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Agilent Technologies, Inc.
Learning Products Department
24001 E. Mission
Liberty Lake, WA 99019-9599
U.S.A.
Edition/Print Date
All Editions and Updates of this manual and their creat ion dates are listed below.
March 2001 E1962B cdma2000 Test Application Revision B.01
September 2001 E1962B cdma2000 Test Application Revision B.02
November 2001 E1962B cdma2000/IS-95/AMPS Test Application Revision B.03
The following general safety precautions must be observed during all phases of operation of this instrument.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture , and intended use of the instrument. Agilent Tec hnologies Inc. assumes no
liability for the customer’s failure to comply with these requirements.
GENERAL
This product is a Safety Cl a ss 1 in st r u m e n t (provided wi th a pro tective eart h te rminal). The pr o tective
features of this product may be impaired if it is used in a manner not specified in the operation instructions.
All Light Emitting Diodes (LEDs) used in this product are Class 1 LEDs as per IEC 60825-1.
This product has been designed and tested in accordance with IEC Publication 1010, "Safety Requirements f or
Electronic Measuring Apparatus," and has been supplied in a safe condition. This instruction documentation
contains information and warnings which must be followed by the user to ensure safe operation and to
maintain th e product in a safe condition.
ENVIRONMENTAL CONDITIONS
This instrument is intended for indoor use in an installation category II, pollution degree 2 environment. It is
designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters . Refer to the
specifications tables for the ac mains voltage requirements and ambient operating temperature range.
V ent ilation Requireme nts: When inst alling the pro duct in a cabinet, the convection int o and out of t he product
must not be restricted. The ambient temp erature (outside the cabinet) must be less than the maximum
operating temperature of the product by 4° C for every 100 watts dissipated in the cabinet. If the total power
dissipated in the cabinet is greater than 800 watts, then forced convection must be used.
BEFORE APPLYIN G POWER
Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety
precautions are taken. Note the in strument's external markings described under Safety Symbols.
To m inimize shock hazard, the instrument chassis and cover must be connected to an electrical protective
earth ground. The instrument must be connected to the ac power mains through a grounded power cable , with
the ground wire firmly connected to an electric al ground (safet y ground) at the power out let. Any inter rupt ion
of the protective (grounding) conductor or disconne ctio n of the protec tive ear th terminal will cause a pote ntial
shock hazard that could result in personal injury.
FUSES
Only fuses with the required rated cur rent, voltage , and speci fied type (norma l blow, time delay, etc.) should be
used. Do not use repaired fuses or short-circuited fuse holders. To do so could cause a shock or fire hazard.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
DO NOT REMOVE THE INSTRUMENT COVER
Operating personnel must not remove instrument covers. Component replacement and internal adjustments
must be made only by qualified service personnel.
Instruments that appear damaged or defective should be made inoperative and secured against unintended
operation until they can be repaired by qualified service personnel.
WARNINGThe W ARNIN G sign denotes a h azard. It calls attention to a pr ocedure, prac tice, or th e
like, which, if not correctly performed or adhered to, could result in personal injury.
Do not proceed beyond a WARNING sign until the indicated conditions are fully
understood and met.
CAUTIONThe CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the lik e,
which, if not corre ctly per formed o r adhered t o , could re sult in damage t o or dest ruction of part or
all of the product. Do not proceed beyond a C A UTION sign until the indicat ed conditions are full y
understood and met.
Caution, refer to accompanying documents
Warning, risk of electric shock
Earth (ground) terminal
Alternating current
Frame or chassis terminal
Standby (supply). Units with this symbol are not completely disconnected from ac mains
when this switch is off.
Product Markings
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indicated the year the design was proven.
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States National Institute of Standards and Technology, to the extent allowed by the Institute’s calibration
facility, and to the calibration faci lities of other International Stan d ar d s O r ga nization members
Agilent Technologies Wa rranty Statement for Commercial
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Agilent Technologies 8960 Series 10 Wireless Communications Test Set
Agilent Technologies E1962B cdma2000/IS-95/AMPS Mobile Test Application
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According to ISO/IEC Guide 22 and CEN/CENELEC EN45014
Manufacturer’s Name:Agilent Technologies UK Ltd.Agilent Technologies, Inc.
Manufacturer’s Address:
Electronic Products & Solutions
Group - Queensferry
South Queensferry
West Lothian, EH30 9TG
Scotland, United Kingdom
24001 E. Mission Avenue
Liberty Lake
Washington
99019-9599
USA
Declares, that the product
Product Name:
8960 Series 10 Wireless Communications Test Set
Model Number:E5515B
Product Options:This declaration covers all options of the above product.
Conforms with the following European Directives:
The product herewith compiles with the requirements of the Low Voltage Directive 72/23/EEC and the
EMC Directive 89/336/EFC (including 93/68/EFC) and carries the CE Marking accordingly.
EMCStandard
IEC 61326-1:1997+A1:1998/EN
61326-1:1997+A1:1998
CISPR 11:1990 / EN 55011:1991
IEC 61000-4-2:1995+A1:1998 / EN
61000-4-2:1995
IEC 61000-4-3:1995 / EN 61000-4-3:1995
IEC 61000-4-4:1995 / EN 61000-4-4:1995
IEC 61000-4-5:1995 / EN 61000-4-5:1995
IEC 61000-4-6:1996 / EN 61000-4-6:1996
IEC 61000-4-11:1994 / EN
61000-4-11:1994
According to ISO/IEC Guide 22 and CEN/CENELEC EN45014
Manufacturer’s Name:Agilent Technologies UK Ltd.Agilent Technologies, Inc.
Manufacturer’s Address:
Electronic Products & Solutions
Group - Queensferry
South Queensferry
West Lothian, EH30 9TG
Scotland, United Kingdom
24001 E. Mission Avenue
Liberty Lake
Washington
99019-9599
USA
Declares, that the product
Product Name:
8960 Series 10 Wireless Communications Test Set
Model Number:E5515C
Product Options:This declaration covers all options of the above product.
Conforms with the following European Directives:
The product herewith compiles with the requirements of the Low Voltage Directive 72/23/EEC and the
EMC Directive 89/336/EFC (including 93/68/EFC) and carries the CE Marking accordingly.
EMCStandard
IEC 61326-1:1997+A1:1998/EN
61326:1997/A1:1998
CISPR 11:1990 / EN 55011:1991
IEC 61000-4-2:1995+A1:1998 / EN
61000-4-2:1995
IEC 61000-4-3:1995 / EN 61000-4-3:1995
IEC 61000-4-4:1995 / EN 61000-4-4:1995
IEC 61000-4-5:1995 / EN 61000-4-5:1995
IEC 61000-4-6:1996 / EN 61000-4-6:1996
IEC 61000-4-11:1994 / EN
61000-4-11:1994
According to ISO/IEC Guide 22 and CEN/CENELEC EN45014
Manufacturer’s Name:Agilent Technologies, Inc.
Manufacturer’s Address:
24001 E. Mission Avenue
Liberty Lake
Washington
99019-9599
USA
Declares, that the product
Product Name:
8960 Series 10 Wireless Communications Test Set
Model Number:E5515T
Product Options:This declaration covers all options of the above product.
Conforms with the following European Directives:
The product herewith compiles with the requirements of the Low Voltage Directive 72/23/EEC and the
EMC Directive 89/336/EFC (including 93/68/EFC) and carries the CE Marking accordingly.
EMCStandard
IEC 61326-1:1997+A1:1998/EN
61326-1:1997+A1:1998
CISPR 11:1990 / EN 55011:1991
IEC 61000-4-2:1995+A1:1998 / EN
61000-4-2:1995
IEC 61000-4-3:1995 / EN 61000-4-3:1995
IEC 61000-4-4:1995 / EN 61000-4-4:1995
IEC 61000-4-5:1995 / EN 61000-4-5:1995
IEC 61000-4-6:1996 / EN 61000-4-6:1996
IEC 61000-4-11:1994 / EN
61000-4-11:1994
The access probe power measurement is a channel power measurement (see “Channel Power Measurement
Description” ) triggered by a rise in RF power detected on the test set’s RF input. The pow er threshold is
approximately -55 dBm/BW.
Access probe sequences are transmitte d by the mobile station during registrations or mobile station originated
calls. Access prob e sequences con si st of a series of RF po w e r “steps” which increase in power according to the
step size setting until the maximum number of steps is reached or the call processing event completes, for
example when the call connects.
When the test set is making access probe power measurements in the continuous trigger arm state, it will
display the power level of the most recent access probe power measurement.
Considerations when making Access Probe Power measurements
IMPORTANTAccess probe power measurements must not be left in Continuous Trigger Ar m mode. Attempt ing
any other measurements while in this state will result in 4 dashes (----) .
The access probe measurement setup menu provides control over the following access probe parameters:
• Number of Steps in the access probe sequence (NUM_STEP in the standards).
• Power Step (PWR_S TEP in the standards). This parameter specifies the step increase in transmit power
between each access probe within an access probe sequence.
• Maximum Request Sequence (MAX_REQ_SEQ in the standards). This parameter specifies the maximum
number of acce ss probe sequence s fo r an ac c e ss ch a n n el request.
Changing the number of steps and s tep s ize wil l affec t the p ower l evel disp la yed if more t han on e acces s prob e
is transmitted by the mobile station. However, the number of access probes transmitted depends on whether
or not the test set responds by acknowledging the access request, thereby ending the access attempt. To
prevent the test set from responding to the access probe request, turn the Call Limit Mode feature On (key
F10 in Call Parms , 2 of 3 screen). For the GPIB command syntax, see “CALL:CONNected:LIMit[:STATe]” .
To measur e o nly the f irst acc ess p robe and p revent t riggering on subs eque nt acces s p robes, set Trigger Arm in
the Access Probe P ower Setup menu to Single and press the START SINGLE hardkey.
When the mobile station performs any type of registration, an access probe power measurement will likely be
triggered. Registrations can occur on mobile sta tion power-up, which is a function of the mobi le station’s
programming. Registrations may be requested by the test set at pre-determined time intervals, which will
periodically cause the access pro be power measurement to update . To control timer based registrations , access
the Registration Parameters menu (see “C. Set registration parameters.” ). For GPIB syntax information on
timer-based registrations, see “CALL:REGister” .
“Programming an Access Probe Power Measurement”
“CALL[:CELL]:APARameter”
“SETup:CAPPower”
“FETCh:CAPPower”
“INITiate”
“READ”
“ABORt”
“T est Adherence to Standards”
“Access Probe Power Troubleshooting”
“Channel Power Measurement Description”
Analog Transmit Power measures the mean power from the mobile at the test set’s RF IN/OUT port when
transmitting an analog carrier. The test set correctly measures the level with or without frequency modula tion
(FM) present to make AMPS power measurements. Tests can be made with the mobile in the analog test mode
or when connected on an active voice channel. See IS-137A, section 3.2.1.1, Analog RF Power.
The trigger source for this measurement i s always immediate.
Input Signal Requirements
The Analog Transmit Power measurement meets or exceeds specifications when the following requirements
are met:
• The frequency of the signal being measured must be in the range of 800 MHz to 960 MHz or 1.7 GHz to
2.0 GHz, and within 100 kHz of the expected frequency.
• The signal level into the test set’s RF IN/OUT connector must be in the range of - 25 dBm to +43 dBm peak,
and within 3 dBm of the expected input power to meet specifications. Results are provided for signals
within +5 dB to -10 dB of the expected power, but performance is not warranted.
See “Active Cell Operating Mode” on page 90, and “Receiver Control” on page 213 for information on setting
the expected input frequency and power level.
Considerations When Making Manual Analog Transmit Power Measurements
When manually controlling the test set from the front panel, all measurement s def ault to using continuous
triggering. If you make digital measurements on a DTC using RF Rise or Protocol triggering, and then hand
off to an AVC and select an analog measurement, the analog measurement may not trigger and display a
result. This is because the digital measurement is still waiting for a burst transmission to trigger it (which it
won’t get from an analog signal) and therefore the measurements “freeze”. To prevent this from happening
when making analog measurements, either turn off the digital measurements or set their tri gger source to
Immediate.
Related Topics
“Analog Transmit Power Troubleshooting” on page 725
“Programming an Analog Transmit Power Measurement” on page 170
“T est Adherence to Standards” on page 79
“Statistical Measurement Results” on page 238
“Triggering of Measurements” on page 240
“Timeouts” on page 239
The Audio Analyzer can measure Audio Level (V), SINAD (dB), Distortion (%), and Audio Frequency.
Measurements are made through the test set’s front panel AUDIO IN connectors. When measuring a mobile’s
audio output, the audio signal may come from either an acoustic coupler or from a test interface connection to
the mobile’s audio circuitry.
See “Audio Analyzer Block Diagram” on page 43.
The AUDIO IN connectors feed the inputs to a floating-input differential amplifier, with each input having an
impedance of about 100,000 ohms to c hass is ground. For best noise immunity, connect the audio signal and its
ground reference to the two input ports throug h shielded coaxial cables, or input the signal to the AUDIO IN
HI connector and ground the AUDIO IN LO connector’s center contact.
None of the analog audio measurement results are affected by the Amplitude Offset setting.
SINAD/Distortion State
Select On or Off to enable or disable the SINAD and Distorti on measure ments. When On, these measurement
results are displayed belo w the Audio Level measurement and the SINAD/Distortio n Fundamental F requency
must be entered to specify the audio fre quency for t he measurement (range: 100 Hz to 10 kHz). Whe n Off , four
dashes are displayed in place of the measurement results.
Audio Frequency State
Select On or Off to enable or disable the Audio Frequency measurement.
Filt er Type
• None - no filtering is provided (default).
• 100 Hz BW Band Pass Filter (Tunable) - The 100 Hz BW BPF Center Frequency setting is available when
this filter is selected, and can be set in the range of 300 Hz to 15 kHz.
• C-Message
• 50 Hz to 15 kHz
• 300 Hz to 15 kHz
Detector Type
Select either Peak or RMS (default) for making and displaying an Audio Level measurement (does not affect
other measurements). The type of detector s elected is displ aye d next to the Au dio Level measurement re sul ts.
A 1-volt rms sinewave input signal would measure 1.414 V
The Expected Amplitude sets the analog audio clipping level and must be set. This voltage is always the
absolute peak audio input signal voltage expected at the AUDIO IN connectors, and must be in the range of
7.07 mV
1.414 V
(5 mV
peak
expected voltage value to avoid clipping (over-driving) the input.
peak
) to 20 V
rms
. Remember, measuring a 1-volt rms sinewave input signal would require a
peak
De-Emphasis State
Set to On or Off (default) to enable or disable 750 microsecond de-emphasis.
Expandor Reference Level
Set value from 10 mV/kHz to 10 V/kHz, or Off (default). Entering a numeric value automatically turns the
state to On. Entering Off disables the expandor (s tate = off).
Trigger Source
Audio Analyzer measurements use immediate triggering and are continuously re-triggered by the analyzer
any time the Trigger Arm parameter is set to Continuous. Trigger timing is independent of any mobile
protocol signaling.
Considerations When Making Manual Audio Analyzer Measurements
When manually controlling the test set from the front panel, all measurement s def ault to using continuous
triggering. If you make digital measurements on a DTC using RF Rise or Protocol triggering, and then hand
off to an AVC and select an analog measurement, the analog measurement may not trigger and display a
result. This is because the digital measurement is still waiting for a burst transmission to trigger it (which it
won’t get from an analog signal) and therefore the measurements “freeze”. To prevent this from happening
when making analog measurements, either turn off the digital measurements or set their tri gger source to
Immediate.
“Audio Analyzer Block Diagram” on page 43
“AFANalyzer Troubleshooting” on page 726
“Audio Level Measurement Description” on page 45
“Audio Frequency Measurement Description” on page 44
“SINAD Measurement Description” on page 66
“Distortion Measurement Description” on page 54
“Programming an Audio Frequency Measurement” on page 174
“Programming an Audio Level Measurement” on page 172
“Programming a SINAD Measurement” on page 197
“Programming a Distortion Measurement” on page 184
“Statistical Measurement Results” on page 238 (Multi-measurements)
“Triggering of Measurements” on page 240
“Timeouts” on page 239
Considerations When Making Manual Audio Frequency Measurements
When manually controlling the test set from the front panel, all measurement s def ault to using continuous
triggering. If you make digital measurements on a DTC using RF Rise or Protocol triggering, and then hand
off to an AVC and select an analog measurement, the analog measurement may not trigger and display a
result. This is because the digital measurement is still waiting for a burst transmission to trigger it (which it
won’t get from an analog signal) and therefore the measurements “freeze”. To prevent this from happening
when making analog measurements, either turn off the digital measurements or set their tri gger source to
Immediate.
Related Topics
“Programming an Audio Frequency Measurement” on page 174
“Audio Analyzer Measurement Description” on page 40
“Audio Analyzer Block Diagram” on page 43
“AFANalyzer Troubleshooting” on page 726
Audio Level measures the AC voltage of the si gnal applied to t he front-panel AUDIO IN connectors, and is one
of the Audio Analyzer measurements. Audio Level can be measur ed for signals in the frequency range of
100 Hz to 20 kHz, at l evels from 1 mV
peak
to 20V
and can be made using an rms or peak detector. The type of detector being used for the measurement is
displayed next to th e measurement value.
When measuring very low voltages, it may be helpful to use the Audio Analyzer’s adjustable bandpass filter
and the rms detector to reduce noi se components.
For information on using the Audio Analyzer, see “Audio Analyzer Measurement Description” on page 40.
This measurement is not affected by the Amplitude Offset setting.
Considerations When Making Manual Audio Level Measurements
When manually controlling the test set from the front panel, all measurement s def ault to using continuous
triggering. If you make digital measurements on a DTC using RF Rise or Protocol triggering, and then hand
off to an AVC and select an analog measurement, the analog measurement may not trigger and display a
result. This is because the digital measurement is still waiting for a burst transmission to trigger it (which it
won’t get from an analog signal) and therefore the measurements “freeze”. To prevent this from happening
when making analog measurements, either turn off the digital measurements or set their tri gger source to
Immediate.
. The measurement is made after any filtering is applied,
peak
Related Topics
“Programming an Audio Level Measurement” on page 172
“AFANalyzer Troubleshooting” on page 726
“Audio Analyzer Measurement Description” on page 40
“Audio Analyzer Block Diagram” on page 43
Channel power measurements are made by analyzing a digitized version of the input signal’s downconverted
IF using the test set’s DSP (see “Block Diagram” ). Triggering occurs on the test set’s internal 20 ms frame
clock. The measurement is cross-calibrated with the detected average power to determine the absolute power
level.
Channel power measurements are limited to a 1.23 MHz bandwidth, and can be made on either power-gated
or non-power-gated input signals.
Channel Power Measurement Calibration
Channel power measurements are calibrated using the “CALibration:CPOWer?” command. Refer to
“CALibration Subsystem”for a description of channel power calibration.
Channel Power Measurement Speed
There are two channel power measurement speeds, fast and normal. See “SETup:CPOWer:MSPeed” for GPIB
command syntax.
Normal channel power measurements, like average power measurements, analyze a 10 millisecond sample of
the input signal, which is one-half of a CDMA frame. Since there is always at least one “on” power control
group in each half-frame the test set is able to “search” for and measure power during at leas t one “on” period .
Therefore, normal channel power measurements can be made when the mobile station is transmitting less
than full data rate, or is in one of the echo service options (mobile station is gating its output power according
to speech act i vi ty ).
Fast channel power measurements do not perform the search for “on” power control groups. Fast channel
power measurements only sample the input signal for 1.25 milliseconds, and are applicable only when the
input signal power is not power-gated. An example of a condition which would result in the mobile station
transmitting a non power-gated signal would be when the mobile station is in a loopback service option (on a
call or not) and is transmitting full-rate data.
Input Signal Requirements
The channel power measurement meets or exceeds specifications when the following input signal
requirem en ts are met:
• The frequency of the signal being measured must be within the range of 412 MHz to 483 MHz, 800 MHz to
960 MHz, or 1.7 GHz to 2.0 GHz, and be within 100 kHz of the expected frequency.
• The average power level of the signal at the RF IN/OUT connector must be between -61 dBm to +37 dBm.
The test set can autorange to a signal that is bet we en +8 dBm to -20 dBm of the exp ected level (see
Code Channel Timing and Phase Measurement Description
Code Channel Timing and Phase Measurement Description
How is a Code Channel Timing and Phase measurement made?
This measurement is designed to analyze signals that contain a rever se pilot channel. A call must be
connected with one of the following radio configurations selected:
• Fwd3, Rvs3
• Fwd4, Rvs3
• Fwd 5, Rvs4
Each code channel timing and phase measurement tests the time and phase alignment of each code channel
relative to the reverse channel pilot signal. The time erro r returns any offset, in nanoseconds, that is detected
between the coding of each Walsh channel and the reverse channel pilot. The phas e error measurement
determines whether there is any phas e difference , as sh own in Figure 1., that would cause a rotation in the I/Q
constellation away from the decision points.
Figure 1. I/Q Constellation Showing Phase Error
Code channel time/phase error measurements are made by sampling the down- converted input signal, then
applying DSP (Digital Signal Processing) techniq ues to determine the original data input to the mobile station
transmitter’s Walsh spreading function for each channel. The DSP then generates a representation of what
the “ideal” signal would be given the coding and data in use at the time of transmi ssion. The ide al wa veform is
then compared with the wavef orm being measured to determine code channel time error and phase error.
A Code Channel Time/Phase Error display is shown below.
The Code Channel measurement displa ys up to 16 bins1 of timing error information and 16 bins of phase e rror
information. Each bin represents one active code channel.
The IS-2000 system achieves high data rates by combining multiple code channels. To facilitate the display of
high data rate channels in contiguous blocks, the Walsh code sequence along the graph’s x-axis is displayed in
“bit reversed” order. See Table 3. “Walsh Numbering on Code Channel Timing and Phase Graphs”
The code channel sequence along the graph’s x-axis is displayed in “bit reve r s e d” order. See Table 3. “Walsh
Numbering on Code Channel Timing and Phase Graphs”
Table 3. Walsh Numbering on Code Channel Timing and Phase Graphs
Bin Number
(with
spreading
factors = 16)
Walsh Code
Channel
0123456789101112131415
0841221061419513311715
The timing and phase graphs, because of the bit-reversed order, can display channels with a spreading factor
less than 16, such as the R-SCH (Reverse Supplemental CHannel), using one bin.
For example, Figure 3. shows four active code channels displa yed in four bins . In b in four, Walsh code cha nnels
1, 3, 5, 7, 9, 1 1, 13, and 15 are a ll i ncl uded in a single c hannel. If t he Walsh numbering on the test set’s dis pla y
were sequential, the this channel would have to be displayed as eight bars, each separated by one Walsh code.
1. Bins are the bars that appear on the graph. When high data rate channels such as the F-SCH channel are transmitted from the
mobile station, wider bins are displayed. The wider bins represent code channels that occupy multiple orthogonal channels.
Code Channel Timing and Phase Measurement Description
Bin 4 - Walsh code 1
Spread Factor 2
An example of bit reversal is shown in Figure 4. Bin 13 has a binary coded decimal value of 1101. If you
reverse that sequence, the result is 1011. When 1011 is converted back to a decimal value, the result is Walsh
code 11.
Code Channel Timing and Phase Measurement Description
Figure 4. Walsh Channel Bit Reversal
Bin 13
=
Walsh 11
Measurement Behavior
Bin 0 corresponds with Walsh will always return zero for Time Error zero and phase error because all other
measurments are relative to the pilot channel, which is located at Walsh 0, bin 0.
Input Signal Requirements
The Code Channel Timing and Phase measurement meets or exceeds specifications when the following
requirem en ts are met:
• The frequency of the signal being measured must be in the range of 412 MHz to 483 MHz, 800 MHz to 960
MHz, or 1.7 GHz to 2.0 GHz, and within 100 kHz of the expected frequency.
• The signal level into the test set’s RF IN/OUT connector must be in the range of -25 dBm to +37 dBm, and
within 9 dBm of the expected input power (see “RFANalyzer:AUTO:POWer[:SELected]?” ) to meet
specifications.
Related Topics
“Programming a Code Channel Time/Phase Measurement”
“SETup:CCTPhase”
“FETCh:CCTPhase”
“INITiate”
“READ”
“ABORt”
“T est Adherence to Standards”
“Code Channel Time/Phase Error Measurement Troubleshooting”
Digital average power measurements are broadband power measurements made on the RF input before
frequency downconversion (see “Block Diagram” ). Digital average power measurements return the true rms
power level of the input signal. Triggering is handled by internal mechanisms and autoranging is us ed. No
external triggering is available.
The input waveform is det ected by a peak detector with sufficient AM bandwidth to track the instan taneous
power changes of a CDMA signal. Each measurement is made by analyzing a 10 milliseco nd period (one-h alf of
a frame) of the detected waveform.
The test set’s digital signal processo r (DSP) determines the true rms value of the si g n al. If the input signal is
power-gated, only the active power control groups will be measuremed.
This measurement uses autor anging based on the open loop p ower control resp onse of the mobile station t o set
up the receiver signal path attenuation.
Digital Average Power measurement characteristics
The digital average power measurement has greater than 2 GHZ bandwidth. For this reason, significant
signal energy outside the IS-2000 SR1 (1.25 MHz) signal bandwidth will incre ase the measured value.
This measurement can be made on signals that are power-gated or signals that are not power-gated. It is not
necessary to specify whether the input signal is power-gated.
Input Signal Requirements
The digital average power measurement meets or exceeds specifications when the following requirements are
met:
• The frequency of the signal being measured must be in the range of 412 MHz to 483 MHz, 800 MHz to 960
MHz, or 1.7 GHz to 2.0 GHz.
• The signal level into the test set’s RF IN/OUT connector must be between +37 dBm and -30 dBm. The test
set can autorange to a signal that is between +8 dBm to -20 dBm of the expected level (see
“RFANalyzer:AUTO:POWer[:SELected]?” ).
Related Topics
“READ? Subsystem”
“SETup:DAPower”
“INITiate”
“FETCh:DAPower”
“Channel Power Measurement Description”
“T est Adherence to Standards”
Distortion is an audio quality measurement that compare s the audio signal level fro m the mobile at a specifi ed
(desired) frequency to the level of signals present at other frequencies. The audio signals from the mobile are
typically demodulated tones sent over an analog voice channel (AVC).
The test set makes two measurements to determine distortion. First, the test set meas ures the total audio
signal level into the Audio Analyzer. Next, a precise notch filter is then used to remove the signal at the
specified frequency. The remaining signal level indicates the level of unwanted signals (distortion). Distortion
is expressed as a percentage of the total audio signal.
Distortion can be measured in the range of 100 Hz to 10 kHz. F or infor mation on using the Audio Analyzer, see
“Audio Analyzer Measurement Description” on page 40.
The distortion measurement can be us ed to perf orm the audi o harmonic di st orti on test. In this tes t, tw o audio
signals are used: a 1004 Hz tone and the 6000 Hz SAT. The 1004 Hz tone is notched out to make the
measurement. See IS-137A, section 2.2.2.5 for more information.
Considerations When Making Manual Distortion Measurements
When manually controlling the test set from the front panel, all measurement s def ault to using continuous
triggering. If you make digital measurements on a DTC using RF Rise or Protocol triggering, and then hand
off to an AVC and select an analog measurement, the analog measurement may not trigger and display a
result. This is because the digital measurement is still waiting for a burst transmission to trigger it (which it
won’t get from an analog signal) and therefore the measurements “freeze”. To prevent this from happening
when making analog measurements, either turn off the digital measurements or set their tri gger source to
Immediate.
Related Topics
“Audio Analyzer Measurement Description” on page 40
“AFANalyzer Troubleshooting” on page 726
“Programming a Distortion Measurement” on page 184
“T est Adherence to Standards” on page 79
How is an FER (frame error rate) measurement made?
FER measurements are used to test the performance of a mob ile station receiver.
During each FER measurement the test set sends a sequence of bits to the mobile station and the mobile
station attempts to demodulate and re-transmit the same bits back to the test set. The test set keeps a
running count of the measured frames and the number of frames that contained bit errors.
A call must be connected with a loopback service option selected (see “CALL[:CELL]:SOPTION” ) to perform
frame error rate measurements.
Intermediate measurement results are periodically available on the front panel display, but are not available
programmatically through the GPIB interface.
Confidence Level Description
Confidence level testing is a feature of FER measurements that applies s tatistical analysis to FER
measurements so that pass/fail test re su l t s ca n be ob tained in the sh or test possibl e ti me. When confid e n ce
level is on, the FER measurement will keep track of the number of frames measured, the number of frame
errors, and perform a statistical analysis of the probability that the value entered in the FER requirement
field will (or will not) be exceeded.
The confidence level parameter is typically set at 95 p ercent. Each FER measurem ent will return a P ass result
before the maximum frame count is reached if statistically there is a 95 percent probability that the
percentage of frame errors would not exceed the FER requirement value if the measureme nt were allowed to
reach the maximum frame count. The FER measurement will return a Fail result before the maximum frame
count is reached if statistically there is a 95 percent probability that the percentage of frame errors counted
would exceed the FER requirement if the measurement were allowed to reach the maximum frame count. If
confidence level is off, or the number of frame errors counted did not result in a pass or a fail result, max
frames will be returned and the measurement result will be the FER percentage.
Several hundred frames of data must be measured before confidence limit checking can begin. A speed-up
feature, which is always active, allows the test s et to end an FER measurement before reaching the minimum
number of frames required to apply confidence limit chec k ing. The speed-up feature calculates a maximum
value of frame errors allowed before confidence limit c hecking begins, and ends the FER measurement with a
fail indication if this limit is exceeded.
Input Signal Requirements
The FER measurement meets or exceeds specifications when the following requirements are met:
• The frequency of the signal being measured must be in the range of 412 MHz to 483 MHz, 800 MHz to 960
MHz, or 1.7 GHz to 2.0 GHz, and within 100 kHz of the expected frequency.
• The signal level into the test set’s RF IN/OUT connector must be in the range of -25 dBm to +37 dBm, and
within 9 dBm of the expected input power (see “RFANalyzer:AUTO:POWer[:SELected]?” to meet
specifications.
The Analog Frequency Modulation measurement measures the frequency deviation and, if enabled, the total
harmonic distortion and modulation frequency, for frequency modulated analog signals (such as AMPS
transmitters). Measurements are performed after any filtering, de-emphasis, and expansion are performed
(selected by the user in the setup parame ters).
The distortion value is not returned if the Distortion State is set to OFF. The modulation frequency value is
not returned if the Modulation Frequency State is set to OFF.
The FM deviation and distortion measurements are not affec ted by a static (constant) frequency error on the
input signal as long as the input signal is within 2.5 kHz of the expected frequency.
This measurement is not used for digital signals .
Refer to IS-137, 3.3.1, for more information on measuring analog modulation characteristics.
Triggering
Triggering is always immed iate for this measurement. Trigger Delay and other trigger sources are not use d.
Considerations When Making Manual FM Measurements
When manually controlling the test set from the front panel, all measurement s def ault to using continuous
triggering. If you make digital measurements on a DTC using RF Rise or Protocol triggering, and then hand
off to an AVC and select an analog measurement, the analog measurement may not trigger and display a
result. This is because the digital measurement is still waiting for a burst transmission to trigger it (which it
won’t get from an analog signal) and therefore the measurements “freeze”. To prevent this from happening
when making analog measurements, either turn off the digital measurements or set their tri gger source to
Immediate.
Distortion State and Distortion Fundamental Frequency Operation
The Distortion Fundamental Frequency value specifi es the demod ulated audio freq uency to use when making
a distortion measurement, and must be entered to make a valid measurement. However, specifying the
fundamental frequency does not affect the measur ement state. The Distortion State must be turned On
separately to make the measurement.
Modulation Frequency State
The modulation frequency measurement is enabled and disabled using the Mod Freq State setting. The
modulation frequency measurement is made after any filtering is applied, and can be used to make
measurements such as SAT frequency.
The following filters are available to make measurements on the demodulat ed FM (baseband) signal.
• None - no filtering is provided (default).
• 100 Hz BW Band Pass Filter (Tunable) - The 100 Hz BW BPF Center Frequency setting is available when
this filter is selected, and can be set in the range of 300 Hz to 15 kHz.
• C-Message
• 50 Hz to 15 kHz
• 300 Hz to 15 kHz
Detector Type
Select the type of detector to use when making FM deviation measurements: RMS, Peak+, Peak-. The Peak+
and Peak- det ect ors me asure th e gre atest po sit ive o r n egative fr equenc y excur sion i n carrie r f req uency during
the sample. The RMS detector measures the root mean squared value. This setting does not affect the
distortion measurement.
De-emphasis State
Select On or Off to enable or disable (respectively) 750 µs de-emphasis.
Expandor State
Select On to compensate for signal compression on the mobile’s transmitted signal.
Related Topics
“Programming a Frequency Modulation (FM) Measurement” on page 189
“Frequency Modulation (FM) Troubleshooting” on page 732
“Statistical Measurement Results” on page 238
“Timeouts” on page 239
“Triggering of Measurements” on page 240
“T est Adherence to Standards” on page 79
The Frequency Stability measurement measures the transmitter frequency and frequency error of analog
signals (including AMPS) with a 1 Hz resolution. Frequency Error is determined by comparing the frequency
of the measured signal to the expected frequency. These parameters are determined by the receiver control
settings (see “Manual Receiver Control Parameters” on page 213).
Operating Considerations
This measurement is performed with the test set’s CW operating mode (see “CALL[:CELL]:OPERating” ).
This measurement is not used for digital signals .
For the bes t accuracy, connect the timebas e of the sig nal so urce with t he test set’s timebase. See “10 MHZ REF
IN” on page 713 and “10 MHZ REF OUT” on page 713.
Input Signal Requirements
The received signal’s freque ncy must be within the interval 293 MHz to 2.7 GHz and be within 200 kHz of the
expected frequency. See “Measurement receiver frequency” on page 214.
The power level of the signal source must be between -30 to +43 dBM and be within 3 dB of the expe cted
power. See “CW receiver power” on page 213.
If the received signal has FM, the modulation index must be no greater than three and the modulation
frequency must be between 100 Hz and 15 kHz.
Worst Case Frequency Error
Frequency and Frequency Error measurement results are returned over GPIB in units of Hz. Worst Case
Frequency Error, the greatest error measured during the total sample( s), is retu rned in units of ppm (parts pe r
million). Worst Case Frequency error is only displayed on the test set’s display when multi-measurements are
used, but is always available via GPIB (regardless of the multi-measurement state).
Triggering
Triggering is always immed iate for this measurement. Trigger Delay and other trigger sources are not use d.
Related Topics
“READ? Subsystem”
“SETup:FSTability”
“INITiate”
“FETCh:FSTability”
“Receiver Control”
“T est Adherence to Standards”
Gated power measurements provide a graphical representation of the time response of the mobile station
average transmitter power during periods when the power is gated on. During power gated transmission,
power from the mobile station is deliv ered in burs ts. A measurement mask delineates the boundaries th at the
signal’s amplitude trace must conform to.
Four views of the power versus time graph are available after the test set analyzes measurement data. The
resolution of the traces has been designed to provid e detail at the most critical points in the trace. There are
four views available:
• Rise
• Fall
• Full
• Zoomed
The Rise (part of Rise/Fall) trace details the rising edge of the burst, from -15 uS to +10 uS relative to the
beginning of the burst. The beginning of the burst corresponds with the gated-on power control group clock
1
.
edge
The F all (part of Rise/Fall) trace details the falling edge of the burst, from 1237 to 1262 uS after th e beginning
of the burst.
The Full (part of Full/Zoomed) trace encompas ses t he enti re burst with decr eased re sol ution. This trace spans
the time perio d from -15 uS to 1 26 2 u S re l a tive the the beg i n n i n g of th e b u rst.
The Zoomed (part of Full/Zoomed) trace details the area highlighte d by a vertical bar displayed on the Full
trace. This vertical bar can be positioned in any one of 14 locations alo ng the entire length of the zoomed burst.
(The extreme left and right vertical bar positions encompass the Rise/Fall time periods.)
A marker displaying the power level (from +10 to -45 dB) at each time increment is provided for all traces
except for Full. If a gated power measurement fails , the marker will be automatically positioned at the first
fail point.
A measurement progress report, showing the number of mea sur eme n ts in a multi-measurement, is displayed
on the test set’s screen in an “n/m” format. The number of measurements completed, n, increases from zero to
the total number of measurements which need to be made, m.
1. Traffic channel frames are subdivided into 16 1.25 mS segmen ts, called power control groups . When
the traffic data rate is set to half, quarter, or eighth, the mobile station transmits only during
randomly se lected powe r co n trol groups. These are referred to as “gated-on” power control groups.
Each gated power measurement is triggered internally by the test set. During the gated power measurement,
a DSP (Digital Signal Processor) samples the signal and returns 5,625 amplitude versus time data points.
Data points return power levels, relative to the average power during the mid dle of the burs t, that co rre spond
with time intervals before, during, and after the burst.
The gated power measurement analyzes the rising and falling edges of the burst to determine where the -3 dB
points are. Using the -3 d B points t o det ermine t he center of t he burst, the test s et posi tions the measur ement
mask (green lines on the display) to align in time with the center of the burst.
Since the middle portion of the burst is compres sed in time, the scaling is different when compared to the
rising or falling portions. The following formulas can be used to calculate the time associated with each data
point from 0 to 5,264 as returned by the “FETCh:GPOWer:TRACe?” command:
Equation 1. Time Association For Data Points 0 through 370
t1p222–()×
where t1 is the sampling period for each data point, and p is the data point of interest (from 0 to 5,264).
t11 12 1.2288 106××()⁄67.82nS≈=
Equation 2. Time Association For Data Points 371 throu gh 4893
4t1p2667–()8÷()××
where t1 is the sampling period for each data point, and p is the data point of interest (from 0 to 5,264).
t11 12 1.2288 106××()⁄67.82nS≈=
Equation 3. Time Association For Data Points 4894 through 5264
t1p13347+()×
where t1 is the sampling period for each data point, and p is the data point of interest (from 0 to 5,264).
t11 12 1.2288 106××()⁄67.82nS≈=
NOTEData point 222 corresponds with time 0 on the gated power graph.
On the test set’s display, data points are graphed as follows:
• For the rising trace, data points 0 through 370 (the first 371) are displayed with each data point occupying
one display pixel.
• For the falling trace, data points 4894 through 5264 (the last 371) are displayed with each data point
occupying one display pixel .
• For th e Full/Zoomed tr ace sp anning t he entir e 1277 uS measureme nt peri od, a veragi ng over groups of data
points will be performed to include all 5,264 data points using the display’s 371 pixels.
• For the Full/Zo omed tr ace that zoo ms in on the area highlighted by the ver tical bar, the correlation between
data points an d pi xe l s is as follows:
— For the first or last zoomed segment the correlation between data points and display pixels will be
identical to the Rise/Fall traces, with the first or last 371 data points displayed on 371 pixels.
— For all of the middle 12 zoomed segments, the time period (when compared with rise/ fall graphs) will be
compressed in time. Each data point will span a time period four times longer than the rise/fall data
points. This will result in about one fourth the dis play resolution when compared with the rise/fall
traces.
Table 4. Graticule Line Labeling for all Zoomed Traces
Zoom
Position
00-370371-15-10-50510
1371 to 7473771031517192112
2748 to 112437711213315317419 4214
31125 to 1501377215235255276296317
41502 to 1878377317337358378399419
51879 to 2255377419440460480501521
62256 to 2632377521542562583603623
72633 to 3008376624644664685705726
83009 to 3385377726746767787808828
93386 to 3762377828849869889910930
103763 to 413937793095197199210121032
114140 to 4516377103310531073109411141135
DSP Output
Range (points)
Count of
Data
Points
µ s
Graticule
Line 0
µ s
Graticule
Line 2
µ s
Graticule
Line 4
µ s
Graticule
Line 6
µ s
Graticule
Line 8
µ s
Graticule
Line 10
124517 to 4893377113511551176119612161237
134894 to 5264371123712421247125212571262
Gated Power measurem ents can not be made concurrently with any other measurement, and no other
measurement can be made while a gated power measurement is in progress.
The pass/fail result indicates whether or not the trace conformed to the mask.
To make the test run faster, reduce the number of averages (multi-measurement count). The default is 100.
Most failures occur during the rising or falling portions of the burst.
Gated power measurements are exp ressed in dB, relative to the average of the power lev els across th e number
of 1.25 mS burst specified in the multi-measurement count.
Measurement Requirements
Setup:
The following settings are required for the gated power measurement:
• Operating Mode must be Active Cell
• System Type must be IS-95 or IS-2000 with Radio Config set to (Fwd1, Rvs1) or (Fwd2, Rvs2)
• FCH Service Option Setup must be set to SO2 or SO9 (loopback service opt ion)
• Traffic Data Rate must be set to Eighth.
Input Signal:
The gated power measurement meets or exceeds specifications when the following input signal requirements
are met:
• The frequency of the signal being measured must be within the range of 411 MHz to 484 MHz, 804 MHz to
934 MHz, 1.75 GHz to 1.78 GHz, or 1.85 GHz to 1.98 GHz,and be within 100 kHz of the expected
frequency.
• The average power level of the signal at the RF IN/OUT connector must be between -20 dBm to +30 dBm.
The test set can autorange to a signal that is bet we en +8 dBm to -20 dBm of the exp ected level (see
“RFANalyzer:AUTO:POWer[:SELected]?” ).
Related Topics
“Programming a Gated Power Measurement”
“SETup:GPOWer”
“FETCh:GPOWer”
“INITiate”
“READ”
“ABORt”
“T est Adherence to Standards”
“Gated Power Measurement Troubleshooting”
How is a Handoff Waveform Quality measurement made?
Handoff waveform quality measurements test a transmitter’s modulation accuracy during transmission of a
single code channel, the reverse Pilot Channel. The handoff invol ves changing the current pn (pseudo-noise)
offset to force the mobile station to transmit a preamble on the Pilot Channel only. Reverse link power control
is changed to alternating up/down bits and waveform quality is measured. After the measurement, the pn
offset is returned to the original setting and the power control is returned to the original setting.
Each handoff waveform quali ty measurement returns a number of measurements which include rho, the
percentage of signal energy that correlates with a perfect IS-2000 signal after time offset and frequency error
have been removed.
This measurement is designed to analyze signals that are made up of multiple code ch annels, as in the case of
radio configurations three and above.
Waveform quality measurements are made by sampling the down-converted input signal, then applyi ng DSP
(Digital Signal Processing) techniques to determine the original data input to the mobile station transmitter’s
Walsh spreading function for each channel. The DSP then genera tes a representation of what the “ideal”
signal would be given the coding and data in use at the time of transmission. The ideal wavefor m is then
compared with the waveform being measured to determine the waveform quality.
Table 5. lists the Handoff W a veform Quality measurements:
Table 5. Handoff Waveform Qu al i t y m ea s urement re s ults
The following settings are required for the handoff w aveform quality measurement:
• Operating Mode must be Active Cell
• System Type must be IS-2000 with Radio Config set to (Fwd3, Rvs3) or (Fwd4, Rvs3)
• A call must be connected
Input Signal:
The handoff waveform quality measurement meets or exceeds specifications when the following input signal
requirem en ts are met:
• The frequency of the signal being measured must be in the range of 412 MHz to 483 MHz, 800 MHz to 960
MHz, or 1.7 GHz to 2.0 GHz, and within 100 kHz of the expected frequency.
• The signal level into the test set’s RF IN/OUT connector must be in the range of -25 dBm to +37 dBm, and
within 9 dBm of the expected input power (see “RFANalyzer:AUTO:POWer[:SELected]?” ) to meet
specifications.
Related Topics
“Programming a Handoff Waveform Quality Measurement”
“SETup:HWQuality”
“FETCh:HWQuality”
“INITiate”
“READ”
“ABORt”
“T est Adherence to Standards”
“Handoff Waveform Quality Measurement Troubleshooting”
SINAD is a receiver audio quality measur ement for mobiles on a n analog voice c hannel (AVC). It is the ratio of
Signal+Noise+Distortion divided by Noise+Distortion, expressed in dB . SINAD is measured using the test
set’s Audio Analyzer. SINAD can be measured in the range of 100 Hz to 10 kHz. For information on using the
Audio Analyzer, see “Audio Analyzer Measurement Description” on page 40.
The SINAD measurement is used to determine receiver RF sensitivity. SINAD is usually measured either of
two ways:
• Reduce the Cell Po we r from the test set until 12 dB SINAD is displayed (re-t rig gering for each
measurement), or
• Set the Cell Power from the test set to a specified low level and verify a
See IS-137A, section 2.3.1.1, for more info rmation.
Difference in Agilent 8960 Series 10 and 8920B Test Set SINAD Measurements
If you have previously used the Agilent 8920B RF Communications Test Set to measure SINAD, you may
notice that the Agilent 896 0 Series 10 test set’s SINAD value may be lower by up to 0.8 dB when measuring 12
dB SINAD. This is due to the more prec ise digital notc h filter us ed by the 8960, caus ing a more accurate noi se
measurement to be made. The 8920B uses an analog filter that does not ha ve as tight a filter notch as the
8960.
≥12 dB SINAD reading.
Considerations When Making Manual SINAD Measurements
When manually controlling the test set from the front panel, all measurement s def ault to using continuous
triggering. If you make digital measurements on a DTC using RF Rise or Protocol triggering, and then hand
off to an AVC and select an analog measurement, the analog measurement may not trigger and display a
result. This is because the digital measurement is still waiting for a burst transmission to trigger it (which it
won’t get from an analog signal) and therefore the measurements “freeze”. To prevent this from happening
when making analog measurements, either turn off the digital measurements or set their tri gger source to
Immediate.
Related Topics
“Programming a SINAD Measurement” on page 197
“AFANalyzer Troubleshooting” on page 726
“Audio Analyzer Measurement Description” on page 40
“T est Adherence to Standards” on page 79
Swept audio measurements synchronize the frequencies of the test set’s audio generator and audio analyzer
instruments to automatically make measurements at up to 60 frequency points. Audio level, SINAD, and
distortion measurements can be performed at each measurement point in the sweep.
This measurement only generates and analyzes audio signals; no modulation of the RF generator , or
demodulation by the receiver, is performed. A representation of this operation is shown below.
Figure 5.Swept Audio Measurements Block Diagram
Audio Generator
Instrument
Level
Shared Controls
(These contro ls affect
both instruments when
making swept audio
measurements.)
Start Frequency
Stop Frequency
Audio Analyzer Instrument
SINAD Measurement
Distortion Measurement
Detector Type
Peak
RMS
Filter Type
Audio Level
Measurement
Number of Points
Device Settling Time
Coupling
Expected Peak Voltage
Audio
In
AUDIO
OUT
(DC)(AC)
HighLow
Device Under
Test
The audio generator’s signal is output through the front panel AUDI O OUT port to the device under test. The
audio signal from the device under test is sent to the audio analyzer through the AUDIO IN ports.
The start and stop frequencies for the sweep define the frequency range. The user specifies the number of
measurement points, which are evenly spaced through the specified frequency range.
Measureme n t se ttling time can be se t to specify how lon g th e au dio signal is gen e ra ted at each freq u ency
before a measurement is made by the audio analyzer. This is used to account for settling time in the device
being tested and any signal delay through the device. Increasing the settling time increases the sweep time.
If the 100 Hz BW bandpass filter is selected, the center frequency of the filter is synchronized to the audio
generator and audio analyzer frequencies.
Typical applications include measuring the audio distortion of a mobil e station across several frequencies and
measuring the frequency response of an audio filter or amplifi er.
This is not a measurement procedure specified in the EIA/TIA standar ds.
Operating Considerations
Front Panel Access Swept Audio measurements are accessed manually by pressing the front-panel
Instrument selection key.
Mutli-measurement Use When multi-measurements are used with the swept audio measurement, the AF
analyzer makes the number of measurements specified at each point in the sweep. F or example, if five
measurement points are specified, and the multi-measurement count is set to 20, a total of 100 measurements
are performe d du r i n g th e sw ee p.
Interactions with the Audio Analyzer and Audio Generator Instruments The Swept Audio
measurement and the Audio Analyzer instrument cannot be used at the same time to make audio
measurements. If you enable either funct i on while the other function is already enabled, the first function is
turned off and a message is displayed that informs you of this situation.
The amplitude of the Audio Generator instrument can be changed while the Swep t Au dio measurement is
enabled. However, trying to change the Audio Generator instrument’s frequency while using swept audio
measurements is not allowed, and causes an error message to be displayed.
Specifying a Specific Measurement Frequency Point Within a Sweep If you need to make sure that a
measurement is performed at a specific frequency within the sweep, you can use the following algorithms to
calculate the values to enter:
To find which point in the sweep (n) corresponds to the frequency you want the sweep to make a
measurement at (F), use the following algorithm -
FS–()P1–()
n1INT
S = sweep start frequency, P = number of measurement p oints t o ma ke i n the sweep, F = specific frequency
to make a measurement at during the sweep, n = measurement point corresponding to F,
Emin = minimum upper sweep frequency
INT= the largest integer value that is less than or equal to the expression in parenthesis. For example, if
the value of the expression is 3.65037, the integer value is 3.0; the value of n would therefore be 4.
To determine the actual stop frequency (E) to enter, use the following algorithm -
For example if you wanted to make a measurement at 1004 Hz (F) during a sweep of 15 points (P) that begins
at 300 Hz (S) and ends after 3 kHz (Emin), the first alg orithm te lls you that 10 04 Hz occurs at the fou rth point
in the sweep (n). Use the second algorithm to calculate the actual stop frequency (E) you would enter for that
sweep (3585.333 Hz).
“Programming a Swept Audio Measurement” on page 199
“Swept Audio Measurement Troubleshooting” on page 737
“Audio Analyzer Measurement Description” on page 40
“Audio Level Measurement Description” on page 45
“Distortion Measurement Description” on page 54
“SINAD Measurement Description” on page 66
“T est Adherence to Standards” on page 79
What is a TDSO (Test Data Service Option) FER (Frame Error Rate) measurement?
TDSO FER measurements are used to test the performance of a mobile station receiver while a supplemental
(high speed da ta) channel is co n n ected and TDSO (Service Option 32) is sel ected.
This measurement provides a report fro m the mobile station indicating the status of traffic frames received
during high speed data transfer on the F-SCH (forward supplemental channel).
NOTEAt firmware revision B.03 a new TDSO service option was introduced. When a call is made with
this service option, SO32 (+ SCH), the supp lem ental channel is transmitted on both the forward
and reverse links. TDSO FER measurements, however, are made only on the forward
supplemental channel.
Since the measurement values displayed are obtained from the mobile station, there are no
multi-measurement results availabl e, such as measurement averaging.
How is a TDSO FER Measurement Made?
The test set attempts a TDSO FER measurement when a call is connected using Service Options SO32
(+F-SCH) or SO32 (+ SCH). See “CALL[:CELL]:SOPTION” .
See “CALL[:CELL]:SOPTION” . To establish a call with Service Option 32 you must select Radio Config
(Fwd3, Rvs3) or Radio Config (Fwd4, Rvs3). A mobile station originated call can be made or you can pre ss the
Originate Call (F3) key. A TDSO FER display is shown below in Figure 6. with 512 frames selected.
The time period required for TDSO FER measurements depends on the timing of the call connection.
All traffic channels, including the F-SCH, are subdivided into segments of 10.24 seconds each. Testing begins
when the first frame (called a sync frame) of the first full segment is received by the mobile station. For
example, Figure 7. shows two full F-SCH segments. In this example, the SO 32 call is connected half way
through the first segment. Appro ximately 5.12 s later the mo bile station receives the first sync frame from the
test set and computes the PRBS data patte rn the test set is about to send.
The time period between the successful negotiation of a SO32 connection and the start of the FER Count
Period is bas ed on the current long code state, and will range from 0 seconds to 10.24 seconds.
The mobile station also resets its frame counters upon receiving the first sync frame.
Figure 7. TDSO FER With Frame Count Set to 512 Frames
10.24 s
512 20 ms Frames
5.12 s
10.24 s
512 20 ms Frames
FER Count Period
SO 32 Selected
First sync frame-
mobile station begins
counting frames
Second sync frame-
mobile station returns
frame counter data
During the second sync frame interval, the mobile station keeps a running co unt of:
• Good Fram es Received
• Bad Frames Received
• Blank Frames Received
• Bad Frames Instead of Blank Frames Received
• Tot al Bad Frames Received
Also during the second frame interval, the test set keeps a running count of:
• Good Frames Transmitted
• Blank Frames Transmitted
At the end of the second frame interval, the tes t set retrieves frame count data from the mobile station and
A call must be setup using SO32 (+ F-SCH) or SO32 (+ SCH) and that call must be currently connec ted to make
TDSO FER measurements.
IMPORTANTPRBS data must be selected on the forward sup plemental channel if you are making any type of
code domain measurement on the reverse supplemental channel.
The F-SCH Parameters menu allows for the selection of PRBS or Fixed Pattern in the Data Source field. This
choice is also applied to the reverse supplemental channel (see “Configuring the R-SCH (Reverse
Supplemental Channel)” . T o c orrectly det ect reverse sup plemental code c hannel parameters , PRBS is the only
data source supported. If PRBS data is not selected, the code domain power results (see “Waveform
Quality/Code Domain Measurement Description” ) will not display distinct code channels with the expected
spreading factors.
When PRBS is se l e ct e d in th e D a ta So u rce field, code domain power re su l ts will not be cor r ec t until after th e
first sync frame occurs ( see “How is a TDSO FER Measurement Made?” ).
The measurement setup menu allows for specifying the FER confidence requirement. The FER confidence
requirement establishes a target FER rate. To meet standard minimum specifications, a specified FER
percentage must be attained with a confidence leve l of 95%. The TDSO FER measurement returns the
confidence level based on the actual average FER result obtained over the fixed frame count length. If the
confidence level is less than 95% for the specified FER confidence requirement, the test has not passed
minimum standards.
The supplemental channel information menu provides channel setup parameters including the supplemental
channel data rate, enco der type, and power level. Standards specify data rates and Eb/Nt. Eb/N t can be set by
adjusting F-SCH and AWGN level.
If trigger arm is set to Single, the first TDSO FER measurement will be displayed and then the test set will
wait until it is t riggered by a GPIB command or the START SINGLE key before the next sync frame is staged.
If “No F-SCH” is displayed in the bottom right po rtion of the display, the supplemental channel is not
connected. If “No Sync” is displayed, the sync channel has not been sent to the mobile stati on yet.
Interim results are displayed when the frame count is greater than 512 and the test set is able to retrieve
mobile station counter values after intermediate sync frames.
Integrity indicators (see “Integrity Indicator” ) do not apply to this measurement.
For cellular frequency bands, and NMT 450, the Tx spurious emission s me asurement analyzes the signal
energy at the following frequency offsets relative to the channel’s center frequency:
• ±885 kHz (lower and upper adjacent channels)
• ±1.98 MHz (lower and upper alternate channels)
For PCS frequency bands the Tx spurious emissions measurement analyzes the signal energy at the following
frequency offsets relative to the channel’s center frequency:
• ±1.25 MHz (lower and upper adjacent channels)
• ±1.98 MHz (lower and upper alternate channels)
The relative signal energy (dBc) is measured within a 30 kHz bandwidth.
A graphical view or a numeric view can be displayed.
Tx Spurious Emissions measurements are triggered by a 20 ms clock derived from signaling protocol.
Tx Spurious Emissions measurement characteristics
Tx Spurious Emissions measurements are usuall y made with t he mobil e statio n transmit ting at its fu ll powe r
(traffic channel and fundamental channel control is available in the measurement setup menu).
Limit lines are shown on the graphical dis pla y. These lines are set based on the cur rent Cell Band se lection. If
the signal energy exceeds a limit line the word Fail appears on the display.
The x-axis on the graphical display is fixed to -2.5 MHz to 2.5 MHz
The y-axis on the graphical display is fixed to 0 dBc/30 kHz to -70 dBc/30 kHz.
A marker is provided to display measurement levels at each offset frequency.
An overall pass/fail indicator is available via GPIB commands (see “FETCh:CTXSpurious[:ALL]?” )
Input Signal Requirements
The Tx Spurious Emissions measurement meets or exceeds specifications when the following requirements
are met:
• The frequency of the signal being measured must be in the range of 411 MHz to 484 MHz, 804 MHz to 934
MHz, 1.75 GHz to 1.78 GHz, or 1.85 GHz to 1.98 GHz, and be within 100 kHz of the expected frequency.
• The signal level into the test set’s RF IN/OUT connector must be in the range of 0 dBm to +30 dBm, and
within 9 dBm of the expected input power (see “RFANalyzer:AUTO:POWer[:SELected]?” ) to meet
specifications.
Waveform Quality/Code Domai n Measurement Description
How is a Waveform Quality/Code Domain Power measurement made?
Each waveform waveform quality measurement returns a number of measurements whi ch includes:
• Rho, the percentage of signal energy that correlates with a perfect IS-2000 signal after time offset and
frequency error have been removed
• Code domain power, the power levels of each code channel tran smitted by the mobile station.
• Code domain p o w e r a n d n oi se, the total of po wer and noise of ea ch code channel tr a n smitted by the m o bile
station.
This measurement is designed to analyze signals that may be made up of multiple code channels. Multiple
code channels are used in calls setup usi ng radio configurations three (Fwd3, Rvs3) and above . Any time a call
is connected, wavefor m qualit y measurements can be made. Any combination of service option, radio
configuration, or data rate can be measured.
Waveform quality measurements are made by sampling the down-converted input signal, then applyi ng DSP
(Digital Signal Processing) techniques to determine the original data input to the mobile station transmitter’s
Walsh spreading function for each channel. The DSP then genera tes a representation of what the “ideal”
signal would be given the coding and data in use at the time of transmission. The ideal wavefor m is then
compared with the waveform being measured to determine the waveform quality.
Table 6. “Waveform Quality/Code Domain Power Measurement Results” lists the Waveform Quality/Code
Domain Power measurements:
Table 6. Waveform Quality/Code Domain Power Measurement Results
Waveform QualityCode Domain Power
RhoCode Domain Power (I-Channel)
Frequency ErrorCode Domain Power (Q-Channel)
Timing ErrorCode Domain Po wer + Noise (I-Channel)
Carrier FeedthroughCode Domain Power + Noise (Q-Channel)
Phase Error
Magnitude Error
Error Vector Magnitude (EVM)
The Code Domain Power measurement displays up to 16 I-channel and up to 16 Q-channel bins1. Each bin
represents one active code channel. The IS-2000 system achieves high data rates by combining multiple code
channels. To facilitate the display of high data rate channels in contiguous blocks, the Walsh code sequence
along the graph’s x-axis is displayed in “bit reversed” order. See Table 7. “Walsh Numbering on Code Domain
Power Graphs”
To facilitate the display of measurement results in contiguous blocks the Walsh code sequence along the
graph’s x-axis is displayed in “bit reversed” order. See Table 7. “Walsh Numbering on Code Domain Power
Graphs”
Table 7. Walsh Numbering on Code Domain Power Graphs
Bin Number0123456789101112131415
Walsh Code
Channel
0841221061419513311715
The power and power + noise graphs, because of the bit-reversed order, can display channels with a spreading
factor of less than 16, such as the R-SCH (Reverse Supplemental CHannel), using one bin. For example,
Figure 8. sh o ws th e Q chann e l with :
• the R-FCH (Reverse Fundamental CHannel) in bin 1 on channel 4,
• the R-SCH in bin 2 on channel 1 (composed of channels 1, 9, 5, 13),
Figure 8.Code Domain Power Graph with R-SCH
An example of bit reversal is shown in Figure 9. Bin 13 has a binary coded decimal value of 1101. If you
reverse that sequence, the result is 1011. When 1011 is converted back to a decimal value, the result is Walsh
code 11.
1. Bins are the bars that appear on the graph. When high data rate channels such as the F-SCH channel are transmitted from the
mobile station, wider bins are displayed. The wider bins represent code channels that occupy multiple orthogonal channels.
The Waveform Quality measurement meets or exceeds specifications when the following requirements are
met:
• The frequency of the signal being measured must be in the range of 412 MHz to 483 MHz, 800 MHz to 960
MHz, or 1.7 GHz to 2.0 GHz, and within 100 kHz of the expected frequency.
• The signal level into the test set’s RF IN/OUT connector must be in the range of -25 dBm to +37 dBm, and
within 9 dBm of the expected input power (see “RFANalyzer:AUTO:POWer[:SELected]?” ) to meet
specifications.
IMPORTANTPRBS data is required if you are making any of the code domain measurements on the reverse
supplemental channel
The F-SCH Parameters menu allows for the selection of PRBS or Fixed Pattern in the Data Source field. This
choice is also applied to the reverse supplemental channel. See “Configuring the F-SCH (Forward
Supplemental Channel)” . T o c orrectly det ect reverse sup plemental code c hannel parameters , PRBS is the only
data source supported. If PRBS data is not selected, the code domain power results will not display distinct
code channels with the expecte d spreading factors.
Related Topics
“READ? Subsystem”
“SETup:WQUality”
“INITiate”
“FETCh:WQUality”
“T est Adherence to Standards”
3.3.6.2.2 Spreading Rate 1 Forward Common Power
Control Channel and Common Assignment Channel
with Rate = 1/2
3.3.6.2.3 Spreading Rate 1 Forward Common Power
Control Channel and Common Assignment Channel
with Rate = 1/2
3.4.1 Demodulation of Forward Traffic Channel with
AWGN
3.4.2 Demodulation of Forward Traffic Channel with
Fading
3.4.3 Demodulation of Forward Traffic Channel During
Soft Handoff
3.4.4 Decision of Power Control Bit for Channels
Belonging to Different Power Control Sets During Soft
Handoff - Test 1 and Test 2
3.4.5 Decision of Power Control Bit for Channels
Belonging to the Same Power Control Set
No. Possible future enhancement.
No. Possible future enhancement.
Yes,
For F-FCH , the test set uses loopback Service Options 002,
009, or 055
For F-SCH, the test set uses Test Data Service Option
(S032)
Yes, requires an external fader and AWGN generator to
perform per the standards. F-SCH uses TDSO (Service
Option 32)
No, requires soft handoff capability
No, requires soft handoff capability
No, requires soft handoff capability
3.4.6 Demodulation of Power Control Subchannel
During Soft Handoff
3.4.7 Demodulation of Forward Traffic Channel in
Multipath Fading Channel with Closed Loop Power
Control (FPC_MODE=000)
3.4.8 Demodulation of Forward Traffic Channel During
Soft Handoff with Closed Loop Power Control
(FPC_MODE=000)
3.4.9 Demodulation of Forward Traffic Channel in
Multipath Fading Channel with Closed Loop Power
Control (FPC_MODE=000 or 100)
3.4.10 Demodulation of Forward Traffic Channel in
Multipath Fading Channel with Closed Loop Power
Control (FPC_MODE=000) and Transmit Diversity
(OTD or STS)
3.4.12 Demodulation of Power Control Subchannel
During Reverse Fundamental Channel Gating
3.5.4 Adjacent Channel SelectivityYes, with external CDMA generator
3.6.1 Conducted Spurious EmissionsNo, use the HP 859XE +HP 85725C CDMA Spectrum
Analyzer
3.6.2 Radiated Spurious EmissionsNo, use the HP 859XE +HP 85725C CDMA Spectrum
Analyzer
3.7.1 Supervision Paging ChannelPartially, but the test set does not provide timing
measurements
3.7.2 Sup ervision Forward Channel - Test 1 and Tes t 2No
4.1 Transmit Frequency AccuracyYes, uses the rho or EVM measurement method
4.2.1 CDMA to CDMA Hard HandoffPartially, performs F
to F2 Hard handoffs, but cannot
1
make the required timing measurement
4.2.2 Transmit Power after Hard HandoffNo
4.2.3 Candidate Frequency Single SearchNo
4.3.1 Time ReferenceYes, uses the rho or EVM measurement method.
Time Reference Slew RatePartially, requires an external fader & external timing
measurement device. E1962A requires mobile test mode to
set-up call
4.3.2 Reverse Pilot Channel to Code Channel Time
Yes
Tolerance
4.3.3 Reverse Pilot Channel to Code Channel Phase
Yes
Tolerance
4.3.4 Waveform Quality and Frequency AccuracyYes, uses the rho or EVM measurement method. The test
set also measures multi-coded waveform quality, a
non-standard but more useful measurement.
4.3.5 Code Domain PowerYes
4.4.1 Range of Open Loop Output PowerYes, Uses access pro be power measurement. Enhanced
Access Channel is not currently supported.
4.4.3 Access Probe Output PowerYes, use call limit feature to prevent call from connecting.
Support for SR1 and SR3 Enhanced Access Channel is a
possible future enhancement.
4.4.4 Range of Closed Loop Power ControlYes, but does not make timing measurements. Test 2 not
supported.
4.4.5 Maximum RF Output PowerYes. Spurious emissions requires an external spectrum
analyzer.
4.4.6 Minimum Controlled Output PowerUses channel power measurement.
4.4.7 Standby Output Power and Gated Output PowerPartially, the E1962B has graphical Gated Power
measurements.
4.4.8 Power up Function Output PowerNo
4.4.9 Code Channel to Reverse Pilot Output Power
Accuracy
Yes, except Enhanced Access Channel Header, Enhanced
Access Channel Data and Reverse Common Control
Channel Data.
4.4.10 Reverse Pilot Channel Phase DiscontinuityNo. The test set provides call setup. HP859XE and HP
85725C are needed to make the measurement.
Amplitude offsets compensate fo r los s or gain between the test set ’s RF IN/OUT front panel connector and the
mobile station’s RF connector.
To access the amplitude offset feature, press the SYSTEM CONFIG key, followed by the RF IN/OUT Amptd
Offset key, F5.
Amplitude offset settings are preserved during power cycles or instrument preset.
Setting Up Amplitude Offsets and Frequency Points
Up to 20 frequency points can be assigned an amplitude offset. Negative amplitude offset values should be
entered when there is a loss through the RF cabling and test fixtures and positive values should be entered
when there is a gain.
The RF IN/OUT Amplitude Offset table displays the current (on/off) state of the amplitude offset feature.
There are also 20 rows for entering frequencies and 20 rows for entering corresponding offset values. T o enter
values in the table use the RF IN/OUT Amplitude Offset Setup menu.
To set up amplitude offsets remotely, one comma-separated string is sent to set up frequency points and
another comma-separated string assigns the corresponding amplitudes.
GPIB Commands
MHZ,1879.8 MHZ”
!sets the first 4 frequencies in the amplitude offset table.
OUTPUT 714;”SYSTEM:CORRECTION:SGAIN -2.55,-3.12,-3.68,-4.23”
!sets the first 4 amplitude offsets in the amplitude offset table.
When the RF IN/OUT Amplitude Offset State is on, all offsets that are not individually turned off are applied
and the word “Offset” appears in the Instrument Status Area of the test set’s display.
If the RF IN/OUT Amplitude Offset State is off, none of the amplitude offsets are applied.
GPIB Command
!Sets the RF IN/OUT Amplitude Offset State to On
OUTPUT 714;”SYSTEM:CORRECTION:STATE ON”
NOTE If the RF IN/OUT Amplitude Offset State is turned off , none of the amplitude offsets are on,
even if values are entered for the individual offsets.
Examples of Amplitude Offset Behavior
When the amplitude offset table entries accurately represent the loss in all components (cabling, connectors,
and test fixturing) in the signal path between the test set and the mobile stati on, the test set will make the
necessary adjustments in both receiver and transmitter measurements.
When you set a transmit power level, the test set uses the amplitude offset value to adjust the power so that
the test set’s transmit power level refers to the power level received at the mobile station.
For example, with the test set’s transmit power set to
level transmitted from the test set will be automatically off set to
the mobile station will receive
−85 dBm, the actual setting.
−85 dBm and a −3 dB amplitude offset the actual power
−82 dBm. With a 3 dB loss in the signal path
Figure 10.Amplitude Offset Mobile Station Receiver Example
Agilent 8960
Transmit Power setting = –85 dBm
Amplitude offset = –3 dB
–3 dB network
(bidirectional)
Power = –82 dBmPower = –85 dBm
Mobile Station Transmitter Example
When you measure power from the mobile station, the displayed and queried values are offset to show the
level at the mobile station.
For example, with the mobile station transmitting 12 dBm and a
−3 dB amplitude offset is entered, the
measured power at the test set would be 9 dBm. The displayed power level is automatically adjusted to 12
dBm to show the level at the mobile station.
Mobile
Station
If the expected power, which can be set manually or automatically is 12 dBm, the test set’s internal hardware
adjusts itself to r eceive 9 dBm whic h is the actual power from the mobil e stati on after 3 dB loss in th e network.
Figure 11. Amplitude Offset Mobile Station Transmitter Example
Signal Flow
Agilent 8960
Expected Power setting = 12 dBm
Amplitude offset = –3 dB
If mobile station testing is performed at frequencies that do not have amplitude offsets assigned to them, the
test set will estimate an amplitude offset based on the nearest settings. For exampl e, the following screen
shows five amplitude offsets for frequencies ranging from 890.2 MHz to 1710.2 MHz.
Figure 12.RF IN/OUT Amplitude Offset Setup
For test frequencies between the lowest (890.2 MHz) and highest (1710.2 MHz) frequency points that are not
entered in the table, the test set will calculate offsets using piece-wise linear interpolation.
The graph shown in Figure 13. is a conceptual representation of the test set’s amplitude offset configuration
using the settings from the RF IN/OUT Amplitude Offset table in Figure 12. “RF IN/OUT Amplitude Offset
Setup”. Each of the five points are shown on a non-scaled frequncy versus amplitude offset graph. At a test
frequency of 890.4 MHz, whic h is midway between point number one (-1 dB) and point number two (- 2 dB) th e
test set applies an offset of -1.5 dB. Be aware that since amplitude offsets are in units of dB, this piece-wise
linear interpolation does not pro duce a linear transition from point to point.
If testing is done outside the range of frequencie s bounded by the lowest and highest frequency entries, the
test set simply uses the amplitude offset that is paired with the nearest frequency point.
Offset at 890.4 MHz
would equal -1.5 dB
-4
-5
Freque ncy (MHz)
IMPORTANTIt is highly recommended that amplitude offsets are set up for each test frequency. This
eliminates inaccuracies due to the mismatch between the test set’s linear interpolation and the
actual frequency response of the RF path betwe en the test set and mobile station.
Analog Voice Channel (AVC) test mode provides a forward voice channel for operating AMPS mobiles in test
mode. This allows you to get the mobile transmitti ng on an AVC and test many functions in the mobile without
the need to register or page the mobile.
AVC Test Mode Operation
When the test set’s operating mode is AVC test mode:
• No over the air signaling is available.
• Changes to the test set’s AVC channel assignment occur immediately.
• When the test set’s AVC channel is changed, the base station emulator is automatically reconfigured to
receive the corresponding reverse AVC signal from the mobile. If needed, you can disable this operation by
selecting manual receiver frequency control. See “Receiver Control” on page 213.
• Changes to the MS TX Level automatically set the ex pected analog input power. If needed, you can disable
this operation by selecting manual receiver power control. See “Receiver Control” on page 213.
• SAT modulation of the tes t set’s forward A VC can be turned on or off , and can be set t o any of the three col or
code frequencies.
• Internal FM of the forward AVC is available for various audio frequency tests.
• An external FM source can be used to provide addition fr equency modulation of the forward AVC.
Forward Channel FM Operation
Frequency modulation of the forw a rd c han nel in AVC test mode is a combination of the SAT, internal FM, and
external FM settings. No wideband data is present.
To meet sp eci ficatio ns , the total peak FM deviation cannot exceed 20 kHz. Limitat ions for eac h FM source are
as follows:
• SAT - can be turned on or off, and has three color code selections: SAT1 (5970 Hz), SAT2 (6000 Hz), SAT3
(6030 Hz). Peak devi ation is fixed at 2 kHz.
• Internal FM - can be turned on or off , has a rate range of 100 Hz to 20 kHz, and a peak deviation range of
0 Hz to 20 kHz.
• External FM - uses the test set’s rear-panel FM Mod In port to connect an external modulation source. The
fixed peak deviation for a 100 Hz to 20 kHz tone is 20 kHz/Volt.
AVC Test Mode Operation Using Au tomated Re ceiver Control
The following procedure demonstrates the use of AVC test mode where the base station emulator’s RF
generator frequency, measurement receiver frequency, and expected input power are automatically set by the
call control settings used. This is the most common way to use test mode because it requires less individual
configuration of call parameters.
This procedure provides general programmi ng steps, but is not written around any specific test require ments.
Some of the settings shown are the default power up settings f or AVC Test mode.
If you do not want internal FM on, use the FM State command to turn it off:
OUTPUT 714;”CALL:FM:INTernal:STATe OFF”
8. Turn external FM off.
OUTPUT 714;”CALL:FM:EXTernal:STATe OFF”
9. Connect the mobile’s antenna port to the test set’s RF IN/OUT port and p ut the mob ile i n anal og te st mode,
transmitting at power level two on channel 777.
If your mobile’s audio is not muted, you should hear a 1004 Hz tone out of its speaker. If you have an acoustic
or direct connection to the mobile’s audio output, you can make audio measurements through the test set’s
AUDIO IN connections. See “Audio Analyzer Measur eme nt De scription” on page 40.
You can also make analog transmit power and frequency stability measurements on the mobile’s reverse
channel carrier. If you modulate your mobile’s carrier, you can measure the frequency modulation
characteristics. See “Analog Transmit Power Measurement Description” on page 39, “Frequency Stability
Measurement Description” on page 59, and “Frequency Modulation (FM) Measurement Description” on page
AVC Test Mode Oper ation Using Manual Receiver Control
Note: Changing the operating mode affects manual receiver control parameters. See “Effects on Receiver
Control When Changing Operating Mode” on page 215.
The following procedure demonstrates the use of AVC test mode where the base station emulator’s RF
generator frequency, measurement receiver frequency, and expected input power are manually configured.
Manual control is not commonly used in prod uction testing, but is provided to allow the measurement rece iver
and RF generator to be used to perform tests where automated control may not be used; such as when tuning
the recevier to make measurements outside of the cellular band during AMPS testing.
This procedure provides general programmi ng steps, but is not written around any specific test require ments.
Some of the settings shown are the default power up settings for AVC Test mode.
Putting the mobile in analog test mode at the correct channel num ber and power setting is the responsibility
of the user.
1. Select AVC Test mode.
OUTPUT 714;”CALL:OPERating:MODE AVCT”
2. Turn on the base station emulator’s RF Generator and set the output level to -50 dBm.
OUTPUT 714;”CALL:POWer -50”
3. Set the base station emulator’s RF generato r to 893.310 MHz; the forward channel frequency for channel
If you do not want internal FM on, use the FM State command to turn it off:
OUTPUT 714;”CALL:FM:INTernal:STATe OFF”
10.Turn external FM off.
OUTPUT 714;”CALL:FM:EXTernal:STATe OFF”
11.Connect the mobile’s antenna port to the test set’s RF IN/OUT port and put the mobile in analog test mode,
transmitting at power level two and channel 777.
If your mobile’s audio is not muted, you should hear a 1004 Hz tone out of the speaker. If you have an acoustic
or direct connection to the mobile’s audio output, you can make audio measurements through the test set’s
AUDIO IN connections. See “Audio Analyzer Measur eme nt De scription” on page 40.
You can also make analog transmit power and frequency stability measurements on the mobile’s reverse
channel carrier. If you modulate your mobile’s carrier, you can measure the frequency modulation
characteristics. See “Analog Transmit Power Measurement Description” on page 39, “Frequency Stability
Measurement Description” on page 59, and “Frequency Modulation (FM) Measurement Description” on page
57.
Related Topics
“Programming: Getting Started Guide for cdma2000 Mobile Test” on page 124
“Receiver Control” on page 213
When the test set is in IS-2000 test operating mode (as opposed to active cell operating mode) it is necessary
for the mobile station under test to be capable of independantly performing operations that normally occur
through over-t he-air signaling. This capability is referred to as test mode and is usually accomplished using
commands which are sent to the mobile station from a system con troller (usually a personal computer)
through a proprietary digital interface. See <test mode paper>.
To make measurements on the reverse channel in test mode, the mobile station must first synchronize to the
test set’s forward pilot channel and demodulate the sync and paging channels. This is consistent with normal
system acquisition procedures and results in the mobile st ation reaching the mobile station idle state. In
active cell operating mode, the mobile station at this point would autonomously perform a power-up
registration after entering the idle state. A call could then be initiated, using over-the-air call processing, and
the fundamental channel would be established and maintained according to the applicable message protocol.
However, in test mode the test set and mobile station are directed to the same FCH (fundamental channel) by
the system controller or through manual user interfaces without over-the-air call processing.
Forward CDMA channels available in test mode
In test mode, the test set can be configured to transmit a forward channel that emulates a base station
operating in radio configuration (RC) 1, 2, 3, 4 or 5. See “Forward Channel Description” on page 784
CW operating mode provides an unmodulated carrier of adjustable frequency and amplitude, manual
adjustment of the measurement receiver and demodulation (uplink) receiver frequencies, and manual setting
of the expected CW input power.
Note: Changing the operating mode affects manual receiver control parameters. See “Effects on Receiver
Control When Changing Operating Mode” on page 215.
CW Test Mode Operation
When the test set’s operating mode is set to CW:
• No over the air signaling is used.
• No demodulation or channel decoding is available.
• An unmodulated RF signal can be generated while analyzing another signal (at the same frequency or at a
different frequency). No interaction exists between these controls.
• Expected CW power, measurement receiver frequency, and uplink receiver frequency are available as
manual settings only; no automatic control is provided.
CW Mode Operation
The following command examples show you how to control each function for CW operating mode:
To select a cellular system type using the test set’s front panel, see “How Do I Set Up a Call?” on page 683
The mobile station’s cellular sy stem type is selected using the “CALL[:CELL]:SYSTem[:TYPE]” call
processing subsystem commands.
Available System Types
The following system types are displayed under the System Type menu when the Operating Mode is set to
Active Cell (see “Active Cell Operating Mode” ) or Cell Off.
The test set’s base station emulator provides a selection of cell bands. To set the cell band using the test set’s
front panel, see “How Do I Set Up a Call?” on page 683.
Cell Bands
The following GPIB subsystem describes the cell bands:
The test set’s base station emulator provides five radio configuration selections. To set the the radio
configuration using the test set’s front panel, see “How Do I Set Up a Call?” on page 683.
Radio Configuration
The following GPIB subsystem describes the rad io configuration settings:
“CALL[:CELL]:RCONfig”
To select a service optio n fo r t he se l ected radio co n f iguration, see “CALL[:CELL]:SOPTION”