Inovonics 235, Operating And Maintenance Instruction Manual

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Once these adjustments have been made, reduce the PROGRAM
DENSITY and PEAK PROCESSING settings for a less aggressive
“sound.” These two parameters should be experimented with, and a
final choice for the settings based on the collective decision of several
station personnel.
Possible
Problems
Maximum output asymmetry of the 235 Processor is about +130%. If
you crank-up the POS. PEAKS and do not see a corresponding increase
in positive modulation on the Mod-Monitor, here are a couple of things
to check:
1.
The transmitter is not linear , and thus incapable of extra positive
modulation. If the transmitter is plate-modulated, the modulator
tubes could be “soft” or the power supply inadequate to support
positive peaks. If this is the case it is best not to try to obtain
positive modulation in excess of +100%, because transmitter non-
linearity will create spurious sideband energy which will violate the
NRSC “Occupied Spectrum” limits.
2. The Processor output could be wired backwards! If you turn up the
POS. PEAKS and see an increase in negative modulation on the
Mod-Monitor, you are almost certainly assured of a turnover in the
interconnection. Try reversing the + and – terminals, either at the
output of the Processor end or at the input of the transmitter (but
not both, for heaven’s sake!) to see if proper behavior is restored.
REMOTE CONTROL OF THE MODEL 235
Computer and
Modem
Compatibility
Control software provided with the 235 is written in Visual Basic 5
®
. It
runs only under Windows 95
®
or subsequent 32-bit versions of
Microsoft’s popular operating system for IBM-compatibles. The
software enables remote control of the Processor, either from a
computer connected directly to the 235, or via modem interface.
Any Hayes-compatible modem
should permit remote computer control
of the Processor over an intermediate dial-up telephone circuit. The
compatibility issue will be one between the computer’s own modem
and the remote modem associated with the 235 Processor. With full
compatibility between the two modems, the interconnection will appear
transparent, allowing the software to give the same rapid and effective
control over the processing parameters as if the computer were
connected directly.
Interconnection
The 235 Processor is a data output device, thus the RS-232 SERIAL
INTERFACE connector is a DB09 female . A standard serial
interconnect cable may be used to directly connect the Processor to the
computer’s serial (COM) port. As the computer is classed as an input
device, it will have either a DB09 or DB25 male connector. If
necessary, you may use one of the common 25-pin to 9-pin “mouse”
adapter/reducers.