JTF-2F Series
QUADRAPHASE MODULATOR
10 to 1000 MHz Center Freq / Integrated TTL Drivers / Automated Production Compatible
PRINCIPAL SPECIFICATIONS
Model
Number
JTF-2F-***B
JTF-2F-***B
Center
Freq, f
o,
MHz
10 to 200
200 to 1000
RF
Input
Bandwidth
10% of f
o
10% of f
o
Amplitude
Balance,
dBm, Max.
0.5
1.0
Phase Balance @:
f
o
Band Limits
Max.
Max.
±2°
±3°
±4°
±5°.
Insertion
Loss,
dB, Max.
6
9
VSWR
Max.
1.5:1
1.5:1
For complete Model Number replace *** with desired Center Frequency, f
o
in MHz.
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.
GENERAL SPECIFICATIONS
Impedance: 50
Ω
nom.
RF Input Level:
0 dBm nom.
Modulation Sequence
TTL Data Ports 1,2: 0,0 : ref. 0°
1,0 : +270°
1,1 : +180°
0,1 : +90°
Data Bandwidth:
DC to 5 MHz nom.
(Wider Bandwidths in
larger package)
DC Power:
Weight, nominal:
Operating Temp:
+5 V @ 25 mA nom.
0.35 oz (10 g)
-- 40° to + 85°C
F-size Flatpack
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.
29Apr96
F rf t e if r to c n a t
M ERRI AC /41 Faifel Pl,W estCal
o ur h r n o ma in o t c
M
ri d .
dwel,NJ,07006 / 201- 1300 /FAX 201- 0531
l
575-
575-
MERRIMAC [ MERRIMAC INDUSTRIES, INC. ]
