SSF-2F-XXX/ [CRANE]
RF/MICROWAVE SSB MODULATOR, 9dB CONVERSION LOSS-MAX, 16-PIN;
| 型号： | SSF-2F-XXX/ |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | RF/MICROWAVE SSB MODULATOR, 9dB CONVERSION LOSS-MAX, 16-PIN 瞄准线 射频 微波 |
| 文件： | 总2页 (文件大小：92K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SSF-2 Series
SINGLE SIDEBAND MODULATOR
10 to 4000 MHz / Image Rejection to 30 dB / Internal Second Quad / High Sideband Rejection
PRINCIPAL SPECIFICATIONS
GENERAL SPECIFICATIONS
Model
Number
LO Center
Frequency, fo
Bandwidth,
MHz
Outline
Style
(when used as an Up Converter)
RF/IF Input Characteristics
SSF-2F-***/ 10 - 1000 MHz
10% of fo
F
L
Impedance:
VSWR:
RF Power Level:
IF Power Level:
IF Bandwidth:
RF Bandwidth:
50 W nom.
1.5:1 max.
+10 dBm
0 dBm nom.
up to an octave
10%
SSF-2L****/ 1000 - 4000 MHz 10% of fo
A complete Model Number will be assigned with center frequency (***=fo)
and slash number, once a full specification is established with factory.
SIDEBAND REJECTION
Output Characteristics
Conversion Loss:
Sideband Suppression: 25 dB min.
for a given Amplitude and Phase Balance
9 dB max.
50
45
40
35
Operating Temperature:
-- 55 to +85°C
General Notes:
1. Single Sideband Modulators are integrated
networks composed of an in-phase power
divider, two double balanced mixers and two
90°quadrature hybrids. The primary function of
the circuit is to amplitude modulate a carrier such
that all the energy is in either the upper or lower
sideband.
Ampl.
Image
Balance
Rejection
Ratio
0 dB
0.25
2. These units are especially useful in modulator
applications where the desired and undesired RF
sidebands are so close in frequency that it is not
practical to use a bandpass filter to separate
them or where minimum group delay is required.
30
0.5
0.75
1.0
25
20
15
3. By vector subtraction, the undesired sideband
is canceled within the unit (internally terminated)
and the desired sideband is reinforced at the
output. The level of cancellation is usually
expressed as sideband rejection ratio in dB.
2.0 dB
4. The schematic diagram shows how the
desired receiver signals from the two mixers are
combined in-phase at the real (RF/LO) port,
while the undesired spurious signals cancel each
other out. At the image port the reverse occurs
and the unwanted sideband signal is absorbed
by the load resistor. (Continued, next page)
0
0.5
1
1.5
2
2.5
3
Phase Error (degrees)
26Mar96
ForfurtherinformationcontactMERRIMAC/41FairfieldPl.,WestCaldwell,NJ,07006/ 973-575-1300/FAX973-575-0531
SSF-2 Series
SINGLE SIDEBAND MODULATOR
10 to 4000 MHz / Image Rejection to 30 dB / Internal Second Quad / High Sideband Rejection
SSF-2L series
F-Package Outline
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.
L- Package Outline
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.
5. Nominal Weight: 0.55 oz (15.4 g)
General Notes (Continued)
5. From a practical standpoint, there are may considerations affecting sideband suppression, such as the phase and amplitude balances of the individual
components chosen, mixer sensitivity, VSWR interaction, bandwidth, etc.
6. The most useful guide to how much signal rejection may be expected for a given phase error and amplitude balance is shown in the graph. These
curves allow determination of the trade-off between the allowable phase and amplitude errors for a desired image rejection ratio.
7. Merrimac offers a wide range of Single Sideband Modulators to a variety of specifications. The parameters quoted for the SSF series are a basis only
for more exacting requirements. The the minimum image rejection and package size will be impacted most by an increase in bandwidth requirements.
8. Merrimac Single Sideband Modulators comply with applicable portions of MIL-M-28837 and can be supplied screened for additional specifications you
specify for military and aerospace applications requiring higher reliability.
29Apr96
ForfurtherinformationcontactMERRIMAC/41FairfieldPl.,WestCaldwell,NJ,07006/ 973-575-1300/FAX973-575-0531
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