JDS Uniphase JD7105B Manual

Gsm/gprs/edge signal analyzer

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GSM/GPRS/EDGE Signal Analyzer

This GSM/GPRS/EDGE Signal Analyzer function is optional that the JD7105B Base Station Analyzer

offers as the Option 022 for GSM/GPRS/EDGE. It allows the user to check conformity to the 3GPP TS

51.021 Base Station System (BSS) equipment specification: Radio Aspects V8.9.0 (2003-06) and

analyze GSM/EDGE system performance. The GSM//GPRS/EDGE OTA Analyzer which is the Option

042 can be added to the GSM/GPRS/EDGE Signal Analyzer for Over The Air measurement.

In this Chapter

Using GSM/GPRS/EDGE Signal Analyzer .............................................................................................. 4

Display Overview ..................................................................................................................................... 5

Connecting a Cable ................................................................................................................................. 7

Direct Connection ...................................................................................................................... 7

Indirect Connection ................................................................................................................... 7

Over The Air (OTA) ................................................................................................................... 8

Spectrum Analysis Measurement ............................................................................................................ 9

Setting Mode ............................................................................................................................. 9

Setting Frequency ..................................................................................................................... 9

Setting Amplitude .................................................................................................................... 10

Setting Averaging .................................................................................................................... 12

Setting Sweep Mode ............................................................................................................... 12

Setting Trace and Display ....................................................................................................... 12

Measurement Example ........................................................................................................... 13

Using Marker ........................................................................................................................... 13

Using Peak Search ................................................................................................................. 15

RF Analysis Measurements ................................................................................................................... 16

Setting Mode ........................................................................................................................... 16

Setting Frequency ................................................................................................................... 16

Setting Amplitude .................................................................................................................... 17

Setting Averaging .................................................................................................................... 19

Setting Sweep Mode ............................................................................................................... 19

Setting Trigger Source ............................................................................................................ 19

Channel Power ...................................................................................................................................... 21

Measurement Procedure ........................................................................................................ 21

Setting Limit ............................................................................................................................ 22

Measurement Example ........................................................................................................... 23

Using Marker ........................................................................................................................... 23

Using Peak Search ................................................................................................................. 24

Occupied Bandwidth .............................................................................................................................. 25

Measurement Procedure ........................................................................................................ 25

Setting Limit ............................................................................................................................ 25

JD7105B Base Station Analyzer

GSM/GPRS/EDGE SIGNAL ANALYZER

Table of Contents

Summary of Contents for JDS Uniphase JD7105B

Page 1: Table Of Contents
JD7105B Base Station Analyzer GSM/GPRS/EDGE Signal Analyzer This GSM/GPRS/EDGE Signal Analyzer function is optional that the JD7105B Base Station Analyzer offers as the Option 022 for GSM/GPRS/EDGE. It allows the user to check conformity to the 3GPP TS 51.021 Base Station System (BSS) equipment specification: Radio Aspects V8.9.0 (2003-06) and analyze GSM/EDGE system performance.
Page 2 JD7105B Base Station Analyzer Measurement Example ......................27 Using Marker ........................... 27 Using Peak Search ......................... 28 Spectrum Emission Mask (SEM) ......................29 Measurement Procedure ......................29 Setting Limit ..........................30 Measurement Example ......................31 Using Marker ........................... 31 Using Peak Search ......................... 32 Spurious Emissions ..........................
Page 3 JD7105B Base Station Analyzer Setting Frequency ........................65 Setting Zoom Position ......................66 Measurement Procedure ......................66 Measurement Example ......................67 GSM OTA Multipath Profile ........................68 Setting Mode ........................... 68 Measurement Procedure ......................68 Measurement Example ......................69 GSM OTA Modulation Analyzer ......................71 Setting Mode ...........................
Page 4: Using Gsm/Gprs/Edge Signal Analyzer
3G wireless services such as multimedia and other broadband applications. It uses TDMA and 3π/8 8PSK (phase shift keying) modulation. The JD7105B performs measurements using the methods and limits as defined in the 3GPP TS 51.021 Base Station System (BSS) equipment specification: Radio Aspects V8.9.0 (2003-06). The Pass/Fail indictor helps the user to determine base station performance easily.
Page 5: Display Overview
JD7105B Base Station Analyzer ISPLAY VERVIEW Overview of GSM Signal Analyzer Display ① Measurement Mode Information: GSM Signal Analyzer ② Spectrum Windows X and Y Scale or Setting Information: This window shows the most common settings or parameters of each measurement. Frequency/Channel setting, Amplitude setting (Preamp, Attenuation, External offset), Reference setting information Frequency/Trigger) ③...
Page 6 JD7105B Base Station Analyzer ④ Trace Information C: Captured M: Max Hold m: Min Hold W: Write Current Trace (Indicates current active trace) L: Loaded F: Trace View Off ⑤ Information on Marker Table displays up to 6 markers ⑥ Screen Menu Title ⑦...
Page 7: Connecting A Cable
JD7105B Base Station Analyzer ONNECTING A ABLE Direct Connection PA Output Port and RF In Port Connection Indirect Connection Monitor Port and RF In Port Connection The maximum power for the Spectrum Analyzer RF In 50Ω port is 30 dBm (1 Watt).
Page 8: Over The Air (Ota)
JD7105B Base Station Analyzer Over The Air (OTA) OTA Connection The maximum power for the Spectrum Analyzer RF In 50Ω port is 30 dBm (1 Watt). If the input signal level to be measured is greater than 30 dBm, use a High Power Attenuator to prevent damage when you directly connect the signal to the instrument.
Page 9: Spectrum Analysis Measurement
JD7105B Base Station Analyzer PECTRUM NALYSIS EASUREMENT Setting Mode Step Description Connect the cable Connect the signal to the Spectrum Analyzer RF In 50Ω port using the cable whose loss was measured. Select the mode MODE Press the MODE hard key.
Page 10: Setting Amplitude
JD7105B Base Station Analyzer FREQ/DIST  CENTER FREQUENCY: Changes the center frequency setup. Values can be entered with the numeric keys, the rotary knob, or the arrow keys. When using the numeric keys, the input is completed by selecting one of the unit soft keys including GHz, MHz, kHz, and Hz. When using the rotary knob or the arrow keys, the frequency changes in a predefined frequency step.
Page 11 JD7105B Base Station Analyzer AMP/SCALE  AUTO SCALE: The instrument can automatically set the scale to the minimum and maximum values on the Y-axis of the graph for optimum display of the traces measured. Each time the Auto Scale is selected, the top and bottom scales are set to the minimum and maximum values with margin on the Y-axis of the display screen.
Page 12: Setting Averaging
JD7105B Base Station Analyzer Setting Averaging BW/AVG  AVERAGE: Sets the number of measurements to be averaged for the trace presentation. A maximum of 99 times of averaging can be set. Step Description Set the averaging BW/AVG Press the BW/AVG hard key.
Page 13: Measurement Example
JD7105B Base Station Analyzer  CLEAR WRITE: Clears the selected trace and writes or assigns the current trace.  MAX HOLD: Sets the active trace to display the maximum response of the input signal. Active trace compares newly acquired data with the trace shown on the screen and displays the bigger trace on the display screen.
Page 14 JD7105B Base Station Analyzer marker is placed on any position of the trace. The position displaying the marker’s X and Y coordinates may be slightly different for each measurement mode and refer to the description of each measurement. There are three different marker types available: Normal, Delta, and Delta pair. Marker position can be set manually by entering numeric values (frequency) when one of the marker types is selected.
Page 15: Using Peak Search
JD7105B Base Station Analyzer Using Peak Search PEAK SEARCH Each time the Peak Search soft key is pressed, the active marker is positioned at the highest peak of the trace.  PEAK SEARCH: Moves the active marker to the highest peak of the trace.
Page 16: Rf Analysis Measurements
JD7105B Base Station Analyzer RF A NALYSIS EASUREMENTS GSM/GPRS/EDGE Signal Analysis provides the following measurements for RF Analysis.  Channel Power  Occupied Bandwidth  Spectrum Emission Mask  Spurious Emissions Setting Mode Step Description Connect the cable Connect the signal to the Spectrum Analyzer RF In 50Ω...
Page 17: Setting Amplitude
JD7105B Base Station Analyzer FREQ/DIST This setting is not used in the Spurious Emissions mode.  CENTER FREQUENCY: Changes the center frequency setup. Values can be entered with the numeric keys, the rotary knob, or the arrow keys. When using the numeric keys, the input is completed by selecting one of the unit soft keys including GHz, MHz, kHz, and Hz.
Page 18 JD7105B Base Station Analyzer AMP/SCALE  AUTO SCALE: The instrument can automatically set the scale to the minimum and maximum values on the Y-axis of the graph for optimum display of the traces measured. Each time the Auto Scale is selected, the top and bottom scales are set to the minimum and maximum values with margin on the Y-axis of the display screen.
Page 19: Setting Averaging
JD7105B Base Station Analyzer Setting Averaging BW/AVG  AVERAGE: Sets the number of measurements to be averaged for the trace presentation. A maximum of 99 times of averaging can be set. Step Description Set the averaging BW/AVG Press the BW/AVG hard key.
Page 20 JD7105B Base Station Analyzer  RF BURST: Sets the trigger level when using the RF Burst (wideband) trigger. The value is relative to the peak of the signal. RF Burst is also known as RF Envelope.  INTERNAL FB (FREE BURST): Sets the trigger level to FB if there is a frequency burst signal.
Page 21: Channel Power
Measurement Procedure Step Description Connect the cable Connect the cable to the Spectrum Analyzer RF In 50Ω port of the JD7105B and the RF Output port of BTS. Set the measurement mode MODE Press the MODE hard key. [Signal Analyzer] Press the soft key to select the Signal Analyzer mode.
Page 22: Setting Limit
JD7105B Base Station Analyzer  RX FILTER: Sets the internal RX filter bandwidth among 100K, 200K, 400K, and 624K. Default setting is 400K. Setting Limit LIMIT This hot key is used to set the threshold value for the limit line on the display screen. It turns on or off the limit or band limit settings of the measurement for pass/fail indication.
Page 23: Measurement Example
JD7105B Base Station Analyzer threshold or limit value and press the dBm unit soft key or the ENTER hard key to complete the input. Measurement Example GSM Channel Power Measurement Screen Using Marker MARKER Marker is used to get the information about a specific trace. Six markers can be set on the display and each marker can be used independently.
Page 24: Using Peak Search
JD7105B Base Station Analyzer is turned off and then on again in the same measurement mode, markers appear at the previous positions. If a measurement mode is changed, markers are not restored to their previous positions.  NORMAL: This Normal marker type provides the reading of a marker position on the trace along with the marker number between 1 and 6.
Page 25: Occupied Bandwidth
Measurement Procedure Step Description Connect the cable to the Spectrum Analyzer RF In 50Ω Connect the cable port of the JD7105B and the RF Output port of BTS. Set the measurement mode MODE Press the MODE hard key. [Signal Analyzer] Press the soft key to select the Signal Analyzer mode.
Page 26 JD7105B Base Station Analyzer be inactive first to get the Limit hot key function other than the number input. Step Description Select the limit mode LIMIT Press the LIMIT hot key. It is the number 7 key in the numeric keypad.
Page 27: Measurement Example
JD7105B Base Station Analyzer Measurement Example GSM Occupied Bandwidth Measurement Screen Using Marker MARKER Marker is used to get the information about a specific trace. Six markers can be set on the display and each marker can be used independently. The X and Y coordinates of the trace are displayed when the marker is placed on any position of the trace.
Page 28: Using Peak Search
JD7105B Base Station Analyzer  DELTA: This Delta marker type is associated with a Normal marker. A Normal marker must be set before a Delta marker is set. When the Delta marker is set, the position set by the Delta marker becomes the reference position of the Normal marker and the marker’s X and Y values displays...
Page 29: Spectrum Emission Mask (Sem)
Measurement Procedure Step Description Connect the cable to the Spectrum Analyzer RF In 50Ω Connect the cable port of the JD7105B and the RF Output port of BTS. Set the measurement mode MODE Press the MODE hard key. [Signal Analyzer] Press the soft key to select the Signal Analyzer mode.
Page 30: Setting Limit
JD7105B Base Station Analyzer Setting Limit LIMIT This hot key is used to set the threshold value for the limit line on the display screen. It turns on or off the limit or band limit settings of the measurement for pass/fail indication. The user input window must be inactive first to get the Limit hot key function other than the number input.
Page 31: Measurement Example
JD7105B Base Station Analyzer Measurement Example GSM Spectrum Emission Mask Measurement Screen Using Marker MARKER Marker is used to get the information about a specific trace. Six markers can be set on the display and each marker can be used independently. The X and Y coordinates of the trace are displayed when the marker is placed on any position of the trace.
Page 32: Using Peak Search
JD7105B Base Station Analyzer  DELTA: This Delta marker type is associated with a Normal marker. A Normal marker must be set before a Delta marker is set. When the Delta marker is set, the position set by the Delta marker becomes the reference position of the Normal marker and the marker’s X and Y values displays...
Page 33: Spurious Emissions
Measurement Procedure Step Description Connect the cable Connect the cable to the Spectrum Analyzer RF In 50Ω port of the JD7105B and the RF Output port of BTS. Set the measurement mode MODE Press the MODE hard key. [Signal Analyzer] Press the soft key to select the Signal Analyzer mode.
Page 34 JD7105B Base Station Analyzer [Stop Limit] Press the Stop Limit soft key. Enter a value Use the numeric keys. [dBm] Press the unit soft key to complete the input. [Measure Type] Press the Measure Type soft key to toggle between <Examine>...
Page 35: Setting Limit
JD7105B Base Station Analyzer Setting Limit LIMIT This hot key is used to set the threshold value for the limit line on the display screen. It turns on or off the limit or band limit settings of the measurement for pass/fail indication. The user input window must be inactive first to get the Limit hot key function other than the number input.
Page 36: Measurement Example
JD7105B Base Station Analyzer Measurement Example GSM Spurious Emissions Measurement Screen Using Marker MARKER Marker is used to get the information about a specific trace. Six markers can be set on the display and each marker can be used independently. The X and Y coordinates of the trace are displayed when the marker is placed on any position of the trace.
Page 37: Using Peak Search
JD7105B Base Station Analyzer  DELTA: This Delta marker type is associated with a Normal marker. A Normal marker must be set before a Delta marker is set. When the Delta marker is set, the position set by the Delta marker becomes the reference position of the Normal marker and the marker’s X and Y values displays...
Page 38: Power Vs Time Measurements
JD7105B Base Station Analyzer OWER VS EASUREMENTS The Power vs Time measurement measures the mean transmission power during the useful part of GSM bursts and verifies that the power ramp fits within the defined mask. It also lets the user view the rise, fall, and useful part of the GSM burst.
Page 39: Setting Amplitude
JD7105B Base Station Analyzer Select the channel standard [Channel Standard] Press the Channel Standard soft key to get the pop-up window of the channel standard list. Select a channel standard Press the arrow keys, rotate the knob, or press the Page Up and Page Down soft keys to highlight a frequency band to select.
Page 40 JD7105B Base Station Analyzer Set the attenuation level [Attenuation] Press the Attenuation soft key. The Auto mode is set by default. This key toggles between the Auto and Manual. <Auto> or <Manual> Press the Attenuation soft key to highlight the Manual mode and change the attenuation value to optimize S/N.
Page 41: Setting Averaging
JD7105B Base Station Analyzer Setting Averaging BW/AVG  AVERAGE: Sets the number of measurements to be averaged for the trace presentation. A maximum of 99 times of averaging can be set. Step Description Set the averaging BW/AVG Press the BW/AVG hard key.
Page 42: Setting External Clock
To enhance the reliability of Code Domain measurements the JD7105B must be synchronized with the Base Station. When an external clock is not supplied, the JD7105B works with a built-in internal high- accuracy time base. In this case, some measurement results may exhibit inaccurate values. Therefore, it is highly recommended to use the same reference clock as signal source.
Page 43: Measurement Procedure
Measurement Procedure Step Description Connect the cable to the Spectrum Analyzer RF In 50Ω Connect the cable port of the JD7105B and the RF Output port of BTS. Set the measurement mode MODE Press the MODE hard key. [Signal Analyzer] Press the soft key to select the Signal Analyzer mode.
Page 44: Setting Limit
JD7105B Base Station Analyzer  RX FILTER: Sets the internal RX filter bandwidth among 100K, 200K, 400K, and 624K. Default setting is 400K.  PSK CONSTELLATION: Sets the PSK constellation observation mode.  PSK DC REMOVE: Enables or disables the PSK DC removal.
Page 45 JD7105B Base Station Analyzer numeric keypad. [Beep] Press the Beep soft key to toggle between On and Off <On> or <Off> and select one. This will make audible alarm if the measurement beyond the limit. PvsT TEST LIMITS  BURST POWER: Sets the burst power limits.
Page 46: Measurement Example
JD7105B Base Station Analyzer Measurement Example GSM Power vs Time (Slot) Measurement Screen GSM Power vs Time (Frame) Measurement Screen GSM/GPRS/EDGE SIGNAL ANALYZER...
Page 47: Constellation Measurement
JD7105B Base Station Analyzer ONSTELLATION EASUREMENT The Constellation is used to observe some aspects of modulation accuracy and can reveal certain fault mechanisms such as I/Q amplitude imbalance or quadrature imbalance. It displays constellation diagram by modulation types. Setting Mode...
Page 48: Setting Amplitude
JD7105B Base Station Analyzer FREQ/DIST  CENTER FREQUENCY: Changes the center frequency setup. Values can be entered with the numeric keys, the rotary knob, or the arrow keys. When using the numeric keys, the input is completed by selecting one of the unit soft keys including GHz, MHz, kHz, and Hz. When using the rotary knob or the arrow keys, the frequency changes in a predefined frequency step.
Page 49: Setting Averaging
JD7105B Base Station Analyzer AMP/SCALE  REFERENCE LEVEL: Sets the maximum Y-axis range when using the Spectrum Analyzer or Signal Analyzer function.  ATTENUATION  AUTO: Input attenuator’s value is automatically set depending on the reference level. This is the default operation mode, so it is recommended to use this mode unless a special measurement condition is needed.
Page 50: Setting Trace And Display
JD7105B Base Station Analyzer [Enter] or ENTER Press the Enter soft key or the ENTER hard key. BW/AVG  AVERAGE: Sets the number of measurements to be averaged for the trace presentation. A maximum of 99 times of averaging can be set.
Page 51: Setting External Clock
To enhance the reliability of Code Domain measurements the JD7105B must be synchronized with the Base Station. When an external clock is not supplied, the JD7105B works with a built-in internal high- accuracy time base. In this case, some measurement results may exhibit inaccurate values. Therefore, it is highly recommended to use the same reference clock as signal source.
Page 52: Measurement Procedure
Measurement Procedure Step Description Connect the cable to the Spectrum Analyzer RF In 50Ω Connect the cable port of the JD7105B and the RF Output port of BTS. Set the measurement mode MODE Press the MODE hard key. [Signal Analyzer] Press the soft key to select the Signal Analyzer mode.
Page 53: Setting Limit
JD7105B Base Station Analyzer  PSK CONSTELLATION: Sets the PSK constellation observation mode.  PSK DC REMOVE: Enables or disables the PSK DC removal. Setting Limit LIMIT This hot key is used to set the threshold value for the limit line on the display screen. It turns on or off the limit or band limit settings of the measurement for pass/fail indication.
Page 54 JD7105B Base Station Analyzer [IQ Origin Offset] Press the IQ Origin Offset soft key. [Test Limits] Press the Test Limits soft key. Toggle between On and <On> or <Off> Off. [High Limit] [C/I] Press the C/I soft key. [Test Limits] Press the Test Limits soft key.
Page 55 JD7105B Base Station Analyzer  TEST LIMITS: Enables or disables the test limit(s). Toggle the Test Limits soft key between On and Off.  HIGH LIMIT: Sets the upper limit. Use the numeric keys to input value and press the unit soft key or the ENTER hard key to complete the input.
Page 56: Measurement Example
JD7105B Base Station Analyzer Measurement Example GSM Constellation Measurement Screen GSM/GPRS/EDGE SIGNAL ANALYZER...
Page 57: Gsm Ota Measurements
Connect the cable Connect an Omni/Directional RF Antenna to the to the Spectrum Analyzer RF In 50Ω port of the JD7105B. Connect a GPS Antenna to the GPS port of the JD7105B. Select the mode MODE Press the MODE hard key.
Page 58 JD7105B Base Station Analyzer Enter a value Enter a channel number using the numeric keys. [Forward] or [Reverse] Select the direction by pressing the Forward or Reverse. Select the channel standard [Channel Standard] Press the Channel Standard soft key to get the pop-up window of the channel standard list.
Page 59: Setting Amplitude
JD7105B Base Station Analyzer Setting Amplitude Step Description Set the reference level AMP/SCALE Press the AMP/SCALE hard key. [Reference Level] Press the Reference Level soft key. Enter a reference level value Use the numeric keys or the rotary knob that changes in a 10 dB step.
Page 60: Setting Sweep Mode
To enhance the reliability of Code Domain measurements the JD7105B must be synchronized with the Base Station. When an external clock is not supplied, the JD7105B works with a built-in internal high- accuracy time base. In this case, some measurement results may exhibit inaccurate values. Therefore,...
Page 61 JD7105B Base Station Analyzer it is highly recommended to use the same reference clock as signal source. Trigger mode can be changed by using the TRIGGER hot key. STANDARDS Clock Type Reference Port Switching Standard 10 MHz Internal Internal 10 MHz...
Page 62: Gsm Ota Channel Scanner
Setting Mode Step Description Connect the cable Connect an Omni/Directional RF Antenna to the to the Spectrum Analyzer RF In 50Ω port of the JD7105B. Select the mode MODE Press the MODE hard key. [Signal Analyzer] Press the Signal Analyzer soft key.
Page 63: Setting Zoom Position
JD7105B Base Station Analyzer FREQ/DIST  START CHANNEL: Changes the starting channel in the channel scanner. The first channel in the full view graph changes accordingly. Values can be entered with the numeric keys and the input is completed by selecting one of the direction soft keys including the Forward and Reverse.
Page 64: Measurement Example
JD7105B Base Station Analyzer [OTA] Press the OTA soft key. [Channel Scanner] Press the Channel Scanner soft key. Set the measurement parameters MEASURE SETUP Press the MEASURE SETUP hard key. [Detector] Press the Detector soft key to toggle between RMS and <RMS>...
Page 65: Gsm Ota Frequency Scanner
Setting Mode Step Description Connect the cable Connect an Omni/Directional RF Antenna to the to the Spectrum Analyzer RF In 50Ω port of the JD7105B. Select the mode MODE Press the MODE hard key. [Signal Analyzer] Press the Signal Analyzer soft key.
Page 66: Setting Zoom Position
JD7105B Base Station Analyzer Setting Zoom Position Step Description Set the zoom position TRACE/DISPLAY Press the TRACE/DISPLAY hard key. [Zoom Position] Press the Zoom Position soft key. Enter a value Use the numeric keys to input frequency to start. [Enter] or ENTER Press the Enter soft key or the ENTER hard key.
Page 67: Measurement Example
JD7105B Base Station Analyzer Measurement Example GSM OTA Frequency Scanner Measurement Screen GSM/GPRS/EDGE SIGNAL ANALYZER...
Page 68: Gsm Ota Multipath Profile
Connect the cable Connect an Omni/Directional RF Antenna to the to the Spectrum Analyzer RF In 50Ω port of the JD7105B. Connect a GPS Antenna to the GPS port of the JD7105B. Select the mode MODE Press the MODE hard key.
Page 69: Measurement Example
JD7105B Base Station Analyzer [uSec] or ENTER Press the unit soft key or the ENTER hard key. [RX Filter] Press the RX Filter soft key to select the internal RX filter [No Filter], [100K], [200K], bandwidth among the choices. [400K (Default)], or [624K] [PSK DC Remove] Press the PSK DC Remove soft key.
Page 70 JD7105B Base Station Analyzer POSITIONING INFORMATION If a GPS antenna is supplied and locked to the satellites, the positioning information including longitude, latitude, and the number of tracked satellites will be displayed on the bottom of the screen. GPS Indicator...
Page 71: Gsm Ota Modulation Analyzer
Connect the cable Connect an Omni/Directional RF Antenna to the to the Spectrum Analyzer RF In 50Ω port of the JD7105B. Connect a GPS Antenna to the GPS port of the JD7105B. Select the mode MODE Press the MODE hard key.
Page 72: Setting Limit
JD7105B Base Station Analyzer [PSK Constellation] Press the PSK Constellation soft key. Toggle between <On> or <Off> On and Off. GSM OTA Modulation Analyzer Measurement Procedure MEASURE SETUP  DETECT MODE: Selects the signal standard of GSM or EDGE. Default setting is Auto.
Page 73 JD7105B Base Station Analyzer [Phase Error PEAK] Press the Phase Error PEAK soft key. [Test Limits] Press the Test Limits soft key. Toggle between On and <On> or <Off> Off. [High Limit] [Low Limit] [EVM RMS] Press the EVM RMS soft key.
Page 74 JD7105B Base Station Analyzer  TEST LIMITS: Enables or disables the test limit(s). Toggle the Test Limits soft key between On and Off.  HIGH LIMIT: Sets the upper limit. Use the numeric keys to input value and press the unit soft key or the ENTER hard key to complete the input.
Page 75: Measurement Example
JD7105B Base Station Analyzer On and Off.  LOW LIMIT: Sets the lower limit. Use the numeric keys to input value and press the unit soft key or the ENTER hard key to complete the input. Measurement Example GSM OTA Modulation Analyzer Measurement Screen...

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