Test Procedures
Motorola Confidential Proprietary
44
CDMA T720
RF Cable Test
To test the RF cable
for proper loss:
ï Tune Freq should be set to
TX frequency: 834.990000 MHz.
ï RF Gen Freq should be set
to same frequency (834.990000
MHz).
ï Tx Power should be set to
read in dBm, not Watts.
In order to properly measure and adjust the
parametersof a telephone, it is important that
you use RF cabling that has minimal loss.
Therefore, it is important that you test the RF
cable for proper loss. This can easily be done
by using the DUPLEX TEST screen of your
HP8924. To test the cable, set up the DU-
PLEX screen as shown above.
Action:
Take the cable under test and connect it from
the RF in/out port to the Duplex Out port. At
this point you will be getting some type of
power reading for cable loss.
Good range: -.2 dBm through -.8 dBm
Bad cable: More than -.8 dBm
If the reading you are getting showsgain (posi-
tive number,)you may need to zero the power
meter. This mayhappen on an HP8924 whose
memory has just been cleared.
To zero the meter, press the TX button on
the 8924 panel. Bring the cursor down to the
field under TX Pwr Zero where it reads Zero.
Tap the cursor on the Zero field and it will
highlight for a moment as it zeroes the meter.
Set up the screen as shown above, and test
your cable.
D U P LE X TE ST
dB
Tx Frequency
Off
TxPower
-0.62
dBm
AC Level
Off
OffSINAD
Tu ne M
o
de
Auto / Ma nual
Tun e Freq
834.990000
MHz
In put Port
RF In/ A nt
15 KHz
On
/
Ext TXkey
Off
RfGen Freq
834.990000
Ampli
t
u de
0.0
Atte n Ho
l
d
On /O ff
MHz
dBm
RF Ou t /
IFFilter
Ou tpu t Port
Dupl
AF Gen1 Fre q
1.0000
AFGe n1 To
Off
FMCoupling
AC / DC
Aud io Out
AC / DC
FM
KHz
AFAnl In
Audio In
Filter1
50 H z HPF
Filter2
15kHz LPF
DEEmphasis
750 us / O ff
De tecto r
RMS
To Screen
C D M A
CALL CNTL
SMS
AUTHEN
A nalog
RX TEST
C o nfig
PRNT C NFG
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