequency error is <±24
Hz.
Press ‘Measurement Selection’ button and select ‘Power vs. Time’ as the
Operating Mode. Press the ‘Power vs. Time Setup’ button and then the
‘Measurement Setup’ button, set the Multi-Measurement Count value to be 10.
Close menu to turn off measurement setup window.
38
8960 Operational Verification
GSM Analyzer, cont.
Manual
Verification
Press ‘Return to PvT Control’ button then press the ‘Change View’
button.
Press the ‘Numeric 1 of 2’ button. The Power vs Time Numeric
Screen 1 should appear. The expected limits are:
0 usec - 0dBc ±2dBc -10 usec - ≤ 8dBc
39
8960 Operational
Verification
Verification
GSM Analyzer, cont.
Press the ‘Numeric 2 of 2’ button. The Power vs Time Numeric Screen 2 should
appear. The expected limits are: 542.8usec - 0dBc ±2dBc 552.8usec - ≤ 8 dBc
Manual
Note on measured values: Power versus Time measurements are depend on the
accuracy of the source being measured. In the example above the E4433B had
performance of -14 dBc at a 552.8 usec offset on the burst. Variation in burst
timing can vary the offset in dBc greatly. This measurement is meant to show
consistency between 8960 units using the same identical source for each unit
tested.
Press ‘Measurement Selection’ button and select ‘Output RF Spectrum’ as the
Operating Mode. Press the ‘ORFS Setup’ and then the ‘Measurement Setup’
button. Set Multi-Measurement Count value to 20. Close menu to turn off
window.
40
8960 Operational Verification
GSM Analyzer, cont.
Manual
Verification
The ORFS measurement screen must be configured for offset frequency values
to make a measurement. Press the ‘Modulation Frequencies’ button. Load the
default frequencies into each offset by rotating the knob to each offset and
pressing the ‘ON’ button. Load frequencies 100 kHz to 1200 kHz. Close the menu.
Press ‘Return to ORFS Control’ button. Press ‘Change View’ button and select
which modulation numeric screens to view by pressing either the ‘Modulation
Numeric 1 of 3’ or the ’Modulation Numeric 2 of 3’ buttons..
41
8960 Operational Verification
GSM Analyzer, cont.
Manual
Verification
The expected ORFS measurement limits are: (example)
ORFS Offsets ± 100 kHz - ≤ -6 dB
ORFS Offsets ± 200 kHz - ≤ -33 dB
ORFS Offsets ± 250 kHz - ≤ -38 dB
ORFS Offsets ± 400 kHz - ≤ -67 dB
ORFS Offsets ± 600 kHz - ≤ -76 dB
ORFS Offsets ± 800 kHz - ≤ -78 dB
ORFS Offsets ± 1000 kHz - ≤ -78 dB
ORFS Offsets ± 1200 kHz - ≤ -79 dB
ORFS Offsets > 1200 kHz - ≤ -80 dB
Note: A measured value (example: -79 dB at 600 kHz) is dependent on the
performance of the source being measured. In this example a typical E4433B may
have ORFS performance of -79 dB at 600 kHz from the carrier. The values may
change however according to the source. The measured accuracy of a source
should be consistent for every 8960 unit. The measurement done for this test is
meant to show test consistency between 8960 units using the same identical source
for each unit tested.
42
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