DL-700
VA-700
I.R.T. Communications Pty Ltd | www.irtcommunications.com
Page 11 of 23
Revision 10
DELAY & FILTER AMPLIFIER SUB-MODULE
(NOTE: Obsolete – No Longer Available. Information for existing modules only)
GENERAL DESCRIPTION
The DL-700 delay and filter mounting amplifier sub-module allows two DIL delay lines or filters to be fitted to the
VA-700 Eurocard video distribution amplifier for correction of signal timing or shaping of the amplifier frequency
response.
In addition to allowing fitting of fixed or variable delays the DL-700 provides an optional amplifier with up to 3 dB
of gain to compensate for losses in delay lines without affecting the gain range of the VA-700 itself.
A delay trim adjustment of
±
3 ns is provided which may be included in the signal path if required. When installed in
the IRT Eurocard VDA type VA-700 this trim control is aligned with a hole in the front panel to allow fine
adjustment of the delay when in operating configuration.
The DL-700 provides two sockets for fitting DIL delay lines or filters; one of up to 40 pins and one of up to 48 pins.
Pins normally used for grounding connections are connected to ground directly whereas pins normally used for
inputs and outputs are connected to pads to allow the user to easily configure the board to the selected delay or
filter configuration required.
Although delay lines typically produce a low pass filter effect, an additional filter may be included for antialiasing or
to provide a step or “brickwall” effect. Filters may be fitted to provide gaussian, antialiasing, step, emphasis, de-
emphasis or special equalisation characteristics.
Standard features:
•
Useable with most common brands of DIL delay lines and filters.
•
Accommodates one or two delay lines or filters.
•
3 dB gain available.
•
±
3 ns trim accessible through front panel of VA-700 VDA.
Equipment provided:
Standard:
DL-700 Delay or filter amplifier sub-module.
Optional:
DIL delay lines or filters.
A list of filters and delay lines available from IRT may be obtained
by contacting your IRT sales representative.