Chapter 6
Using GSM/GPRS/EDGE Signal Analyzer
156
JD700B Series User’s Guide
Procedure
1
Press the
LIMIT
hot key.
2
Press the
RF Test Limits
soft key.
3
Select the test item(s) and set the limit(s) depending on your selected measurement mode:
To set the limit for
Select
Set
Channel power
Channel Power
High Limit, Low Limit
Occupied bandwidth
Occupied BW
High Limit
Spectrum emission mask
Spectrum Emission Mask
(On/Off only)
Output RF spectrum
Output RF Spectrum
(On/Off only)
Spurious emissions
Spurious Emissions
(On/Off only)
4
Optional
. You can enable alarm sound that goes off if the measurement falls outside of the limit.
Toggle the Beep soft key between On and Off to enable or disable the beep sound.
5
Optional
. Go to
SAVE/LOAD > Save
, and then select
Limit
to save the limit settings.
See “Using save” on page 35 for more information.
Conducting power vs. time measurements
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 you view the rise, fall, and
useful part of the GSM burst.
This measurement provides masks for both of Base Transceiver Station (BTS) and Mobile Station (MS). The
timing masks are referenced to the transition from the bit 13 to the bit 14 of the mid-amble training
sequence. For GMSK measurements, the 0 dB reference is determined by measuring the mean transmitted
power during the useful part of the burst.
Power vs. time (slot)
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 145, you can
continue your measurement. The measurement settings can be saved and recalled as a file.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
Press the
Time Slot
soft key to assign a time slot with which performs measurements, and then
select your desired time slot number from
0
to
7
.
3
Press the
Detect Mode
soft key, and then select the signal standard option:
Auto
,
GSM
, or
EDGE
.
Auto is set by default. The instrument applies a mask automatically based on the selected mode.
4
Optional
. To set the delay, complete the following steps:
Press the
Miscellaneous
soft key.
Press the
Delay
soft key to set the amount of delay in µs.
Enter a value by using the numeric keys. You can also use the rotary knob.
Press the
µs
soft key.
NOTE
The Delay setting is used only when there is a time offset in the signals to be measured.
Содержание CellAdvisor JD700B Series
Страница 2: ...CellAdvisorTM JD700B Series FW3 120 User s Guide ...
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Страница 808: ...Appendix JD700B Series User s Guide 807 JD740B series ...
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