 |
|||
|
Page Title:
Harmonic filter characteristics |
|
||
| ||||||||||
|
|  MIL-C-64025(AR)
3.8.1 Harmonic filter characteristics. The following describes
the performance characteristics of the Harmonic Filter, when used at
the MOPMS carrier frequency Fo as specified by drawing 9333026 and
tested per 4.5.6.1.
I
a.Insertion loss:
The insertion loss of the filter
shall be less than 1.0 db.
I
b. Return loss:
The return loss of the filter when
loaded with a 50 ohm real load shall be less than 14db.
c. Harmonic attenuation:
The attenuation of any harmonic
of the fundamental frequency (Fe) up to 40.OMhz shall be greater
than 35db relative to the fundamental. The attenuation of the
second and third harmonic shall be greater than 60db relative to the
fundamental.
.
I
3.8.2 RF Power amplifier. This section describes the
characteristics of the RF Power Amplifier.
3.8.2.1 RF power output.
The power output of the RF Amplifier
at A3-E4 (RF OUT) when loaded with 50 ohms shall be 12 watts minimum
when tested per 4.5.6.2.
The current drain into
3.8.2.2 Current loading_of amplifier.
A3-E3 (VBATT) shall be less than 2.6 amps, when tested per 4.5.6.2.
3.8.3 Tuning atten---or pad. The RF output power shall be
uat -
attenuated by 12 + 2db from the level measured in 4.5.6.2 when tested
per 4.5.6.3.
The RF transmitter shall be
3.8.4 Transmitter cutoff voltage.
disabled when the voltage at A3-E3 (VBATT) is at or below the cutoff
voltage threshold. The cutoff voltage threshold shall be 10.0+0.5
volts when tested per 4.5.6.4.
3.8.5
Current
limiter.
With a short applied between the drain
and source of Q5 in the RF amplifier, the current drain into A3-E3
(VBATT) shall limit to less than 3.0 amps when tested per 4.5.6.5.
3.8.6 Fast turn off inhibit. The RF power into 50 ohms shall go
to 0.0 (+0.2/-0) watts and the DC voltage at A4-E22 (STROBE BUFF) and
A4-E21 (STROBE BUFF-) shall change from 0.0+0.2 volts to 5.0+0.5
volts and from 5.0+0.5 volts to 0.0+0.2 volts respectively when tested
per 4.5.6.6.
With 3.6+1.6 volts applied to A3-E9
3.8.7 Send enable/disable.
(SEND),'the DC voltage at A4-E23 (A.T.+5VDC) shall be 5.0+0.4 VOltS.
When 0.0+0.2 volts is applied to A3-E9 (SEND) the RF power output into
50 ohms shall be 0.0 (+0.2/-0) watts and the DC voltage at A4-E23
shall be 0.0+0.5 volts when tested Per 4.5.6.7.
I
14
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals