JPF-21F Series
QUADRAPHASE MODULATORS
A Crane Co. Company
1.0
D1
D1
+15 mA '1'
-15 mA '0'
270°
1.1
BI-PHASE
MODULATOR 1
BI-PHASE
MODULATOR 2
Units to 3 GHz / High Data bandwidth / Differential EXL/TTL Compatible Drive / Hi-Rel Package
0°
0.0
90°
REV: 004, 08/03/10
0.1
180°
OUTPUT PHASE
STATES
RF INPUT
(CARRIER)
90°
QUAD
HYBRID
IN-PHASE
POWER
COMBINER
RF
OUTPUT
D2
D2
+15 mA '1'
-15 mA '0'
TECHNICAL DESCRIPTION / APPLICATION
Units in the JPF-21F series of Quadraphase Modulators are composed of two biphase modulators, a 90°
quadrature hybrid and an in-phase power combiner. These devices are generally used in systems to gener-
ate QPSK coded signals. The units accept two differential data inputs each of which independently biphase
modulates an RF carrier. These are then combined to produce a quadraphase output of 0, 90, 180 and 270
degrees. Differential drive allows easy interface with ECL/TTL drivers. Units in the JPF-21F series are avail-
able from stock with a 1500 and 2500 MHz center frequency and from 1500 to 3000 MHz for special orders.
Merrimac Quadraphase Modulators comply with the relevant sections of MIL-M-28837 and may be supplied
screened for compliance with additional specifications for military and space applications requiring the
highest reliability.
PRINCIPAL SPECIFICATIONS
Amplitude
Balance at
Center, f0,
dB, Max.
1.0
Phase
Balance at
Center, f0
Typ.
±2°
Max.
±5°
Phase
Balance at 10%
Band Limits
Typ.
±2°
Max.
±5°
Model
Number
JPF-21F-***B
Center
Frequency,
f0, MHz
1200-2500
RF Input
Bandwidth
10% of f0
Insertion Loss,
dB, Max.
13.5 dB
For complete Model Number replace *** with desired Center Frequency, f0 in MHz.
GENERAL SPECIFICATIONS
Impedance
50
Ω
nom.
VSWR
RF Input 1.5:1 max.
RF Output 2:1 max.
RF Input
Level
0 dBm nom.
Data
Bandwidth
100 MHz nom.
Data
Signal Levels
Logic 1:+15 mA nom.
Logic 0:-15 mA nom.
Weight,
nominal
0.35 oz.
(10 g)
Operating
Temperature
-55° to +85°C
PACKAGE OUTLINE
.150
3.81
RF OUT
1.000 ± .020
25.40 ± 0.51
DATA 2
DATA 1
.700
17.78
8 PINS SPACED AT
.100 (2.54) TOLERANCES
NON-ACCUMULATIVE
.075
1.90
TYP.
1.000 ± .020
25.40 ± 0.51
Modulation Sequence
Data Ports 1,2
0,0 ref. 0°
1,0 -270°
1,1 -180°
0,1 -90°
DATA 2
.015 ± .005 DIA.
.38 ± .13
TYP. 16 PLACES
.375 ± .030
9.53 ± 0.76
TYP.
RF IN
DATA 1
NOTES:
1. Tolerance on 3 place decimals ± .010(.25) except as noted.
2. Dimensions in inches over millimeters.
3. Dimensions marked with * apply only at body.
4. All unmarked pins are case ground.
.170
4.32
MAX.
RF & Microwave Products / Merrimac Industries / 41 Fairfield Place, West Caldwell, NJ 07006
Tel: 973.575.1300 / Fax: 973.575.0531 / Internet: www.Merrimacind.com
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