JPM-2A & 4A Series
QUADRAPHASE MODULATORS
5 to 1000 MHz / 10% and Octave Bandwidths / High Data Bandwidth / Low Conversion Loss /
SMA
PRINCIPAL SPECIFICATIONS
Model
Number
JPM-2A-***B
JPM-4A-***B
Center
Frequency, f
o
5 - 1000 MHz
5 - 300 MHz
†
GENERAL SPECIFICATIONS
Amplitude Balance:
Phase Balance:
Insertion Loss:
0.5 dB typ.,
1.0 dB max.
±2°
typ.,
±5°
max.
6 dB nom.
9 dB max.
50
Ω
nom.
1.5:1 max.
0 dBm nom.
Bandwidth
RF Input
10% of f
o
67% of f
o
For complete model number replace *** with desired LO center freq, f
o
in MHz.
General Notes:
1. Units in the JPM-A series of Quadraphase Modulators are
composed of two biphase modulators, a 90° quadrature hybrid and an
in-phase power combiner.
2. These devices are generally used in systems to generate 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. All units in this series may be ordered with optional integrated
TTL drivers.
3. 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.
RF Impedance:
VSWR:
RF Input Level:
Data Modulation
Bandwidth:
DC to
†
50 MHz nom.
Modulation Sequence
Data Ports 1,2: 0,0: ref. 0°
1,0: -- 270°
1,1:-- 180°
0,1: -- 90°
Data Signals Levels
Logic 1:
+15 mA nom.
Logic 0:
-- 15 mA nom.
Weight, nominal:
2 oz (57 g)
Operating Temp:
-- 55° to +85°C
†
RF Output and Data Bandwidths are typically much greater than specified.
Package Outline
NOTES:
1. Tolerance on 3 place decimals
±
.020(.51)
except as noted.
2. Dimensions in inches over millimeters.
14Feb96
F rf t e if r to c n a t
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