EQ-1227
VA-700
I.R.T. Communications Pty Ltd | www.irtcommunications.com
Page 21 of 23
Revision 10
CABLE EQUALISER FOR 75L1/503 CABLE SUB-MODULE
(NOTE: Obsolete – No Longer Available. Information for existing modules only)
GENERAL DESCRIPTION
The EQ-1227 equaliser sub-board provides the correct equalisation to match 75L1/503 cable to Telecom
specification 1227 when mounted in the IRT video distribution amplifier type VA-700.
The VA-700T VDA comprises a VA-700 fitted with the EQ-1227 sub-board together with a switch to select between
this and the inbuilt equalisation of the VA-700 for Belden type YR23769 cable. In addition an identification plate is
fitted into the handle of the VA-700 to identify the two switch positions.
Equipment provided:
Standard:
EQ-1227 equaliser sub-module.
Optional:
Instruction manual (included in VA-700/VA-700T manual).
TS01ABE tiny slide switch for mounting on VA-700 PCB to switch
between EQ-1227 and VA-700 inbuilt equaliser.
803729 EQ-1227 EQ 1 / EQ 2 switch identification insert for
handle on VA-700.
TECHNICAL SPECIFICATIONS
Performance:
Cable Equalisation
200 metres 75L1/503 cable Telecom specification type 1227.
Frequency response compliance
± 0.2 dB from 20 Hz to 10 MHz.
Connectors:
0.1” inline PCB mount socket - 8 pin.
Other:
Temperature range
0 - 50° C ambient.
Mechanical
Suitable for mounting in IRT VA-700 VDA.
Dimensions
38 x 18 mm PCB.
Optional accessories
TS01ABE tiny slide switch for mounting on VA-700 PCB to switch between
EQ-1227 and VA-700 inbuilt equaliser.
803729 EQ-1227 EQ 1 / EQ 2 switch identification insert for handle on
VA-700.
Due to our policy of continuing development, these specifications are subject to change without notice.