Vectronics VEC-884 User Manual
Page 46
VEC-884 Owner's Manual
Advanced Features Error! Main Document Only.-6
Examples: (These are hypothetical examples.)
Suppose you forget what you stored in memory filter 3. You position the
controls as follows:
Control Position
Meaning
Memory button:
in
select memory filters
Filters switch:
3 (2BP)
memory filter 3
Manual Notch button:
out
manual notch off
Auto Notch button:
in
auto notch on
Noise Reduction control:
midrange
reduction level 5
Noise Reduction button:
in
noise reduction on
Auto Notch aggressiveness: jumper-programmed
level 3
Then release the DSP button out, press and release the Program button, and
the VEC-884 sends:
BP CF 1025 BW 350 AN 3 NR 5
You now know that in memory position 3 you have a narrow band-pass filter
with a bandwidth of 350 Hz and center frequency of 1025 Hz. The unit also
sent your current settings for notch and noise reduction. Now suppose you
try memory filter 6.
Turn the Filters switch to 6 (RTTY).
Press the Program button and the VEC-884 sends:
RTTY CF 1360 BW 279 NR 5
In this position, you have saved a jumper-programmed RTTY filter with the
center frequency of 1360 Hz and a bandwidth of 279 Hz. These are the
settings for European RTTY. Notice that there is nothing sent for auto notch
because it is disabled in the RTTY filter.
These are examples of the individual filter settings:
LR/HR
•
High-pass/low-pass (LR < HR):
LRHR 2000-3400
•
Band-stop filter (LR > HR):
LRHR 0-1400 2200-3900
•
All-pass filter (LR = HR):
LRHR 0-3900
BP
•
Normal
filter:
BP CF 1500 BW 2100
•
Limited filter:*
BP CF 675 BW 1350