Operating Principles - Linear DC1957A Demo Manual

DEMO MANUAL DC1957A

OPERATING PRINCIPLES

60
DETECTOR = PEAK HOLD
RBW = 120kHz
VBW = 300kHz
50
SWEEP TIME = 680ms, ≥ 10 SWEEPS
NUMBER OF POINTS = 501
40
30
20
10
T = 25°C
A
0
–10
–20
–30
0 100
2
LTM2892-S
V
5V
CC1
V
L1
ON1
EOUTD
INC
CS(IN)
INB
SDI(IN)
INA
SCK(IN)
OUTF
OUTE
OUTD
SDO(OUT)
GND1
Figure 1. SPI Pin Definition
200 300 400
Figure 2. DC1957A Radiated Emissions
V CC2
V L2
ON2
EOUTA
OUTC
OUTB
OUTA
INF
INE
IND
GND2
dc1957a F01
500 600
FREQUENCY (MHz)
5V
CS(OUT)
SDI(OUT)
SCK(OUT)
SDO(IN)
NOTE: INE AND INF ARE
OPTIONAL CONNECTIONS
DUT CISPR 22 CLASS B LIMIT
700 800 900 1000
dn1957a F02
dc1957af