User Manual

Verifying and Setting GPIB Addresses – continued
5/21/04 1X SC4812T–MC BTS Optimization/ATP F-19
DRAFT
Table F-15: Procedure for Calibrating Test Cable Setup Using Advantest R3465
Step Action
5 Using the vernier knob and the cursor keys set the following parameters:
NOTE
Fields not listed remain at default.
Generator Mode: SIGNAL
Link: FORWARD
Level Unit: dBm
CalCorrection: ON
Level Offset: OFF
6 Select the return CRT menu key.
7 Press FREQ key in the ENTRY area.
8 Set the frequency to the desired value using the keypad entry keys.
9 Verify that the Mod CRT menu key is highlighting OFF; if not, press the Mod key to toggle it OFF.
10 Verify that the Output CRT menu key is highlighting OFF; if not, press the Output key to toggle it
OFF.
11 Press the LEVEL key in the ENTRY area.
12 Set the LEVEL to 0 dBm using the key pad entry keys.
13 Zero power meter. Next connect the power sensor directly to the “RF OUT” port on the R3561L
CDMA Test Source Unit.
14 Press the Output CRT menu key to toggle Output to ON.
15 Record the power meter reading ________________________
16 Disconnect the power meter sensor from the R3561L RF OUT jack.
NOTE
The Power Meter sensor lower limit is –30 dBm. Thus, only components having losses < 30 dB
should be measured using this method. For best accuracy, always re–zero the power meter before
connecting the power sensor to the component being calibrated. Then, after connecting the
power sensor to the component, record the calibrated loss immediately.
17 Disconnect all components in the the test setup and calibrate each one separately. Connect each
component one–at–a–time between the “RF OUT” port and the power sensor (see Figure F-13,
“Setups A, B, and C”). Record the calibrated loss value displayed on the power meter for each
connection.
Example: (A) 1st Test Cable = –0.5 dB
(B) 2nd Test Cable = –1.4 dB
(C) 20 dB Attenuator = –20.1 dB
(D) 30 dB Directional Coupler = –29.8 dB
18 Press the Output CRT menu key to toggle Output OFF.
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