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|  MIL-C-64025(AR)
3.7. - Tuning Electronic Components Assembly Performance .
This section describes t-he -performance character-
characteristics
istics of the Tuning electronic components assembly (Tuner), assembly
number 9333578.
3.7.1 Reflectometer -verification. - When tested per 4.5.5.1, the
following .conditions apply unless otherwise noted; the auto tune
select-able inductors shunted (shorted) and capacitors disabled
(disconnected) , -an RF signal of -11.0 VRMS at frequency Fo (as
specified in the 9333026 drawing) having a source impedance of 50 Ohms
applied to RFIN (A1-E14) and the XFER RELAY input (AI-E16) connected
to GROUND (A1-E18).
...
3.7.1.1 Reflectometer output - 50 ohm load.
With a 50 ohm
resistive load between RFOUT (A2-E13) and 'GROUND, the VREFL output
(A1-E17) shall be 0.15 Vdc maximum when tested per 4.5.5.1.1.
3.7.1.2 Reflectometer output .- 75 ohm load.
With a 75 ohm
resistive load between RFOUT and GROUND, the VREFL output shall be
between 0.75 Vdc to 1.25 Vdc when tested per 4.5.5.1.2.
3.7.1.3 Reflectemeter output - no load. With RFOUT unterm-
inated the VREFL output shall be 4.5 Vdc minimum when tested per
4.5.5.1.3.
3.7.2 Inductor elements. The Tuner assembly shall have the
capability of switching four inductors between RFIN and RFOUT. Each
inductor shall be individually controlled by a single data bit in the
TUNE DATA pattern as shown in Figure 5. The four inductance values and
associated data patterns shall be as specified in Table 1 when tested
per 4.5.5.2.
TABLE 1
Data Pattern
Inductance
Pattern
at 2.5Mz + 5%
(bits 12345678)
A
0.75uH + 10%
00001000
00000100
B
1.5 U H + 1 O %
c
3.O UH + 5 %
00000010
6.0 U H + 5%
D
00000001
3.7.3 Capacitor
elements
The Tuner assembly shall have the
capability of switching four capacitors between the RFOUT and GROUND.
Each capacitor shall be individually controlled by a single data bit
in the TUNE DATA pattern as shown in Figure 5. The four capacitance
values and associated data patterns shall be as specified in Table 2
when tested per 4.5.5.3.
12
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