PWM-84C Series
PHASE SHIFTERS, DIGITAL
30 to 2500 MHz / 360 Range / 1.4 Resolution / 8-bit TTL Input / Monotonic / SMA Connectors
Connector J3 Pinout
J3 Pin
Function
Ideal phase characteristic
PRINCIPAL SPECIFICATIONS
Model
Number
PWM-84C-***B
PWM-84C-****B
Typical phase characteristic
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Bit 8 (MSB)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1 (LSB)
(NC)
-15V
(NC)
GND
(NC)
(NC)
+15V
Center
Frequency,
f
c,
MHz
30 - 200
200 - 2500
Operating
Bandwidth
30% of f
o
10% of f
o
For complete Model Number replace *** with desired
center frequency in MHz
GENERAL SPECIFICATIONS
LSB
Bit
1
2
3
4
5
6
7
8
Step
1.4°
2.8°
5.6°
11.2°
22.5°
45°
90°
180°
Phase Characteristics:
Minimum Shift: 0° to 360° in 255 steps @ f
c
Phase Accuracy, typ:
±15°
(
±30°above
1 GHz)
(Guaranteed Monotonic)
MSB
Package Outline
RF Characteristics:
Impedance:
VSWR:
Insertion Loss:
50
Ω
nom.
2.0:1 max.
2 dB nom, 3 dB max.
(3 dB nom, 4.5 dB max
above 1 GHz)
Loss Var. vs. Phase:1 dB
(1.5 dB above 1 GHz)
Max. Input Power: +10 dBm
Control Characteristics:
Control Input :
8 Bit TTL
Settling Time:
3
µs
max.
Supply Power:
±15
VDC
@ 100 mA max.
Weight, nominal:
4.5 oz (125 g)
Operating Temp.:
-- 55° to +85°C
NOTES:
1. Tolerance on 3 place decimals
±
.020(.51) except as noted.
2. Dimensions in inches over millimeters.
26Apr96
General Notes:
1. Phase Shifters in the PWM-84C series provide a
minimum of 360° phase shift in 8 binary increments (255
steps) of approximately 1.4° each. Phase shift is produced
using a series of frequency independent analog phase
shifters which are driven by an 8-bit D/A converter. This
method, unlike conventional switched cable designs is
guaranteed to be monotonic even at higher frequencies.
2. The monotonic feature of this design is advantageous
when used for control applications in closed loop systems.
F rf t e if r to c n a t
M ERRI AC /41 Faifel Pl,W estCal el,NJ,07006 / 973-
o ur h r n o ma in o t c
M
ri d .
dw l
575-
1300 /FAX 973- 0531
575-
MERRIMAC [ MERRIMAC INDUSTRIES, INC. ]
