User's Manual Part 3
Power Delta Calibration – continued
DRAFT
SC4812ET BTS Optimization/ATP — CDMA LMF
Apr 2001
G-6
Table G-2: Advantest Power Delta Calibration Procedure
Step Action
30 Press the return CRT menu key.
31 Press the SPAN key in the Entry area of the control panel.
32 Press the Zero Span CRT menu key.
33 Press the BW key in the Entry area of the control panel.
34 Press the RBW CRT menu key to highlight MNL. using keypad entry keys enter 30 kHz.
35 Set RBW to 30 kHz using keypad entry keys.
36 Press the VBW CRT menu key to highlight MNL.
37 Set VBW to 1 MHz using keypad entry keys.
38 Press the Marker ON key in the Display Control area of the control panel.
39 Record the Marker Level reading as result B ________________________.
40 Calculate the Power Calibration Delta value. The delta value is the power meter measurement minus
the Advantest measurement.
Delta = A – B
Example: Delta = –0.70 dBm – (–1.25 dBm) = 0.55 dBm
Example: Delta = 0.26 dBm – 0.55 dBm = –0.29 dBm
These examples are included to show the mathematics and do not represent actual readings.
NOTE
Add this delta value to the TX Cable Loss value during In–Service Calibration (see Step 4 in
Table G-4).
Figure G-3: Delta Calibration Setup – R3561L to HP437B
Advantest
Power
Sensor
RF OUT
Short RF Cable
HP437B
SENSOR
R3561L
FW00803
G