Programmable Attenuators
P-AT Series
s
Features
1. Used for frequencies from DC to 26.5GHz (max.)
Input/output couplings utilizes Hirose’s HE*
connector, which is combination of the internal
attenuation elements, provides the required
attenuation characteristic.
2. Self-disconnecting
The drive current will automatically switch off after
setting the attenuation.
3. Automatic return
In the event of sudden shock the attenuation will
quickly return to the pre-set level.
s
Applications
Wide variety of measuring instruments and other
devices requiring control of high frequency
transmission lines.
* HE connector will mate with K type connectors
* K connector is a trademark of Anritsu Co.
s
Product Specifications
Ratings
Frequency range
DC~8GHz(P-AT-6,AP-AT-7)
Operating temperate range
Operating relative humidity
DC~26.5GHz(P-AT-8)
-10ç to +75ç(No
freezing)
95%
Max.
Characteristic
1.Vibration
2.Shock
Requirements
No electrical discontinuity of 1 µs or more
No damage, cracks, or parts dislocation
Conditions
Frequency of 10 to 55 Hz, overall amplitude of 1.5
mm for 2 hours in each of 3 directions
Acceleration of 98 m/s
2
, sine half-wave waveform,
3 cycles in each of the 3 axis
3.Temperature cycle
No damage, cracks, or parts dislocation
qThe
test method conforms to MIL-STD-202.
s
Materials and Finishes
Component
Body
Coupling connector body
Female contact
Material
Aluminum
Stainless steel
Beryllium Copper
Finish
Conductive alumite
Passivated
Gold plating
s
Ordering Information
P-AT - 6 ( 8 - 70 ) A
1
1
Series Name
2
Suffix
3
Maximum frequency (GHz)
4
Maximum attenuation (dB)
5
Revised
2
3
4
5
102
s
Specifications
Part Number
Attenuation Accuracy
Frequency
V.S.W.R. Attenuation
(dB)
Range
(Max)
(dB)
(GHz)
5dB 10dB 20dB 40dB
DC~8
DC~8
1.35
1.35
0~70
(10dB --- ±0.5 ±0.6 ±1
STEP)
0~75
(5dB ±0.5 ±0.5 ±0.6 ±1
STEP)
Insertion
Switching
Switching
Switching
Loss Impedance Power
Operating
Weight
Current
Connectors
Volt
Time
(Each Section)
(dB) (ohms) (W)
Life
(g)
(DC V)
(ms)(Max)
(mA)
(Max)
1.5
50
1(CW)
+24
120+200
∞3
section
160+200
∞4
section
P-AT-6(8-70)A
P-AT-7(8-75)A
20
2∞10
6
HE-J
250
1.5
50
1(CW)
+24
20
2∞10
6
HE-J
300
1.4
(DC∼
12GHz) 0~70
(10dB
P-AT-8(26.5-70)A DC~26.5
1.7
STEP)
(12∼
26.5GHz)
---
Ref table 1
0.55+
0.06∞f(GHz)
50
1(CW)
+24
120+200
∞3
section
20
2∞10
6
HE-J
240
Frequency Range
（GHz）
Attenuation Accuracy(dB)
10dB 20dB 30dB 40dB 50dB 60dB 70dB
DC~8
8~12
12~20
20~26.5
±0.3 ±0.5 ±0.6 ±0.7 ±0.8 ±1.0 ±1.1
±0.4 ±0.5 ±0.7 ±0.9 ±1.0 ±1.3 ±1.5
±0.5 ±0.6 ±0.8 ±1.1 ±1.2 ±1.4 ±1.7
±0.7 ±0.8 ±1.0 ±1.5 ±1.6 ±1.9 ±2.3
s
Typical Data
P-AT-7(8-75)A
［dB½
75
［dB½
2.0
1.0
0
50
45
70
Attenuation
Insertion Loss
65
60
55
VSWR
1.35
1.30
1.20
1.10
1.00
DC
スルー（0dB）
40
35
30
25
20
15
2
4
6
8
10
5
0
DC
2
4
6
8
Frequency
〔GHz〕
Frequency
〔GHz〕
103
s
External Dimensions
P-AT-6(8-70)A
340
Control connector
HIF3BA-10D-2.54R
10-conductor flat ribbon cable
9.55
117
97.9
9.55
2-M3∞0.5
4mm deep
Opposite side is the same
2-
1
/
4
-36UNS-2A
47.1
RF IN
Circuit Organization
Section Number
RF IN
10dB
40dB
20dB
1
2
Through
3
RF OUT
(23.15)
51.6
Opposite side is the same
(23.15)
RF OUT
P-AT-7(8-75)A
250
6.9
12.6
22
Control connector
HIF3BA-10D-2.54R
10-conductor flat ribbon cable
9.55
142.8
123.7
9.55
2-M3∞0.5
4mm deep
Opposite side is the same
47.1
22
2-
1
/
4
-36UNS-2A
Circuit Organization
Section Number
RF IN
10dB
40dB
20dB
5dB
1
2
Through
3
4
RF OUT
RF IN
(23.15)
77.4
Opposite side is the same
RF OUT
(23.15)
104
6.9
12.6
K
HIF3BA-10D-2.54R
Contact No.
P-AT-6(8-70)A,P-AT-7(8-75)A
K
HIF2B-14-2.54RB
Contact No.
P-AT-8(26.5-70)A
1
3
5
7
9
1
7
2
4
6
8
10
14
8
B
Attenuation Change Contact No.(Connect Ground)
Section No.
Contact
No.
1
P-AT-6(8-70)A
2
1
P-AT-7(8-75)A
2
13
P-AT-8(26.5-70)A
2
White
10dB
9
Brown
40dB
5
Yellow
20dB
----
----
----
White
Black
10dB
0dB(Through)
4
3
Purple
Gray
40dB
0dB(Through)
6
11
Green
Green
20dB
0dB(Through)
8
----
Orange
----
5dB
----
White
Black
10dB
0dB(Through)
4
3
Purple
Gray
40dB
0dB(Through)
6
5
Green
Blue
20dB
0dB(Through)
----
7
----
Yellow
----
0dB(Through)
1
Cable Color Attenuation Contact
No.
Black
0dB(Through)
3
2
Cable Color Attenuation Contact
No.
Gray
0dB(Through)
5
3
Cable Color Attenuation Contact
No.
Blue
0dB(Through)
----
4
Cable Color Attenuation
----
----
Part No.
B
Drive Voltage Contact No.
Section No.
DC24V
Contact
No.
9
P-AT-6(8-70)A
10
9
P-AT-7(8-75)A
10
6
P-AT-8(26.5-70)A
----
----
Brown
Red
----
----
----
12
----
----
----
Purple
----
----
----
4
10
1,7,8,14
----
Blue
Orange
----
Brown
Red
8
Connector Body
Orange
----
----
----
----
----
Cable Color
Red
Ground
Contact
No.
7
Cable Color
Yellow
Open
Contact
No.
----
Cable Color
----
Part No.
K
DC
Drive Circuit (1 Section)
Switching signal to
the RF through side (0 dB)
Solenoid
+24V
Automatic return and
automatic disconnection
by photo sensor
Switching signal to
the RF resistance side
Drive circuit
106
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