cable modem testing

SmartStep® Subsystems
Cable Modem Testing (75Ω)
& VoIP Testing Subsystems
Mechanical Layout:
o
o
o
o
o
800-1900 MHz frequency range
8 Input Channels to 1 Output Channel
IEEE-488 Interface
Wide Dynamic Range: 63/1 dB steps, 75Ω
Aeroflex / Weinschel 3250T Programmable
Attenuators with built-in driver circuitry.
Simplified Block Diagram:
FRONT
PA NEL
RF1
(J1)
REAR
PA NEL
RF SYSTEM TEST FIXTURE
AT1
A2
IEEE-488
SmartStep
CONTROLLER
ASSY
DEVICE INTERFACE BUS (I2C)
RF2
(J2)
AT2
DEVICE INTERFACE BUS (I2C)
RF3
(J3)
A3
POWER
COMBINER
3
4
2
1
IEEE-488
BUS
S
AT3
RF4
(J4)
TP1
(J11)
AT4
RF0
(J9)
RF OUT (5.0-800 MHz)
TP2
(J10)
RF5
(J5)
TEST PORT 1
1
2
4
3
S
TEST POR 2
A4
POWER
COMBINER
AT5
RF6
(J6)
AT6
DEVICE INTERFACE BUS (I2C)
RF7
(J7)
A5
POWER
COMBINER
4
2
1
S
AT7
+15± 1.7 V
A3
POWER
SUPPLY
ASSY
RF8
(J8)
AT8
S1
POWER ON/OFF
SWITCH/INDICATOR
20
3
XF1
AC INPUT PWR
POWER ON/OFF
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.aeroflex.com/weinschel email: [email protected]
Revision Date: 2/20/09
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