Table of Contents
Advertisement
Functional Verification
Analog Loopback
Analog Loopback
NOTE
Test Sets with firmware revision A.04.5X and above operate only at RF frequencies from
800 to 1000 MHz and 1700 to 2000 MHz. A text only error message "Input value
out of range" , will be displayed if invalid frequencies are set.
Analog loopback configures the Test Set to test all of its major functions. A
problem located in the RF and audio source or RF and audio analyzer paths
will become evident.
In this configuration, the RF and audio generators will be used to simulate a
low level modulated transmitter signal. The RF receiver will be used to
demodulate this signal and pass it on to the audio analyzer to make the
SINAD measurement.
1. Press the green Preset key to configure instrument to default settings.
2. Connect a short RF cable between the DUPLEX OUT port and the
3. Configure the instrument for loopback mode.
114
ANTENNA IN port.
3a. Press the Config key and set the following fields:
• RF Display: Freq
• RF Offset: On
• (Gen) - (Anl): 0 MHz
3b. Press the AF analyzer key and set the following fields:
• Speaker ALC: ON
• Speaker Vol: POT
3c. Press the Duplex key and set the following fields:
• Tune Freq: 501 MHz (FW rev A.02.XX and below)
900 MHz (FW rev A.04.5X and above)
TTune Fre q:
• Input Port: Ant
• RF Gen Freq: 501 MHz (FW rev A.02.XX and below)
900 MHz (FW rev A.04.5X and above)
TRRF Gn Freq:
• Amplitude: –80 dBm
• Output Port: Dupl
• AFGen1 To: FM / 3.10 kHz
• AF Anl In: FM Demod
• Filter 1 300 HPF
• Filter 2 3 kHz LPF
• De-Emphasis OFF
• Detector RMS*SQRT2
S:\agilent\e8285\ALR\Book\chapters\verif.fm
Advertisement
Table of Contents
Troubleshooting
