Programmable Attenuators
Models 4246 & 4248
Phase Compensated GaAs Switched
Programmable Attenuator
Low Insertion Loss, High IP3
INSERTION LOSS, Maximum (dB):
Frequency Range
10 MHz - 1 GHz
1 - 2 GHz
2 - 2.5 GHz
4246
8.0
9.0
10.0
4248
10.5
12.0
13.0
10 MHz to 2.5 GHz
4 Watts
INCREMENTAL ATTENUATION ACCURACY:
CELL
dB
0.25
+0.15
0.50
1
2
4
8
16
24
32
48
+0.15 +0.2 +0.2
+0.2 +0.2 +0.3
+0.4 +0.6 +0.8
Features
Ideal for use in Wireless/Cellular, RF simulation/Emulation,
& Communication Test Applications.
o
Broadband Performance -
10 MHz to 2.5 GHz
o
High IP3 and High Power Rating
- Utilizes MESFET Switching
o
Flexible DC Voltage (+5 to +15 V)
o
Low DC Power Consumption
- Ideal for portable
battery powered equipment.
o
Custom Configurations including bus controlled
attenuator subsystems
MONOTONICITY:
10 MHz to 2.5 GHz
3rd ORDER INTERMODULATION (IM3):
-43 dBm typical,
measured with two +27 dBm tones @ 869 MHz (f1) and
894 MHz (f2), the IM3 frequency being 844 MHz (2fl-f2).
IP3
(input) = +58 dBm
The input IP3 is derived from the following relationship:
IP3 = 3(Pin-
α
)-IM3 +
α
2
where
α
= the insertion loss (dB) at the IM3 frequency;
Pin=single tone input power (dBm).
Specifications
NOMINAL IMPEDANCE:
50
Ω
FREQUENCY RANGE:
10 MHz to 2.5 GHz
MAXIMUM SWR:
Frequency Range
10 - 100 MHz
100 MHz - 200 MHz
200 MHz - 2.5 GHz
SWR
2.00
1.60
1.40
CELL CONFIGURATIONS:
Model
NO.
Attenuation
Number
Cells Range/Steps
(dB)
4246-63
4248-63.75
6
8
63/1
63.75/0.25
Cell
Increments
(dB)
1, 2, 4, 8, 16, 32
0.25, 0.50, 1, 2, 4, 8
16, 32
1, 2, 4, 8, 16, 24, 48*
POWER RATING:
4 Watts maximum
SWITCHING TIME:
5
μsec.
maximum
OPERATING VOLTAGE:
+ 5 V to +15V
OPERATING CURRENT:
25 mA typical
INCREMENTAL RELATIVE PHASE:
+5° between 0 and.25, 1, 2, 4, 8, 16 dB
+10° between 0 and 32, 48 dB
TEMPERATURE RANGE (Operating):
0°C to +70°C
TEMPERATURE COEFFICIENT:
<0.002/dB/dB/°C
CONNECTORS:
SMA female connectors - mate nonde-
structively with MIL-C-39012 connectors.
CONTROL CONNECTOR:
AMP-Latch 10 pin ribbon cable
connector mates with AMP P/N 746285-1 (supplied with
each unit)
CONSTRUCTION:
Housing:
Connectors:
WEIGHT:
Aluminum
Stainless steel body and beryllium
copper contacts.
Model 4246:
Model 4248:
227 g (8.0 oz)
300 g (10.6 oz)
4348-103
8
103/1
*48 dB cell comprised of two 24 dB cells
117
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.aeroflex-weinschel.com email: sales@aeroflex-weinschel.com
Revision Date: 6/23/05
Programmable Attenuators
PHYSICAL DIMENSIONS:
A
B
Control Connector J3 Pin Locations:
TTL Conn
PIN No. (J3)
1
2
3
4
5
6
7
8
9
10
4238-63
dB (Cell)
1
2
4
16
32
8
NC
NC*
+5 Vdc
COM
4240-63.75
dB (Cell)
0.25
0.50
1
2
4
8
16
32
+5 Vdc
COM
4208-103
dB (Cell)
1
2
4
8
16
24
48
NC*
+5 Vdc
COM
NOTE:
Model No.
4246-X
4248-X
A
82.50 (3.25)
118.10 (4.65)
B
122.50 (4.81)
157.7 (6.21)
All dimensions are given in mm (inches) and are
maximum, unless otherwise specified.
NC = Not Connected
* For Factory use only.
CONTROL CONFIGURATION:
Units are supplied with a
built-in TTL interface. Each unit is supplied with a mating 10
pin connector (Amp 746285-1). Refer to Physical
Dimensions for mating connector pin/wiring details. Two
wires are specified for supply voltage and ground. The
remaining wires will accept TTL control signals to activate
or de-activate a particular attenuation cell. A TTL high will
energize a cell to the high attenuation state, whereas a TTL
low will maintain a cell in its zero attenuation state.
118
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.aeroflex-weinschel.com email: sales@aeroflex-weinschel.com
Revision Date: 6/23/05
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
