JPF-21F Series
QUADRAPHASE MODULATORS
Units to 3 GHz / High Data Bandwidth / Differential ECL/TTL Compatible Drive / Hi-Rel Package
PRINCIPAL SPECIFICATIONS
Model
Number
JPF-21F-***B
Center
Frequency,
f
o,
MHz
1200 - 2500
RF
Amplitude
Input
Balance at,
Bandwidth
dB, Max.
10% of f
o
1.0
Phase Balance
at Center, f
o
Typ. Max.
±2°
±5°
Phase Balance
at 10% Band Limits
Typ.
Max.
±2°
±5°
Insertion
Loss,
dB, Max.
10
For complete Model Number replace *** with desired Center Frequency, f
o
in MHz.
General Notes:
1. 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.
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. Differential
drive allows easy interface with ECL/TTL drivers.
3. Units in the JPF-21F series are available from stock with a 1500 and 2500
MHz center frequency and from 1500 to 3000 MHz for special orders.
4. 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.
GENERAL SPECIFICATIONS
Impedance:
50
Ω
nom.
VSWR:
1.5:1 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
F-Size Flatpack
Modulation Sequence
Data Ports 1, 2
0, 0
ref. 0°
1, 0
-- 270°
1, 1
-- 180°
0, 1
-- 90°
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.
14Feb96
F rf t e if r to c n a t
M ERRI AC /41 Faifel Pl,W estCal el,NJ,07006 / 201-
o ur h r n o ma in o t c
M
ri d .
dw l
575-
1300 /FAX 201- 0531
575-
MERRIMAC [ MERRIMAC INDUSTRIES, INC. ]
