GSM/GPRS/EDGE SIGNAL ANALYZER
38
JD7105B Base Station Analyzer
P
OWER VS
T
IME
M
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.
This measurement provides masks for both of Base Transceiver Station (BTS) and Mobile Station
(MS). The timing masks are referenced to the transition from bit 13 to 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.
GSM/GPRS/EDGE Power vs Time measurement provides the followings.
P vs T Slot
P vs T Frame
Setting Mode
Step
Description
1.
Connect the cable
Connect the signal to the
Spectrum Analyzer RF In 50
Ω
port using the cable whose loss was measured.
2.
Select the mode
MODE
[Signal Analyzer]
[GSM]
[Power vs Time]
Press the
MODE
hard key.
Press the
Signal Analyzer
soft key.
Press the
GSM
soft key.
Press the
Power vs Time
soft key.
Setting Frequency
Step
Description
1.
Set the frequency
FREQ/DIST
[Center Frequency]
Enter a value
[GHz]
,
[MHz]
,
[kHz]
, or
[Hz]
or
[Channel Number]
Enter a value
[Forward]
or
[Reverse]
Press the
FREQ/DIST
hard key.
Press the
Center Frequency
soft key.
Use 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.
Press the
Channel Number
soft key.
Enter a channel number using the numeric keys.
Select the direction by pressing the
Forward
or
Reverse
.
