Chapter 2 411
Performance Verification Tests
59. Comms Absolute Power Accuracy (Options BAC or BAH)
1. Press Preset on the analyzer. Press the Factory Preset softkey, if it is
displayed. Wait for the preset routine to finish.
2. Perform a complete self-alignment and set Auto Align Off. Press
System, Alignments, Align Now, All, and wait for the alignment routine
to finish. Then, press Return, Auto Align, Off.
3. Zero and calibrate the power meter and power sensor connected to
Channel A of the power meter.
4. Connect the equipment as shown in Figure 2-77.
5. Preset the synthesized signal generator. Press:
Blue Key, Special, 0, 0 and set the signal generator as follows:
FREQUENCY, 50 MHz
AMPLITUDE, 15 dBm
6. Set the 10 dB and 1 dB step attenuators to 0 dB.
7. Obtain the actual attenuation for the 0 dB setting of each attenuator
at 50 MHz from the metrology data for the step attenuators. In some
cases this value might be zero, by definition. Add the two actual
attenuations to obtain the 0 dB reference attenuation.
For example, if the actual attenuation for the 10 dB step attenuator
at the 0 dB setting is 0.03 dB, then 10 dB Actual0dB is 0.03 dB. If the
actual attenuation for the 1 dB step attenuator at the 0 dB setting is
–25 –5 10 10 0 40 15
Table 2-116 GSM Transmit Power (Option BAH), Preamp Off, Input Level
>−20 dBm
Nominal
Input
Level
(dBm)
Reference
Level
(dBm)
Resolution
Bandwidth
(kHz)
Internal
Attenuator
(dB)
1 dB Step
Attenuator
(dB)
10 dB Step
Attenuator
(dB)
Nominal
Source
Level
(dBm)
15 15 300 40 0 0 15
15 30 300 40 0 0 15
Table 2-115 cdmaOne Channel Power (Option BAC), Preamp Off, Input
Level ≥–25 dBm
Nominal
Input
Level
(dBm)
Reference
Level
(dBm)
Resolution
Bandwidth
(kHz)
Internal
Attenuator
(dB)
1 dB Step
Attenuator
(dB)
10 dB Step
Attenuator
(dB)
Nominal
Source
Level
(dBm)
RefAtten0dB 10 dB Actual0dB 1 dB Actual0dB
+=