Power Vs Time Measurements; Setting Mode; Setting Frequency - JDS Uniphase JD7105B Manual

JD7105B Base Station Analyzer
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
1. Connect the cable
2. Select the mode
MODE
[Signal Analyzer]
[GSM]
[Power vs Time]

Setting Frequency

Step
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]
GSM/GPRS/EDGE SIGNAL ANALYZER
P T
OWER VS IME
Description
Connect the signal to the Spectrum Analyzer RF In 50Ω
port using the cable whose loss was measured.
Press the MODE hard key.
Press the Signal Analyzer soft key.
Press the GSM soft key.
Press the Power vs Time soft key.
Description
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.
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M
EASUREMENTS