Anritsu MT8801C - Page 263

Section 6 Peformance Tests
6-20
(4) Test procedures: Neighboring spurious measurement
Step Procedure
1. Initialize the MT8801C and signal generator.
2. Set the MT8801C as follows:
RF Input/Output: Main Set it on the Instrument Setup screen.
Using Specification: IS-95A Set on Setup Common Parameter screen.
Reference Level: 0 dBm Set it on the Setup Common Parameter screen.
CDMA Channel: 1 CH Set it on the Setup Common Parameter screen.
3. Press Next Menu [ ] and [Start] F5 key on the Setup Common Parameter screen of MT8801C to
start Call Processing. Set the Loop mode using the GPIB command when “Call Proc. status: Idle”
is displayed.
Command: TESTMODE INSPECLOOPBACK
Then press the Local key (to release the external control) to display the “Spurious closed to carrier”
screen.
4. Set the signal generator as follows:
Modulation: On
System: IS-95
Output Level: 0 dBm
Simulation Link: Reverse
Filter: SPEC1
Channel: CH1
Channel Assign: Traffic
Long Code Mask: 00000000000
Frame Type: Type1
Data: USER PTN (0000)
5. Set Off “Channel Assign” of “Channel: 2 to 4” of signal generator.
6. Set the frequency of the table below for the MT8801C using the GPIB command:
Command: TXFREQ ####MHZ (* #### is the frequency value to be set in the table below.)
7. Set the above measurement frequency for the signal generator. Execute “Adjust Range” and then
“Measure Single”.
8. Set the marker for each offset frequency point. Read the measurement result. Check whether the
result is larger than or equal to the specification value.
9. Change the measurement frequency and repeat the above measurement steps 6 to 8.
Neighboring spurious measurement
−1.98 MHz
−900 kHz
+900 kHz
+1.98 MHz
________ dB
________ dB
________ dB
________ dB
20 MHz 900 MHz 1.9 GHz 2.2 GHz
________ dB
________ dB
________ dB
________ dB
________ dB
________ dB
________ dB
________ dB
________ dB
________ dB
________ dB
________ dB
±1 dB
61 dB
51 dB
51 dB
61 dB
Effective
lower limit
Measurement
uncertainty