PT8000 Service Manual
13
7.2.7 QT (67.0) DEV (set the HP8920 to be in the Tx status, and
set the filter to be 20Hz ~ 300Hz)
a. In the “Tuning Mode”, double click “QT(67.0) DEV”, and
select “Wideband”. Adjust the five frequency points of “Lowest”,
“Low”, “Mid”, “High” and “Highest” respectively within the
range of 0~255 to make the deviation be 0.75kHz.
b. In the “Tuning Mode”, double click “QT(67.0) DEV”, and
select “Narrowband”. Adjust the value within the range of 0~255
to make the deviation be 0.35kHz.
7.2.8 QT (151.4) DEV (set the HP8920 to be in the Tx status, and
set the filter to be 20Hz ~ 300Hz)
a. In the “Tuning Mode”, double click “QT(151.4) DEV”, and
select “Wideband”. Adjust the five frequency points of “Lowest”,
“Low”, “Mid”, “High” and “Highest” respectively within the
range of 0~255 to make the deviation be 0.75kHz.
b. In the “Tuning Mode”, double click “QT(151.4) DEV”, and
select “Narrowband”. Adjust the value within the range of 0~255
to make the deviation be 0.35kHz.
7.2.9 QT (254.1) DEV (set the HP8920 to be in the Tx status, and
set the filter to be 20Hz~300Hz)
a. In the “Tuning Mode”, double click “QT(254.1) DEV”, and
select “Wideband”. Adjust the five frequency points of “Lowest”,
“Low”, “Mid”, “High” and “Highest” respectively within the
range of 0~255 to make the deviation be 0.75kHz.
b. In the “Tuning Mode”, double click “QT(254.1) DEV”, and
select “Narrowband”. Adjust the value within the range of 0~255
to make the deviation be 0.35kHz.
7.2.10 Rx sensitivity (set the HP8920 to be in the Rx status)
In the “Tuning Mode”, double click “Sensitivity”, and adjust
the five frequency points of “Lowest”, “Low”, “Mid”, “High” and
“Highest” respectively within the range of 0~255 to make the
sensitivity of each frequency point be the highest.
See Table 7.4 for detailed parameters.
7.2.11 Rx squelch (set the HP8920 to be in the Rx status)
a. In the “Tuning Mode” (input RF signal with the same frequency
as the adjusted frequency point and with the signal level of
-115dBm, audio frequency of 1kHz, and deviation of 3kHz to the
antenna connector of the mobile radio), double click “SQL9 On”,
and select “Wideband”. Choose a frequency point, and click
“Begin”, the programming software will adjust the value
automatically. When the value keeps stable, click “OK”, the
adjustment of that frequency point is completed. Use the method
to adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” respectively.
b. In the “Tuning Mode” (input RF signal with the same frequency
as the adjusted frequency point and with the signal level of
-115dBm, audio frequency of 1kHz, and deviation of 1.5kHz to
the antenna connector of the mobile radio), double click “SQL9
On”, and select “Narrowband”. Choose a frequency point, and
click “Begin”, the programming software will adjust the value
automatically. When the value keeps stable, click “OK”, the
adjustment of that frequency point is completed. Use the method
to adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” respectively.
c. In the “Tuning Mode” (input RF signal with the same frequency
as the adjusted frequency point and with the signal level of
-116dBm, audio frequency of 1kHz, and deviation of 3kHz to the
antenna connector of the mobile radio), double click “SQL9 Off”,
and select “Wideband”. Choose a frequency point, and click
“Begin”, the programming software will adjust the value
automatically. When the value keeps stable, click “OK”, the
adjustment of that frequency point is completed. Use the method
to adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” respectively.
d. In the “Tuning Mode” (input RF signal with the same frequency
as the adjusted frequency point and with the signal level of
-116dBm, audio frequency of 1kHz, and deviation of 1.5kHz to
the antenna connector of the mobile radio), double click “SQL9
Off”, and select “Narrowband”. Choose a frequency point, and
click “Begin”, the programming software will adjust the value
automatically. When the value keeps stable, click “OK”, the
adjustment of that frequency point is completed. Use the method
to adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” respectively.
e. In the “Tuning Mode” (input RF signal with the same frequency
as the adjusted frequency point and with the signal level of
-122dBm, audio frequency of 1kHz, and deviation of 3kHz to the
antenna connector of the mobile radio), double click “SQL1 On”,
and select “Wideband”. Choose a frequency point, and click
“Begin”, the programming software will adjust the value
automatically. When the value keeps stable, click “OK”, the
adjustment of that frequency point is completed. Use the method
to adjust the five frequency points of “Lowest”, “Low”, “Mid”,
“High” and “Highest” respectively.
f. In the “Tuning Mode” (input RF signal with the same frequency
as the adjusted frequency point and with the signal level of
-122dBm, audio frequency of 1kHz, and deviation of 1.5kHz to
the antenna connector of the mobile radio), double click “SQL1
To Next Page
Loading...
