Agilent Technologies 8935 Series, Manual

Page: 172 / 343

Chapter 7 171
Periodic Adjustments
Eb/No Calibration Program Description
Eb/No Calibration Program Description
The Eb/No calibration is a CDMA loopback measurement. Before the
Eb/No measurement begins, four preliminary measurements are made
with the CDMA generator in the data mode: (1) The difference in
channel power between forward and reverse modes is measured to
determine the loss to be accounted for when the all-pass filter is in
forward mode. (2) Rho is measured in both the forward and reverse
paths. (3) The time offset is measured and its value entered. (4) Fast
power is measured to assure that the signal is “noiseless.”
The generator is then set to the Eb/No mode at values of 7, 10, 12, 14,
16, 18, and 20 dB, and one hundred measurements of fast power are
made at each value. (This takes several minutes to complete.) The
measured data is then processed and converted into calibration factors.
Figure 7-6 Eb/No Calibration
servsrn1.eps
SOFTWARE MENU Screen
SOFTWARE MENU
Description:
Launches disgnostic and calibration programs.
Continue
1
2
4
Run Test
Help
SOFTWARE MENU
Library:
[NO LIB] Program:
ROM
CUSTOMIZE TEST PROCEDURE:
Channel Information
Test Parameters
Order of Tests
Pass/Fail Limits
Save/Delete Procedure
SET UP TEST SET:
Execution Cond
External Devices
Printer Setup
IBASIC Cntrl
LOAD TEST PROCEDURE:
Select Procedure Location:
ROM
Select Procedure Filename:
SERVICE4
Exec
Cnfg
Print
IBASIC Freq
Parm
Seqn
Spec
Proc
ebno1.eps
SERVICE MENU
1
2
3
4
5
Help
Exit
Functional Diagnostics
AF Diagnostics
RF Diagnostics
CDMA Diagnostics
Edit RF Diagnostic Limits
Periodic Calibration
IQ Calibration
Eb/No Calibration
=>
Move pointer to the desired program using the
knob then press the knob. Press HELP for
information on the tests. Press EXIT to abort.
SERVICE MENU Screen