
F-size Flatpack
JTF-2F Series
10 to 1000 MHz Center Freq / Integrated TTL Drivers / Automated Production Compatible
QUADRAPHASE MODULATOR
For further iformatin contact
MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 201-575-1300 / FAX 201-575-0531
PRINCIPAL SPECIFICATIONS
Center
Freq, f
o,
MHz
RF
Input
Amplitude
Balance,
dBm, Max.
Phase Balance @:
f
o
Band Limits
Max.
Insertion
Loss,
dB, Max.
Model
Number
VSWR
Max.
Bandwidth
Max.
JTF-2F-***B
JTF-2F-***B
10 to 200
200 to 1000
10% of f
o
10% of f
o
0.5
1.0
±
2°
±
3°
±
4°
±
5°.
6
9
1.5:1
1.5:1
For complete Model Number replace *** with desired Center Frequency, f
o
in MHz.
GENERAL SPECIFICATIONS
Impedance:
RF Input Level:
Modulation Sequence
TTL Data Ports 1,2: 0,0 : ref. 0°
50
nom.
0 dBm nom.
1,0 : +270°
1,1 : +180°
0,1 : +90°
DC to 5 MHz nom.
(Wider Bandwidths in
larger package)
+5 V @ 25 mA nom.
0.35 oz (10 g)
-- 40° to + 85°C
Data Bandwidth:
DC Power:
Weight, nominal:
Operating Temp:
NOTES:
±
.010(.25) except as noted.
1. Tolerance on 3 place decimals
3. Dimensions marked with * apply only at body.
29Apr96
General Notes:
1. Units in the JTF-2F series of Quadraphase Modulators are
composed of two biphase modulators with TTL drivers, 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.
3. Units in the JTF-2F series are available with center frequencies
from 10 to 1000 MHz and having a minimum bandwidth equal to
10% of the center frequency.
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 applications
requiring the highest reliability.