Agilent Technologies E8285A Manual page 117

Channel Power Loopback Verification Test
Channel power is extremely important in the ability of the Test Set to
maintain a link with and properly control power output levels of the mobile
phone under test. Channel power loopback verification is a quick way to ensure
that both the average and channel power measurements are working properly.
1. Press the green Preset key to configure instrument to default settings.
2. Connect a short RF cable between the RF IN/OUT port and DUPLEX OUT
3. Configure the Test Set for channel power loopback mode (this is a
4. Perform the Channel Power Loopback Measurement:
The "Ideal Mobile Power" value is not applicable for this test
NOTE
5.
Suggestion: Store instrument settings as a Save/Recall register (press the Save
key). Name the register CPWR_LB.
Chapter 4
port
non-standard user mode).
3a. Press the (CDMA SCREENS) Call control key and set the RF Chan Std
field to US PCS.
3b. Press the Config key and set the following fields:
• RF Display: Freq
• RF Offset: On
• (Gen) - (Anl): 0 MHz
• Output Port: Dupl
• Input Port: RF In
3c. Press the (CDMA SCREENS) Call control key. On the CDMA CALL
CONTROL screen, set the following fields:
• RF Gen Freq: 1900 MHz
• Place cursor on the Avg Power field and select Chan Power
• Place cursor on the Power Meas field.
• Press the knob or Enter key to begin calibration routine
• Press the Yes key to continue the calibration routine
• Place cursor on the Sctr A Pwr field
• Step the Sctr A Pwr level from –5 to –60 dBm in 5 dB increments.
• Measured channel power should be within a few dB of the sector power
output level setting
Record results in Table 4-1 on page
Functional Verification
Channel Power Loopback Verification Test
123.
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