Xplore Technologies Corp. MC7750 Manual Do Utilizador
Testing
Rev 4 Sep.11
Proprietary and Confidential - Contents subject to change
77
8.
Use the down-arrow key to select
Save setup as dfl
.
9.
Select
Exit
.
Testing CDMA RF Receive path
Note: This procedure segment is performed in
To test the DUT’s receive path:
Note: This procedure
describes steps using the
Agilent 8648C signal
generator — the Rohde &
Schwarz SML03 is shown
for reference only.
describes steps using the
Agilent 8648C signal
generator — the Rohde &
Schwarz SML03 is shown
for reference only.
1.
Set up the signal generator:
Note: This example setup
uses a 200 kHz offset from
band center for testing
using a continuous wave —
you can use any appro-
priate baseband frequency
offset (for example,
100 kHz, 300 kHz, etc.).
uses a 200 kHz offset from
band center for testing
using a continuous wave —
you can use any appro-
priate baseband frequency
offset (for example,
100 kHz, 300 kHz, etc.).
If using a modulated
signal, set the frequency to
band center with no offset.
signal, set the frequency to
band center with no offset.
a.
Press the
Frequency
button to set the frequency to 1960.200 MHz for PCS
band, Channel 600, or 881.720 MHz for Cellular band, Channel 384
b. Press the
Amplitude
button to set the amplitude to -55.0 dBm.
c.
Press the
RF ON / OFF
button to enable or disable the RF port of the signal
generator.
2.
Read back the power level from the main receiver:
a.
AT!ENTERCND
(Unlock the extended AT command set.)
b.
AT!DAFTMACT
(Enter test mode.)
c.
AT!CHAN=600,1
(PCS band, channel 600)
or
AT!CHAN=384,0
(Cellular band, channel 384)
d.
AT!RX=1
(Turn on the main receiver.)
e.
AT!RXAGC?
(Read back the power level, in dBm, from the main receiver.)
Response examples:
·
·
RXAGC = 0xFFFFFF33 = -77 dBm (Signal generator’s RF port is
OFF)
OFF)
·
RXAGC = 0x0021 = -60 dBm typical (Signal generator’s RF port is
ON)
ON)