User's Manual

Power Delta Calibration – continued
PRELIMINARY
1X SCt4812ET Lite BTS Optimization/ATP
08/01/2001
H-16
Table H-5: Advantest Power Delta Calibration Procedure
Step Action
20 Press the dB/div CRT menu key.
21 Press the 10 dB/div CRT menu key.
22 Press the FREQ key in Entry area of the control panel.
23 Set the frequency to the desired value using the keypad entry keys.
24 Press the more 1/2 CRT menu key.
25 Press the Preselector CRT menu key to highlight 3.0G.
26 Press the FORMAT key in the Display Control area of the control panel.
27 Press the TRACE CRT menu key.
28 Press the AVG A CRT menu key.
29 Set AVG to 20 using keypad entry keys.
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 H-6).
H