Vectronics VC-300D - Manual (Page 8)

VC-300D Digital Bargraph Antenna Tuner Owner's Manual
8
cross-needle meter display is identical to the power reading of 100 Watts single
tone on the digital display. Without any further adjustment of the level control,
switch your transmitter to SSB and speak normally into the microphone and you will
notice that the cross-needle meter will read approximately 30-40 Watts and the digital
display will show an output of 100 Watts PEP when red LED ignites while you are
speaking. This will confirm that the cross-needle meter reads 30-40 Watts average
assuming you started with the 100 Watts single-tone as described above and the
digital display will read voice peaks of 100 Watts or to say more correctly 100 Watts
PEP.
Note: All cross-needle meters read average power when you are using the transmitter
in the SSB mode. Some cross-needle meter displays are capable of peak-
reading but will read 20% low because of directional coupler driver
impedance problems.
4. After you are satisfied you are getting the right results in (3), while you are speaking
into the microphone with the DELAY control fully counter-clockwise, the forward
peak indication on the meter will be as quick in response as the delay. If this is not a
desirable condition, rotate the DELAY control counter-clockwise until the desired
amount of DELAY is introduced in the display. The forward fast attack time is not
affected by the DELAY control.
TECHNICAL ASSISTANCE
If you have any problem with this unit first check the appropriate section of this manual.
If the manual does not reference your problem or your problem is not solved by reading
the manual you may call VECTRONICS at 601-323-5800. You will be best helped if you
have your unit, manual and all information on your station handy so you can answer any
questions the technicians may ask.
You can also send questions by mail to VECTRONICS, 1007 HWY 25 South, Starkville,
MS 39759 or by Fax to 601-323-6551. Send a complete description of your problem, an
explanation of exactly how you are using your unit, and a complete description of your
station.