MAX2560/MAX2566/MAX2572 Evaluation Kits
WCDMA Mode
width at 10MHz offset should be -62dBc. Note that
C112–C115 are disconnected for this measurement.
Perform the following steps to evaluate the MAX2566/
MAX2572 in the WCDMA mode:
GSM 900 Mode
Perform the following steps to evaluate the
MAX2566/MAX2572 in the GSM 900 mode:
1) Verify shunt JU24 is in the LOUMTS position.
2) With MAX2560/MAX2566/MAX2572 control software
active in the REG screen, use Tables 2 and 3 to set
the operating mode to WCDMA.
1) Verify shunts JU23–JU26 and JU33 positions with
Table 4.
3) Connect the I and Q outputs of the arbitrary wave-
form generator to the I (J15) and Q (J16) ports. Set
the generator to WCDMA settings. Verify 300mV
peak baseband signal on Q+/Q- (JU2) and I+/I-
(JU1), or 600mV peak-to-peak differential.
2) With MAX2560/MAX2566/MAX2572 control software
active in the REG screen, use Tables 2 and 3 to set
the operating mode to GSM 900 mode.
3) Connect the I and Q outputs of the arbitrary wave-
form generator to the I (J15) and Q (J16) ports. Set
the generator to GSM settings. Verify 300mV peak
baseband signal on Q+/Q- (JU2) and I+/I- (JU1), or
600mV peak-to-peak differential.
4) The MAX2566 EV kit requires an external LO input.
Apply an external LO 1565MHz at -10dBm to the
LOH port.
5) Connect RFH0 (J1) to the spectrum analyzer.
Configure the spectrum analyzer to measure ACPR
for the uplink WCDMA. Set the center frequency to
1950MHz with 50MHz span and a +10dBm refer-
ence level.
4) The MAX2566 EV kit requires an external LO input.
Apply an external LO 1190MHz at -10dBm to the
LOH port.
5) Connect GSM (J3) to the spectrum analyzer.
Configure the spectrum analyzer to measure spec-
tral mask for the GSM signal. Set the center fre-
quency to 900MHz with 50MHz span and a
+10dBm reference level.
6) Adjust the R1 (VGCRF) and R6 (VGCIF) (only adjust
VGCIF if VGS = 1) to obtain an output power of
+8dBm after accounting for cable and connector loss.
The ACPR in 3.84MHz bandwidth at 5MHz offset
should be -49dBc, and the ACPR in 3.84MHz band-
Table 1. MAX2560 Register Settings
REGISTER (hex)
FRAC_SYNTH
FRAC
CELLULAR CDMA
0B4FDF
PCS CDMA
0B4FDF
005555
000519
00D830
09F49F
07A307
000025
020000
000497
00D830
09C01F
07A307
000025
IF_N
IF_SYNTH
OPCTRL
CONFIG
TEST
Table 2. MAX2566 Register Settings
REGISTER (hex)
FRAC_SYNTH
FRAC
WCDMA
0B603B
03B13B
000302
00D80D
0DF77F
07A103
000025
GSM 900
0B602C
09D89E
000244
DCS 1800
0B602C
09D89E
000244
00D80D
0D876F
04BD0F
000025
GSM 1900
0B602C
09D89E
000244
00D80D
0D876F
04BD0F
000025
IF_N
IF_SYNTH
OPCTRL
CONFIG
TEST
00D80D
0D876F
07BD007
000025
10 ______________________________________________________________________________________
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