Anritsu MT8801C - Page 255

Section 6 Peformance Tests
6-12
(4) Test procedures: Waveform quality of signal generator
Step Procedure
1. Initialize the MT8801C and the transmitter tester.
2. Set the MT8801C as follows:
RF Input/Output: Main Set it on the Instrument Setup screen.
Using Specification: IS-95A Set it on the Setup Common Parameter screen.
CDMA Channel: 340 Ch Set it on the Setup Common Parameter screen.
Ref Level Auto Set: On Set it on the Setup Common Parameter screen.
BS Output Power: –20 dBm Set it on the Setup Common Parameter screen.
AWGN Level: Off Set it on the Setup Common Parameter screen.
3. Set the transmitter tester as follows:
RF Input: Aux Set it on the Instrument Setup screen.
Measuring Object: Forward Set it on the Setup Common Parameter screen.
Data Rate: 9600 bps Set it on the Setup Common Parameter screen.
Modulation Analysis Length:
24 Set it on the Setup Common Parameter screen.
Filter: Filter + EQ Set it on the Setup Common Parameter screen.
PN Synchronization: PN Search Set it on the Setup Common Parameter screen.
PN Offset: 0 Set it on the Setup Common Parameter screen.
Tau Reference: Nothing Set it on the Setup Common Parameter screen.
Frequency: 835.2 MHz (IS-95A)/1880 MHz (J-STD-008)
Reference Level: –20 dBm
4. Execute Start on the Setup Common Parameter screen of MT8801C. When “Call Proc. status:
Idle” is displayed, set the Loop mode using the GPIB command.
Command: TESTMODE INSPECLOOPBACK
5. Set the Pilot signal generation mode using the GPIB command.
Command: TESTPILOTCH ON
6. Measure ρ of RF signal and read the result using the modulation analysis function of transmitter
tester.
7. Change the settings as “Using Specification: J-STD-008” and “CDMA Channel: 600” and perform
the measurement as same as above to read the result.
Waveform quality of signal generator
Waveform quality
Measurement uncertainty
Effective lower limit
600 CH (1960 MHz)
__________
__________
<0.001
0.99
340 CH (880.2 MHz)
__________
__________